./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-patterns/array18_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e1ff0e6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-patterns/array18_pattern.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 4d58909a91b196e39d7623dd2e1e4d9b2698d6fa8ff06c2897eb5762e2e2e408 --- Real Ultimate output --- This is Ultimate 0.2.2-?-7e1ff0e [2023-02-14 21:52:17,643 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-14 21:52:17,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-14 21:52:17,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-14 21:52:17,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-14 21:52:17,669 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-14 21:52:17,670 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-14 21:52:17,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-14 21:52:17,672 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-14 21:52:17,672 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-14 21:52:17,673 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-14 21:52:17,674 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-14 21:52:17,674 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-14 21:52:17,675 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-14 21:52:17,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-14 21:52:17,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-14 21:52:17,677 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-14 21:52:17,677 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-14 21:52:17,678 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-14 21:52:17,679 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-14 21:52:17,680 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-14 21:52:17,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-14 21:52:17,685 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-14 21:52:17,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-14 21:52:17,687 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-14 21:52:17,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-14 21:52:17,690 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-14 21:52:17,693 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-14 21:52:17,693 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-14 21:52:17,694 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-14 21:52:17,694 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-14 21:52:17,695 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-14 21:52:17,695 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-14 21:52:17,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-14 21:52:17,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-14 21:52:17,698 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-14 21:52:17,698 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-14 21:52:17,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-14 21:52:17,699 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-14 21:52:17,699 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-14 21:52:17,700 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-14 21:52:17,701 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-14 21:52:17,722 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-14 21:52:17,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-14 21:52:17,723 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-14 21:52:17,723 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-14 21:52:17,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-14 21:52:17,729 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-14 21:52:17,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-14 21:52:17,730 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-14 21:52:17,730 INFO L138 SettingsManager]: * Use SBE=true [2023-02-14 21:52:17,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-14 21:52:17,730 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-14 21:52:17,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-14 21:52:17,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-14 21:52:17,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-14 21:52:17,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-14 21:52:17,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-14 21:52:17,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-14 21:52:17,731 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-14 21:52:17,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-14 21:52:17,731 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-14 21:52:17,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-14 21:52:17,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-14 21:52:17,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-14 21:52:17,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-14 21:52:17,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:52:17,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-14 21:52:17,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-14 21:52:17,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-14 21:52:17,733 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-14 21:52:17,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-14 21:52:17,733 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-14 21:52:17,733 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-14 21:52:17,733 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-14 21:52:17,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-14 21:52:17,734 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-14 21:52:17,734 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d58909a91b196e39d7623dd2e1e4d9b2698d6fa8ff06c2897eb5762e2e2e408 [2023-02-14 21:52:17,862 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-14 21:52:17,874 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-14 21:52:17,875 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-14 21:52:17,876 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-14 21:52:17,876 INFO L275 PluginConnector]: CDTParser initialized [2023-02-14 21:52:17,877 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-patterns/array18_pattern.c [2023-02-14 21:52:18,799 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-14 21:52:18,923 INFO L351 CDTParser]: Found 1 translation units. [2023-02-14 21:52:18,924 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-patterns/array18_pattern.c [2023-02-14 21:52:18,928 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c32dbf6/2f4623db449747c19346a43caee55485/FLAG9bb03ac87 [2023-02-14 21:52:19,361 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/17c32dbf6/2f4623db449747c19346a43caee55485 [2023-02-14 21:52:19,362 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-14 21:52:19,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-14 21:52:19,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-14 21:52:19,365 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-14 21:52:19,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-14 21:52:19,370 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:52:19" (1/1) ... [2023-02-14 21:52:19,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ac7e6c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19, skipping insertion in model container [2023-02-14 21:52:19,371 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.02 09:52:19" (1/1) ... [2023-02-14 21:52:19,375 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-14 21:52:19,388 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-14 21:52:19,469 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/array-patterns/array18_pattern.c[1444,1457] [2023-02-14 21:52:19,481 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:52:19,486 INFO L203 MainTranslator]: Completed pre-run [2023-02-14 21:52:19,493 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/array-patterns/array18_pattern.c[1444,1457] [2023-02-14 21:52:19,504 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-14 21:52:19,512 INFO L208 MainTranslator]: Completed translation [2023-02-14 21:52:19,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19 WrapperNode [2023-02-14 21:52:19,513 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-14 21:52:19,514 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-14 21:52:19,514 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-14 21:52:19,514 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-14 21:52:19,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19" (1/1) ... [2023-02-14 21:52:19,522 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19" (1/1) ... [2023-02-14 21:52:19,537 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 102 [2023-02-14 21:52:19,537 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-14 21:52:19,537 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-14 21:52:19,538 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-14 21:52:19,538 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-14 21:52:19,542 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19" (1/1) ... [2023-02-14 21:52:19,542 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19" (1/1) ... [2023-02-14 21:52:19,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19" (1/1) ... [2023-02-14 