./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.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 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 23:52:18,948 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 23:52:18,949 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 23:52:18,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 23:52:18,967 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 23:52:18,968 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 23:52:18,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 23:52:18,970 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 23:52:18,971 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 23:52:18,972 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 23:52:18,973 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 23:52:18,973 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 23:52:18,974 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 23:52:18,974 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 23:52:18,975 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 23:52:18,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 23:52:18,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 23:52:18,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 23:52:18,978 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 23:52:18,980 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 23:52:18,981 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 23:52:18,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 23:52:18,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 23:52:18,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 23:52:18,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 23:52:18,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 23:52:18,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 23:52:18,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 23:52:18,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 23:52:18,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 23:52:18,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 23:52:18,987 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 23:52:18,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 23:52:18,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 23:52:18,989 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 23:52:18,989 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 23:52:18,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 23:52:18,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 23:52:18,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 23:52:18,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 23:52:18,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 23:52:18,994 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 23:52:19,007 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 23:52:19,007 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 23:52:19,007 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 23:52:19,007 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 23:52:19,008 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 23:52:19,008 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 23:52:19,008 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 23:52:19,009 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 23:52:19,009 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 23:52:19,009 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 23:52:19,009 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 23:52:19,009 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 23:52:19,009 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 23:52:19,009 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 23:52:19,010 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 23:52:19,010 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 23:52:19,010 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 23:52:19,010 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 23:52:19,010 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 23:52:19,010 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 23:52:19,010 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 23:52:19,011 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 23:52:19,011 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 23:52:19,011 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 23:52:19,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:52:19,011 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 23:52:19,011 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 23:52:19,012 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 23:52:19,012 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 23:52:19,012 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 23:52:19,012 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 23:52:19,012 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 23:52:19,012 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 23:52:19,012 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 23:52:19,013 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 23:52:19,013 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1af9610c3f2ac44e456633c84d2e8d0495857443026005d5daf994731366c726 [2023-02-14 23:52:19,213 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 23:52:19,234 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 23:52:19,236 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 23:52:19,237 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 23:52:19,237 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 23:52:19,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2023-02-14 23:52:20,267 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 23:52:20,435 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 23:52:20,435 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound10.c [2023-02-14 23:52:20,440 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44e3635ed/4bf52cff7d4b41ae9a8f8061e3723b1d/FLAG2e81032aa [2023-02-14 23:52:20,449 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/44e3635ed/4bf52cff7d4b41ae9a8f8061e3723b1d [2023-02-14 23:52:20,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 23:52:20,452 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 23:52:20,452 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 23:52:20,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 23:52:20,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 23:52:20,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:52:20" (1/1) ... [2023-02-14 23:52:20,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13c9441a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20, skipping insertion in model container [2023-02-14 23:52:20,458 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 11:52:20" (1/1) ... [2023-02-14 23:52:20,462 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 23:52:20,474 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 23:52:20,556 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/egcd2-ll_valuebound10.c[490,503] [2023-02-14 23:52:20,567 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:52:20,572 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 23:52:20,579 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/egcd2-ll_valuebound10.c[490,503] [2023-02-14 23:52:20,585 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 23:52:20,593 INFO L208 MainTranslator]: Completed translation [2023-02-14 23:52:20,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20 WrapperNode [2023-02-14 23:52:20,593 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 23:52:20,594 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 23:52:20,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 23:52:20,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 23:52:20,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20" (1/1) ... [2023-02-14 23:52:20,603 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20" (1/1) ... [2023-02-14 23:52:20,621 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-02-14 23:52:20,621 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 23:52:20,622 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 23:52:20,622 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 23:52:20,622 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 23:52:20,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20" (1/1) ... [2023-02-14 23:52:20,628 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20" (1/1) ... [2023-02-14 23:52:20,637 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20" (1/1) ... [2023-02-14 23:52:20,637 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20" (1/1) ... [2023-02-14 23:52:20,643 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20" (1/1) ... [2023-02-14 23:52:20,648 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20" (1/1) ... [2023-02-14 23:52:20,650 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20" (1/1) ... [2023-02-14 23:52:20,654 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20" (1/1) ... [2023-02-14 23:52:20,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 23:52:20,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 23:52:20,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 23:52:20,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 23:52:20,657 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20" (1/1) ... [2023-02-14 23:52:20,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 23:52:20,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:20,678 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 23:52:20,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 23:52:20,715 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 23:52:20,715 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 23:52:20,718 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 23:52:20,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 23:52:20,719 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 23:52:20,722 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 23:52:20,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-14 23:52:20,723 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-14 23:52:20,800 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 23:52:20,802 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 23:52:20,919 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 23:52:20,923 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 23:52:20,936 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-14 23:52:20,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:52:20 BoogieIcfgContainer [2023-02-14 23:52:20,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 23:52:20,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 23:52:20,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 23:52:20,942 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 23:52:20,942 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 11:52:20" (1/3) ... [2023-02-14 23:52:20,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a152b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:52:20, skipping insertion in model container [2023-02-14 23:52:20,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 11:52:20" (2/3) ... [2023-02-14 23:52:20,943 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a152b07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 11:52:20, skipping insertion in model container [2023-02-14 23:52:20,943 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 11:52:20" (3/3) ... [2023-02-14 23:52:20,944 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound10.c [2023-02-14 23:52:20,955 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 23:52:20,960 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 23:52:20,993 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 23:52:20,997 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;@7e09a042, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 23:52:20,997 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 23:52:21,000 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-02-14 23:52:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-14 23:52:21,005 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:21,006 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:21,006 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:21,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:21,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2023-02-14 23:52:21,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:21,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950218328] [2023-02-14 23:52:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:21,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:21,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:21,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950218328] [2023-02-14 23:52:21,090 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 23:52:21,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418516477] [2023-02-14 23:52:21,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:21,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:21,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:21,093 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:52:21,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 23:52:21,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:21,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 23:52:21,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:21,170 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-14 23:52:21,171 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:52:21,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418516477] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:52:21,171 