./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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-industry-pattern/array_shadowinit.i -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 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 22:09:40,957 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 22:09:40,959 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 22:09:40,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 22:09:40,979 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 22:09:40,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 22:09:40,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 22:09:40,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 22:09:40,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 22:09:40,983 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 22:09:40,984 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 22:09:40,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 22:09:40,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 22:09:40,986 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 22:09:40,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 22:09:40,987 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 22:09:40,988 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 22:09:40,989 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 22:09:40,990 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 22:09:40,992 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 22:09:40,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 22:09:40,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 22:09:40,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 22:09:40,995 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 22:09:40,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 22:09:40,998 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 22:09:40,998 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 22:09:40,999 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 22:09:40,999 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 22:09:41,000 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 22:09:41,000 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 22:09:41,001 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 22:09:41,002 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 22:09:41,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 22:09:41,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 22:09:41,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 22:09:41,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 22:09:41,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 22:09:41,004 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 22:09:41,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 22:09:41,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 22:09:41,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 22:09:41,019 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 22:09:41,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 22:09:41,019 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 22:09:41,020 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 22:09:41,020 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 22:09:41,020 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 22:09:41,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 22:09:41,021 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 22:09:41,021 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 22:09:41,021 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 22:09:41,021 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 22:09:41,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 22:09:41,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 22:09:41,022 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 22:09:41,022 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 22:09:41,022 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 22:09:41,022 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 22:09:41,022 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 22:09:41,022 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 22:09:41,023 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 22:09:41,023 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 22:09:41,023 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 22:09:41,023 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 22:09:41,023 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 22:09:41,023 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:09:41,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 22:09:41,024 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 22:09:41,024 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 22:09:41,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 22:09:41,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 22:09:41,024 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 22:09:41,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 22:09:41,025 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 22:09:41,025 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 22:09:41,025 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 22:09:41,025 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 03931b69e9073178e54f20b91a2b2a66154a89c69758aa4d312927278c5c0104 [2023-02-13 22:09:41,248 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 22:09:41,269 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 22:09:41,271 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 22:09:41,272 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 22:09:41,272 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 22:09:41,273 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2023-02-13 22:09:42,267 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 22:09:42,401 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 22:09:42,402 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_shadowinit.i [2023-02-13 22:09:42,405 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/716921e72/01ba291b3b034ac2b616e91e6b4c20aa/FLAG2ff635ab7 [2023-02-13 22:09:42,451 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/716921e72/01ba291b3b034ac2b616e91e6b4c20aa [2023-02-13 22:09:42,453 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 22:09:42,454 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 22:09:42,457 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 22:09:42,457 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 22:09:42,459 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 22:09:42,460 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:09:42" (1/1) ... [2023-02-13 22:09:42,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@316e60e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42, skipping insertion in model container [2023-02-13 22:09:42,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 10:09:42" (1/1) ... [2023-02-13 22:09:42,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 22:09:42,479 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 22:09:42,564 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-industry-pattern/array_shadowinit.i[809,822] [2023-02-13 22:09:42,572 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:09:42,578 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 22:09:42,585 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-industry-pattern/array_shadowinit.i[809,822] [2023-02-13 22:09:42,589 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 22:09:42,598 INFO L208 MainTranslator]: Completed translation [2023-02-13 22:09:42,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42 WrapperNode [2023-02-13 22:09:42,598 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 22:09:42,599 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 22:09:42,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 22:09:42,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 22:09:42,604 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42" (1/1) ... [2023-02-13 22:09:42,609 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42" (1/1) ... [2023-02-13 22:09:42,620 INFO L138 Inliner]: procedures = 16, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 44 [2023-02-13 22:09:42,620 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 22:09:42,621 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 22:09:42,621 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 22:09:42,621 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 22:09:42,627 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42" (1/1) ... [2023-02-13 22:09:42,627 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42" (1/1) ... [2023-02-13 22:09:42,628 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42" (1/1) ... [2023-02-13 22:09:42,628 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42" (1/1) ... [2023-02-13 22:09:42,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42" (1/1) ... [2023-02-13 22:09:42,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42" (1/1) ... [2023-02-13 22:09:42,633 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42" (1/1) ... [2023-02-13 22:09:42,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42" (1/1) ... [2023-02-13 22:09:42,635 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 22:09:42,636 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 22:09:42,636 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 22:09:42,636 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 22:09:42,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42" (1/1) ... [2023-02-13 22:09:42,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 22:09:42,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:42,658 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) [2023-02-13 22:09:42,665 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 [2023-02-13 22:09:42,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 22:09:42,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 22:09:42,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 22:09:42,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 22:09:42,686 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 22:09:42,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 22:09:42,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 22:09:42,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 