21:52:19,544 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19" (1/1) ... [2023-02-14 21:52:19,547 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19" (1/1) ... [2023-02-14 21:52:19,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19" (1/1) ... [2023-02-14 21:52:19,550 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19" (1/1) ... [2023-02-14 21:52:19,550 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19" (1/1) ... [2023-02-14 21:52:19,552 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-14 21:52:19,552 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-14 21:52:19,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-14 21:52:19,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-14 21:52:19,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19" (1/1) ... [2023-02-14 21:52:19,557 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-14 21:52:19,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:52:19,573 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-14 21:52:19,578 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-14 21:52:19,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-14 21:52:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-02-14 21:52:19,620 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-02-14 21:52:19,620 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-14 21:52:19,621 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-14 21:52:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-14 21:52:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-14 21:52:19,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-14 21:52:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-14 21:52:19,622 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-14 21:52:19,688 INFO L235 CfgBuilder]: Building ICFG [2023-02-14 21:52:19,702 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-14 21:52:19,865 INFO L276 CfgBuilder]: Performing block encoding [2023-02-14 21:52:19,868 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-14 21:52:19,869 INFO L300 CfgBuilder]: Removed 5 assume(true) statements. [2023-02-14 21:52:19,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:52:19 BoogieIcfgContainer [2023-02-14 21:52:19,870 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-14 21:52:19,871 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-14 21:52:19,871 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-14 21:52:19,873 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-14 21:52:19,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.02 09:52:19" (1/3) ... [2023-02-14 21:52:19,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52aa2e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:52:19, skipping insertion in model container [2023-02-14 21:52:19,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.02 09:52:19" (2/3) ... [2023-02-14 21:52:19,874 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52aa2e23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.02 09:52:19, skipping insertion in model container [2023-02-14 21:52:19,874 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.02 09:52:19" (3/3) ... [2023-02-14 21:52:19,875 INFO L112 eAbstractionObserver]: Analyzing ICFG array18_pattern.c [2023-02-14 21:52:19,885 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-14 21:52:19,885 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-14 21:52:19,913 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-14 21:52:19,917 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;@3a8168e0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-14 21:52:19,917 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-14 21:52:19,920 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:52:19,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-02-14 21:52:19,924 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:52:19,925 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:52:19,925 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:52:19,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:52:19,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2132324569, now seen corresponding path program 1 times [2023-02-14 21:52:19,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:52:19,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730679668] [2023-02-14 21:52:19,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:19,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:52:19,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:52:20,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:52:20,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730679668] [2023-02-14 21:52:20,003 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-02-14 21:52:20,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951871906] [2023-02-14 21:52:20,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:20,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:52:20,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:52:20,006 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:52:20,016 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-14 21:52:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:52:20,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2023-02-14 21:52:20,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:52:20,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-14 21:52:20,080 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 21:52:20,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951871906] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:52:20,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:52:20,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-14 21:52:20,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850765839] [2023-02-14 21:52:20,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:52:20,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-14 21:52:20,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:52:20,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-14 21:52:20,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 21:52:20,123 INFO L87 Difference]: Start difference. First operand has 33 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 21:52:20,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:52:20,139 INFO L93 Difference]: Finished difference Result 63 states and 97 transitions. [2023-02-14 21:52:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-14 21:52:20,141 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2023-02-14 21:52:20,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:52:20,145 INFO L225 Difference]: With dead ends: 63 [2023-02-14 21:52:20,145 INFO L226 Difference]: Without dead ends: 29 [2023-02-14 21:52:20,147 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-14 21:52:20,150 INFO L413 NwaCegarLoop]: 41 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, 41 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:52:20,152 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:52:20,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-02-14 21:52:20,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-02-14 21:52:20,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 24 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:52:20,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 37 transitions. [2023-02-14 21:52:20,179 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 37 transitions. Word has length 15 [2023-02-14 21:52:20,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:52:20,180 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 37 transitions. [2023-02-14 21:52:20,180 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-14 21:52:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 37 transitions. [2023-02-14 21:52:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-02-14 21:52:20,181 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:52:20,182 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:52:20,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-14 21:52:20,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-02-14 21:52:20,390 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:52:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:52:20,391 INFO L85 PathProgramCache]: Analyzing trace with hash 1872922357, now seen corresponding path program 1 times [2023-02-14 21:52:20,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:52:20,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619451807] [2023-02-14 21:52:20,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:20,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:52:20,415 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:52:20,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1868278678] [2023-02-14 21:52:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:20,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:52:20,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:52:20,422 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:52:20,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-14 21:52:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:52:20,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-14 