./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 26d01a9c Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.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 fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 01:44:19,872 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 01:44:19,873 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 01:44:19,895 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 01:44:19,895 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 01:44:19,896 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 01:44:19,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 01:44:19,899 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 01:44:19,900 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 01:44:19,901 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 01:44:19,902 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 01:44:19,903 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 01:44:19,903 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 01:44:19,904 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 01:44:19,905 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 01:44:19,906 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 01:44:19,906 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 01:44:19,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 01:44:19,908 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 01:44:19,910 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 01:44:19,911 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 01:44:19,912 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 01:44:19,913 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 01:44:19,914 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 01:44:19,917 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 01:44:19,917 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 01:44:19,917 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 01:44:19,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 01:44:19,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 01:44:19,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 01:44:19,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 01:44:19,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 01:44:19,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 01:44:19,921 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 01:44:19,922 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 01:44:19,922 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 01:44:19,923 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 01:44:19,923 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 01:44:19,923 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 01:44:19,924 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 01:44:19,927 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 01:44:19,928 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 01:44:19,950 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 01:44:19,950 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 01:44:19,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 01:44:19,951 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 01:44:19,952 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 01:44:19,952 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 01:44:19,952 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 01:44:19,953 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 01:44:19,953 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 01:44:19,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 01:44:19,953 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 01:44:19,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 01:44:19,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 01:44:19,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 01:44:19,954 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 01:44:19,954 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 01:44:19,954 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 01:44:19,955 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 01:44:19,955 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 01:44:19,955 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 01:44:19,955 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 01:44:19,955 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 01:44:19,956 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 01:44:19,956 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 01:44:19,956 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:44:19,956 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 01:44:19,957 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 01:44:19,957 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 01:44:19,957 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 01:44:19,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 01:44:19,957 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 01:44:19,958 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 01:44:19,958 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 01:44:19,958 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 01:44:19,958 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 01:44:19,958 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fc71ae13b1bed24e074eb2de07c8f2064aa903343708c3aabf1b928078c9e7f6 [2023-02-17 01:44:20,181 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 01:44:20,210 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 01:44:20,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 01:44:20,214 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 01:44:20,214 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 01:44:20,215 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2023-02-17 01:44:21,337 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 01:44:21,521 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 01:44:21,522 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound50.c [2023-02-17 01:44:21,530 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79bd8d043/056d6f5ebd634b50ae028d5a0d10bac8/FLAGa8f3fe35d [2023-02-17 01:44:21,546 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79bd8d043/056d6f5ebd634b50ae028d5a0d10bac8 [2023-02-17 01:44:21,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 01:44:21,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 01:44:21,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 01:44:21,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 01:44:21,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 01:44:21,556 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:44:21" (1/1) ... [2023-02-17 01:44:21,558 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6590c010 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21, skipping insertion in model container [2023-02-17 01:44:21,558 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:44:21" (1/1) ... [2023-02-17 01:44:21,565 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 01:44:21,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 01:44:21,728 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_valuebound50.c[490,503] [2023-02-17 01:44:21,762 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:44:21,773 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 01:44:21,785 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_valuebound50.c[490,503] [2023-02-17 01:44:21,807 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:44:21,818 INFO L208 MainTranslator]: Completed translation [2023-02-17 01:44:21,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21 WrapperNode [2023-02-17 01:44:21,819 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 01:44:21,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 01:44:21,821 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 01:44:21,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 01:44:21,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21" (1/1) ... [2023-02-17 01:44:21,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21" (1/1) ... [2023-02-17 01:44:21,862 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-02-17 01:44:21,863 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 01:44:21,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 01:44:21,864 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 01:44:21,864 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 01:44:21,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21" (1/1) ... [2023-02-17 01:44:21,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21" (1/1) ... [2023-02-17 01:44:21,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21" (1/1) ... [2023-02-17 01:44:21,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21" (1/1) ... [2023-02-17 01:44:21,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21" (1/1) ... [2023-02-17 01:44:21,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21" (1/1) ... [2023-02-17 01:44:21,897 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21" (1/1) ... [2023-02-17 01:44:21,898 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21" (1/1) ... [2023-02-17 01:44:21,899 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 01:44:21,901 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 01:44:21,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 01:44:21,902 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 01:44:21,903 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21" (1/1) ... [2023-02-17 01:44:21,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:44:21,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:21,934 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-17 01:44:21,947 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-17 01:44:21,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 01:44:21,980 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-17 01:44:21,981 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-17 01:44:21,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 01:44:21,981 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 01:44:21,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 01:44:21,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 01:44:21,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 01:44:22,026 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 01:44:22,028 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 01:44:22,216 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 01:44:22,220 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 01:44:22,221 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 01:44:22,222 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:44:22 BoogieIcfgContainer [2023-02-17 01:44:22,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 01:44:22,224 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 01:44:22,224 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 01:44:22,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 01:44:22,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 01:44:21" (1/3) ... [2023-02-17 01:44:22,227 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdaeb00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:44:22, skipping insertion in model container [2023-02-17 01:44:22,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:21" (2/3) ... [2023-02-17 01:44:22,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdaeb00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:44:22, skipping insertion in model container [2023-02-17 01:44:22,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:44:22" (3/3) ... [2023-02-17 01:44:22,229 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound50.c [2023-02-17 01:44:22,258 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 01:44:22,259 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 01:44:22,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 01:44:22,322 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;@75e2707, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 01:44:22,322 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 01:44:22,327 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) [2023-02-17 01:44:22,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 01:44:22,334 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:22,335 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] [2023-02-17 01:44:22,335 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:22,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:22,340 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2023-02-17 01:44:22,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:22,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932683666] [2023-02-17 