22:09:42,735 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 22:09:42,737 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 22:09:42,873 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 22:09:42,877 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 22:09:42,877 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2023-02-13 22:09:42,878 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:09:42 BoogieIcfgContainer [2023-02-13 22:09:42,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 22:09:42,894 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 22:09:42,894 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 22:09:42,897 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 22:09:42,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 10:09:42" (1/3) ... [2023-02-13 22:09:42,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa71288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:09:42, skipping insertion in model container [2023-02-13 22:09:42,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 10:09:42" (2/3) ... [2023-02-13 22:09:42,898 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3aa71288 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 10:09:42, skipping insertion in model container [2023-02-13 22:09:42,898 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 10:09:42" (3/3) ... [2023-02-13 22:09:42,899 INFO L112 eAbstractionObserver]: Analyzing ICFG array_shadowinit.i [2023-02-13 22:09:42,911 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 22:09:42,925 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 22:09:42,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 22:09:42,989 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;@42260ab6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 22:09:42,990 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 22:09:42,994 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:42,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-13 22:09:42,999 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:43,000 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:43,001 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:43,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:43,005 INFO L85 PathProgramCache]: Analyzing trace with hash 126038137, now seen corresponding path program 1 times [2023-02-13 22:09:43,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:43,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370778285] [2023-02-13 22:09:43,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:43,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:43,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:43,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370778285] [2023-02-13 22:09:43,113 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370778285] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:09:43,113 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:09:43,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-02-13 22:09:43,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583325412] [2023-02-13 22:09:43,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:09:43,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-02-13 22:09:43,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:43,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-02-13 22:09:43,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 22:09:43,155 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:43,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:43,166 INFO L93 Difference]: Finished difference Result 26 states and 33 transitions. [2023-02-13 22:09:43,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-02-13 22:09:43,168 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-13 22:09:43,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:43,175 INFO L225 Difference]: With dead ends: 26 [2023-02-13 22:09:43,175 INFO L226 Difference]: Without dead ends: 10 [2023-02-13 22:09:43,177 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-02-13 22:09:43,180 INFO L413 NwaCegarLoop]: 17 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, 17 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 [2023-02-13 22:09:43,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:09:43,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2023-02-13 22:09:43,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2023-02-13 22:09:43,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:43,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 11 transitions. [2023-02-13 22:09:43,207 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 11 transitions. Word has length 8 [2023-02-13 22:09:43,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:43,208 INFO L495 AbstractCegarLoop]: Abstraction has 10 states and 11 transitions. [2023-02-13 22:09:43,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:43,208 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 11 transitions. [2023-02-13 22:09:43,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-02-13 22:09:43,208 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:43,209 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:43,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 22:09:43,209 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:43,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:43,210 INFO L85 PathProgramCache]: Analyzing trace with hash 122344053, now seen corresponding path program 1 times [2023-02-13 22:09:43,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:43,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848974407] [2023-02-13 22:09:43,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:43,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:43,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:43,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:43,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848974407] [2023-02-13 22:09:43,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848974407] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 22:09:43,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 22:09:43,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 22:09:43,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776934159] [2023-02-13 22:09:43,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 22:09:43,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 22:09:43,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:43,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 22:09:43,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 22:09:43,318 INFO L87 Difference]: Start difference. First operand 10 states and 11 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:43,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:43,335 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2023-02-13 22:09:43,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 22:09:43,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-02-13 22:09:43,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:43,336 INFO L225 Difference]: With dead ends: 17 [2023-02-13 22:09:43,336 INFO L226 Difference]: Without dead ends: 11 [2023-02-13 22:09:43,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 22:09:43,337 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 13 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 [2023-02-13 22:09:43,340 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 13 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:09:43,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2023-02-13 22:09:43,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2023-02-13 22:09:43,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:43,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 12 transitions. [2023-02-13 22:09:43,346 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 12 transitions. Word has length 8 [2023-02-13 22:09:43,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:43,346 INFO L495 AbstractCegarLoop]: Abstraction has 11 states and 12 transitions. [2023-02-13 22:09:43,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:43,347 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 12 transitions. [2023-02-13 22:09:43,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-02-13 22:09:43,347 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:43,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:43,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-02-13 22:09:43,348 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:43,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:43,350 INFO L85 PathProgramCache]: Analyzing trace with hash -450855509, now seen corresponding path program 1 times [2023-02-13 22:09:43,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:43,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406080404] [2023-02-13 22:09:43,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:43,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:43,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:43,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:43,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:43,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406080404] [2023-02-13 22:09:43,668 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406080404] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:43,668 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311268553] [2023-02-13 22:09:43,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:43,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:43,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:43,671 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) [2023-02-13 22:09:43,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 22:09:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:43,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-13 22:09:43,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:43,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-02-13 22:09:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:43,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:43,831 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 14 treesize of output 12 [2023-02-13 22:09:43,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 22 treesize of output 20 [2023-02-13 