21:52:20,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:52:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 21:52:20,526 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 21:52:20,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:52:20,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619451807] [2023-02-14 21:52:20,527 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:52:20,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868278678] [2023-02-14 21:52:20,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868278678] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:52:20,527 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:52:20,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 21:52:20,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297999072] [2023-02-14 21:52:20,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:52:20,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 21:52:20,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:52:20,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 21:52:20,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 21:52:20,530 INFO L87 Difference]: Start difference. First operand 29 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:52:20,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:52:20,555 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2023-02-14 21:52:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 21:52:20,555 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2023-02-14 21:52:20,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:52:20,556 INFO L225 Difference]: With dead ends: 36 [2023-02-14 21:52:20,556 INFO L226 Difference]: Without dead ends: 32 [2023-02-14 21:52:20,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 21:52:20,557 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 12 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:52:20,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 84 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:52:20,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-14 21:52:20,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-02-14 21:52:20,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:52:20,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2023-02-14 21:52:20,562 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 30 [2023-02-14 21:52:20,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:52:20,563 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2023-02-14 21:52:20,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:52:20,564 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2023-02-14 21:52:20,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-14 21:52:20,564 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:52:20,565 INFO L195 NwaCegarLoop]: trace histogram [3, 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] [2023-02-14 21:52:20,571 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-14 21:52:20,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-02-14 21:52:20,772 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:52:20,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:52:20,773 INFO L85 PathProgramCache]: Analyzing trace with hash 212512359, now seen corresponding path program 1 times [2023-02-14 21:52:20,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:52:20,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728047863] [2023-02-14 21:52:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:20,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:52:20,791 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:52:20,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148771597] [2023-02-14 21:52:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:20,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:52:20,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:52:20,798 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:52:20,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-14 21:52:20,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:52:20,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 21:52:20,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:52:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 21:52:20,930 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 21:52:20,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:52:20,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728047863] [2023-02-14 21:52:20,930 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:52:20,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148771597] [2023-02-14 21:52:20,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148771597] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:52:20,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:52:20,931 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-14 21:52:20,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147535002] [2023-02-14 21:52:20,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:52:20,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-14 21:52:20,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:52:20,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-14 21:52:20,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-14 21:52:20,933 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:52:20,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:52:20,990 INFO L93 Difference]: Finished difference Result 67 states and 86 transitions. [2023-02-14 21:52:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-14 21:52:20,991 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2023-02-14 21:52:20,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:52:20,992 INFO L225 Difference]: With dead ends: 67 [2023-02-14 21:52:20,992 INFO L226 Difference]: Without dead ends: 42 [2023-02-14 21:52:20,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-02-14 21:52:20,993 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:52:20,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 98 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:52:20,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-02-14 21:52:20,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 33. [2023-02-14 21:52:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:52:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2023-02-14 21:52:20,998 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 35 [2023-02-14 21:52:20,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:52:20,998 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2023-02-14 21:52:20,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:52:20,998 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2023-02-14 21:52:20,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-02-14 21:52:20,999 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:52:20,999 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1] [2023-02-14 21:52:21,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-14 21:52:21,206 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:52:21,206 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:52:21,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:52:21,207 INFO L85 PathProgramCache]: Analyzing trace with hash -654332553, now seen corresponding path program 1 times [2023-02-14 21:52:21,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:52:21,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574780549] [2023-02-14 21:52:21,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:21,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:52:21,225 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:52:21,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1426390371] [2023-02-14 21:52:21,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:21,226 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:52:21,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:52:21,233 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:52:21,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-14 21:52:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:52:21,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-14 21:52:21,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:52:21,297 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 21:52:21,298 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-14 21:52:21,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:52:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574780549] [2023-02-14 21:52:21,298 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:52:21,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426390371] [2023-02-14 21:52:21,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426390371] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-14 21:52:21,298 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-14 21:52:21,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-02-14 21:52:21,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410835617] [2023-02-14 21:52:21,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-14 21:52:21,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-02-14 21:52:21,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:52:21,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-02-14 