./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.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_valuebound5.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 ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 --- Real Ultimate output --- This is Ultimate 0.2.2-?-26d01a9 [2023-02-17 01:44:11,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-17 01:44:11,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-17 01:44:12,010 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-17 01:44:12,010 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-17 01:44:12,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-17 01:44:12,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-17 01:44:12,016 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-17 01:44:12,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-17 01:44:12,018 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-17 01:44:12,019 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-17 01:44:12,019 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-17 01:44:12,020 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-17 01:44:12,020 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-17 01:44:12,021 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-17 01:44:12,022 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-17 01:44:12,023 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-17 01:44:12,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-17 01:44:12,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-17 01:44:12,029 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-17 01:44:12,030 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-17 01:44:12,031 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-17 01:44:12,032 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-17 01:44:12,033 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-17 01:44:12,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-17 01:44:12,039 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-17 01:44:12,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-17 01:44:12,040 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-17 01:44:12,041 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-17 01:44:12,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-17 01:44:12,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-17 01:44:12,042 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-17 01:44:12,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-17 01:44:12,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-17 01:44:12,045 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-17 01:44:12,045 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-17 01:44:12,045 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-17 01:44:12,045 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-17 01:44:12,045 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-17 01:44:12,046 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-17 01:44:12,047 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-17 01:44:12,048 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-17 01:44:12,081 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-17 01:44:12,083 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-17 01:44:12,083 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-17 01:44:12,084 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-17 01:44:12,084 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-17 01:44:12,084 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-17 01:44:12,085 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-17 01:44:12,085 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-17 01:44:12,085 INFO L138 SettingsManager]: * Use SBE=true [2023-02-17 01:44:12,085 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-17 01:44:12,086 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-17 01:44:12,086 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-17 01:44:12,086 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-17 01:44:12,086 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-17 01:44:12,086 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-17 01:44:12,087 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-17 01:44:12,087 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-17 01:44:12,087 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-17 01:44:12,087 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-17 01:44:12,087 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-17 01:44:12,087 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-17 01:44:12,087 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-17 01:44:12,088 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-17 01:44:12,088 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-17 01:44:12,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:44:12,088 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-17 01:44:12,088 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-17 01:44:12,088 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-17 01:44:12,089 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-17 01:44:12,089 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-17 01:44:12,089 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-17 01:44:12,089 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-17 01:44:12,090 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-17 01:44:12,090 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-17 01:44:12,090 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-17 01:44:12,090 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ab50d4c44616d850baf388e04d7eb1063c3cea27d21c9cbb628b158ef2bdff42 [2023-02-17 01:44:12,304 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-17 01:44:12,328 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-17 01:44:12,330 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-17 01:44:12,330 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-17 01:44:12,331 INFO L275 PluginConnector]: CDTParser initialized [2023-02-17 01:44:12,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2023-02-17 01:44:13,310 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-17 01:44:13,487 INFO L351 CDTParser]: Found 1 translation units. [2023-02-17 01:44:13,487 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound5.c [2023-02-17 01:44:13,492 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd4cc9d1/6e4b22a9d67e421ca951ef635a4004ad/FLAGaacb191e0 [2023-02-17 01:44:13,509 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5bd4cc9d1/6e4b22a9d67e421ca951ef635a4004ad [2023-02-17 01:44:13,511 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-17 01:44:13,512 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-17 01:44:13,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-17 01:44:13,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-17 01:44:13,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-17 01:44:13,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:44:13" (1/1) ... [2023-02-17 01:44:13,519 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ad611d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13, skipping insertion in model container [2023-02-17 01:44:13,519 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.02 01:44:13" (1/1) ... [2023-02-17 01:44:13,524 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-17 01:44:13,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-17 01:44:13,628 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_valuebound5.c[490,503] [2023-02-17 01:44:13,641 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:44:13,647 INFO L203 MainTranslator]: Completed pre-run [2023-02-17 01:44:13,655 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_valuebound5.c[490,503] [2023-02-17 01:44:13,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-17 01:44:13,669 INFO L208 MainTranslator]: Completed translation [2023-02-17 01:44:13,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13 WrapperNode [2023-02-17 01:44:13,670 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-17 01:44:13,671 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-17 01:44:13,671 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-17 01:44:13,671 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-17 01:44:13,675 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13" (1/1) ... [2023-02-17 01:44:13,680 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13" (1/1) ... [2023-02-17 01:44:13,690 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 77 [2023-02-17 01:44:13,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-17 01:44:13,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-17 01:44:13,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-17 01:44:13,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-17 01:44:13,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13" (1/1) ... [2023-02-17 01:44:13,697 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13" (1/1) ... [2023-02-17 01:44:13,698 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13" (1/1) ... [2023-02-17 01:44:13,698 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13" (1/1) ... [2023-02-17 01:44:13,700 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13" (1/1) ... [2023-02-17 01:44:13,702 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13" (1/1) ... [2023-02-17 01:44:13,702 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13" (1/1) ... [2023-02-17 01:44:13,703 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13" (1/1) ... [2023-02-17 01:44:13,704 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-17 01:44:13,705 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-17 01:44:13,705 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-17 01:44:13,705 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-17 01:44:13,705 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13" (1/1) ... [2023-02-17 01:44:13,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-17 01:44:13,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:13,742 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 01:44:13,754 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 01:44:13,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-17 01:44:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-17 01:44:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-17 01:44:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-17 01:44:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-17 01:44:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-17 01:44:13,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-02-17 01:44:13,785 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-02-17 01:44:13,826 INFO L235 CfgBuilder]: Building ICFG [2023-02-17 01:44:13,827 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-17 01:44:13,965 INFO L276 CfgBuilder]: Performing block encoding [2023-02-17 01:44:13,983 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-17 01:44:13,984 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-17 01:44:13,985 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:44:13 BoogieIcfgContainer [2023-02-17 01:44:13,985 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-17 01:44:13,986 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-17 01:44:13,987 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-17 01:44:13,989 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-17 01:44:13,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.02 01:44:13" (1/3) ... [2023-02-17 01:44:13,989 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76dd110f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:44:13, skipping insertion in model container [2023-02-17 01:44:13,989 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.02 01:44:13" (2/3) ... [2023-02-17 01:44:13,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76dd110f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.02 01:44:13, skipping insertion in model container [2023-02-17 01:44:13,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.02 01:44:13" (3/3) ... [2023-02-17 01:44:13,991 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound5.c [2023-02-17 01:44:14,001 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-17 01:44:14,001 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-17 01:44:14,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-17 01:44:14,033 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;@4ca5ded6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-17 01:44:14,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-17 01:44:14,036 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 01:44:14,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-02-17 01:44:14,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:14,041 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 01:44:14,042 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:14,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:14,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1146169762, now seen corresponding path program 1 times [2023-02-17 01:44:14,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:14,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438905660] [2023-02-17 01:44:14,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:14,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:14,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:14,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438905660] [2023-02-17 01:44:14,164 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-17 01:44:14,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157039400] [2023-02-17 01:44:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:14,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:14,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:14,167 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 01:44:14,183 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 01:44:14,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:14,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-17 01:44:14,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:14,317 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 01:44:14,317 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:44:14,317 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157039400] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:44:14,318 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:44:14,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-17 01:44:14,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511004240] [2023-02-17 01:44:14,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:44:14,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-17 01:44:14,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:14,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-17 01:44:14,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-17 01:44:14,354 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 01:44:14,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:14,371 INFO