22:09:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:43,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311268553] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:43,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:43,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2023-02-13 22:09:43,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224260961] [2023-02-13 22:09:43,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:43,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-13 22:09:43,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:43,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-13 22:09:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-02-13 22:09:43,850 INFO L87 Difference]: Start difference. First operand 11 states and 12 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:43,900 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2023-02-13 22:09:43,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-13 22:09:43,901 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-02-13 22:09:43,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:43,901 INFO L225 Difference]: With dead ends: 17 [2023-02-13 22:09:43,901 INFO L226 Difference]: Without dead ends: 15 [2023-02-13 22:09:43,902 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-02-13 22:09:43,902 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:43,903 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 27 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:09:43,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-02-13 22:09:43,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 13. [2023-02-13 22:09:43,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:43,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2023-02-13 22:09:43,906 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 9 [2023-02-13 22:09:43,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:43,906 INFO L495 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2023-02-13 22:09:43,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:43,906 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2023-02-13 22:09:43,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-13 22:09:43,907 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:43,907 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:43,918 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-13 22:09:44,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:44,112 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:44,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:44,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1068940558, now seen corresponding path program 1 times [2023-02-13 22:09:44,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:44,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052301134] [2023-02-13 22:09:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:44,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:44,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:44,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:44,211 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052301134] [2023-02-13 22:09:44,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052301134] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:44,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100401382] [2023-02-13 22:09:44,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:44,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:44,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:44,231 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) [2023-02-13 22:09:44,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 22:09:44,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:44,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 22:09:44,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:44,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:44,317 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:44,346 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:44,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100401382] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:44,347 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:44,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-02-13 22:09:44,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312806497] [2023-02-13 22:09:44,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:44,348 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-13 22:09:44,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:44,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-13 22:09:44,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-02-13 22:09:44,349 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:44,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:44,390 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2023-02-13 22:09:44,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-02-13 22:09:44,390 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-02-13 22:09:44,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:44,391 INFO L225 Difference]: With dead ends: 30 [2023-02-13 22:09:44,391 INFO L226 Difference]: Without dead ends: 20 [2023-02-13 22:09:44,391 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-02-13 22:09:44,392 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 9 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:44,392 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 26 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:09:44,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-02-13 22:09:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2023-02-13 22:09:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2023-02-13 22:09:44,395 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 12 [2023-02-13 22:09:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:44,395 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2023-02-13 22:09:44,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2023-02-13 22:09:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-13 22:09:44,396 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:44,396 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:44,401 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-13 22:09:44,601 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,SelfDestructingSolverStorable3 [2023-02-13 22:09:44,602 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:44,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:44,602 INFO L85 PathProgramCache]: Analyzing trace with hash 407528232, now seen corresponding path program 2 times [2023-02-13 22:09:44,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:44,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093161265] [2023-02-13 22:09:44,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:44,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:44,864 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:44,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:44,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093161265] [2023-02-13 22:09:44,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093161265] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:44,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727759806] [2023-02-13 22:09:44,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:09:44,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:44,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:44,870 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) [2023-02-13 22:09:44,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 22:09:44,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:09:44,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:09:44,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-13 22:09:44,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:44,963 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:09:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:45,049 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:45,102 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 16 treesize of output 14 [2023-02-13 22:09:45,104 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:45,113 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 16 treesize of output 14 [2023-02-13 22:09:45,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:45,126 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:45,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727759806] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:45,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:45,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2023-02-13 22:09:45,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481733972] [2023-02-13 22:09:45,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:45,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-13 22:09:45,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:45,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-13 22:09:45,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2023-02-13 22:09:45,129 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:45,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:45,219 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2023-02-13 22:09:45,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-13 22:09:45,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-13 22:09:45,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:45,222 INFO L225 Difference]: With dead ends: 21 [2023-02-13 22:09:45,222 INFO L226 Difference]: Without dead ends: 19 [2023-02-13 22:09:45,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2023-02-13 22:09:45,223 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 17 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:45,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 40 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 85 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:09:45,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-13 22:09:45,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2023-02-13 22:09:45,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:45,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-02-13 22:09:45,229 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2023-02-13 22:09:45,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:45,230 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-02-13 