21:52:21,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-02-14 21:52:21,300 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:52:21,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:52:21,332 INFO L93 Difference]: Finished difference Result 64 states and 83 transitions. [2023-02-14 21:52:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-02-14 21:52:21,332 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 38 [2023-02-14 21:52:21,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:52:21,333 INFO L225 Difference]: With dead ends: 64 [2023-02-14 21:52:21,333 INFO L226 Difference]: Without dead ends: 36 [2023-02-14 21:52:21,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-02-14 21:52:21,334 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 28 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-14 21:52:21,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 53 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-14 21:52:21,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-14 21:52:21,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2023-02-14 21:52:21,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:52:21,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 41 transitions. [2023-02-14 21:52:21,352 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 41 transitions. Word has length 38 [2023-02-14 21:52:21,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:52:21,352 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 41 transitions. [2023-02-14 21:52:21,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2023-02-14 21:52:21,352 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 41 transitions. [2023-02-14 21:52:21,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 21:52:21,353 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:52:21,353 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1] [2023-02-14 21:52:21,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-14 21:52:21,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:52:21,557 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:52:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:52:21,558 INFO L85 PathProgramCache]: Analyzing trace with hash 579061941, now seen corresponding path program 1 times [2023-02-14 21:52:21,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:52:21,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857408819] [2023-02-14 21:52:21,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:21,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:52:21,571 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:52:21,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750967482] [2023-02-14 21:52:21,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:21,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:52:21,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:52:21,583 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:52:21,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-14 21:52:21,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:52:21,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-14 21:52:21,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:52:22,088 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 76 [2023-02-14 21:52:22,096 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 160 [2023-02-14 21:52:22,291 INFO L321 Elim1Store]: treesize reduction 20, result has 13.0 percent of original size [2023-02-14 21:52:22,292 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 10 [2023-02-14 21:52:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-14 21:52:22,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:52:22,431 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2023-02-14 21:52:22,444 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:52:22,445 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 161 [2023-02-14 21:52:22,497 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:52:22,497 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 765 treesize of output 758 [2023-02-14 21:52:25,742 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 21:52:25,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:52:25,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857408819] [2023-02-14 21:52:25,742 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:52:25,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750967482] [2023-02-14 21:52:25,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750967482] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:52:25,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 21:52:25,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 37 [2023-02-14 21:52:25,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569136454] [2023-02-14 21:52:25,742 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 21:52:25,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-14 21:52:25,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:52:25,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-14 21:52:25,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1143, Unknown=0, NotChecked=0, Total=1332 [2023-02-14 21:52:25,744 INFO L87 Difference]: Start difference. First operand 33 states and 41 transitions. Second operand has 37 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 21:52:33,521 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-02-14 21:52:42,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:52:42,928 INFO L93 Difference]: Finished difference Result 140 states and 175 transitions. [2023-02-14 21:52:42,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-14 21:52:42,929 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2023-02-14 21:52:42,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:52:42,930 INFO L225 Difference]: With dead ends: 140 [2023-02-14 21:52:42,930 INFO L226 Difference]: Without dead ends: 113 [2023-02-14 21:52:42,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1773 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1038, Invalid=5124, Unknown=0, NotChecked=0, Total=6162 [2023-02-14 21:52:42,932 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 238 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 78 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 1165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-02-14 21:52:42,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 312 Invalid, 1165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 1086 Invalid, 1 Unknown, 0 Unchecked, 5.8s Time] [2023-02-14 21:52:42,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-14 21:52:42,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 70. [2023-02-14 21:52:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 61 states have (on average 1.278688524590164) internal successors, (78), 61 states have internal predecessors, (78), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-02-14 21:52:42,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2023-02-14 21:52:42,944 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 40 [2023-02-14 21:52:42,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:52:42,945 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2023-02-14 21:52:42,945 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 1.8) internal successors, (63), 34 states have internal predecessors, (63), 4 states have call successors, (6), 3 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 21:52:42,945 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2023-02-14 21:52:42,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-14 21:52:42,946 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:52:42,946 INFO L195 NwaCegarLoop]: trace histogram [3, 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, 1, 1, 1] [2023-02-14 21:52:42,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-14 21:52:43,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:52:43,147 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:52:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:52:43,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1287607751, now seen corresponding path program 1 times [2023-02-14 21:52:43,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:52:43,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272650394] [2023-02-14 21:52:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:43,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:52:43,156 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:52:43,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [120062059] [2023-02-14 21:52:43,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:43,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:52:43,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:52:43,158 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:52:43,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-14 21:52:43,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-14 21:52:43,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 21:52:43,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:52:43,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-14 21:52:43,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:52:43,515 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-02-14 