L93 Difference]: Finished difference Result 67 states and 112 transitions. [2023-02-17 01:44:14,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-17 01:44:14,373 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 01:44:14,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:14,377 INFO L225 Difference]: With dead ends: 67 [2023-02-17 01:44:14,377 INFO L226 Difference]: Without dead ends: 31 [2023-02-17 01:44:14,379 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 01:44:14,382 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 01:44:14,382 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 01:44:14,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-17 01:44:14,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-02-17 01:44:14,406 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 01:44:14,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2023-02-17 01:44:14,409 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 39 [2023-02-17 01:44:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:14,409 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2023-02-17 01:44:14,410 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 01:44:14,410 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-02-17 01:44:14,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-17 01:44:14,411 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:14,411 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 01:44:14,426 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-17 01:44:14,614 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 01:44:14,614 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:14,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:14,615 INFO L85 PathProgramCache]: Analyzing trace with hash 846808023, now seen corresponding path program 1 times [2023-02-17 01:44:14,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:14,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132142568] [2023-02-17 01:44:14,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:14,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:14,631 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:14,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963840293] [2023-02-17 01:44:14,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:14,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:14,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:14,636 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 01:44:14,639 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 01:44:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:14,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 7 conjunts are in the unsatisfiable core [2023-02-17 01:44:14,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:14,769 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 01:44:14,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:14,805 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 01:44:14,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:14,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132142568] [2023-02-17 01:44:14,806 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:14,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963840293] [2023-02-17 01:44:14,806 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963840293] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:44:14,806 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:44:14,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2023-02-17 01:44:14,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610285856] [2023-02-17 01:44:14,807 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:14,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 01:44:14,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:14,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 01:44:14,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-02-17 01:44:14,809 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 01:44:14,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:14,872 INFO L93 Difference]: Finished difference Result 48 states and 65 transitions. [2023-02-17 01:44:14,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:44:14,873 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 01:44:14,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:14,874 INFO L225 Difference]: With dead ends: 48 [2023-02-17 01:44:14,874 INFO L226 Difference]: Without dead ends: 40 [2023-02-17 01:44:14,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:44:14,875 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 20 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:44:14,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:44:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-17 01:44:14,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2023-02-17 01:44:14,881 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 01:44:14,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 44 transitions. [2023-02-17 01:44:14,882 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 44 transitions. Word has length 40 [2023-02-17 01:44:14,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:14,883 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 44 transitions. [2023-02-17 01:44:14,883 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 01:44:14,883 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-02-17 01:44:14,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-17 01:44:14,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:14,884 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 01:44:14,894 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 01:44:15,093 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 01:44:15,093 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:15,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:15,094 INFO L85 PathProgramCache]: Analyzing trace with hash 481927254, now seen corresponding path program 1 times [2023-02-17 01:44:15,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:15,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216643815] [2023-02-17 01:44:15,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:15,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:15,109 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:15,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [930361216] [2023-02-17 01:44:15,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:15,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:15,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:15,114 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 01:44:15,122 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 01:44:15,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:15,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 01:44:15,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:15,269 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 01:44:15,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:15,303 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 01:44:15,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:15,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216643815] [2023-02-17 01:44:15,304 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:15,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930361216] [2023-02-17 01:44:15,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930361216] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 01:44:15,305 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:44:15,305 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2023-02-17 01:44:15,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264259867] [2023-02-17 01:44:15,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:44:15,305 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:44:15,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:15,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:44:15,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2023-02-17 01:44:15,306 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 01:44:15,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:15,338 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2023-02-17 01:44:15,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:44:15,339 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 01:44:15,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:15,340 INFO L225 Difference]: With dead ends: 39 [2023-02-17 01:44:15,340 INFO L226 Difference]: Without dead ends: 37 [2023-02-17 01:44:15,340 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 01:44:15,341 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 01:44:15,341 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 01:44:15,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-02-17 01:44:15,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-02-17 01:44:15,346 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 01:44:15,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-02-17 01:44:15,347 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 41 [2023-02-17 01:44:15,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:15,348 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-02-17 01:44:15,348 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 01:44:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-02-17 01:44:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-02-17 01:44:15,349 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:15,349 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 01:44:15,359 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 01:44:15,562 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 01:44:15,563 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:15,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:15,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1626076469, now seen corresponding path program 1 times [2023-02-17 01:44:15,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:15,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447439482] [2023-02-17 01:44:15,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:15,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:15,585 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:15,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [713501241] [2023-02-17 01:44:15,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:15,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:15,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:15,594 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 01:44:15,595 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 01:44:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:15,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 27 conjunts are in the unsatisfiable core [2023-02-17 01:44:15,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:15,764 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 01:44:15,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:15,806 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 01:44:15,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:15,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447439482] [2023-02-17 01:44:15,807 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:15,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713501241] [2023-02-17 01:44:15,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713501241] provided 1 perfect and 1 imperfect interpolant sequences [2023-02-17 01:44:15,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:44:15,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [11] total 13 [2023-02-17 01:44:15,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261996012] [2023-02-17 01:44:15,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:44:15,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:44:15,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:15,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:44:15,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2023-02-17 01:44:15,811 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 01:44:15,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:15,858 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2023-02-17 01:44:15,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:44:15,861 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 01:44:15,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:15,863 INFO L225 Difference]: With dead ends: 50 [2023-02-17 01:44:15,863 INFO L226 Difference]: Without dead ends: 48 [2023-02-17 01:44:15,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2023-02-17 01:44:15,867 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 01:44:15,868 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 01:44:15,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-17 01:44:15,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2023-02-17 01:44:15,876 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 01:44:15,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 61 transitions. [2023-02-17 01:44:15,877 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 61 transitions. Word has length 46 [2023-02-17 01:44:15,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:15,877 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 61 transitions. [2023-02-17 01:44:15,878 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 01:44:15,878 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 61 transitions. [2023-02-17 01:44:15,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-02-17 01:44:15,879 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:15,879 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 01:44:15,886 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-17 01:44:16,083 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 01:44:16,084 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:16,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:16,085 INFO L85 PathProgramCache]: Analyzing trace with hash 779090230, now seen corresponding path program 1 times [2023-02-17 01:44:16,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:16,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309471672] [2023-02-17 01:44:16,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:16,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:16,095 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:16,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185229267] [2023-02-17 01:44:16,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:16,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:16,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:16,096 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 01:44:16,112 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 01:44:16,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:16,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-17 01:44:16,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:16,174 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 01:44:16,175 