22:09:45,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:45,230 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-02-13 22:09:45,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-02-13 22:09:45,231 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:45,231 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:45,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 22:09:45,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:45,436 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:45,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:45,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1194192811, now seen corresponding path program 3 times [2023-02-13 22:09:45,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:45,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926778640] [2023-02-13 22:09:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:45,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:45,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:45,506 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:45,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:45,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926778640] [2023-02-13 22:09:45,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926778640] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:45,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91885203] [2023-02-13 22:09:45,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:09:45,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:45,508 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:45,509 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) [2023-02-13 22:09:45,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 22:09:45,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-02-13 22:09:45,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:09:45,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2023-02-13 22:09:45,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:45,595 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:45,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91885203] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:45,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:45,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-02-13 22:09:45,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502433083] [2023-02-13 22:09:45,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:45,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-02-13 22:09:45,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:45,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-02-13 22:09:45,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2023-02-13 22:09:45,657 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:45,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:45,703 INFO L93 Difference]: Finished difference Result 37 states and 39 transitions. [2023-02-13 22:09:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-13 22:09:45,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-02-13 22:09:45,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:45,704 INFO L225 Difference]: With dead ends: 37 [2023-02-13 22:09:45,704 INFO L226 Difference]: Without dead ends: 24 [2023-02-13 22:09:45,704 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2023-02-13 22:09:45,705 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 15 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 62 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:45,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 31 Invalid, 62 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:09:45,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-02-13 22:09:45,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2023-02-13 22:09:45,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:45,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-02-13 22:09:45,708 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 16 [2023-02-13 22:09:45,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:45,709 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-02-13 22:09:45,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:45,709 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-02-13 22:09:45,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-13 22:09:45,709 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:45,709 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:45,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-02-13 22:09:45,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:45,914 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:45,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:45,914 INFO L85 PathProgramCache]: Analyzing trace with hash -298048117, now seen corresponding path program 4 times [2023-02-13 22:09:45,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:45,915 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607568634] [2023-02-13 22:09:45,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:45,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:46,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:46,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607568634] [2023-02-13 22:09:46,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607568634] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:46,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868038777] [2023-02-13 22:09:46,149 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:09:46,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:46,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:46,151 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) [2023-02-13 22:09:46,153 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 22:09:46,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:09:46,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:09:46,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 29 conjunts are in the unsatisfiable core [2023-02-13 22:09:46,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:46,209 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:09:46,311 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 44 treesize of output 20 [2023-02-13 22:09:46,338 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:46,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:46,414 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 16 treesize of output 14 [2023-02-13 22:09:46,416 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:46,430 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:46,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868038777] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:46,430 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:46,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 16 [2023-02-13 22:09:46,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171501870] [2023-02-13 22:09:46,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:46,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-02-13 22:09:46,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:46,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-02-13 22:09:46,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2023-02-13 22:09:46,432 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:46,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:46,602 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-02-13 22:09:46,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-13 22:09:46,602 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-13 22:09:46,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:46,602 INFO L225 Difference]: With dead ends: 25 [2023-02-13 22:09:46,603 INFO L226 Difference]: Without dead ends: 23 [2023-02-13 22:09:46,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2023-02-13 22:09:46,603 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:46,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 55 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:09:46,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-02-13 22:09:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 21. [2023-02-13 22:09:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:46,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2023-02-13 22:09:46,607 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 17 [2023-02-13 22:09:46,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:46,607 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2023-02-13 22:09:46,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:46,608 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2023-02-13 22:09:46,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-02-13 22:09:46,608 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:46,608 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:46,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-13 22:09:46,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:46,813 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:46,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:46,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1449259246, now seen corresponding path program 5 times [2023-02-13 22:09:46,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:46,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120328932] [2023-02-13 22:09:46,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:46,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:46,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:46,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:46,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120328932] [2023-02-13 22:09:46,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120328932] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:46,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681120153] [2023-02-13 22:09:46,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:09:46,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:46,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:46,891 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) [2023-02-13 22:09:46,893 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-13 22:09:46,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-02-13 22:09:46,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:09:46,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-13 22:09:46,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:47,002 