21:52:43,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:52:43,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272650394] [2023-02-14 21:52:43,515 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:52:43,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120062059] [2023-02-14 21:52:43,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120062059] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:52:43,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 21:52:43,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2023-02-14 21:52:43,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247889056] [2023-02-14 21:52:43,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 21:52:43,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-02-14 21:52:43,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:52:43,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-02-14 21:52:43,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-02-14 21:52:43,517 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 18 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 21:52:43,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:52:43,834 INFO L93 Difference]: Finished difference Result 177 states and 214 transitions. [2023-02-14 21:52:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-14 21:52:43,835 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 40 [2023-02-14 21:52:43,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:52:43,839 INFO L225 Difference]: With dead ends: 177 [2023-02-14 21:52:43,839 INFO L226 Difference]: Without dead ends: 128 [2023-02-14 21:52:43,840 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2023-02-14 21:52:43,841 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 126 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-14 21:52:43,841 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 208 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-14 21:52:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-14 21:52:43,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 72. [2023-02-14 21:52:43,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 61 states have (on average 1.2131147540983607) internal successors, (74), 62 states have internal predecessors, (74), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 21:52:43,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2023-02-14 21:52:43,870 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 40 [2023-02-14 21:52:43,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:52:43,872 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2023-02-14 21:52:43,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.5625) internal successors, (41), 13 states have internal predecessors, (41), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2023-02-14 21:52:43,872 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2023-02-14 21:52:43,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 21:52:43,875 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:52:43,875 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2023-02-14 21:52:43,882 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-14 21:52:44,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:52:44,083 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:52:44,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:52:44,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1706965193, now seen corresponding path program 2 times [2023-02-14 21:52:44,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:52:44,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612791208] [2023-02-14 21:52:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:44,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:52:44,097 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:52:44,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [438100004] [2023-02-14 21:52:44,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 21:52:44,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:52:44,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:52:44,100 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:52:44,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-14 21:52:44,144 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 21:52:44,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:52:44,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 21:52:44,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:52:44,184 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-02-14 21:52:44,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:52:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-02-14 21:52:44,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:52:44,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612791208] [2023-02-14 21:52:44,221 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:52:44,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438100004] [2023-02-14 21:52:44,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438100004] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:52:44,221 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 21:52:44,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-14 21:52:44,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639093591] [2023-02-14 21:52:44,222 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 21:52:44,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 21:52:44,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:52:44,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 21:52:44,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-14 21:52:44,222 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 21:52:44,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:52:44,336 INFO L93 Difference]: Finished difference Result 152 states and 180 transitions. [2023-02-14 21:52:44,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-14 21:52:44,337 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-02-14 21:52:44,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:52:44,337 INFO L225 Difference]: With dead ends: 152 [2023-02-14 21:52:44,337 INFO L226 Difference]: Without dead ends: 113 [2023-02-14 21:52:44,338 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-02-14 21:52:44,338 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 91 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:52:44,338 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 140 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:52:44,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2023-02-14 21:52:44,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 85. [2023-02-14 21:52:44,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 75 states have internal predecessors, (88), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 21:52:44,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2023-02-14 21:52:44,367 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 42 [2023-02-14 21:52:44,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:52:44,367 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2023-02-14 21:52:44,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 21:52:44,368 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2023-02-14 21:52:44,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 21:52:44,368 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:52:44,369 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2023-02-14 21:52:44,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-14 21:52:44,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:52:44,573 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:52:44,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:52:44,574 INFO L85 PathProgramCache]: Analyzing trace with hash 460196979, now seen corresponding path program 3 times [2023-02-14 21:52:44,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:52:44,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036723789] [2023-02-14 21:52:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:52:44,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:52:44,580 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:52:44,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [688865197] [2023-02-14 21:52:44,580 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 21:52:44,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:52:44,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:52:44,581 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:52:44,594 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-14 21:52:44,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 21:52:44,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:52:44,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2023-02-14 21:52:44,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:52:44,793 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 81 treesize of output 76 [2023-02-14 21:52:44,797 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 74 treesize of output 160 [2023-02-14 21:52:44,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:52:44,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 111 treesize of output 3 [2023-02-14 21:52:44,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:52:44,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 