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:16,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:16,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309471672] [2023-02-17 01:44:16,206 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:16,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185229267] [2023-02-17 01:44:16,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185229267] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:44:16,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:44:16,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2023-02-17 01:44:16,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067655871] [2023-02-17 01:44:16,207 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:16,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-17 01:44:16,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:16,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-17 01:44:16,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:44:16,208 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 01:44:16,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:16,285 INFO L93 Difference]: Finished difference Result 54 states and 67 transitions. [2023-02-17 01:44:16,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-02-17 01:44:16,285 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 01:44:16,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:16,286 INFO L225 Difference]: With dead ends: 54 [2023-02-17 01:44:16,286 INFO L226 Difference]: Without dead ends: 52 [2023-02-17 01:44:16,286 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 01:44:16,287 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 11 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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 01:44:16,287 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 01:44:16,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-17 01:44:16,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-02-17 01:44:16,293 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 01:44:16,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 64 transitions. [2023-02-17 01:44:16,294 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 64 transitions. Word has length 51 [2023-02-17 01:44:16,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:16,294 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 64 transitions. [2023-02-17 01:44:16,295 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 01:44:16,295 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 64 transitions. [2023-02-17 01:44:16,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-17 01:44:16,296 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:16,296 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 01:44:16,303 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 01:44:16,501 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 01:44:16,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:16,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:16,502 INFO L85 PathProgramCache]: Analyzing trace with hash -670274197, now seen corresponding path program 1 times [2023-02-17 01:44:16,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:16,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955056981] [2023-02-17 01:44:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:16,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:16,512 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:16,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934016988] [2023-02-17 01:44:16,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:16,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:16,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:16,529 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 01:44:16,554 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 01:44:16,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:16,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 01:44:16,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:16,701 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 01:44:16,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:16,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:16,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955056981] [2023-02-17 01:44:16,744 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:16,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934016988] [2023-02-17 01:44:16,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934016988] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:44:16,744 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:44:16,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2023-02-17 01:44:16,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762937471] [2023-02-17 01:44:16,751 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:16,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-17 01:44:16,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:16,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-17 01:44:16,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2023-02-17 01:44:16,753 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 01:44:16,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:16,918 INFO L93 Difference]: Finished difference Result 60 states and 72 transitions. [2023-02-17 01:44:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 01:44:16,919 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 01:44:16,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:16,919 INFO L225 Difference]: With dead ends: 60 [2023-02-17 01:44:16,919 INFO L226 Difference]: Without dead ends: 58 [2023-02-17 01:44:16,920 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 01:44:16,920 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, 0.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:44:16,921 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 120 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-17 01:44:16,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-02-17 01:44:16,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 55. [2023-02-17 01:44:16,927 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 01:44:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2023-02-17 01:44:16,927 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 56 [2023-02-17 01:44:16,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:16,928 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2023-02-17 01:44:16,928 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 01:44:16,928 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2023-02-17 01:44:16,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-17 01:44:16,929 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:16,929 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 01:44:16,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-02-17 01:44:17,133 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 01:44:17,134 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:17,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:17,135 INFO L85 PathProgramCache]: Analyzing trace with hash -759965185, now seen corresponding path program 1 times [2023-02-17 01:44:17,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:17,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304826246] [2023-02-17 01:44:17,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:17,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:17,143 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:17,143 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [114769076] [2023-02-17 01:44:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:17,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:17,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:17,145 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 01:44:17,147 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 01:44:17,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:17,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 9 conjunts are in the unsatisfiable core [2023-02-17 01:44:17,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:17,240 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 01:44:17,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:17,266 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 01:44:17,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:17,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304826246] [2023-02-17 01:44:17,267 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:17,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114769076] [2023-02-17 01:44:17,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114769076] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:44:17,267 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:44:17,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2023-02-17 01:44:17,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562103761] [2023-02-17 01:44:17,267 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:17,268 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-17 01:44:17,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:17,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-17 01:44:17,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2023-02-17 01:44:17,269 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 01:44:17,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:17,388 INFO L93 Difference]: Finished difference Result 102 states and 142 transitions. [2023-02-17 01:44:17,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-17 01:44:17,389 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 01:44:17,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:17,390 INFO L225 Difference]: With dead ends: 102 [2023-02-17 01:44:17,390 INFO L226 Difference]: Without dead ends: 94 [2023-02-17 01:44:17,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-02-17 01:44:17,391 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 01:44:17,391 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 01:44:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-02-17 01:44:17,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 85. [2023-02-17 01:44:17,402 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 01:44:17,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 118 transitions. [2023-02-17 01:44:17,403 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 118 transitions. Word has length 65 [2023-02-17 01:44:17,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:17,403 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 118 transitions. [2023-02-17 01:44:17,403 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 01:44:17,404 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 118 transitions. [2023-02-17 01:44:17,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-17 01:44:17,404 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:17,405 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 01:44:17,425 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 01:44:17,609 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 01:44:17,610 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:17,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:17,610 INFO L85 PathProgramCache]: Analyzing trace with hash -696294669, now seen corresponding path program 1 times [2023-02-17 01:44:17,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:17,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227943721] [2023-02-17 01:44:17,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:17,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:17,626 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:17,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2094543699] [2023-02-17 01:44:17,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:17,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:17,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:17,628 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 01:44:17,629 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 01:44:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:17,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-17 01:44:17,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:17,714 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 01:44:17,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:17,768 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 01:44:17,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227943721] [2023-02-17 01:44:17,769 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:17,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094543699] [2023-02-17 01:44:17,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094543699] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:44:17,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:44:17,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2023-02-17 01:44:17,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507471869] [2023-02-17 01:44:17,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:17,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 01:44:17,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:17,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 01:44:17,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2023-02-17 01:44:17,771 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 01:44:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:18,091 INFO L93 Difference]: Finished difference Result 128 states and 183 transitions. [2023-02-17 01:44:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 01:44:18,092 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 01:44:18,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:18,096 INFO L225 Difference]: With dead ends: 128 [2023-02-17 01:44:18,097 INFO L226 Difference]: Without dead ends: 124 [2023-02-17 01:44:18,097 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 01:44:18,098 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 46 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 01:44:18,098 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 01:44:18,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-17 01:44:18,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2023-02-17 01:44:18,125 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 01:44:18,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 126 transitions. [2023-02-17 01:44:18,126 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 126 transitions. Word has length 71 [2023-02-17 01:44:18,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:18,127 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 126 transitions. [2023-02-17 01:44:18,127 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 01:44:18,127 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 126 transitions. [2023-02-17 01:44:18,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-17 01:44:18,130 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:18,130 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 01:44:18,137 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 01:44:18,335 