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:47,002 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:47,059 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:47,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681120153] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:47,060 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:47,060 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2023-02-13 22:09:47,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686913447] [2023-02-13 22:09:47,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:47,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-13 22:09:47,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:47,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-13 22:09:47,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-02-13 22:09:47,061 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:47,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:47,130 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2023-02-13 22:09:47,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-02-13 22:09:47,131 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-02-13 22:09:47,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:47,131 INFO L225 Difference]: With dead ends: 44 [2023-02-13 22:09:47,131 INFO L226 Difference]: Without dead ends: 28 [2023-02-13 22:09:47,132 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 26 SyntacticMatches, 8 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2023-02-13 22:09:47,132 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:47,132 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 47 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:09:47,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-02-13 22:09:47,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2023-02-13 22:09:47,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2023-02-13 22:09:47,136 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 20 [2023-02-13 22:09:47,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:47,136 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2023-02-13 22:09:47,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:47,144 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2023-02-13 22:09:47,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-02-13 22:09:47,145 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:47,145 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:47,161 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-13 22:09:47,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:47,351 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:47,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:47,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1156487496, now seen corresponding path program 6 times [2023-02-13 22:09:47,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:47,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286960705] [2023-02-13 22:09:47,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:47,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:47,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:47,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286960705] [2023-02-13 22:09:47,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286960705] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:47,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806168967] [2023-02-13 22:09:47,609 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:09:47,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:47,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:47,611 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) [2023-02-13 22:09:47,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-13 22:09:47,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-02-13 22:09:47,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:09:47,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-13 22:09:47,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:47,724 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:09:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:47,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:47,917 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 16 treesize of output 14 [2023-02-13 22:09:47,924 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:47,929 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 16 treesize of output 14 [2023-02-13 22:09:47,931 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:47,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:47,945 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806168967] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:47,945 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:47,945 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 23 [2023-02-13 22:09:47,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884782080] [2023-02-13 22:09:47,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:47,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-13 22:09:47,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:47,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-13 22:09:47,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-02-13 22:09:47,947 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:48,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:48,133 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2023-02-13 22:09:48,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-13 22:09:48,133 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-02-13 22:09:48,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:48,134 INFO L225 Difference]: With dead ends: 29 [2023-02-13 22:09:48,134 INFO L226 Difference]: Without dead ends: 27 [2023-02-13 22:09:48,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2023-02-13 22:09:48,135 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 28 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:48,135 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 107 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:09:48,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-02-13 22:09:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2023-02-13 22:09:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-02-13 22:09:48,139 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 21 [2023-02-13 22:09:48,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:48,140 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-02-13 22:09:48,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-02-13 22:09:48,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-02-13 22:09:48,140 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:48,141 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:48,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-13 22:09:48,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:48,346 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:48,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1303861707, now seen corresponding path program 7 times [2023-02-13 22:09:48,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:48,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296252758] [2023-02-13 22:09:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:48,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:48,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:48,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:48,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296252758] [2023-02-13 22:09:48,454 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296252758] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:48,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909258864] [2023-02-13 22:09:48,454 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:09:48,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:48,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:48,455 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) [2023-02-13 22:09:48,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-13 22:09:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:48,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-13 22:09:48,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:48,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 26 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:48,669 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909258864] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:48,669 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:48,669 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2023-02-13 22:09:48,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696155941] [2023-02-13 22:09:48,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:48,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-02-13 22:09:48,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:48,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-02-13 22:09:48,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2023-02-13 22:09:48,670 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:48,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:48,749 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2023-02-13 22:09:48,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-02-13 22:09:48,750 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-02-13 22:09:48,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:48,750 INFO L225 Difference]: With dead ends: 51 [2023-02-13 22:09:48,750 INFO L226 Difference]: Without dead ends: 32 [2023-02-13 22:09:48,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 10 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2023-02-13 22:09:48,751 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:48,752 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 43 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:09:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-02-13 22:09:48,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2023-02-13 22:09:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:48,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-02-13 22:09:48,755 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 24 [2023-02-13 22:09:48,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:48,755 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-02-13 22:09:48,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 