01:44:22,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:22,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:22,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:22,488 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932683666] [2023-02-17 01:44:22,489 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 01:44:22,489 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879106091] [2023-02-17 01:44:22,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:22,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:22,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:22,493 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:44:22,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-17 01:44:22,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:22,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 01:44:22,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2023-02-17 01:44:22,633 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:44:22,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879106091] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:44:22,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:44:22,634 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 01:44:22,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750303588] [2023-02-17 01:44:22,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:44:22,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 01:44:22,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:22,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 01:44:22,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 01:44:22,677 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) [2023-02-17 01:44:22,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:22,705 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2023-02-17 01:44:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 01:44:22,707 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 [2023-02-17 01:44:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:22,716 INFO L225 Difference]: With dead ends: 67 [2023-02-17 01:44:22,716 INFO L226 Difference]: Without dead ends: 31 [2023-02-17 01:44:22,720 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 [2023-02-17 01:44:22,724 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 [2023-02-17 01:44:22,725 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] [2023-02-17 01:44:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-17 01:44:22,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-17 01:44:22,760 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) [2023-02-17 01:44:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-02-17 01:44:22,764 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2023-02-17 01:44:22,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:22,764 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-02-17 01:44:22,765 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) [2023-02-17 01:44:22,765 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-02-17 01:44:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 01:44:22,767 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:22,767 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] [2023-02-17 01:44:22,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-17 01:44:22,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-17 01:44:22,974 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:22,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:22,974 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2023-02-17 01:44:22,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:22,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385960937] [2023-02-17 01:44:22,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:22,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:23,000 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:23,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1479630934] [2023-02-17 01:44:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:23,006 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:23,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:23,007 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:44:23,011 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-17 01:44:23,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:23,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 01:44:23,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:23,156 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-17 01:44:23,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-17 01:44:23,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:23,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385960937] [2023-02-17 01:44:23,244 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:23,245 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479630934] [2023-02-17 01:44:23,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479630934] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:44:23,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:44:23,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-17 01:44:23,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435644035] [2023-02-17 01:44:23,246 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:23,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 01:44:23,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 01:44:23,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 01:44:23,248 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) [2023-02-17 01:44:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:23,386 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2023-02-17 01:44:23,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:44:23,387 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 [2023-02-17 01:44:23,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:23,389 INFO L225 Difference]: With dead ends: 48 [2023-02-17 01:44:23,390 INFO L226 Difference]: Without dead ends: 40 [2023-02-17 01:44:23,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:44:23,391 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:44:23,393 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:44:23,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-17 01:44:23,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-17 01:44:23,401 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) [2023-02-17 01:44:23,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-02-17 01:44:23,402 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2023-02-17 01:44:23,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:23,403 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-02-17 01:44:23,403 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) [2023-02-17 01:44:23,403 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-02-17 01:44:23,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 01:44:23,404 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:23,404 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] [2023-02-17 01:44:23,410 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-17 01:44:23,610 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 [2023-02-17 01:44:23,611 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:23,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:23,611 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2023-02-17 01:44:23,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:23,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102863610] [2023-02-17 01:44:23,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:23,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:23,639 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:23,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113685740] [2023-02-17 01:44:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:23,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:23,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:23,641 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:44:23,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-17 01:44:23,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:23,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 01:44:23,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2023-02-17 01:44:23,760 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:23,798 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-17 01:44:23,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:23,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102863610] [2023-02-17 01:44:23,799 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:23,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113685740] [2023-02-17 01:44:23,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113685740] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 01:44:23,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:44:23,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-17 01:44:23,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702936935] [2023-02-17 01:44:23,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:44:23,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:44:23,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:23,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:44:23,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-17 01:44:23,802 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) [2023-02-17 01:44:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:23,861 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-02-17 01:44:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:44:23,861 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 [2023-02-17 01:44:23,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:23,862 INFO L225 Difference]: With dead ends: 39 [2023-02-17 01:44:23,863 INFO L226 Difference]: Without dead ends: 37 [2023-02-17 01:44:23,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-17 01:44:23,864 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 [2023-02-17 01:44:23,865 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] [2023-02-17 01:44:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-17 01:44:23,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-17 01:44:23,877 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) [2023-02-17 01:44:23,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-02-17 01:44:23,878 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2023-02-17 01:44:23,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:23,879 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-02-17 01:44:23,879 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) [2023-02-17 01:44:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-02-17 01:44:23,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 01:44:23,880 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:23,882 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] [2023-02-17 01:44:23,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-17 01:44:24,083 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 [2023-02-17 01:44:24,083 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2023-02-17 01:44:24,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:24,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336556198] [2023-02-17 01:44:24,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:24,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:24,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:24,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [353314858] [2023-02-17 01:44:24,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:24,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:24,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:24,100 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:44:24,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-17 01:44:24,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:24,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 01:44:24,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 10 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-02-17 01:44:24,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:24,284 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2023-02-17 01:44:24,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:24,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336556198] [2023-02-17 01:44:24,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:24,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353314858] [2023-02-17 01:44:24,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353314858] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 01:44:24,286 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:44:24,286 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-17 