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:52:21,172 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 23:52:21,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25114014] [2023-02-14 23:52:21,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:52:21,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 23:52:21,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:21,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 23:52:21,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 23:52:21,196 INFO L87 Difference]: Start difference. First operand has 35 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 23:52:21,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:21,217 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2023-02-14 23:52:21,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 23:52:21,220 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2023-02-14 23:52:21,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:21,225 INFO L225 Difference]: With dead ends: 67 [2023-02-14 23:52:21,225 INFO L226 Difference]: Without dead ends: 31 [2023-02-14 23:52:21,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 23:52:21,229 INFO L413 NwaCegarLoop]: 46 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, 46 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 [2023-02-14 23:52:21,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:52:21,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-14 23:52:21,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-14 23:52:21,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 23:52:21,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-02-14 23:52:21,254 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2023-02-14 23:52:21,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:21,255 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-02-14 23:52:21,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 23:52:21,256 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-02-14 23:52:21,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 23:52:21,257 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:21,257 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:21,264 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:21,462 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 [2023-02-14 23:52:21,463 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:21,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:21,463 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2023-02-14 23:52:21,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:21,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159856584] [2023-02-14 23:52:21,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:21,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:21,511 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:21,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1370722681] [2023-02-14 23:52:21,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:21,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:21,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:21,513 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:52:21,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 23:52:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:21,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-14 23:52:21,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-14 23:52:21,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:21,762 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-14 23:52:21,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:21,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159856584] [2023-02-14 23:52:21,762 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:21,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370722681] [2023-02-14 23:52:21,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370722681] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:52:21,763 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:52:21,763 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-14 23:52:21,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289159485] [2023-02-14 23:52:21,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:21,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-14 23:52:21,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:21,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-14 23:52:21,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-14 23:52:21,765 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 23:52:21,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:21,832 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2023-02-14 23:52:21,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:52:21,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 40 [2023-02-14 23:52:21,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:21,834 INFO L225 Difference]: With dead ends: 48 [2023-02-14 23:52:21,834 INFO L226 Difference]: Without dead ends: 40 [2023-02-14 23:52:21,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-14 23:52:21,835 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:21,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:52:21,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-14 23:52:21,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-14 23:52:21,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 23:52:21,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-02-14 23:52:21,846 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2023-02-14 23:52:21,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:21,846 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-02-14 23:52:21,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2023-02-14 23:52:21,847 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-02-14 23:52:21,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-14 23:52:21,848 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:21,848 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:21,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:22,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-14 23:52:22,053 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:22,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:22,055 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2023-02-14 23:52:22,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:22,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609101013] [2023-02-14 23:52:22,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:22,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:22,068 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:22,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936341343] [2023-02-14 23:52:22,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:22,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:22,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:22,076 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:52:22,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 23:52:22,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:22,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-14 23:52:22,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-14 23:52:22,170 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:22,217 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 23:52:22,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:22,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609101013] [2023-02-14 23:52:22,218 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:22,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936341343] [2023-02-14 23:52:22,218 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936341343] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 23:52:22,218 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:52:22,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-14 23:52:22,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195321237] [2023-02-14 23:52:22,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:52:22,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:52:22,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:22,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:52:22,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-14 23:52:22,220 INFO L87 Difference]: Start difference. First operand 33 states and 44 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 23:52:22,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:22,252 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-02-14 23:52:22,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:52:22,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2023-02-14 23:52:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:22,253 INFO L225 Difference]: With dead ends: 39 [2023-02-14 23:52:22,253 INFO L226 Difference]: Without dead ends: 37 [2023-02-14 23:52:22,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-14 23:52:22,254 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 7 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:22,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 120 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:52:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-14 23:52:22,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-14 23:52:22,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 12 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2023-02-14 23:52:22,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-02-14 23:52:22,260 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2023-02-14 23:52:22,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:22,260 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-02-14 23:52:22,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-02-14 23:52:22,261 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-02-14 23:52:22,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-14 23:52:22,262 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:22,262 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:22,273 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-02-14 23:52:22,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:22,467 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:22,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:22,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2023-02-14 23:52:22,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:22,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003042667] [2023-02-14 23:52:22,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:22,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:22,482 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:22,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [77556343] [2023-02-14 23:52:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:22,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:22,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:22,514 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:52:22,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 23:52:22,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:22,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-14 23:52:22,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-14 23:52:22,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:22,832 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-14 23:52:22,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:22,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003042667] [2023-02-14 23:52:22,832 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:22,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77556343] [2023-02-14 23:52:22,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77556343] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 23:52:22,833 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:52:22,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-14 23:52:22,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926871516] [2023-02-14 23:52:22,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:52:22,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:52:22,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:22,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:52:22,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-14 23:52:22,836 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 23:52:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:22,888 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-02-14 23:52:22,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:52:22,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2023-02-14 23:52:22,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:22,890 INFO L225 Difference]: With dead ends: 50 [2023-02-14 23:52:22,890 INFO L226 Difference]: Without dead ends: 48 [2023-02-14 23:52:22,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:52:22,891 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 6 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:22,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 141 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:52:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-14 23:52:22,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-14 23:52:22,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 27 states have internal predecessors, (30), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-14 23:52:22,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-02-14 23:52:22,905 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2023-02-14 23:52:22,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:22,905 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-02-14 