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 01:44:18,335 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:18,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:18,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1352497678, now seen corresponding path program 2 times [2023-02-17 01:44:18,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:18,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743413910] [2023-02-17 01:44:18,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:18,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:18,355 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:18,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636543255] [2023-02-17 01:44:18,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:44:18,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:18,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:18,360 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 01:44:18,367 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 01:44:18,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:44:18,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:44:18,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-17 01:44:18,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:18,547 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 01:44:18,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:19,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:19,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743413910] [2023-02-17 01:44:19,040 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:19,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636543255] [2023-02-17 01:44:19,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636543255] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:44:19,040 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:44:19,040 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-17 01:44:19,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121046266] [2023-02-17 01:44:19,041 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:19,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 01:44:19,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:19,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 01:44:19,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2023-02-17 01:44:19,042 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 01:44:19,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:19,588 INFO L93 Difference]: Finished difference Result 124 states and 165 transitions. [2023-02-17 01:44:19,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 01:44:19,588 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 01:44:19,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:19,589 INFO L225 Difference]: With dead ends: 124 [2023-02-17 01:44:19,589 INFO L226 Difference]: Without dead ends: 122 [2023-02-17 01:44:19,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=94, Invalid=506, Unknown=0, NotChecked=0, Total=600 [2023-02-17 01:44:19,590 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 01:44:19,590 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 01:44:19,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2023-02-17 01:44:19,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2023-02-17 01:44:19,605 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 01:44:19,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 160 transitions. [2023-02-17 01:44:19,606 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 160 transitions. Word has length 76 [2023-02-17 01:44:19,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:19,606 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 160 transitions. [2023-02-17 01:44:19,607 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 01:44:19,607 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2023-02-17 01:44:19,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-17 01:44:19,607 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:19,607 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 01:44:19,633 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 01:44:19,812 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 01:44:19,813 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:19,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:19,813 INFO L85 PathProgramCache]: Analyzing trace with hash -421153901, now seen corresponding path program 3 times [2023-02-17 01:44:19,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:19,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965528519] [2023-02-17 01:44:19,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:19,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:19,821 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:19,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1227833078] [2023-02-17 01:44:19,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:44:19,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:19,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:19,822 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 01:44:19,842 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 01:44:19,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 01:44:19,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:44:19,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-17 01:44:19,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:19,942 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2023-02-17 01:44:19,943 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:20,529 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:20,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965528519] [2023-02-17 01:44:20,530 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:20,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227833078] [2023-02-17 01:44:20,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227833078] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:44:20,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:44:20,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-02-17 01:44:20,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205483907] [2023-02-17 01:44:20,530 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:20,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-17 01:44:20,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-17 01:44:20,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2023-02-17 01:44:20,531 INFO L87 Difference]: Start difference. First operand 119 states and 160 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-02-17 01:44:20,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:20,848 INFO L93 Difference]: Finished difference Result 128 states and 168 transitions. [2023-02-17 01:44:20,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-17 01:44:20,849 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) Word has length 81 [2023-02-17 01:44:20,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:20,850 INFO L225 Difference]: With dead ends: 128 [2023-02-17 01:44:20,850 INFO L226 Difference]: Without dead ends: 126 [2023-02-17 01:44:20,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=79, Invalid=383, Unknown=0, NotChecked=0, Total=462 [2023-02-17 01:44:20,851 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-17 01:44:20,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 181 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-17 01:44:20,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-02-17 01:44:20,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2023-02-17 01:44:20,865 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 01:44:20,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 163 transitions. [2023-02-17 01:44:20,866 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 163 transitions. Word has length 81 [2023-02-17 01:44:20,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:20,866 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 163 transitions. [2023-02-17 01:44:20,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 5 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 5 states have call predecessors, (13), 5 states have call successors, (13) [2023-02-17 01:44:20,867 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 163 transitions. [2023-02-17 01:44:20,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-02-17 01:44:20,867 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:20,868 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 01:44:20,874 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-02-17 01:44:21,072 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 01:44:21,073 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:21,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:21,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1712962370, now seen corresponding path program 1 times [2023-02-17 01:44:21,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:21,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441184980] [2023-02-17 01:44:21,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:21,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:21,090 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:21,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [332906929] [2023-02-17 01:44:21,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:21,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:21,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:21,105 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 01:44:21,145 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 01:44:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:21,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 45 conjunts are in the unsatisfiable core [2023-02-17 01:44:21,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:21,256 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 01:44:21,256 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:21,809 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 01:44:21,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:21,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441184980] [2023-02-17 01:44:21,810 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:21,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332906929] [2023-02-17 01:44:21,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332906929] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:44:21,810 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:44:21,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-02-17 01:44:21,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894287999] [2023-02-17 01:44:21,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:21,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-02-17 01:44:21,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:21,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-02-17 01:44:21,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2023-02-17 01:44:21,812 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 01:44:27,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:27,084 INFO L93 Difference]: Finished difference Result 208 states and 295 transitions. [2023-02-17 01:44:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-02-17 01:44:27,085 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 01:44:27,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:27,086 INFO L225 Difference]: With dead ends: 208 [2023-02-17 01:44:27,086 INFO L226 Difference]: Without dead ends: 204 [2023-02-17 01:44:27,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 152 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2023-02-17 01:44:27,087 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 95 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 915 mSolverCounterSat, 204 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 204 IncrementalHoareTripleChecker+Valid, 915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:44:27,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 368 Invalid, 1119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [204 Valid, 915 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-02-17 01:44:27,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2023-02-17 01:44:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2023-02-17 01:44:27,141 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 01:44:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 284 transitions. [2023-02-17 01:44:27,142 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 284 transitions. Word has length 87 [2023-02-17 01:44:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:27,142 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 284 transitions. [2023-02-17 01:44:27,142 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 01:44:27,142 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 284 transitions. [2023-02-17 01:44:27,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-17 01:44:27,143 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:27,143 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 01:44:27,148 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 01:44:27,348 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 01:44:27,348 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:27,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1140726838, now seen corresponding path program 4 times [2023-02-17 01:44:27,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:27,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482093477] [2023-02-17 01:44:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:27,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:27,356 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:27,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [705638765] [2023-02-17 01:44:27,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:44:27,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:27,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:27,357 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 01:44:27,364 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 01:44:27,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:44:27,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:44:27,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 5 conjunts are in the unsatisfiable core [2023-02-17 01:44:27,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:27,417 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 01:44:27,417 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-17 01:44:27,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:27,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482093477] [2023-02-17 01:44:27,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:27,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705638765] [2023-02-17 01:44:27,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705638765] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-17 01:44:27,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-17 01:44:27,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-17 