01:44:24,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712252154] [2023-02-17 01:44:24,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:44:24,287 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:44:24,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:44:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-17 01:44:24,288 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) [2023-02-17 01:44:24,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:24,333 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-02-17 01:44:24,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:44:24,333 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 [2023-02-17 01:44:24,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:24,334 INFO L225 Difference]: With dead ends: 50 [2023-02-17 01:44:24,335 INFO L226 Difference]: Without dead ends: 48 [2023-02-17 01:44:24,335 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 [2023-02-17 01:44:24,336 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 [2023-02-17 01:44:24,336 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] [2023-02-17 01:44:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-17 01:44:24,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-17 01:44:24,345 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) [2023-02-17 01:44:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-02-17 01:44:24,347 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2023-02-17 01:44:24,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:24,347 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-02-17 01:44:24,347 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) [2023-02-17 01:44:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-02-17 01:44:24,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 01:44:24,349 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:24,349 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] [2023-02-17 01:44:24,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-17 01:44:24,553 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 [2023-02-17 01:44:24,554 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:24,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:24,555 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2023-02-17 01:44:24,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:24,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265582019] [2023-02-17 01:44:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:24,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:24,567 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:24,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1033680810] [2023-02-17 01:44:24,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:24,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:24,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:24,570 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:44:24,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-17 01:44:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:24,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 01:44:24,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:24,669 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2023-02-17 01:44:24,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:24,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:24,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265582019] [2023-02-17 01:44:24,695 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:24,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033680810] [2023-02-17 01:44:24,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033680810] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:44:24,695 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:44:24,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-17 01:44:24,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252034504] [2023-02-17 01:44:24,696 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:24,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 01:44:24,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:24,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 01:44:24,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:44:24,697 INFO L87 Difference]: Start difference. First operand 47 states and 61 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-17 01:44:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:24,806 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-02-17 01:44:24,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 01:44:24,806 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 51 [2023-02-17 01:44:24,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:24,807 INFO L225 Difference]: With dead ends: 54 [2023-02-17 01:44:24,808 INFO L226 Difference]: Without dead ends: 52 [2023-02-17 01:44:24,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-02-17 01:44:24,809 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:44:24,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 145 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:44:24,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-17 01:44:24,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-17 01:44:24,818 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) [2023-02-17 01:44:24,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-02-17 01:44:24,823 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2023-02-17 01:44:24,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:24,824 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-02-17 01:44:24,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-02-17 01:44:24,825 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-02-17 01:44:24,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-17 01:44:24,827 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:24,827 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] [2023-02-17 01:44:24,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-17 01:44:25,033 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 [2023-02-17 01:44:25,034 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:25,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:25,034 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2023-02-17 01:44:25,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:25,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048222295] [2023-02-17 01:44:25,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:25,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:25,047 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:25,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [909341344] [2023-02-17 01:44:25,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:25,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:25,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:25,049 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:44:25,051 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-17 01:44:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:25,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 01:44:25,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:25,222 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-02-17 01:44:25,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:25,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:25,277 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048222295] [2023-02-17 01:44:25,277 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:25,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909341344] [2023-02-17 01:44:25,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909341344] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:44:25,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:44:25,278 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-17 01:44:25,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790672] [2023-02-17 01:44:25,279 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:25,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 01:44:25,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:25,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 01:44:25,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-17 01:44:25,280 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) [2023-02-17 01:44:25,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:25,488 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2023-02-17 01:44:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 01:44:25,489 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 [2023-02-17 01:44:25,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:25,491 INFO L225 Difference]: With dead ends: 60 [2023-02-17 01:44:25,491 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 01:44:25,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-02-17 01:44:25,493 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:44:25,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 120 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 01:44:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 01:44:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2023-02-17 01:44:25,511 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) [2023-02-17 01:44:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2023-02-17 01:44:25,512 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2023-02-17 01:44:25,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:25,513 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2023-02-17 01:44:25,513 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) [2023-02-17 01:44:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2023-02-17 01:44:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-17 01:44:25,514 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:25,515 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] [2023-02-17 01:44:25,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-17 01:44:25,720 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 [2023-02-17 01:44:25,721 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:25,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:25,722 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2023-02-17 01:44:25,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:25,722 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939099295] [2023-02-17 01:44:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:25,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:25,735 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:25,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [64793060] [2023-02-17 01:44:25,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:25,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:25,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:25,737 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:44:25,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-17 01:44:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:25,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 01:44:25,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:25,846 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-17 01:44:25,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:25,901 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2023-02-17 01:44:25,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939099295] [2023-02-17 01:44:25,902 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:25,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64793060] [2023-02-17 01:44:25,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64793060] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:44:25,902 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:44:25,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-17 01:44:25,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393725606] [2023-02-17 01:44:25,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:25,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 01:44:25,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:25,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 01:44:25,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:44:25,908 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) [2023-02-17 01:44:26,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:26,076 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2023-02-17 01:44:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 01:44:26,077 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 [2023-02-17 01:44:26,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:26,079 INFO L225 Difference]: With dead ends: 102 [2023-02-17 01:44:26,080 INFO L226 Difference]: Without dead ends: 94 [2023-02-17 01:44:26,080 