23:52:22,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-02-14 23:52:22,905 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-02-14 23:52:22,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-14 23:52:22,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:22,906 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:22,924 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:23,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:23,125 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:23,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:23,126 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2023-02-14 23:52:23,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:23,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966315532] [2023-02-14 23:52:23,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:23,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:23,135 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:23,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1710025636] [2023-02-14 23:52:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:23,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:23,136 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:23,152 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:52:23,154 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 23:52:23,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:23,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-14 23:52:23,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:23,350 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-14 23:52:23,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-02-14 23:52:23,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:23,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966315532] [2023-02-14 23:52:23,444 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:23,444 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710025636] [2023-02-14 23:52:23,444 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710025636] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-14 23:52:23,444 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:52:23,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-14 23:52:23,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22257473] [2023-02-14 23:52:23,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:52:23,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:52:23,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:23,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:52:23,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-14 23:52:23,446 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 23:52:23,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:23,494 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-02-14 23:52:23,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:52:23,494 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-02-14 23:52:23,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:23,495 INFO L225 Difference]: With dead ends: 54 [2023-02-14 23:52:23,495 INFO L226 Difference]: Without dead ends: 52 [2023-02-14 23:52:23,496 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:52:23,496 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 6 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:23,497 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 23:52:23,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-14 23:52:23,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-14 23:52:23,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 30 states have internal predecessors, (33), 16 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-14 23:52:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-02-14 23:52:23,504 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2023-02-14 23:52:23,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:23,505 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-02-14 23:52:23,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-14 23:52:23,505 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-02-14 23:52:23,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-14 23:52:23,505 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:23,506 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:23,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 23:52:23,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:23,711 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:23,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:23,711 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2023-02-14 23:52:23,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:23,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175703176] [2023-02-14 23:52:23,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:23,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:23,725 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:23,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1508346171] [2023-02-14 23:52:23,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:23,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:23,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:23,726 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:52:23,728 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 23:52:23,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:23,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 23:52:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-14 23:52:23,931 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:24,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:24,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175703176] [2023-02-14 23:52:24,001 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:24,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508346171] [2023-02-14 23:52:24,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508346171] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:52:24,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:52:24,001 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-14 23:52:24,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347574258] [2023-02-14 23:52:24,002 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:24,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 23:52:24,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:24,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 23:52:24,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:52:24,003 INFO L87 Difference]: Start difference. First operand 51 states and 64 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-14 23:52:24,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:24,170 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2023-02-14 23:52:24,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 23:52:24,171 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2023-02-14 23:52:24,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:24,172 INFO L225 Difference]: With dead ends: 60 [2023-02-14 23:52:24,172 INFO L226 Difference]: Without dead ends: 58 [2023-02-14 23:52:24,173 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-02-14 23:52:24,182 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 27 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:24,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 97 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:52:24,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-14 23:52:24,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2023-02-14 23:52:24,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 32 states have (on average 1.125) internal successors, (36), 33 states have internal predecessors, (36), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-02-14 23:52:24,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2023-02-14 23:52:24,201 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2023-02-14 23:52:24,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:24,202 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2023-02-14 23:52:24,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 9 states have internal predecessors, (22), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2023-02-14 23:52:24,202 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2023-02-14 23:52:24,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-14 23:52:24,204 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:24,204 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:24,223 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:24,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:24,410 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:24,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:24,416 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2023-02-14 23:52:24,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:24,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834399852] [2023-02-14 23:52:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:24,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:24,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:24,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2004258649] [2023-02-14 23:52:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:24,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:24,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:24,457 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:52:24,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 23:52:24,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:24,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-14 23:52:24,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-14 23:52:24,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-14 23:52:24,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:24,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834399852] [2023-02-14 23:52:24,625 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:24,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004258649] [2023-02-14 23:52:24,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004258649] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:52:24,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:52:24,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-14 23:52:24,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105077063] [2023-02-14 23:52:24,625 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:24,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 23:52:24,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:24,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 23:52:24,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-14 23:52:24,626 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 23:52:24,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:24,768 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2023-02-14 23:52:24,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 23:52:24,769 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 65 [2023-02-14 23:52:24,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:24,770 INFO L225 Difference]: With dead ends: 102 [2023-02-14 23:52:24,770 INFO L226 Difference]: Without dead ends: 94 [2023-02-14 23:52:24,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-14 23:52:24,771 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 36 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:24,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 231 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:52:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-14 23:52:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2023-02-14 23:52:24,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 47 states have internal predecessors, (55), 32 states have call successors, (32), 6 states have call predecessors, (32), 6 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-02-14 23:52:24,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2023-02-14 23:52:24,786 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2023-02-14 23:52:24,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:24,786 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2023-02-14 23:52:24,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2023-02-14 23:52:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2023-02-14 23:52:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-14 23:52:24,787 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:24,787 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:24,807 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-14 23:52:24,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:24,992 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:24,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:24,993 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2023-02-14 23:52:24,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:24,993 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670234571] [2023-02-14 23:52:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:24,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:25,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:25,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148392753] [2023-02-14 23:52:25,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:25,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:25,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:25,021 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:52:25,064 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 23:52:25,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:25,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-14 23:52:25,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:25,188 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-14 