01:44:27,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026908618] [2023-02-17 01:44:27,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-17 01:44:27,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-17 01:44:27,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:27,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-17 01:44:27,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-17 01:44:27,419 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 01:44:27,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:27,492 INFO L93 Difference]: Finished difference Result 253 states and 356 transitions. [2023-02-17 01:44:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-17 01:44:27,493 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 01:44:27,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:27,494 INFO L225 Difference]: With dead ends: 253 [2023-02-17 01:44:27,494 INFO L226 Difference]: Without dead ends: 181 [2023-02-17 01:44:27,494 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 01:44:27,495 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, 0.0s IncrementalHoareTripleChecker+Time [2023-02-17 01:44:27,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 145 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-17 01:44:27,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2023-02-17 01:44:27,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 167. [2023-02-17 01:44:27,525 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 01:44:27,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 227 transitions. [2023-02-17 01:44:27,526 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 227 transitions. Word has length 101 [2023-02-17 01:44:27,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:27,526 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 227 transitions. [2023-02-17 01:44:27,527 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 01:44:27,527 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 227 transitions. [2023-02-17 01:44:27,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-02-17 01:44:27,527 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:27,527 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 01:44:27,532 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 01:44:27,730 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 01:44:27,730 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:27,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:27,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1899970478, now seen corresponding path program 1 times [2023-02-17 01:44:27,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:27,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890794289] [2023-02-17 01:44:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:27,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:27,736 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:27,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1550490886] [2023-02-17 01:44:27,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:27,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:27,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:27,738 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 01:44:27,740 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 01:44:27,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:44:27,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-17 01:44:27,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:27,926 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 01:44:27,927 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:28,556 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 01:44:28,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:28,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890794289] [2023-02-17 01:44:28,557 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:28,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550490886] [2023-02-17 01:44:28,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550490886] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:44:28,558 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:44:28,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 22 [2023-02-17 01:44:28,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352726395] [2023-02-17 01:44:28,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:28,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-02-17 01:44:28,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:28,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-02-17 01:44:28,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2023-02-17 01:44:28,560 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 01:44:35,168 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 01:44:38,750 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:44:42,359 WARN L539 Checker$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 01:44:45,724 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 01:44:48,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:44:48,258 INFO L93 Difference]: Finished difference Result 209 states and 287 transitions. [2023-02-17 01:44:48,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-17 01:44:48,259 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 01:44:48,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:44:48,260 INFO L225 Difference]: With dead ends: 209 [2023-02-17 01:44:48,260 INFO L226 Difference]: Without dead ends: 207 [2023-02-17 01:44:48,261 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 183 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=334, Invalid=1226, Unknown=0, NotChecked=0, Total=1560 [2023-02-17 01:44:48,262 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 87 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 946 mSolverCounterSat, 118 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 946 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:44:48,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 172 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 946 Invalid, 4 Unknown, 0 Unchecked, 16.2s Time] [2023-02-17 01:44:48,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-02-17 01:44:48,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 197. [2023-02-17 01:44:48,343 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 01:44:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 270 transitions. [2023-02-17 01:44:48,345 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 270 transitions. Word has length 103 [2023-02-17 01:44:48,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:44:48,345 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 270 transitions. [2023-02-17 01:44:48,345 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 01:44:48,345 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 270 transitions. [2023-02-17 01:44:48,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-17 01:44:48,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:44:48,346 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 01:44:48,351 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 01:44:48,551 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 01:44:48,552 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:44:48,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:44:48,552 INFO L85 PathProgramCache]: Analyzing trace with hash -349873392, now seen corresponding path program 2 times [2023-02-17 01:44:48,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:44:48,552 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466442862] [2023-02-17 01:44:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:44:48,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:44:48,559 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:44:48,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577393259] [2023-02-17 01:44:48,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:44:48,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:44:48,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:44:48,561 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 01:44:48,566 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 01:44:48,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:44:48,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:44:48,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-17 01:44:48,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:44:48,749 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 01:44:48,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:44:49,561 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 01:44:49,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:44:49,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466442862] [2023-02-17 01:44:49,562 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:44:49,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577393259] [2023-02-17 01:44:49,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577393259] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:44:49,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:44:49,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2023-02-17 01:44:49,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887653707] [2023-02-17 01:44:49,563 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:44:49,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-17 01:44:49,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:44:49,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-17 01:44:49,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2023-02-17 01:44:49,564 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 01:45:01,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:01,987 INFO L93 Difference]: Finished difference Result 278 states and 390 transitions. [2023-02-17 01:45:01,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-17 01:45:01,987 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 01:45:01,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:01,989 INFO L225 Difference]: With dead ends: 278 [2023-02-17 01:45:01,989 INFO L226 Difference]: Without dead ends: 276 [2023-02-17 01:45:01,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 215 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=459, Invalid=2091, Unknown=0, NotChecked=0, Total=2550 [2023-02-17 01:45:01,990 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 98 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 1553 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 1553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:01,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 299 Invalid, 1777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 1553 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2023-02-17 01:45:01,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2023-02-17 01:45:02,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 244. [2023-02-17 01:45:02,099 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 01:45:02,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 337 transitions. [2023-02-17 01:45:02,100 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 337 transitions. Word has length 120 [2023-02-17 01:45:02,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:02,100 INFO L495 AbstractCegarLoop]: Abstraction has 244 states and 337 transitions. [2023-02-17 01:45:02,101 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 01:45:02,101 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 337 transitions. [2023-02-17 01:45:02,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-02-17 01:45:02,102 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:02,102 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 01:45:02,107 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-02-17 01:45:02,307 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 01:45:02,307 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:02,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:02,308 INFO L85 PathProgramCache]: Analyzing trace with hash -397785577, now seen corresponding path program 3 times [2023-02-17 01:45:02,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:02,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017088776] [2023-02-17 01:45:02,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:02,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:02,314 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:02,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943783744] [2023-02-17 01:45:02,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:45:02,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:02,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:02,316 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 01:45:02,317 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 01:45:02,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-17 01:45:02,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:45:02,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 68 conjunts are in the unsatisfiable core [2023-02-17 01:45:02,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:02,558 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 75 proven. 44 refuted. 0 times theorem prover too weak. 370 trivial. 