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 [2023-02-17 01:44:26,082 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 [2023-02-17 01:44:26,082 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] [2023-02-17 01:44:26,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-17 01:44:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2023-02-17 01:44:26,111 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) [2023-02-17 01:44:26,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2023-02-17 01:44:26,113 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2023-02-17 01:44:26,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:26,114 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2023-02-17 01:44:26,114 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) [2023-02-17 01:44:26,114 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2023-02-17 01:44:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-17 01:44:26,120 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:26,120 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] [2023-02-17 01:44:26,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-02-17 01:44:26,326 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 [2023-02-17 01:44:26,326 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:26,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:26,326 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2023-02-17 01:44:26,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:26,327 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005893634] [2023-02-17 01:44:26,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:26,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:26,346 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:26,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1848621166] [2023-02-17 01:44:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:26,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:26,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:26,370 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:44:26,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-17 01:44:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:26,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 01:44:26,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:26,479 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 23 proven. 10 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-02-17 01:44:26,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2023-02-17 01:44:26,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:26,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005893634] [2023-02-17 01:44:26,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:26,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848621166] [2023-02-17 01:44:26,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848621166] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:44:26,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:44:26,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-02-17 01:44:26,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547684815] [2023-02-17 01:44:26,540 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:26,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 01:44:26,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:26,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 01:44:26,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-17 01:44:26,547 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) [2023-02-17 01:44:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:26,960 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2023-02-17 01:44:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 01:44:26,960 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 [2023-02-17 01:44:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:26,963 INFO L225 Difference]: With dead ends: 128 [2023-02-17 01:44:26,963 INFO L226 Difference]: Without dead ends: 124 [2023-02-17 01:44:26,963 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 [2023-02-17 01:44:26,964 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 46 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:44:26,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 232 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 01:44:26,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-17 01:44:26,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2023-02-17 01:44:26,989 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) [2023-02-17 01:44:26,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2023-02-17 01:44:26,991 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2023-02-17 01:44:26,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:26,991 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2023-02-17 01:44:26,992 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) [2023-02-17 01:44:26,992 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2023-02-17 01:44:26,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-17 01:44:26,994 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:26,994 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] [2023-02-17 01:44:27,002 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-17 01:44:27,200 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 [2023-02-17 01:44:27,200 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:27,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:27,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2023-02-17 01:44:27,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:27,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1249677390] [2023-02-17 01:44:27,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:27,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:27,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:27,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510599014] [2023-02-17 01:44:27,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:44:27,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:27,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:27,229 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:44:27,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-17 01:44:27,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:44:27,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:44:27,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-17 01:44:27,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:27,467 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 19 proven. 38 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2023-02-17 01:44:27,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:27,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:27,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1249677390] [2023-02-17 01:44:27,757 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:27,758 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510599014] [2023-02-17 01:44:27,758 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510599014] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:44:27,758 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:44:27,758 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-17 01:44:27,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093670952] [2023-02-17 01:44:27,758 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:27,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 01:44:27,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:27,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 01:44:27,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-02-17 01:44:27,759 INFO L87 Difference]: Start difference. First operand 92 states and 126 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-17 01:44:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:28,371 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2023-02-17 01:44:28,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 01:44:28,371 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) Word has length 76 [2023-02-17 01:44:28,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:28,373 INFO L225 Difference]: With dead ends: 124 [2023-02-17 01:44:28,373 INFO L226 Difference]: Without dead ends: 122 [2023-02-17 01:44:28,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-02-17 01:44:28,374 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 35 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 01:44:28,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 141 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 01:44:28,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-17 01:44:28,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2023-02-17 01:44:28,397 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) [2023-02-17 01:44:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2023-02-17 01:44:28,399 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 76 [2023-02-17 01:44:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:28,399 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2023-02-17 01:44:28,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 13 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (12), 5 states have call predecessors, (12), 6 states have call successors, (12) [2023-02-17 01:44:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2023-02-17 01:44:28,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-17 01:44:28,400 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:28,400 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] [2023-02-17 01:44:28,409 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-17 01:44:28,605 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 [2023-02-17 01:44:28,605 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:28,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:28,605 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2023-02-17 01:44:28,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:28,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749670118] [2023-02-17 01:44:28,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:28,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:28,623 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:28,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291550271] [2023-02-17 01:44:28,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:44:28,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:28,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:28,626 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:44:28,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-17 01:44:28,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 01:44:28,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:44:28,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-17 01:44:28,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 43 proven. 