23:52:25,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-14 23:52:25,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:25,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670234571] [2023-02-14 23:52:25,307 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:25,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148392753] [2023-02-14 23:52:25,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148392753] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:52:25,307 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:52:25,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-02-14 23:52:25,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177092292] [2023-02-14 23:52:25,307 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:25,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 23:52:25,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:25,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 23:52:25,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-14 23:52:25,309 INFO L87 Difference]: Start difference. First operand 85 states and 118 transitions. Second operand has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-14 23:52:25,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:25,614 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2023-02-14 23:52:25,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 23:52:25,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) Word has length 71 [2023-02-14 23:52:25,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:25,616 INFO L225 Difference]: With dead ends: 128 [2023-02-14 23:52:25,617 INFO L226 Difference]: Without dead ends: 124 [2023-02-14 23:52:25,617 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2023-02-14 23:52:25,617 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 48 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:25,618 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 203 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 23:52:25,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-14 23:52:25,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2023-02-14 23:52:25,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 50 states have (on average 1.18) internal successors, (59), 52 states have internal predecessors, (59), 34 states have call successors, (34), 7 states have call predecessors, (34), 7 states have return successors, (33), 32 states have call predecessors, (33), 33 states have call successors, (33) [2023-02-14 23:52:25,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2023-02-14 23:52:25,636 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2023-02-14 23:52:25,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:25,636 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2023-02-14 23:52:25,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (18), 7 states have call predecessors, (18), 7 states have call successors, (18) [2023-02-14 23:52:25,637 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2023-02-14 23:52:25,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-14 23:52:25,637 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:25,637 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:25,655 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:25,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-14 23:52:25,843 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:25,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:25,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2023-02-14 23:52:25,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:25,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692728594] [2023-02-14 23:52:25,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:25,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:25,851 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:25,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019027135] [2023-02-14 23:52:25,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:52:25,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:25,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:25,874 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:52:25,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 23:52:25,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:52:25,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:52:25,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-14 23:52:25,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:26,147 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2023-02-14 23:52:26,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:31,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:31,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692728594] [2023-02-14 23:52:31,363 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:31,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019027135] [2023-02-14 23:52:31,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019027135] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:52:31,363 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:52:31,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-14 23:52:31,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122730657] [2023-02-14 23:52:31,363 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:31,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 23:52:31,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:31,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 23:52:31,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=148, Unknown=2, NotChecked=0, Total=182 [2023-02-14 23:52:31,364 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-14 23:52:33,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-02-14 23:52:33,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:33,672 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2023-02-14 23:52:33,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 23:52:33,673 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) Word has length 76 [2023-02-14 23:52:33,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:33,674 INFO L225 Difference]: With dead ends: 124 [2023-02-14 23:52:33,674 INFO L226 Difference]: Without dead ends: 122 [2023-02-14 23:52:33,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=59, Invalid=245, Unknown=2, NotChecked=0, Total=306 [2023-02-14 23:52:33,675 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 22 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 12 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:33,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 176 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 280 Invalid, 1 Unknown, 0 Unchecked, 2.2s Time] [2023-02-14 23:52:33,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-14 23:52:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2023-02-14 23:52:33,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 66 states have (on average 1.1666666666666667) internal successors, (77), 68 states have internal predecessors, (77), 42 states have call successors, (42), 10 states have call predecessors, (42), 10 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-02-14 23:52:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2023-02-14 23:52:33,693 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 76 [2023-02-14 23:52:33,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:33,693 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2023-02-14 23:52:33,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 5 states have call predecessors, (12), 4 states have call successors, (12) [2023-02-14 23:52:33,693 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2023-02-14 23:52:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-14 23:52:33,694 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:33,694 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:33,713 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-14 23:52:33,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:33,899 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:33,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:33,900 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2023-02-14 23:52:33,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:33,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104783621] [2023-02-14 23:52:33,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:33,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:33,920 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:33,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1286718312] [2023-02-14 23:52:33,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:52:33,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:33,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:33,937 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:52:33,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 23:52:33,992 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 23:52:33,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:52:33,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-14 23:52:33,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-14 23:52:35,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:36,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:36,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104783621] [2023-02-14 23:52:36,204 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:36,204 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286718312] [2023-02-14 23:52:36,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1286718312] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:52:36,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:52:36,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-14 23:52:36,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836964206] [2023-02-14 23:52:36,204 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:36,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-14 23:52:36,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:36,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-14 23:52:36,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2023-02-14 23:52:36,205 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-02-14 23:52:37,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:37,082 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2023-02-14 23:52:37,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-14 23:52:37,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2023-02-14 23:52:37,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:37,084 INFO L225 Difference]: With dead ends: 128 [2023-02-14 23:52:37,084 INFO L226 Difference]: Without dead ends: 126 [2023-02-14 23:52:37,084 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2023-02-14 23:52:37,085 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 48 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:37,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 128 Invalid, 466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-14 23:52:37,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-14 23:52:37,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2023-02-14 23:52:37,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 69 states have (on average 1.1594202898550725) internal successors, (80), 71 states have internal predecessors, (80), 42 states have call successors, (42), 11 states have call predecessors, (42), 11 states have return successors, (41), 40 states have call predecessors, (41), 41 states have call successors, (41) [2023-02-14 23:52:37,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2023-02-14 23:52:37,101 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2023-02-14 23:52:37,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:37,101 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2023-02-14 23:52:37,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-02-14 23:52:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2023-02-14 23:52:37,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-14 23:52:37,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:37,102 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:37,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:37,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 23:52:37,306 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:37,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:37,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2023-02-14 23:52:37,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:37,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325734544] [2023-02-14 23:52:37,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:37,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:37,325 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:37,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [616604063] [2023-02-14 23:52:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:37,327 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:37,327 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:37,328 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:52:37,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 23:52:37,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:37,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-14 23:52:37,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:37,725 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-02-14 23:52:37,725 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:38,281 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-02-14 23:52:38,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:38,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325734544] [2023-02-14 23:52:38,296 