0 not checked. [2023-02-17 01:45:02,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:04,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:04,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017088776] [2023-02-17 01:45:04,792 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:04,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943783744] [2023-02-17 01:45:04,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943783744] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:45:04,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:45:04,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-02-17 01:45:04,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608787600] [2023-02-17 01:45:04,792 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:04,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-17 01:45:04,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:04,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-17 01:45:04,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2023-02-17 01:45:04,794 INFO L87 Difference]: Start difference. First operand 244 states and 337 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 01:45:05,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:05,688 INFO L93 Difference]: Finished difference Result 295 states and 403 transitions. [2023-02-17 01:45:05,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-17 01:45:05,688 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) Word has length 123 [2023-02-17 01:45:05,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:05,690 INFO L225 Difference]: With dead ends: 295 [2023-02-17 01:45:05,690 INFO L226 Difference]: Without dead ends: 293 [2023-02-17 01:45:05,691 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=221, Invalid=1185, Unknown=0, NotChecked=0, Total=1406 [2023-02-17 01:45:05,691 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 34 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 951 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:05,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 222 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 951 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-17 01:45:05,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2023-02-17 01:45:05,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 287. [2023-02-17 01:45:05,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 155 states have (on average 1.1483870967741936) internal successors, (178), 159 states have internal predecessors, (178), 109 states have call successors, (109), 22 states have call predecessors, (109), 22 states have return successors, (108), 105 states have call predecessors, (108), 108 states have call successors, (108) [2023-02-17 01:45:05,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 395 transitions. [2023-02-17 01:45:05,817 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 395 transitions. Word has length 123 [2023-02-17 01:45:05,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:05,817 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 395 transitions. [2023-02-17 01:45:05,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (20), 8 states have call predecessors, (20), 6 states have call successors, (20) [2023-02-17 01:45:05,817 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 395 transitions. [2023-02-17 01:45:05,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-02-17 01:45:05,825 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:05,826 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 01:45:05,830 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 01:45:06,028 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 01:45:06,028 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:06,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:06,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1816082155, now seen corresponding path program 2 times [2023-02-17 01:45:06,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:06,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761434597] [2023-02-17 01:45:06,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:06,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:06,036 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:06,036 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090699256] [2023-02-17 01:45:06,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-17 01:45:06,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:06,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:06,042 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 01:45:06,043 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 01:45:06,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-17 01:45:06,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:45:06,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-17 01:45:06,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:06,249 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 01:45:06,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:07,166 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 01:45:07,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:07,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761434597] [2023-02-17 01:45:07,166 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:07,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090699256] [2023-02-17 01:45:07,166 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090699256] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:07,167 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:07,167 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 28 [2023-02-17 01:45:07,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474162571] [2023-02-17 01:45:07,167 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:07,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-17 01:45:07,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-17 01:45:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2023-02-17 01:45:07,168 INFO L87 Difference]: Start difference. First operand 287 states and 395 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 01:45:28,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:28,564 INFO L93 Difference]: Finished difference Result 394 states and 556 transitions. [2023-02-17 01:45:28,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-17 01:45:28,565 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 01:45:28,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:28,569 INFO L225 Difference]: With dead ends: 394 [2023-02-17 01:45:28,569 INFO L226 Difference]: Without dead ends: 386 [2023-02-17 01:45:28,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 239 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=855, Invalid=4114, Unknown=1, NotChecked=0, Total=4970 [2023-02-17 01:45:28,572 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 182 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 1786 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 2154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 1786 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:28,572 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 652 Invalid, 2154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 1786 Invalid, 0 Unknown, 0 Unchecked, 13.5s Time] [2023-02-17 01:45:28,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2023-02-17 01:45:28,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 345. [2023-02-17 01:45:28,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 183 states have (on average 1.1530054644808743) internal successors, (211), 188 states have internal predecessors, (211), 137 states have call successors, (137), 24 states have call predecessors, (137), 24 states have return successors, (136), 132 states have call predecessors, (136), 136 states have call successors, (136) [2023-02-17 01:45:28,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 484 transitions. [2023-02-17 01:45:28,811 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 484 transitions. Word has length 134 [2023-02-17 01:45:28,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:28,812 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 484 transitions. [2023-02-17 01:45:28,812 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 01:45:28,812 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 484 transitions. [2023-02-17 01:45:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-02-17 01:45:28,813 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:28,813 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 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 01:45:28,820 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 01:45:29,018 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 01:45:29,019 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:29,020 INFO L85 PathProgramCache]: Analyzing trace with hash -1419250666, now seen corresponding path program 4 times [2023-02-17 01:45:29,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:29,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114711498] [2023-02-17 01:45:29,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:29,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:29,028 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:29,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [147397328] [2023-02-17 01:45:29,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:45:29,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:29,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:29,030 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 01:45:29,032 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 01:45:29,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:45:29,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:45:29,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 75 conjunts are in the unsatisfiable core [2023-02-17 01:45:29,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 89 proven. 81 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2023-02-17 01:45:29,289 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 88 proven. 58 refuted. 0 times theorem prover too weak. 621 trivial. 0 not checked. [2023-02-17 01:45:30,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:30,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114711498] [2023-02-17 01:45:30,353 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:30,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147397328] [2023-02-17 01:45:30,353 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147397328] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:30,353 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:30,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 32 [2023-02-17 01:45:30,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860520914] [2023-02-17 01:45:30,354 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:30,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 01:45:30,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:30,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 01:45:30,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2023-02-17 01:45:30,355 INFO L87 Difference]: Start difference. First operand 345 states and 484 transitions. Second operand has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 17 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 17 states have call predecessors, (48), 15 states have call successors, (48) [2023-02-17 01:45:41,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:45:41,495 INFO L93 Difference]: Finished difference Result 413 states and 578 transitions. [2023-02-17 01:45:41,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-17 01:45:41,496 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 17 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 17 states have call predecessors, (48), 15 states have call successors, (48) Word has length 145 [2023-02-17 01:45:41,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:45:41,498 INFO L225 Difference]: With dead ends: 413 [2023-02-17 01:45:41,498 INFO L226 Difference]: Without dead ends: 411 [2023-02-17 01:45:41,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=563, Invalid=2517, Unknown=0, NotChecked=0, Total=3080 [2023-02-17 01:45:41,499 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 164 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2023-02-17 01:45:41,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 278 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2023-02-17 01:45:41,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2023-02-17 01:45:41,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 391. [2023-02-17 01:45:41,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 207 states have (on average 1.1545893719806763) internal successors, (239), 213 states have internal predecessors, (239), 156 states have call successors, (156), 27 states have call predecessors, (156), 27 states have return successors, (155), 150 states have call predecessors, (155), 155 states have call successors, (155) [2023-02-17 01:45:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 550 transitions. [2023-02-17 01:45:41,766 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 550 transitions. Word has length 145 [2023-02-17 01:45:41,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:45:41,767 INFO L495 AbstractCegarLoop]: Abstraction has 391 states and 550 transitions. [2023-02-17 01:45:41,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 28 states have internal predecessors, (59), 17 states have call successors, (49), 3 states have call predecessors, (49), 3 states have return successors, (48), 17 states have call predecessors, (48), 15 states have call successors, (48) [2023-02-17 01:45:41,768 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 550 transitions. [2023-02-17 01:45:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2023-02-17 01:45:41,771 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:45:41,771 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 01:45:41,778 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 01:45:41,976 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 01:45:41,976 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:45:41,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:45:41,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1798457687, now seen corresponding path program 5 times [2023-02-17 01:45:41,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:45:41,977 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729283640] [2023-02-17 01:45:41,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:45:41,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:45:41,984 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:45:41,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [527114194] [2023-02-17 01:45:41,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 01:45:41,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:45:41,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:45:41,986 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 01:45:41,998 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 01:45:42,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-17 01:45:42,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:45:42,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 70 conjunts are in the unsatisfiable core [2023-02-17 01:45:42,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:45:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 94 proven. 76 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2023-02-17 01:45:42,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:45:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 845 backedges. 91 proven. 64 refuted. 0 times theorem prover too weak. 690 trivial. 