20 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2023-02-17 01:44:29,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:29,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:29,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749670118] [2023-02-17 01:44:29,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:29,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291550271] [2023-02-17 01:44:29,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291550271] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:44:29,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:44:29,760 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-17 01:44:29,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362879424] [2023-02-17 01:44:29,760 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:29,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 01:44:29,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:29,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 01:44:29,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2023-02-17 01:44:29,761 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) [2023-02-17 01:44:30,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:30,624 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2023-02-17 01:44:30,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-17 01:44:30,625 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 [2023-02-17 01:44:30,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:30,626 INFO L225 Difference]: With dead ends: 128 [2023-02-17 01:44:30,626 INFO L226 Difference]: Without dead ends: 126 [2023-02-17 01:44:30,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2023-02-17 01:44:30,627 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 36 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-17 01:44:30,627 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 136 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-17 01:44:30,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-17 01:44:30,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2023-02-17 01:44:30,647 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) [2023-02-17 01:44:30,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2023-02-17 01:44:30,649 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2023-02-17 01:44:30,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:30,649 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2023-02-17 01:44:30,649 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) [2023-02-17 01:44:30,650 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2023-02-17 01:44:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-17 01:44:30,650 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:30,651 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] [2023-02-17 01:44:30,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-17 01:44:30,856 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 [2023-02-17 01:44:30,857 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:30,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:30,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2023-02-17 01:44:30,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:30,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355137302] [2023-02-17 01:44:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:30,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:30,868 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:30,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [270190070] [2023-02-17 01:44:30,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:30,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:30,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:30,870 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:44:30,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-17 01:44:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:30,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-17 01:44:30,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 22 proven. 17 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-02-17 01:44:31,037 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:31,663 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-02-17 01:44:31,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:31,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355137302] [2023-02-17 01:44:31,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:31,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270190070] [2023-02-17 01:44:31,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270190070] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:44:31,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:44:31,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-17 01:44:31,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961192623] [2023-02-17 01:44:31,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:31,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 01:44:31,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:31,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 01:44:31,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-17 01:44:31,666 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) [2023-02-17 01:44:39,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:39,481 INFO L93 Difference]: Finished difference Result 208 states and 295 transitions. [2023-02-17 01:44:39,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-17 01:44:39,481 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 [2023-02-17 01:44:39,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:39,482 INFO L225 Difference]: With dead ends: 208 [2023-02-17 01:44:39,482 INFO L226 Difference]: Without dead ends: 204 [2023-02-17 01:44:39,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 01:44:39,485 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 94 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 203 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 203 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-02-17 01:44:39,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 343 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [203 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-02-17 01:44:39,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-17 01:44:39,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2023-02-17 01:44:39,542 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) [2023-02-17 01:44:39,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 284 transitions. [2023-02-17 01:44:39,544 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 284 transitions. Word has length 87 [2023-02-17 01:44:39,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:39,544 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 284 transitions. [2023-02-17 01:44:39,544 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) [2023-02-17 01:44:39,545 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 284 transitions. [2023-02-17 01:44:39,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-17 01:44:39,546 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:39,546 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] [2023-02-17 01:44:39,551 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-17 01:44:39,751 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 [2023-02-17 01:44:39,752 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:39,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:39,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1140726838, now seen corresponding path program 4 times [2023-02-17 01:44:39,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:39,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200973032] [2023-02-17 01:44:39,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:39,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:39,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:39,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [691999523] [2023-02-17 01:44:39,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:44:39,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:39,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:39,775 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:44:39,777 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-17 01:44:39,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:44:39,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:44:39,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 01:44:39,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2023-02-17 01:44:39,845 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:44:39,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:39,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200973032] [2023-02-17 01:44:39,846 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:39,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691999523] [2023-02-17 01:44:39,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691999523] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:44:39,847 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:44:39,847 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 01:44:39,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698183939] [2023-02-17 01:44:39,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:44:39,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:44:39,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:39,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:44:39,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 01:44:39,849 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) [2023-02-17 01:44:39,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:39,953 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2023-02-17 01:44:39,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:44:39,954 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 [2023-02-17 01:44:39,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:39,955 INFO L225 Difference]: With dead ends: 253 [2023-02-17 01:44:39,955 INFO L226 Difference]: Without dead ends: 181 [2023-02-17 01:44:39,956 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 [2023-02-17 01:44:39,957 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 [2023-02-17 01:44:39,957 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] [2023-02-17 01:44:39,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-17 01:44:40,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 167. [2023-02-17 01:44:40,002 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) [2023-02-17 01:44:40,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2023-02-17 01:44:40,004 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 101 [2023-02-17 01:44:40,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:40,004 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2023-02-17 01:44:40,004 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) [2023-02-17 01:44:40,004 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2023-02-17 01:44:40,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-17 01:44:40,005 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:40,006 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] [2023-02-17 01:44:40,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-17 01:44:40,209 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 [2023-02-17 01:44:40,209 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:40,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2023-02-17 01:44:40,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:40,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273806492] [2023-02-17 01:44:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:40,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:40,229 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:40,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [769503165] [2023-02-17 01:44:40,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:40,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:40,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:40,231 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:44:40,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-17 01:44:40,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:40,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-17 01:44:40,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:40,468 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 57 proven. 28 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2023-02-17 01:44:40,468 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:41,666 INFO L134 CoverageAnalysis]: Checked inductivity of 320 backedges. 51 proven. 19 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2023-02-17 01:44:41,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:41,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273806492] [2023-02-17 01:44:41,667 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:41,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769503165] [2023-02-17 01:44:41,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769503165] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:44:41,667 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:44:41,667 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-02-17 01:44:41,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483114107] [2023-02-17 01:44:41,668 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:41,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 01:44:41,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 01:44:41,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-02-17 01:44:41,670 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) [2023-02-17 01:44:57,461 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:45:01,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:01,212 INFO L93 Difference]: Finished difference Result 209 states and 287 transitions. [2023-02-17 01:45:01,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-17 01:45:01,216 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 [2023-02-17 01:45:01,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:01,217 INFO L225 Difference]: With dead ends: 209 [2023-02-17 01:45:01,217 INFO L226 Difference]: Without dead ends: 207 [2023-02-17 01:45:01,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=334, Invalid=1224, Unknown=2, NotChecked=0, Total=1560 [2023-02-17 01:45:01,219 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 121 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.5s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:01,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [102 