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:38,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616604063] [2023-02-14 23:52:38,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616604063] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:52:38,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:52:38,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-14 23:52:38,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24486551] [2023-02-14 23:52:38,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:38,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-14 23:52:38,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:38,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-14 23:52:38,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-14 23:52:38,298 INFO L87 Difference]: Start difference. First operand 123 states and 163 transitions. Second operand has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-14 23:52:46,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:46,734 INFO L93 Difference]: Finished difference Result 208 states and 295 transitions. [2023-02-14 23:52:46,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-14 23:52:46,734 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 87 [2023-02-14 23:52:46,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:46,735 INFO L225 Difference]: With dead ends: 208 [2023-02-14 23:52:46,735 INFO L226 Difference]: Without dead ends: 204 [2023-02-14 23:52:46,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-02-14 23:52:46,736 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 91 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 1288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:46,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 482 Invalid, 1288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-02-14 23:52:46,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-14 23:52:46,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2023-02-14 23:52:46,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 106 states have (on average 1.1981132075471699) internal successors, (127), 107 states have internal predecessors, (127), 79 states have call successors, (79), 14 states have call predecessors, (79), 14 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-02-14 23:52:46,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 284 transitions. [2023-02-14 23:52:46,788 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 284 transitions. Word has length 87 [2023-02-14 23:52:46,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:46,788 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 284 transitions. [2023-02-14 23:52:46,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 18 states have internal predecessors, (37), 10 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2023-02-14 23:52:46,789 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 284 transitions. [2023-02-14 23:52:46,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-14 23:52:46,789 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:46,789 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:46,794 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:46,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 23:52:46,994 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:46,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:46,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1140726838, now seen corresponding path program 4 times [2023-02-14 23:52:46,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:46,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200217735] [2023-02-14 23:52:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:46,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:47,001 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:47,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572059365] [2023-02-14 23:52:47,001 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:52:47,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:47,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:47,002 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:52:47,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 23:52:47,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:52:47,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:52:47,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-14 23:52:47,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:47,083 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-14 23:52:47,084 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 23:52:47,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:47,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200217735] [2023-02-14 23:52:47,084 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:47,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572059365] [2023-02-14 23:52:47,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572059365] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 23:52:47,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 23:52:47,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 23:52:47,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596432434] [2023-02-14 23:52:47,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 23:52:47,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 23:52:47,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:47,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 23:52:47,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-14 23:52:47,086 INFO L87 Difference]: Start difference. First operand 200 states and 284 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-02-14 23:52:47,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:52:47,190 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2023-02-14 23:52:47,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 23:52:47,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 101 [2023-02-14 23:52:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:52:47,191 INFO L225 Difference]: With dead ends: 253 [2023-02-14 23:52:47,191 INFO L226 Difference]: Without dead ends: 181 [2023-02-14 23:52:47,195 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-02-14 23:52:47,195 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 7 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 23:52:47,196 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 145 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 23:52:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-14 23:52:47,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 167. [2023-02-14 23:52:47,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 89 states have (on average 1.146067415730337) internal successors, (102), 90 states have internal predecessors, (102), 63 states have call successors, (63), 14 states have call predecessors, (63), 14 states have return successors, (62), 62 states have call predecessors, (62), 62 states have call successors, (62) [2023-02-14 23:52:47,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2023-02-14 23:52:47,235 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 101 [2023-02-14 23:52:47,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:52:47,236 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2023-02-14 23:52:47,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2023-02-14 23:52:47,236 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2023-02-14 23:52:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-14 23:52:47,237 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:52:47,237 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:52:47,242 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 23:52:47,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-14 23:52:47,442 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:52:47,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:52:47,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2023-02-14 23:52:47,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:52:47,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101066764] [2023-02-14 23:52:47,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:47,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:52:47,449 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:52:47,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [822988276] [2023-02-14 23:52:47,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:52:47,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:52:47,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:52:47,460 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) [2023-02-14 23:52:47,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 23:52:47,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 23:52:47,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-14 23:52:47,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:52:48,056 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 57 proven. 28 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-02-14 23:52:48,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:52:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-02-14 23:52:51,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:52:51,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101066764] [2023-02-14 23:52:51,731 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:52:51,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822988276] [2023-02-14 23:52:51,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822988276] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:52:51,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:52:51,732 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-02-14 23:52:51,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924673587] [2023-02-14 23:52:51,732 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:52:51,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 23:52:51,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:52:51,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 23:52:51,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-02-14 23:52:51,733 INFO L87 Difference]: Start difference. First operand 167 states and 227 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-14 23:52:59,039 WARN L233 SmtUtils]: Spent 5.92s on a formula simplification that was a NOOP. DAG size: 70 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 23:53:08,271 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 [] [2023-02-14 23:53:14,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:53:14,314 INFO L93 Difference]: Finished difference Result 209 states and 287 transitions. [2023-02-14 23:53:14,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 23:53:14,314 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) Word has length 103 [2023-02-14 23:53:14,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:53:14,317 INFO L225 Difference]: With dead ends: 209 [2023-02-14 23:53:14,317 INFO L226 Difference]: Without dead ends: 207 [2023-02-14 23:53:14,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2023-02-14 23:53:14,326 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 101 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 803 mSolverCounterSat, 147 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 803 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-02-14 23:53:14,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 146 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 803 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2023-02-14 23:53:14,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-14 23:53:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 197. [2023-02-14 23:53:14,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 106 states have (on average 1.1415094339622642) internal successors, (121), 108 states have internal predecessors, (121), 75 states have call successors, (75), 15 states have call predecessors, (75), 15 states have return successors, (74), 73 states have call predecessors, (74), 74 states have call successors, (74) [2023-02-14 23:53:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 270 transitions. [2023-02-14 23:53:14,401 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 270 transitions. Word has length 103 [2023-02-14 23:53:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:53:14,401 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 270 transitions. [2023-02-14 23:53:14,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 19 states have internal predecessors, (44), 11 states have call successors, (33), 3 states have call predecessors, (33), 3 states have return successors, (32), 11 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-14 23:53:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 270 transitions. [2023-02-14 23:53:14,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-14 23:53:14,402 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:53:14,402 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:53:14,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-14 23:53:14,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-14 23:53:14,607 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:53:14,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:53:14,608 INFO L85 PathProgramCache]: Analyzing trace with hash -349873392, now seen corresponding path program 2 times [2023-02-14 23:53:14,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:53:14,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615775338] [2023-02-14 23:53:14,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:53:14,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:53:14,619 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:53:14,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [950666579] [2023-02-14 23:53:14,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:53:14,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:53:14,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:53:14,620 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) [2023-02-14 23:53:14,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-14 23:53:14,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:53:14,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:53:14,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-14 23:53:14,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:53:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 51 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-14 23:53:15,139 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:53:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 57 proven. 