0 not checked. [2023-02-17 01:45:43,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:45:43,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729283640] [2023-02-17 01:45:43,563 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:45:43,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527114194] [2023-02-17 01:45:43,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527114194] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:45:43,564 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:45:43,564 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2023-02-17 01:45:43,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912480301] [2023-02-17 01:45:43,564 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:45:43,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-02-17 01:45:43,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:45:43,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-02-17 01:45:43,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2023-02-17 01:45:43,567 INFO L87 Difference]: Start difference. First operand 391 states and 550 transitions. Second operand has 30 states, 29 states have (on average 2.0) internal successors, (58), 27 states have internal predecessors, (58), 15 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 15 states have call predecessors, (49), 14 states have call successors, (49) [2023-02-17 01:45:50,540 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 [] [2023-02-17 01:45:53,150 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:45:55,316 WARN L539 Checker$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 01:45:57,448 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:00,291 WARN L539 Checker$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 01:46:04,970 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:07,122 WARN L539 Checker$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 01:46:10,732 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:13,095 WARN L539 Checker$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 01:46:16,330 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:18,340 WARN L539 Checker$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 01:46:25,805 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:28,363 WARN L539 Checker$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 01:46:30,369 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:32,371 WARN L539 Checker$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 01:46:38,089 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-17 01:46:41,698 WARN L539 Checker$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 01:46:43,966 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 01:46:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:46:45,345 INFO L93 Difference]: Finished difference Result 496 states and 708 transitions. [2023-02-17 01:46:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-17 01:46:45,345 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 27 states have internal predecessors, (58), 15 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 15 states have call predecessors, (49), 14 states have call successors, (49) Word has length 150 [2023-02-17 01:46:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:46:45,347 INFO L225 Difference]: With dead ends: 496 [2023-02-17 01:46:45,347 INFO L226 Difference]: Without dead ends: 494 [2023-02-17 01:46:45,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 269 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=599, Invalid=2048, Unknown=5, NotChecked=0, Total=2652 [2023-02-17 01:46:45,349 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 127 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 248 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 47.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.1s IncrementalHoareTripleChecker+Time [2023-02-17 01:46:45,349 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 312 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1923 Invalid, 18 Unknown, 0 Unchecked, 48.1s Time] [2023-02-17 01:46:45,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2023-02-17 01:46:45,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 481. [2023-02-17 01:46:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 251 states have (on average 1.159362549800797) internal successors, (291), 259 states have internal predecessors, (291), 199 states have call successors, (199), 30 states have call predecessors, (199), 30 states have return successors, (198), 191 states have call predecessors, (198), 198 states have call successors, (198) [2023-02-17 01:46:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 688 transitions. [2023-02-17 01:46:45,765 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 688 transitions. Word has length 150 [2023-02-17 01:46:45,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:46:45,765 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 688 transitions. [2023-02-17 01:46:45,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.0) internal successors, (58), 27 states have internal predecessors, (58), 15 states have call successors, (50), 3 states have call predecessors, (50), 3 states have return successors, (49), 15 states have call predecessors, (49), 14 states have call successors, (49) [2023-02-17 01:46:45,765 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 688 transitions. [2023-02-17 01:46:45,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-02-17 01:46:45,767 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:46:45,767 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 01:46:45,772 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 01:46:45,972 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 01:46:45,972 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:46:45,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:46:45,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1812352379, now seen corresponding path program 3 times [2023-02-17 01:46:45,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:46:45,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765055936] [2023-02-17 01:46:45,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:46:45,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:46:45,980 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:46:45,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42682003] [2023-02-17 01:46:45,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-17 01:46:45,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:46:45,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:46:45,981 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 01:46:45,986 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 01:46:46,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-02-17 01:46:46,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:46:46,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 49 conjunts are in the unsatisfiable core [2023-02-17 01:46:46,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:46:46,171 INFO L134 CoverageAnalysis]: Checked inductivity of 922 backedges. 104 proven. 43 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2023-02-17 01:46:46,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:46:48,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:46:48,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765055936] [2023-02-17 01:46:48,452 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:46:48,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42682003] [2023-02-17 01:46:48,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42682003] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:46:48,452 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:46:48,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-02-17 01:46:48,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363644752] [2023-02-17 01:46:48,453 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:46:48,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-17 01:46:48,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:46:48,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-17 01:46:48,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=430, Unknown=1, NotChecked=0, Total=506 [2023-02-17 01:46:48,454 INFO L87 Difference]: Start difference. First operand 481 states and 688 transitions. Second operand has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-17 01:46:49,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:46:49,143 INFO L93 Difference]: Finished difference Result 512 states and 726 transitions. [2023-02-17 01:46:49,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-17 01:46:49,144 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 5 states have call successors, (14) Word has length 153 [2023-02-17 01:46:49,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:46:49,146 INFO L225 Difference]: With dead ends: 512 [2023-02-17 01:46:49,146 INFO L226 Difference]: Without dead ends: 505 [2023-02-17 01:46:49,153 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=128, Invalid=683, Unknown=1, NotChecked=0, Total=812 [2023-02-17 01:46:49,153 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 453 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:46:49,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 144 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 453 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-17 01:46:49,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2023-02-17 01:46:49,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 486. [2023-02-17 01:46:49,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 254 states have (on average 1.1535433070866141) internal successors, (293), 262 states have internal predecessors, (293), 199 states have call successors, (199), 32 states have call predecessors, (199), 32 states have return successors, (198), 191 states have call predecessors, (198), 198 states have call successors, (198) [2023-02-17 01:46:49,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 690 transitions. [2023-02-17 01:46:49,581 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 690 transitions. Word has length 153 [2023-02-17 01:46:49,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:46:49,582 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 690 transitions. [2023-02-17 01:46:49,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 6 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 5 states have call successors, (14) [2023-02-17 01:46:49,582 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 690 transitions. [2023-02-17 01:46:49,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-02-17 01:46:49,583 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:46:49,583 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-17 01:46:49,588 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 01:46:49,788 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 01:46:49,788 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:46:49,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:46:49,789 INFO L85 PathProgramCache]: Analyzing trace with hash 997653913, now seen corresponding path program 6 times [2023-02-17 01:46:49,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:46:49,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972254631] [2023-02-17 01:46:49,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:46:49,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:46:49,800 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:46:49,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1564210229] [2023-02-17 01:46:49,801 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-17 01:46:49,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:46:49,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:46:49,808 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 01:46:49,838 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 01:46:49,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-17 01:46:49,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:46:49,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-17 01:46:49,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:46:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1115 backedges. 127 proven. 82 refuted. 0 times theorem prover too weak. 906 trivial. 0 not checked. [2023-02-17 01:46:50,152 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:46:52,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:46:52,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972254631] [2023-02-17 01:46:52,285 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:46:52,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564210229] [2023-02-17 01:46:52,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564210229] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:46:52,285 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:46:52,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2023-02-17 01:46:52,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716888313] [2023-02-17 01:46:52,285 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:46:52,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-17 01:46:52,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:46:52,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-17 01:46:52,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=684, Unknown=0, NotChecked=0, Total=812 [2023-02-17 01:46:52,287 INFO L87 Difference]: Start difference. First operand 486 states and 690 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 9 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 8 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-17 01:46:53,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:46:53,792 INFO L93 Difference]: Finished difference Result 532 states and 753 transitions. [2023-02-17 01:46:53,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-17 01:46:53,792 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 9 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 8 states have call predecessors, (28), 9 states have call successors, (28) Word has length 167 [2023-02-17 01:46:53,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:46:53,794 INFO L225 Difference]: With dead ends: 532 [2023-02-17 01:46:53,795 INFO L226 Difference]: Without dead ends: 530 [2023-02-17 01:46:53,795 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2023-02-17 01:46:53,796 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 33 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 1144 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 1172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-17 01:46:53,796 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 274 Invalid, 1172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1144 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-17 01:46:53,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2023-02-17 01:46:54,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 525. [2023-02-17 01:46:54,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 525 states, 274 states have (on average 1.1569343065693432) internal successors, (317), 282 states have internal predecessors, (317), 215 states have call successors, (215), 35 states have call predecessors, (215), 35 states have return successors, (214), 207 states have call predecessors, (214), 214 states have call successors, (214) [2023-02-17 01:46:54,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 525 states to 525 states and 746 transitions. [2023-02-17 01:46:54,271 INFO L78 Accepts]: Start accepts. Automaton has 525 states and 746 transitions. Word has length 167 [2023-02-17 01:46:54,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:46:54,272 INFO L495 AbstractCegarLoop]: Abstraction has 525 states and 746 transitions. [2023-02-17 01:46:54,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 9 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (28), 8 states have call predecessors, (28), 9 states have call successors, (28) [2023-02-17 01:46:54,272 INFO L276 IsEmpty]: Start isEmpty. Operand 525 states and 746 transitions. [2023-02-17 01:46:54,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-02-17 01:46:54,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:46:54,274 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 01:46:54,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-17 01:46:54,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:46:54,479 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:46:54,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:46:54,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2095255219, now seen corresponding path program 7 times [2023-02-17 01:46:54,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:46:54,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321557291] [2023-02-17 01:46:54,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:46:54,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:46:54,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:46:54,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2051995243] [2023-02-17 01:46:54,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-17 01:46:54,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:46:54,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:46:54,488 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:46:54,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-17 01:46:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-17 01:46:54,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 126 conjunts are in the unsatisfiable core [2023-02-17 01:46:54,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:46:55,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1218 backedges. 