34 [2023-02-14 21:52:45,361 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 21:52:45,362 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:52:45,512 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 76 treesize of output 72 [2023-02-14 21:52:45,541 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:52:45,541 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 161 [2023-02-14 21:52:45,580 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 21:52:45,608 INFO L321 Elim1Store]: treesize reduction 111, result has 39.0 percent of original size [2023-02-14 21:52:45,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 157 treesize of output 123 [2023-02-14 21:52:45,676 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:52:45,676 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 164 [2023-02-14 21:52:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-02-14 21:52:49,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:52:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036723789] [2023-02-14 21:52:49,318 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:52:49,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688865197] [2023-02-14 21:52:49,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [688865197] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:52:49,318 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 21:52:49,318 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2023-02-14 21:52:49,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161123064] [2023-02-14 21:52:49,318 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 21:52:49,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-14 21:52:49,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:52:49,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-14 21:52:49,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2023-02-14 21:52:49,319 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 21:52:51,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-02-14 21:53:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:53:04,811 INFO L93 Difference]: Finished difference Result 118 states and 143 transitions. [2023-02-14 21:53:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-14 21:53:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2023-02-14 21:53:04,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:53:04,812 INFO L225 Difference]: With dead ends: 118 [2023-02-14 21:53:04,812 INFO L226 Difference]: Without dead ends: 114 [2023-02-14 21:53:04,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=401, Invalid=1950, Unknown=1, NotChecked=0, Total=2352 [2023-02-14 21:53:04,813 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 139 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 49 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:53:04,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 163 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 643 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2023-02-14 21:53:04,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2023-02-14 21:53:04,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2023-02-14 21:53:04,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 74 states have (on average 1.1891891891891893) internal successors, (88), 75 states have internal predecessors, (88), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 21:53:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2023-02-14 21:53:04,833 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 42 [2023-02-14 21:53:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:53:04,834 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2023-02-14 21:53:04,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 27 states have internal predecessors, (60), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-14 21:53:04,834 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2023-02-14 21:53:04,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-02-14 21:53:04,837 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:53:04,837 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1] [2023-02-14 21:53:04,844 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-02-14 21:53:05,041 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-02-14 21:53:05,042 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:53:05,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:53:05,042 INFO L85 PathProgramCache]: Analyzing trace with hash -1406472713, now seen corresponding path program 2 times [2023-02-14 21:53:05,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:53:05,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332456408] [2023-02-14 21:53:05,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:53:05,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:53:05,063 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:53:05,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [467958966] [2023-02-14 21:53:05,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-14 21:53:05,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:53:05,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:53:05,065 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:53:05,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-14 21:53:05,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-14 21:53:05,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:53:05,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 21:53:05,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:53:05,153 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 21:53:05,153 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:53:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 21:53:05,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:53:05,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332456408] [2023-02-14 21:53:05,186 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:53:05,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467958966] [2023-02-14 21:53:05,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467958966] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:53:05,186 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 21:53:05,186 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-02-14 21:53:05,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217525600] [2023-02-14 21:53:05,186 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 21:53:05,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-14 21:53:05,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:53:05,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-14 21:53:05,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-02-14 21:53:05,187 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 21:53:05,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:53:05,345 INFO L93 Difference]: Finished difference Result 156 states and 190 transitions. [2023-02-14 21:53:05,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-14 21:53:05,345 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 42 [2023-02-14 21:53:05,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:53:05,346 INFO L225 Difference]: With dead ends: 156 [2023-02-14 21:53:05,346 INFO L226 Difference]: Without dead ends: 115 [2023-02-14 21:53:05,348 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-02-14 21:53:05,349 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:53:05,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 123 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:53:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-14 21:53:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 99. [2023-02-14 21:53:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 89 states have internal predecessors, (106), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2023-02-14 21:53:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 118 transitions. [2023-02-14 21:53:05,375 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 118 transitions. Word has length 42 [2023-02-14 21:53:05,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:53:05,376 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 118 transitions. [2023-02-14 21:53:05,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 11 states have internal predecessors, (41), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 21:53:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 118 transitions. [2023-02-14 21:53:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-14 21:53:05,376 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:53:05,377 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:53:05,393 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-02-14 21:53:05,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:53:05,583 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:53:05,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:53:05,583 INFO L85 PathProgramCache]: Analyzing trace with hash 822903975, now seen corresponding path program 4 times [2023-02-14 21:53:05,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:53:05,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649948389] [2023-02-14 