Valid, 161 Invalid, 994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 872 Invalid, 1 Unknown, 0 Unchecked, 9.5s Time] [2023-02-17 01:45:01,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-17 01:45:01,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 197. [2023-02-17 01:45:01,287 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) [2023-02-17 01:45:01,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 270 transitions. [2023-02-17 01:45:01,288 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 270 transitions. Word has length 103 [2023-02-17 01:45:01,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:01,288 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 270 transitions. [2023-02-17 01:45:01,289 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) [2023-02-17 01:45:01,289 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 270 transitions. [2023-02-17 01:45:01,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-17 01:45:01,290 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:01,290 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] [2023-02-17 01:45:01,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:01,496 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 [2023-02-17 01:45:01,496 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:01,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:01,497 INFO L85 PathProgramCache]: Analyzing trace with hash -349873392, now seen corresponding path program 2 times [2023-02-17 01:45:01,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:01,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109774093] [2023-02-17 01:45:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:01,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:01,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:01,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [638676007] [2023-02-17 01:45:01,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:45:01,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:01,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:01,514 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:45:01,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-17 01:45:01,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:45:01,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:45:01,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-17 01:45:01,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 63 proven. 51 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-17 01:45:01,722 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 57 proven. 42 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2023-02-17 01:45:02,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:02,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109774093] [2023-02-17 01:45:02,632 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:02,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638676007] [2023-02-17 01:45:02,633 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638676007] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:02,633 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:02,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2023-02-17 01:45:02,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932852078] [2023-02-17 01:45:02,633 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:02,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 01:45:02,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:02,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 01:45:02,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-02-17 01:45:02,635 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) [2023-02-17 01:45:15,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:15,537 INFO L93 Difference]: Finished difference Result 278 states and 390 transitions. [2023-02-17 01:45:15,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-17 01:45:15,538 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 [2023-02-17 01:45:15,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:15,539 INFO L225 Difference]: With dead ends: 278 [2023-02-17 01:45:15,539 INFO L226 Difference]: Without dead ends: 276 [2023-02-17 01:45:15,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=459, Invalid=2091, Unknown=0, NotChecked=0, Total=2550 [2023-02-17 01:45:15,542 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 108 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:15,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 262 Invalid, 1592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2023-02-17 01:45:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-02-17 01:45:15,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 244. [2023-02-17 01:45:15,664 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) [2023-02-17 01:45:15,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 337 transitions. [2023-02-17 01:45:15,665 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 337 transitions. Word has length 120 [2023-02-17 01:45:15,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:15,666 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 337 transitions. [2023-02-17 01:45:15,666 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) [2023-02-17 01:45:15,666 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 337 transitions. [2023-02-17 01:45:15,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-17 01:45:15,667 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:15,668 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] [2023-02-17 01:45:15,674 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:15,874 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 [2023-02-17 01:45:15,874 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:15,874 INFO L85 PathProgramCache]: Analyzing trace with hash -397785577, now seen corresponding path program 3 times [2023-02-17 01:45:15,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:15,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457681253] [2023-02-17 01:45:15,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:15,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:15,893 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:15,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1182647422] [2023-02-17 01:45:15,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:45:15,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:15,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:15,897 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:45:15,899 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-17 01:45:15,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 01:45:15,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:45:15,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-17 01:45:15,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:16,047 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 43 proven. 37 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2023-02-17 01:45:16,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:16,287 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2023-02-17 01:45:16,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:16,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457681253] [2023-02-17 01:45:16,288 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:16,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182647422] [2023-02-17 01:45:16,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182647422] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:16,288 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:16,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 8] total 18 [2023-02-17 01:45:16,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369739879] [2023-02-17 01:45:16,289 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:16,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 01:45:16,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:16,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 01:45:16,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2023-02-17 01:45:16,291 INFO L87 Difference]: Start difference. First operand 244 states and 337 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-17 01:45:19,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.56s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:45:19,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:19,264 INFO L93 Difference]: Finished difference Result 283 states and 394 transitions. [2023-02-17 01:45:19,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-02-17 01:45:19,264 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) Word has length 123 [2023-02-17 01:45:19,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:19,267 INFO L225 Difference]: With dead ends: 283 [2023-02-17 01:45:19,267 INFO L226 Difference]: Without dead ends: 281 [2023-02-17 01:45:19,268 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 227 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2023-02-17 01:45:19,268 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 51 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:19,268 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 243 Invalid, 790 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-02-17 01:45:19,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-02-17 01:45:19,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 248. [2023-02-17 01:45:19,391 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) [2023-02-17 01:45:19,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 340 transitions. [2023-02-17 01:45:19,393 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 340 transitions. Word has length 123 [2023-02-17 01:45:19,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:19,394 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 340 transitions. [2023-02-17 01:45:19,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 16 states have internal predecessors, (46), 10 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (32), 10 states have call predecessors, (32), 10 states have call successors, (32) [2023-02-17 01:45:19,394 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 340 transitions. [2023-02-17 01:45:19,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-17 01:45:19,398 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:19,398 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] [2023-02-17 01:45:19,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:19,604 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 [2023-02-17 01:45:19,604 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:19,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:19,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2023-02-17 01:45:19,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:19,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531208048] [2023-02-17 01:45:19,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:19,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:19,622 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:19,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [140632236] [2023-02-17 01:45:19,623 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:45:19,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:19,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:19,630 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:45:19,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-17 01:45:19,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:45:19,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:45:19,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 67 conjunts are in the unsatisfiable core [2023-02-17 01:45:19,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 38 proven. 