42 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-02-14 23:53:15,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:53:15,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615775338] [2023-02-14 23:53:15,924 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:53:15,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950666579] [2023-02-14 23:53:15,924 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950666579] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:53:15,924 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:53:15,924 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2023-02-14 23:53:15,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794720742] [2023-02-14 23:53:15,925 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:53:15,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-14 23:53:15,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:53:15,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-14 23:53:15,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-02-14 23:53:15,926 INFO L87 Difference]: Start difference. First operand 197 states and 270 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2023-02-14 23:53:36,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:53:36,469 INFO L93 Difference]: Finished difference Result 278 states and 390 transitions. [2023-02-14 23:53:36,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-14 23:53:36,469 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) Word has length 120 [2023-02-14 23:53:36,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:53:36,471 INFO L225 Difference]: With dead ends: 278 [2023-02-14 23:53:36,471 INFO L226 Difference]: Without dead ends: 276 [2023-02-14 23:53:36,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=459, Invalid=2091, Unknown=0, NotChecked=0, Total=2550 [2023-02-14 23:53:36,472 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 100 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 1357 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2023-02-14 23:53:36,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 265 Invalid, 1552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1357 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2023-02-14 23:53:36,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-02-14 23:53:36,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 244. [2023-02-14 23:53:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 132 states have (on average 1.1515151515151516) internal successors, (152), 136 states have internal predecessors, (152), 93 states have call successors, (93), 18 states have call predecessors, (93), 18 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2023-02-14 23:53:36,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 337 transitions. [2023-02-14 23:53:36,595 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 337 transitions. Word has length 120 [2023-02-14 23:53:36,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:53:36,595 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 337 transitions. [2023-02-14 23:53:36,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 21 states have internal predecessors, (48), 13 states have call successors, (39), 3 states have call predecessors, (39), 3 states have return successors, (38), 13 states have call predecessors, (38), 13 states have call successors, (38) [2023-02-14 23:53:36,595 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 337 transitions. [2023-02-14 23:53:36,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-14 23:53:36,596 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:53:36,596 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:53:36,601 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-14 23:53:36,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:53:36,801 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:53:36,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:53:36,802 INFO L85 PathProgramCache]: Analyzing trace with hash -397785577, now seen corresponding path program 3 times [2023-02-14 23:53:36,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:53:36,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226870970] [2023-02-14 23:53:36,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:53:36,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:53:36,811 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:53:36,811 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723951387] [2023-02-14 23:53:36,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:53:36,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:53:36,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:53:36,812 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) [2023-02-14 23:53:36,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-14 23:53:36,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 23:53:36,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:53:36,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-14 23:53:36,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:53:37,294 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 81 proven. 38 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-14 23:53:37,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:53:37,649 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 67 proven. 29 refuted. 0 times theorem prover too weak. 393 trivial. 0 not checked. [2023-02-14 23:53:37,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:53:37,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226870970] [2023-02-14 23:53:37,649 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:53:37,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723951387] [2023-02-14 23:53:37,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723951387] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:53:37,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:53:37,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 22 [2023-02-14 23:53:37,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916997743] [2023-02-14 23:53:37,649 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:53:37,650 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-14 23:53:37,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:53:37,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-14 23:53:37,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2023-02-14 23:53:37,650 INFO L87 Difference]: Start difference. First operand 244 states and 337 transitions. Second operand has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) [2023-02-14 23:53:39,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:53:39,172 INFO L93 Difference]: Finished difference Result 283 states and 394 transitions. [2023-02-14 23:53:39,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-14 23:53:39,173 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) Word has length 123 [2023-02-14 23:53:39,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:53:39,188 INFO L225 Difference]: With dead ends: 283 [2023-02-14 23:53:39,188 INFO L226 Difference]: Without dead ends: 281 [2023-02-14 23:53:39,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 223 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=877, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 23:53:39,190 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 46 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 1012 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 1076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:53:39,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 260 Invalid, 1076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1012 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-14 23:53:39,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-14 23:53:39,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 248. [2023-02-14 23:53:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 135 states have (on average 1.1481481481481481) internal successors, (155), 139 states have internal predecessors, (155), 93 states have call successors, (93), 19 states have call predecessors, (93), 19 states have return successors, (92), 89 states have call predecessors, (92), 92 states have call successors, (92) [2023-02-14 23:53:39,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 340 transitions. [2023-02-14 23:53:39,334 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 340 transitions. Word has length 123 [2023-02-14 23:53:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:53:39,335 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 340 transitions. [2023-02-14 23:53:39,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.6) internal successors, (52), 19 states have internal predecessors, (52), 11 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (32), 11 states have call predecessors, (32), 9 states have call successors, (32) [2023-02-14 23:53:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 340 transitions. [2023-02-14 23:53:39,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-14 23:53:39,336 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:53:39,336 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:53:39,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-02-14 23:53:39,541 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,SelfDestructingSolverStorable14 [2023-02-14 23:53:39,541 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:53:39,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:53:39,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2023-02-14 23:53:39,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:53:39,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182294339] [2023-02-14 23:53:39,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:53:39,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:53:39,548 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:53:39,549 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545410057] [2023-02-14 23:53:39,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 23:53:39,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:53:39,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:53:39,550 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) [2023-02-14 23:53:39,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-14 23:53:39,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 23:53:39,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:53:39,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-14 23:53:39,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:53:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 113 proven. 94 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2023-02-14 23:53:40,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:53:41,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:53:41,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182294339] [2023-02-14 23:53:41,005 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:53:41,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545410057] [2023-02-14 23:53:41,005 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545410057] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:53:41,005 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:53:41,005 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-14 23:53:41,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398784222] [2023-02-14 23:53:41,005 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 23:53:41,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 23:53:41,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:53:41,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 23:53:41,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2023-02-14 23:53:41,006 INFO L87 Difference]: Start difference. First operand 248 states and 340 transitions. Second operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-14 23:53:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:53:42,243 INFO L93 Difference]: Finished difference Result 304 states and 411 transitions. [2023-02-14 23:53:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-14 23:53:42,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) Word has length 134 [2023-02-14 23:53:42,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:53:42,245 INFO L225 Difference]: With dead ends: 304 [2023-02-14 23:53:42,245 INFO L226 Difference]: Without dead ends: 297 [2023-02-14 23:53:42,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=183, Invalid=1077, Unknown=0, NotChecked=0, Total=1260 [2023-02-14 23:53:42,246 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 54 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-14 23:53:42,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 223 Invalid, 1063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-14 23:53:42,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-02-14 