328 proven. 148 refuted. 0 times theorem prover too weak. 742 trivial. 0 not checked. [2023-02-17 01:46:55,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:47:42,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:47:42,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321557291] [2023-02-17 01:47:42,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:47:42,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051995243] [2023-02-17 01:47:42,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051995243] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-17 01:47:42,890 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-02-17 01:47:42,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2023-02-17 01:47:42,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595822878] [2023-02-17 01:47:42,891 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-02-17 01:47:42,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-17 01:47:42,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:47:42,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-17 01:47:42,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1152, Unknown=15, NotChecked=0, Total=1482 [2023-02-17 01:47:42,892 INFO L87 Difference]: Start difference. First operand 525 states and 746 transitions. Second operand has 25 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 13 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2023-02-17 01:47:47,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:47:47,866 INFO L93 Difference]: Finished difference Result 585 states and 819 transitions. [2023-02-17 01:47:47,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-17 01:47:47,866 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 13 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) Word has length 175 [2023-02-17 01:47:47,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:47:47,869 INFO L225 Difference]: With dead ends: 585 [2023-02-17 01:47:47,869 INFO L226 Difference]: Without dead ends: 583 [2023-02-17 01:47:47,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 205 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 50.5s TimeCoverageRelationStatistics Valid=470, Invalid=1866, Unknown=16, NotChecked=0, Total=2352 [2023-02-17 01:47:47,870 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 55 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 1766 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-17 01:47:47,870 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 306 Invalid, 1766 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-17 01:47:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-02-17 01:47:48,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 576. [2023-02-17 01:47:48,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 303 states have (on average 1.1518151815181519) internal successors, (349), 311 states have internal predecessors, (349), 231 states have call successors, (231), 41 states have call predecessors, (231), 41 states have return successors, (230), 223 states have call predecessors, (230), 230 states have call successors, (230) [2023-02-17 01:47:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 810 transitions. [2023-02-17 01:47:48,369 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 810 transitions. Word has length 175 [2023-02-17 01:47:48,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:47:48,369 INFO L495 AbstractCegarLoop]: Abstraction has 576 states and 810 transitions. [2023-02-17 01:47:48,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 1.8636363636363635) internal successors, (41), 19 states have internal predecessors, (41), 13 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (29), 13 states have call predecessors, (29), 13 states have call successors, (29) [2023-02-17 01:47:48,369 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 810 transitions. [2023-02-17 01:47:48,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-02-17 01:47:48,371 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:47:48,371 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 01:47:48,378 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-17 01:47:48,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:47:48,576 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:47:48,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:47:48,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1493603019, now seen corresponding path program 4 times [2023-02-17 01:47:48,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:47:48,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637301486] [2023-02-17 01:47:48,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:47:48,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:47:48,584 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:47:48,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1636443618] [2023-02-17 01:47:48,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-17 01:47:48,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:47:48,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:47:48,605 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:47:48,608 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-17 01:47:48,684 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-17 01:47:48,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:47:48,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 78 conjunts are in the unsatisfiable core [2023-02-17 01:47:48,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:47:48,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 51 proven. 118 refuted. 0 times theorem prover too weak. 1140 trivial. 0 not checked. [2023-02-17 01:47:48,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:47:53,814 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 01:47:53,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:47:53,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637301486] [2023-02-17 01:47:53,815 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:47:53,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636443618] [2023-02-17 01:47:53,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636443618] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:47:53,815 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:47:53,816 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2023-02-17 01:47:53,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684949728] [2023-02-17 01:47:53,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:47:53,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-17 01:47:53,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:47:53,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-17 01:47:53,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2023-02-17 01:47:53,817 INFO L87 Difference]: Start difference. First operand 576 states and 810 transitions. Second operand has 32 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 19 states have call successors, (61), 3 states have call predecessors, (61), 2 states have return successors, (60), 17 states have call predecessors, (60), 17 states have call successors, (60) [2023-02-17 01:48:32,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-17 01:48:32,195 INFO L93 Difference]: Finished difference Result 882 states and 1283 transitions. [2023-02-17 01:48:32,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-02-17 01:48:32,198 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 19 states have call successors, (61), 3 states have call predecessors, (61), 2 states have return successors, (60), 17 states have call predecessors, (60), 17 states have call successors, (60) Word has length 178 [2023-02-17 01:48:32,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-17 01:48:32,205 INFO L225 Difference]: With dead ends: 882 [2023-02-17 01:48:32,205 INFO L226 Difference]: Without dead ends: 777 [2023-02-17 01:48:32,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 323 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=1302, Invalid=5018, Unknown=0, NotChecked=0, Total=6320 [2023-02-17 01:48:32,207 INFO L413 NwaCegarLoop]: 121 mSDtfsCounter, 249 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 2157 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 27.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 2744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 2157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 27.2s IncrementalHoareTripleChecker+Time [2023-02-17 01:48:32,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 786 Invalid, 2744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 2157 Invalid, 0 Unknown, 0 Unchecked, 27.2s Time] [2023-02-17 01:48:32,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2023-02-17 01:48:32,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 720. [2023-02-17 01:48:32,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 365 states have (on average 1.16986301369863) internal successors, (427), 372 states have internal predecessors, (427), 311 states have call successors, (311), 43 states have call predecessors, (311), 43 states have return successors, (310), 304 states have call predecessors, (310), 310 states have call successors, (310) [2023-02-17 01:48:32,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1048 transitions. [2023-02-17 01:48:32,941 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1048 transitions. Word has length 178 [2023-02-17 01:48:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-17 01:48:32,941 INFO L495 AbstractCegarLoop]: Abstraction has 720 states and 1048 transitions. [2023-02-17 01:48:32,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 19 states have call successors, (61), 3 states have call predecessors, (61), 2 states have return successors, (60), 17 states have call predecessors, (60), 17 states have call successors, (60) [2023-02-17 01:48:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1048 transitions. [2023-02-17 01:48:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2023-02-17 01:48:32,943 INFO L187 NwaCegarLoop]: Found error trace [2023-02-17 01:48:32,943 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 01:48:32,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-02-17 01:48:33,148 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:48:33,148 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-17 01:48:33,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-17 01:48:33,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1847000169, now seen corresponding path program 5 times [2023-02-17 01:48:33,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-17 01:48:33,149 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807191712] [2023-02-17 01:48:33,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-17 01:48:33,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-17 01:48:33,155 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-17 01:48:33,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [943625] [2023-02-17 01:48:33,156 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-17 01:48:33,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-17 01:48:33,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-17 01:48:33,157 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-17 01:48:33,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-17 01:48:33,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-17 01:48:33,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-17 01:48:33,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 73 conjunts are in the unsatisfiable core [2023-02-17 01:48:33,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-17 01:48:33,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1309 backedges. 48 proven. 112 refuted. 0 times theorem prover too weak. 1149 trivial. 0 not checked. [2023-02-17 01:48:33,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-17 01:48:37,072 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 01:48:37,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-17 01:48:37,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807191712] [2023-02-17 01:48:37,073 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-17 01:48:37,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943625] [2023-02-17 01:48:37,073 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943625] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-17 01:48:37,073 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-17 01:48:37,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2023-02-17 01:48:37,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173463284] [2023-02-17 01:48:37,073 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-17 01:48:37,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-02-17 01:48:37,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-17 01:48:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-02-17 01:48:37,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=790, Unknown=0, NotChecked=0, Total=930 [2023-02-17 01:48:37,076 INFO L87 Difference]: Start difference. First operand 720 states and 1048 transitions. Second operand has 31 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 29 states have internal predecessors, (60), 18 states have call successors, (61), 3 states have call predecessors, (61), 2 states have return successors, (60), 16 states have call predecessors, (60), 16 states have call successors, (60)