52 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2023-02-17 01:45:19,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:21,242 INFO L134 CoverageAnalysis]: Checked inductivity of 615 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2023-02-17 01:45:21,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:21,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531208048] [2023-02-17 01:45:21,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:21,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140632236] [2023-02-17 01:45:21,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140632236] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:21,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:21,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-02-17 01:45:21,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219501788] [2023-02-17 01:45:21,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:21,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-17 01:45:21,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:21,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-17 01:45:21,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-02-17 01:45:21,250 INFO L87 Difference]: Start difference. First operand 248 states and 340 transitions. Second operand has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) [2023-02-17 01:45:45,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:45,554 INFO L93 Difference]: Finished difference Result 367 states and 516 transitions. [2023-02-17 01:45:45,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-17 01:45:45,554 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) Word has length 134 [2023-02-17 01:45:45,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:45,559 INFO L225 Difference]: With dead ends: 367 [2023-02-17 01:45:45,559 INFO L226 Difference]: Without dead ends: 359 [2023-02-17 01:45:45,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 238 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1219 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=855, Invalid=4115, Unknown=0, NotChecked=0, Total=4970 [2023-02-17 01:45:45,560 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 198 mSDsluCounter, 513 mSDsCounter, 0 mSdLazyCounter, 2043 mSolverCounterSat, 440 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 2483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 440 IncrementalHoareTripleChecker+Valid, 2043 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:45,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 622 Invalid, 2483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [440 Valid, 2043 Invalid, 0 Unknown, 0 Unchecked, 19.8s Time] [2023-02-17 01:45:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2023-02-17 01:45:45,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 341. [2023-02-17 01:45:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 180 states have (on average 1.1555555555555554) internal successors, (208), 185 states have internal predecessors, (208), 137 states have call successors, (137), 23 states have call predecessors, (137), 23 states have return successors, (136), 132 states have call predecessors, (136), 136 states have call successors, (136) [2023-02-17 01:45:45,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 481 transitions. [2023-02-17 01:45:45,809 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 481 transitions. Word has length 134 [2023-02-17 01:45:45,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:45,810 INFO L495 AbstractCegarLoop]: Abstraction has 341 states and 481 transitions. [2023-02-17 01:45:45,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.9615384615384615) internal successors, (51), 25 states have internal predecessors, (51), 14 states have call successors, (43), 3 states have call predecessors, (43), 2 states have return successors, (42), 12 states have call predecessors, (42), 12 states have call successors, (42) [2023-02-17 01:45:45,810 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 481 transitions. [2023-02-17 01:45:45,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-17 01:45:45,815 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:45,815 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] [2023-02-17 01:45:45,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-17 01:45:46,022 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 [2023-02-17 01:45:46,022 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:46,023 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 4 times [2023-02-17 01:45:46,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:46,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512895177] [2023-02-17 01:45:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:46,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:46,043 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:46,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222908709] [2023-02-17 01:45:46,048 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:45:46,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:46,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:46,050 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:45:46,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-17 01:45:46,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:45:46,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:45:46,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 92 conjunts are in the unsatisfiable core [2023-02-17 01:45:46,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:47,373 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 165 proven. 161 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2023-02-17 01:45:47,373 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:46:22,663 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 190 proven. 91 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2023-02-17 01:46:22,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:46:22,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512895177] [2023-02-17 01:46:22,664 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:46:22,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222908709] [2023-02-17 01:46:22,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222908709] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:46:22,664 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:46:22,664 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16] total 35 [2023-02-17 01:46:22,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517232894] [2023-02-17 01:46:22,664 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:46:22,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-17 01:46:22,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:46:22,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-17 01:46:22,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=993, Unknown=7, NotChecked=0, Total=1190 [2023-02-17 01:46:22,666 INFO L87 Difference]: Start difference. First operand 341 states and 481 transitions. Second operand has 35 states, 32 states have (on average 1.8125) internal successors, (58), 27 states have internal predecessors, (58), 15 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 19 states have call predecessors, (48), 14 states have call successors, (48) [2023-02-17 01:46:24,773 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:26,629 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:29,540 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-17 01:46:31,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:33,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-17 01:46:35,811 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:37,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:39,775 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:42,113 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:44,563 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:47,138 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:49,171 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:50,485 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:52,514 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:54,978 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:57,266 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:59,800 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-17 01:47:01,440 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:47:04,239 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:47:06,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:47:08,575 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-17 01:47:10,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-17 01:47:14,864 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.45s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:47:27,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-17 01:47:33,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:47:43,685 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.79s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-17 01:47:49,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:47:51,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:47:53,311 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:47:55,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:47:57,408 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:47:59,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-02-17 01:48:08,635 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:48:10,827 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:48:17,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:48:20,005 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:48:22,483 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:48:24,851 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 [] [2023-02-17 01:48:25,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:48:25,558 INFO L93 Difference]: Finished difference Result 386 states and 533 transitions. [2023-02-17 01:48:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-17 01:48:25,559 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 27 states have internal predecessors, (58), 15 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 19 states have call predecessors, (48), 14 states have call successors, (48) Word has length 150 [2023-02-17 01:48:25,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:48:25,561 INFO L225 Difference]: With dead ends: 386 [2023-02-17 01:48:25,561 INFO L226 Difference]: Without dead ends: 384 [2023-02-17 01:48:25,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 277 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1002 ImplicationChecksByTransitivity, 57.9s TimeCoverageRelationStatistics Valid=747, Invalid=3401, Unknown=12, NotChecked=0, Total=4160 [2023-02-17 01:48:25,563 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 179 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 1885 mSolverCounterSat, 366 mSolverCounterUnsat, 27 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 98.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 1885 IncrementalHoareTripleChecker+Invalid, 27 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 98.8s IncrementalHoareTripleChecker+Time [2023-02-17 01:48:25,563 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 295 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 1885 Invalid, 27 Unknown, 0 Unchecked, 98.8s Time] [2023-02-17 01:48:25,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-02-17 01:48:25,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 372. [2023-02-17 01:48:25,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 200 states have (on average 1.145) internal successors, (229), 207 states have internal predecessors, (229), 145 states have call successors, (145), 26 states have call predecessors, (145), 26 states have return successors, (144), 138 states have call predecessors, (144), 144 states have call successors, (144) [2023-02-17 01:48:25,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 518 transitions. [2023-02-17 01:48:25,919 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 518 transitions. Word has length 150 [2023-02-17 01:48:25,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:48:25,919 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 518 transitions. [2023-02-17 01:48:25,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.8125) internal successors, (58), 27 states have internal predecessors, (58), 15 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 19 states have call predecessors, (48), 14 states have call successors, (48) [2023-02-17 01:48:25,920 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 518 transitions. [2023-02-17 01:48:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-02-17 01:48:25,921 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:48:25,921 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] [2023-02-17 01:48:25,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-17 01:48:26,128 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 [2023-02-17 01:48:26,129 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:48:26,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:48:26,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1812352379, now seen corresponding path program 3 times [2023-02-17 01:48:26,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:48:26,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261540207] [2023-02-17 01:48:26,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:48:26,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:48:26,142 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:48:26,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277244917] [2023-02-17 01:48:26,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:48:26,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:48:26,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:48:26,144 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:48:26,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-17 01:48:26,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 01:48:26,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:48:26,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-17 01:48:26,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:48:26,301 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 99 proven. 