21:53:05,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:53:05,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:53:05,590 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:53:05,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [118270105] [2023-02-14 21:53:05,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-14 21:53:05,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:53:05,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:53:05,591 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:53:05,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-14 21:53:05,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-14 21:53:05,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:53:05,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 21:53:05,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:53:05,686 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-02-14 21:53:05,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:53:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-02-14 21:53:05,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:53:05,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649948389] [2023-02-14 21:53:05,724 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:53:05,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118270105] [2023-02-14 21:53:05,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118270105] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:53:05,724 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 21:53:05,724 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-14 21:53:05,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56747185] [2023-02-14 21:53:05,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 21:53:05,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 21:53:05,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:53:05,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 21:53:05,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-14 21:53:05,726 INFO L87 Difference]: Start difference. First operand 99 states and 118 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 21:53:05,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:53:05,841 INFO L93 Difference]: Finished difference Result 118 states and 136 transitions. [2023-02-14 21:53:05,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-14 21:53:05,841 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 45 [2023-02-14 21:53:05,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:53:05,842 INFO L225 Difference]: With dead ends: 118 [2023-02-14 21:53:05,842 INFO L226 Difference]: Without dead ends: 79 [2023-02-14 21:53:05,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2023-02-14 21:53:05,842 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 57 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:53:05,842 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 123 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:53:05,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-14 21:53:05,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 71. [2023-02-14 21:53:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:53:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2023-02-14 21:53:05,853 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 45 [2023-02-14 21:53:05,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:53:05,854 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2023-02-14 21:53:05,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 21:53:05,854 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2023-02-14 21:53:05,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-14 21:53:05,854 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:53:05,854 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2023-02-14 21:53:05,865 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-14 21:53:06,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-14 21:53:06,059 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:53:06,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:53:06,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1727010197, now seen corresponding path program 3 times [2023-02-14 21:53:06,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:53:06,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524903645] [2023-02-14 21:53:06,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:53:06,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:53:06,066 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:53:06,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1514515982] [2023-02-14 21:53:06,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-14 21:53:06,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:53:06,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:53:06,067 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:53:06,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-14 21:53:06,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-14 21:53:06,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:53:06,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-14 21:53:06,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:53:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-02-14 21:53:06,223 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:53:06,408 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2023-02-14 21:53:06,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:53:06,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524903645] [2023-02-14 21:53:06,409 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:53:06,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514515982] [2023-02-14 21:53:06,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514515982] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:53:06,409 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 21:53:06,409 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2023-02-14 21:53:06,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650623309] [2023-02-14 21:53:06,409 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 21:53:06,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-14 21:53:06,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:53:06,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-14 21:53:06,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=288, Unknown=0, NotChecked=0, Total=380 [2023-02-14 21:53:06,410 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 20 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 21:53:06,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:53:06,684 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2023-02-14 21:53:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-14 21:53:06,684 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 49 [2023-02-14 21:53:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:53:06,685 INFO L225 Difference]: With dead ends: 127 [2023-02-14 21:53:06,685 INFO L226 Difference]: Without dead ends: 123 [2023-02-14 21:53:06,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2023-02-14 21:53:06,686 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 87 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:53:06,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 152 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:53:06,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-14 21:53:06,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 64. [2023-02-14 21:53:06,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.206896551724138) internal successors, (70), 58 states have internal predecessors, (70), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:53:06,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 76 transitions. [2023-02-14 21:53:06,696 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 76 transitions. Word has length 49 [2023-02-14 21:53:06,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:53:06,697 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 76 transitions. [2023-02-14 21:53:06,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 15 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2023-02-14 21:53:06,697 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 76 transitions. [2023-02-14 21:53:06,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-02-14 21:53:06,697 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:53:06,697 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:53:06,713 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-14 21:53:06,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-02-14 21:53:06,904 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:53:06,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:53:06,904 INFO L85 PathProgramCache]: Analyzing trace with hash 538416053, now seen corresponding path program 5 times [2023-02-14 21:53:06,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:53:06,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792729581] [2023-02-14 21:53:06,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:53:06,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:53:06,911 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:53:06,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [230088389] [2023-02-14 21:53:06,911 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-14 