23:53:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 291. [2023-02-14 23:53:42,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 162 states have internal predecessors, (181), 109 states have call successors, (109), 23 states have call predecessors, (109), 23 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-14 23:53:42,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 398 transitions. [2023-02-14 23:53:42,387 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 398 transitions. Word has length 134 [2023-02-14 23:53:42,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:53:42,388 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 398 transitions. [2023-02-14 23:53:42,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 17 states have internal predecessors, (35), 9 states have call successors, (23), 2 states have call predecessors, (23), 3 states have return successors, (22), 7 states have call predecessors, (22), 8 states have call successors, (22) [2023-02-14 23:53:42,388 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 398 transitions. [2023-02-14 23:53:42,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-14 23:53:42,389 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:53:42,389 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:53:42,394 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-02-14 23:53:42,594 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,SelfDestructingSolverStorable15 [2023-02-14 23:53:42,594 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:53:42,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:53:42,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 4 times [2023-02-14 23:53:42,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:53:42,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348099597] [2023-02-14 23:53:42,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:53:42,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:53:42,602 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:53:42,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677483709] [2023-02-14 23:53:42,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:53:42,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:53:42,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:53:42,603 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) [2023-02-14 23:53:42,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-14 23:53:42,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:53:42,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:53:42,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-14 23:53:42,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:53:44,085 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 97 proven. 82 refuted. 0 times theorem prover too weak. 666 trivial. 0 not checked. [2023-02-14 23:53:44,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:53:44,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:53:44,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348099597] [2023-02-14 23:53:44,500 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:53:44,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677483709] [2023-02-14 23:53:44,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677483709] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:53:44,500 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:53:44,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-14 23:53:44,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423935540] [2023-02-14 23:53:44,502 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 23:53:44,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 23:53:44,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:53:44,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 23:53:44,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2023-02-14 23:53:44,503 INFO L87 Difference]: Start difference. First operand 291 states and 398 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2023-02-14 23:53:46,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:53:46,562 INFO L93 Difference]: Finished difference Result 309 states and 414 transitions. [2023-02-14 23:53:46,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 23:53:46,562 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 150 [2023-02-14 23:53:46,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:53:46,571 INFO L225 Difference]: With dead ends: 309 [2023-02-14 23:53:46,571 INFO L226 Difference]: Without dead ends: 307 [2023-02-14 23:53:46,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=187, Invalid=1003, Unknown=0, NotChecked=0, Total=1190 [2023-02-14 23:53:46,572 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 66 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1075 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 1123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-14 23:53:46,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 230 Invalid, 1123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1075 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-14 23:53:46,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-02-14 23:53:46,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 299. [2023-02-14 23:53:46,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 164 states have (on average 1.1402439024390243) internal successors, (187), 168 states have internal predecessors, (187), 109 states have call successors, (109), 25 states have call predecessors, (109), 25 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-14 23:53:46,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 404 transitions. [2023-02-14 23:53:46,732 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 404 transitions. Word has length 150 [2023-02-14 23:53:46,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:53:46,733 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 404 transitions. [2023-02-14 23:53:46,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 16 states have internal predecessors, (36), 10 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2023-02-14 23:53:46,733 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 404 transitions. [2023-02-14 23:53:46,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-02-14 23:53:46,734 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:53:46,734 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:53:46,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-02-14 23:53:46,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-14 23:53:46,940 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:53:46,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:53:46,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1812352379, now seen corresponding path program 3 times [2023-02-14 23:53:46,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:53:46,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582439110] [2023-02-14 23:53:46,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:53:46,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:53:46,947 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:53:46,947 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682044569] [2023-02-14 23:53:46,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 23:53:46,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:53:46,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:53:46,951 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) [2023-02-14 23:53:46,973 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-14 23:53:47,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-14 23:53:47,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:53:47,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-14 23:53:47,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:53:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 87 proven. 28 refuted. 0 times theorem prover too weak. 807 trivial. 0 not checked. [2023-02-14 23:53:47,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:53:49,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:53:49,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582439110] [2023-02-14 23:53:49,598 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:53:49,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682044569] [2023-02-14 23:53:49,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682044569] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-14 23:53:49,599 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-14 23:53:49,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-02-14 23:53:49,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690201981] [2023-02-14 23:53:49,599 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-14 23:53:49,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-14 23:53:49,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:53:49,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-14 23:53:49,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=225, Unknown=1, NotChecked=0, Total=272 [2023-02-14 23:53:49,600 INFO L87 Difference]: Start difference. First operand 299 states and 404 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-14 23:53:49,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:53:49,979 INFO L93 Difference]: Finished difference Result 344 states and 466 transitions. [2023-02-14 23:53:49,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-14 23:53:49,979 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 153 [2023-02-14 23:53:49,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:53:49,980 INFO L225 Difference]: With dead ends: 344 [2023-02-14 23:53:49,981 INFO L226 Difference]: Without dead ends: 337 [2023-02-14 23:53:49,981 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=75, Invalid=344, Unknown=1, NotChecked=0, Total=420 [2023-02-14 23:53:49,982 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 23:53:49,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 174 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 23:53:49,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-02-14 23:53:50,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 319. [2023-02-14 23:53:50,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 174 states have (on average 1.1379310344827587) internal successors, (198), 178 states have internal predecessors, (198), 117 states have call successors, (117), 27 states have call predecessors, (117), 27 states have return successors, (116), 113 states have call predecessors, (116), 116 states have call successors, (116) [2023-02-14 23:53:50,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 431 transitions. [2023-02-14 23:53:50,156 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 431 transitions. Word has length 153 [2023-02-14 23:53:50,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:53:50,156 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 431 transitions. [2023-02-14 23:53:50,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-14 23:53:50,156 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 431 transitions. [2023-02-14 23:53:50,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-14 23:53:50,157 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:53:50,158 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:53:50,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-14 23:53:50,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-14 23:53:50,362 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:53:50,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:53:50,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2018058068, now seen corresponding path program 4 times [2023-02-14 23:53:50,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:53:50,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235169395] [2023-02-14 23:53:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:53:50,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:53:50,376 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:53:50,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165212517] [2023-02-14 23:53:50,376 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 23:53:50,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:53:50,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:53:50,379 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) [2023-02-14 23:53:50,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-14 23:53:50,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 23:53:50,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:53:50,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 74 conjunts are in the unsatisfiable core [2023-02-14 23:53:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:53:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 46 proven. 