31 refuted. 0 times theorem prover too weak. 792 trivial. 0 not checked. [2023-02-17 01:48:26,301 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:48:28,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:48:28,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261540207] [2023-02-17 01:48:28,670 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:48:28,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277244917] [2023-02-17 01:48:28,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277244917] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:48:28,671 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:48:28,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2023-02-17 01:48:28,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054644269] [2023-02-17 01:48:28,671 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:48:28,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-02-17 01:48:28,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:48:28,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-02-17 01:48:28,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=291, Unknown=1, NotChecked=0, Total=342 [2023-02-17 01:48:28,672 INFO L87 Difference]: Start difference. First operand 372 states and 518 transitions. Second operand has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-17 01:48:29,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:48:29,450 INFO L93 Difference]: Finished difference Result 420 states and 583 transitions. [2023-02-17 01:48:29,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 01:48:29,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 153 [2023-02-17 01:48:29,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:48:29,453 INFO L225 Difference]: With dead ends: 420 [2023-02-17 01:48:29,453 INFO L226 Difference]: Without dead ends: 413 [2023-02-17 01:48:29,454 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=83, Invalid=468, Unknown=1, NotChecked=0, Total=552 [2023-02-17 01:48:29,454 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 20 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:48:29,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 168 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 01:48:29,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-02-17 01:48:29,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 399. [2023-02-17 01:48:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 399 states, 212 states have (on average 1.1415094339622642) internal successors, (242), 219 states have internal predecessors, (242), 158 states have call successors, (158), 28 states have call predecessors, (158), 28 states have return successors, (157), 151 states have call predecessors, (157), 157 states have call successors, (157) [2023-02-17 01:48:29,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 399 states to 399 states and 557 transitions. [2023-02-17 01:48:29,923 INFO L78 Accepts]: Start accepts. Automaton has 399 states and 557 transitions. Word has length 153 [2023-02-17 01:48:29,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:48:29,924 INFO L495 AbstractCegarLoop]: Abstraction has 399 states and 557 transitions. [2023-02-17 01:48:29,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 4 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2023-02-17 01:48:29,924 INFO L276 IsEmpty]: Start isEmpty. Operand 399 states and 557 transitions. [2023-02-17 01:48:29,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-02-17 01:48:29,926 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:48:29,926 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:48:29,932 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-17 01:48:30,131 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 [2023-02-17 01:48:30,132 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:48:30,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:48:30,132 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 5 times [2023-02-17 01:48:30,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:48:30,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146359363] [2023-02-17 01:48:30,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:48:30,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:48:30,141 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:48:30,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186645190] [2023-02-17 01:48:30,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 01:48:30,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:48:30,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:48:30,145 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:48:30,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-17 01:48:30,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-17 01:48:30,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:48:30,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 97 conjunts are in the unsatisfiable core [2023-02-17 01:48:30,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:48:31,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 129 proven. 245 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2023-02-17 01:48:31,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:48:31,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:48:31,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146359363] [2023-02-17 01:48:31,415 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:48:31,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186645190] [2023-02-17 01:48:31,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186645190] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:48:31,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:48:31,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2023-02-17 01:48:31,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969498830] [2023-02-17 01:48:31,415 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:48:31,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 01:48:31,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:48:31,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 01:48:31,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2023-02-17 01:48:31,416 INFO L87 Difference]: Start difference. First operand 399 states and 557 transitions. Second operand has 21 states, 20 states have (on average 1.9) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2023-02-17 01:48:33,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:48:33,863 INFO L93 Difference]: Finished difference Result 482 states and 667 transitions. [2023-02-17 01:48:33,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-17 01:48:33,863 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) Word has length 175 [2023-02-17 01:48:33,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:48:33,866 INFO L225 Difference]: With dead ends: 482 [2023-02-17 01:48:33,866 INFO L226 Difference]: Without dead ends: 480 [2023-02-17 01:48:33,867 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 173 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2023-02-17 01:48:33,867 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 39 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-02-17 01:48:33,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 399 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-02-17 01:48:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2023-02-17 01:48:34,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 467. [2023-02-17 01:48:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 467 states, 249 states have (on average 1.140562248995984) internal successors, (284), 255 states have internal predecessors, (284), 182 states have call successors, (182), 35 states have call predecessors, (182), 35 states have return successors, (181), 176 states have call predecessors, (181), 181 states have call successors, (181) [2023-02-17 01:48:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 647 transitions. [2023-02-17 01:48:34,341 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 647 transitions. Word has length 175 [2023-02-17 01:48:34,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:48:34,342 INFO L495 AbstractCegarLoop]: Abstraction has 467 states and 647 transitions. [2023-02-17 01:48:34,342 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.9) internal successors, (38), 17 states have internal predecessors, (38), 10 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (29), 10 states have call predecessors, (29), 9 states have call successors, (29) [2023-02-17 01:48:34,342 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 647 transitions. [2023-02-17 01:48:34,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-02-17 01:48:34,344 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:48:34,345 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:48:34,353 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-02-17 01:48:34,553 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 [2023-02-17 01:48:34,553 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:48:34,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:48:34,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1493603019, now seen corresponding path program 4 times [2023-02-17 01:48:34,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:48:34,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348122926] [2023-02-17 01:48:34,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:48:34,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:48:34,565 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:48:34,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1996505133] [2023-02-17 01:48:34,565 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:48:34,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:48:34,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:48:34,567 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:48:34,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-17 01:48:34,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:48:34,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:48:34,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-17 01:48:34,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:48:34,911 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 54 proven. 106 refuted. 0 times theorem prover too weak. 1149 trivial. 0 not checked. [2023-02-17 01:48:34,911 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:48:38,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 48 proven. 97 refuted. 0 times theorem prover too weak. 1164 trivial. 0 not checked. [2023-02-17 01:48:38,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:48:38,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348122926] [2023-02-17 01:48:38,732 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:48:38,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996505133] [2023-02-17 01:48:38,732 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996505133] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:48:38,732 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:48:38,733 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2023-02-17 01:48:38,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479002770] [2023-02-17 01:48:38,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:48:38,733 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-17 01:48:38,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:48:38,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-17 01:48:38,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=797, Unknown=0, NotChecked=0, Total=930 [2023-02-17 01:48:38,734 INFO L87 Difference]: Start difference. First operand 467 states and 647 transitions. Second operand has 31 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 28 states have internal predecessors, (59), 18 states have call successors, (59), 3 states have call predecessors, (59), 2 states have return successors, (58), 16 states have call predecessors, (58), 16 states have call successors, (58)