21:53:06,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:53:06,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:53:06,912 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:53:06,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-14 21:53:07,142 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-02-14 21:53:07,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:53:07,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-14 21:53:07,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:53:07,192 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-02-14 21:53:07,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-14 21:53:07,237 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 17 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-02-14 21:53:07,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-14 21:53:07,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792729581] [2023-02-14 21:53:07,238 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-02-14 21:53:07,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230088389] [2023-02-14 21:53:07,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230088389] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-14 21:53:07,238 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-02-14 21:53:07,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2023-02-14 21:53:07,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563797244] [2023-02-14 21:53:07,239 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-02-14 21:53:07,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-02-14 21:53:07,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-14 21:53:07,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-02-14 21:53:07,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2023-02-14 21:53:07,240 INFO L87 Difference]: Start difference. First operand 64 states and 76 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 21:53:07,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-14 21:53:07,380 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2023-02-14 21:53:07,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-14 21:53:07,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 54 [2023-02-14 21:53:07,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-14 21:53:07,381 INFO L225 Difference]: With dead ends: 71 [2023-02-14 21:53:07,381 INFO L226 Difference]: Without dead ends: 60 [2023-02-14 21:53:07,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 96 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2023-02-14 21:53:07,382 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-14 21:53:07,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 74 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-14 21:53:07,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-14 21:53:07,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2023-02-14 21:53:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 51 states have internal predecessors, (60), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-02-14 21:53:07,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2023-02-14 21:53:07,392 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 54 [2023-02-14 21:53:07,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-14 21:53:07,392 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2023-02-14 21:53:07,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-02-14 21:53:07,392 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2023-02-14 21:53:07,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-02-14 21:53:07,393 INFO L187 NwaCegarLoop]: Found error trace [2023-02-14 21:53:07,393 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-14 21:53:07,398 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-14 21:53:07,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-14 21:53:07,598 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-14 21:53:07,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-14 21:53:07,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1673343477, now seen corresponding path program 6 times [2023-02-14 21:53:07,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-14 21:53:07,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189659780] [2023-02-14 21:53:07,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-14 21:53:07,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-14 21:53:07,614 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-02-14 21:53:07,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [789348755] [2023-02-14 21:53:07,614 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-14 21:53:07,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-14 21:53:07,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-14 21:53:07,616 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-14 21:53:07,618 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-14 21:53:08,158 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-02-14 21:53:08,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-14 21:53:08,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 90 conjunts are in the unsatisfiable core [2023-02-14 21:53:08,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-14 21:53:08,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2023-02-14 21:53:08,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,274 INFO L321 Elim1Store]: treesize reduction 27, result has 32.5 percent of original size [2023-02-14 21:53:08,274 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 43 [2023-02-14 21:53:08,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,461 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:53:08,461 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 61 treesize of output 66 [2023-02-14 21:53:08,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:08,578 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-02-14 21:53:08,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 10 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 67 [2023-02-14 21:53:09,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,295 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,328 INFO L321 Elim1Store]: treesize reduction 49, result has 49.5 percent of original size [2023-02-14 21:53:09,329 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 12 case distinctions, treesize of input 69 treesize of output 108 [2023-02-14 21:53:09,759 INFO L321 Elim1Store]: treesize reduction 10, result has 64.3 percent of original size [2023-02-14 21:53:09,759 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 287 treesize of output 271 [2023-02-14 21:53:09,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,874 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,885 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:09,965 INFO L321 Elim1Store]: treesize reduction 318, result has 0.3 percent of original size [2023-02-14 21:53:09,965 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 20 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 8 case distinctions, treesize of input 270 treesize of output 300 [2023-02-14 21:53:10,070 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:10,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:10,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:10,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:10,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:10,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:10,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:10,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:10,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:10,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:10,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:10,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:10,099 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:10,275 INFO L321 Elim1Store]: treesize reduction 291, result has 23.2 percent of original size [2023-02-14 21:53:10,275 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 14 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 184 treesize of output 144 [2023-02-14 21:53:14,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:14,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:14,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:14,995 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 21:53:14,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:14,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:14,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:14,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:15,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:15,002 INFO L173 IndexEqualityManager]: detected equality via solver [2023-02-14 21:53:15,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:15,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:15,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-02-14 21:53:17,219 INFO L321 Elim1Store]: treesize reduction 694, result has 45.7 percent of original size [2023-02-14 21:53:17,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 13 select indices, 13 select index equivalence classes, 10 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 208 treesize of output 658