85 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2023-02-14 23:53:51,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:53:53,448 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2023-02-14 23:53:53,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:53:53,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235169395] [2023-02-14 23:53:53,448 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:53:53,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165212517] [2023-02-14 23:53:53,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165212517] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:53:53,449 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:53:53,449 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2023-02-14 23:53:53,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230066777] [2023-02-14 23:53:53,449 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:53:53,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-14 23:53:53,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:53:53,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-14 23:53:53,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2023-02-14 23:53:53,452 INFO L87 Difference]: Start difference. First operand 319 states and 431 transitions. Second operand has 30 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2023-02-14 23:54:35,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:54:35,004 INFO L93 Difference]: Finished difference Result 501 states and 720 transitions. [2023-02-14 23:54:35,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-14 23:54:35,004 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) Word has length 156 [2023-02-14 23:54:35,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:54:35,006 INFO L225 Difference]: With dead ends: 501 [2023-02-14 23:54:35,006 INFO L226 Difference]: Without dead ends: 493 [2023-02-14 23:54:35,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 282 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1321 ImplicationChecksByTransitivity, 25.0s TimeCoverageRelationStatistics Valid=1063, Invalid=4789, Unknown=0, NotChecked=0, Total=5852 [2023-02-14 23:54:35,007 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 186 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 2980 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 3342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 2980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2023-02-14 23:54:35,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [194 Valid, 943 Invalid, 3342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 2980 Invalid, 0 Unknown, 0 Unchecked, 17.9s Time] [2023-02-14 23:54:35,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2023-02-14 23:54:35,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 451. [2023-02-14 23:54:35,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 232 states have (on average 1.1724137931034482) internal successors, (272), 238 states have internal predecessors, (272), 188 states have call successors, (188), 30 states have call predecessors, (188), 30 states have return successors, (187), 182 states have call predecessors, (187), 187 states have call successors, (187) [2023-02-14 23:54:35,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 647 transitions. [2023-02-14 23:54:35,344 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 647 transitions. Word has length 156 [2023-02-14 23:54:35,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:54:35,345 INFO L495 AbstractCegarLoop]: Abstraction has 451 states and 647 transitions. [2023-02-14 23:54:35,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.037037037037037) internal successors, (55), 26 states have internal predecessors, (55), 17 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (51), 15 states have call predecessors, (51), 15 states have call successors, (51) [2023-02-14 23:54:35,345 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 647 transitions. [2023-02-14 23:54:35,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-02-14 23:54:35,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:54:35,346 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:54:35,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-14 23:54:35,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:54:35,551 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:54:35,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:54:35,552 INFO L85 PathProgramCache]: Analyzing trace with hash 1664660918, now seen corresponding path program 5 times [2023-02-14 23:54:35,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:54:35,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976628723] [2023-02-14 23:54:35,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:54:35,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:54:35,558 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:54:35,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1766696974] [2023-02-14 23:54:35,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 23:54:35,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:54:35,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:54:35,560 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) [2023-02-14 23:54:35,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-14 23:54:35,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-14 23:54:35,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:54:35,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-14 23:54:35,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:54:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2023-02-14 23:54:36,271 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:54:41,621 INFO L134 CoverageAnalysis]: Checked inductivity of 927 backedges. 40 proven. 67 refuted. 0 times theorem prover too weak. 820 trivial. 0 not checked. [2023-02-14 23:54:41,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:54:41,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976628723] [2023-02-14 23:54:41,622 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:54:41,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766696974] [2023-02-14 23:54:41,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766696974] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:54:41,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:54:41,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2023-02-14 23:54:41,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603613945] [2023-02-14 23:54:41,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:54:41,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-14 23:54:41,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:54:41,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-14 23:54:41,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=551, Unknown=0, NotChecked=0, Total=650 [2023-02-14 23:54:41,624 INFO L87 Difference]: Start difference. First operand 451 states and 647 transitions. Second operand has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 15 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 13 states have call predecessors, (48), 13 states have call successors, (48) [2023-02-14 23:54:46,023 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:55:15,219 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:55:25,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:55:27,187 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:55:37,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 23:55:37,489 INFO L93 Difference]: Finished difference Result 661 states and 977 transitions. [2023-02-14 23:55:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-14 23:55:37,490 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 15 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 13 states have call predecessors, (48), 13 states have call successors, (48) Word has length 156 [2023-02-14 23:55:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 23:55:37,492 INFO L225 Difference]: With dead ends: 661 [2023-02-14 23:55:37,493 INFO L226 Difference]: Without dead ends: 652 [2023-02-14 23:55:37,494 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1482 ImplicationChecksByTransitivity, 22.6s TimeCoverageRelationStatistics Valid=1025, Invalid=4981, Unknown=0, NotChecked=0, Total=6006 [2023-02-14 23:55:37,495 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 151 mSDsluCounter, 728 mSDsCounter, 0 mSdLazyCounter, 2386 mSolverCounterSat, 407 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 36.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 2794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 2386 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.3s IncrementalHoareTripleChecker+Time [2023-02-14 23:55:37,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 864 Invalid, 2794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 2386 Invalid, 1 Unknown, 0 Unchecked, 36.3s Time] [2023-02-14 23:55:37,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2023-02-14 23:55:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 599. [2023-02-14 23:55:38,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 299 states have (on average 1.1806020066889633) internal successors, (353), 303 states have internal predecessors, (353), 265 states have call successors, (265), 34 states have call predecessors, (265), 34 states have return successors, (264), 261 states have call predecessors, (264), 264 states have call successors, (264) [2023-02-14 23:55:38,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 882 transitions. [2023-02-14 23:55:38,035 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 882 transitions. Word has length 156 [2023-02-14 23:55:38,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 23:55:38,035 INFO L495 AbstractCegarLoop]: Abstraction has 599 states and 882 transitions. [2023-02-14 23:55:38,035 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 15 states have call successors, (50), 3 states have call predecessors, (50), 1 states have return successors, (48), 13 states have call predecessors, (48), 13 states have call successors, (48) [2023-02-14 23:55:38,035 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 882 transitions. [2023-02-14 23:55:38,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2023-02-14 23:55:38,037 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 23:55:38,037 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 23:55:38,044 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-14 23:55:38,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:38,242 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 23:55:38,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 23:55:38,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1404546792, now seen corresponding path program 5 times [2023-02-14 23:55:38,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 23:55:38,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039915120] [2023-02-14 23:55:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 23:55:38,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 23:55:38,250 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 23:55:38,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [335895445] [2023-02-14 23:55:38,251 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 23:55:38,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 23:55:38,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 23:55:38,252 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 23:55:38,264 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-14 23:55:38,367 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2023-02-14 23:55:38,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 23:55:38,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 83 conjunts are in the unsatisfiable core [2023-02-14 23:55:38,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 23:55:40,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 114 proven. 105 refuted. 0 times theorem prover too weak. 991 trivial. 0 not checked. [2023-02-14 23:55:40,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 23:55:55,844 INFO L134 CoverageAnalysis]: Checked inductivity of 1210 backedges. 111 proven. 88 refuted. 5 times theorem prover too weak. 1006 trivial. 0 not checked. [2023-02-14 23:55:55,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 23:55:55,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039915120] [2023-02-14 23:55:55,845 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 23:55:55,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335895445] [2023-02-14 23:55:55,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335895445] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 23:55:55,845 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 23:55:55,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 32 [2023-02-14 23:55:55,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147851567] [2023-02-14 23:55:55,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 23:55:55,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-14 23:55:55,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 23:55:55,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-14 23:55:55,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=798, Unknown=4, NotChecked=0, Total=992 [2023-02-14 23:55:55,847 INFO L87 Difference]: Start difference. First operand 599 states and 882 transitions. Second operand has 32 states, 31 states have (on average 2.0) internal successors, (62), 29 states have internal predecessors, (62), 17 states have call successors, (58), 3 states have call predecessors, (58), 3 states have return successors, (57), 17 states have call predecessors, (57), 16 states have call successors, (57) [2023-02-14 23:55:58,008 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:56:06,920 WARN L233 SmtUtils]: Spent 6.25s on a formula simplification that was a NOOP. DAG size: 163 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 23:56:13,111 WARN L233 SmtUtils]: Spent 5.29s on a formula simplification that was a NOOP. DAG size: 120 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 23:56:15,206 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:56:43,579 WARN L233 SmtUtils]: Spent 28.11s on a formula simplification that was a NOOP. DAG size: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-02-14 23:56:45,597 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:56:51,815 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:56:53,832 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 23:57:02,708 WARN L233 SmtUtils]: Spent 8.33s on a formula simplification that was a NOOP. DAG size: 77 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)