20 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:48,756 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-02-13 22:09:48,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-02-13 22:09:48,756 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:48,756 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:48,763 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-13 22:09:48,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-13 22:09:48,961 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:48,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:48,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1052957333, now seen corresponding path program 8 times [2023-02-13 22:09:48,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:48,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902150708] [2023-02-13 22:09:48,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:48,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:49,267 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:49,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902150708] [2023-02-13 22:09:49,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902150708] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:49,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28731736] [2023-02-13 22:09:49,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:09:49,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:49,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:49,269 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) [2023-02-13 22:09:49,271 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-13 22:09:49,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:09:49,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:09:49,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-13 22:09:49,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:49,388 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:09:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:49,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:49,627 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 16 treesize of output 14 [2023-02-13 22:09:49,628 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:49,633 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 16 treesize of output 14 [2023-02-13 22:09:49,635 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:49,651 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28731736] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:49,651 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:49,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2023-02-13 22:09:49,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879604044] [2023-02-13 22:09:49,651 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:49,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-02-13 22:09:49,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:49,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-02-13 22:09:49,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2023-02-13 22:09:49,653 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:49,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:49,900 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-02-13 22:09:49,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-02-13 22:09:49,900 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-02-13 22:09:49,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:49,901 INFO L225 Difference]: With dead ends: 33 [2023-02-13 22:09:49,901 INFO L226 Difference]: Without dead ends: 31 [2023-02-13 22:09:49,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2023-02-13 22:09:49,901 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 20 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:49,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 127 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:09:49,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-02-13 22:09:49,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-02-13 22:09:49,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:49,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2023-02-13 22:09:49,905 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 25 [2023-02-13 22:09:49,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:49,905 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2023-02-13 22:09:49,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:49,905 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2023-02-13 22:09:49,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-02-13 22:09:49,906 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:49,906 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:49,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-13 22:09:50,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:50,118 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:50,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:50,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1794016050, now seen corresponding path program 9 times [2023-02-13 22:09:50,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:50,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332137359] [2023-02-13 22:09:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:50,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:50,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:50,237 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:50,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:50,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332137359] [2023-02-13 22:09:50,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332137359] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:50,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751954455] [2023-02-13 22:09:50,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:09:50,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:50,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:50,239 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) [2023-02-13 22:09:50,266 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-13 22:09:50,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-02-13 22:09:50,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:09:50,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 14 conjunts are in the unsatisfiable core [2023-02-13 22:09:50,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:50,423 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:50,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:50,506 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 40 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:50,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751954455] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:50,506 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:50,506 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2023-02-13 22:09:50,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69077557] [2023-02-13 22:09:50,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:50,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-13 22:09:50,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:50,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-13 22:09:50,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2023-02-13 22:09:50,508 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:50,600 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2023-02-13 22:09:50,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-02-13 22:09:50,600 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-02-13 22:09:50,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:50,601 INFO L225 Difference]: With dead ends: 58 [2023-02-13 22:09:50,601 INFO L226 Difference]: Without dead ends: 36 [2023-02-13 22:09:50,601 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2023-02-13 22:09:50,602 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:50,602 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 53 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:09:50,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-02-13 22:09:50,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2023-02-13 22:09:50,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:50,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2023-02-13 22:09:50,605 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 28 [2023-02-13 22:09:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:50,606 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2023-02-13 22:09:50,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2023-02-13 22:09:50,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-02-13 22:09:50,606 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:50,606 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:50,613 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-13 22:09:50,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-02-13 22:09:50,811 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:50,811 INFO L85 PathProgramCache]: Analyzing trace with hash -528189592, now seen corresponding path program 10 times [2023-02-13 22:09:50,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:50,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816869696] [2023-02-13 22:09:50,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:50,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:51,103 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:51,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:51,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816869696] [2023-02-13 22:09:51,104 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816869696] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:51,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722327047] [2023-02-13 22:09:51,104 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:09:51,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:51,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:51,114 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) [2023-02-13 22:09:51,122 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-13 22:09:51,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:09:51,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:09:51,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-13 22:09:51,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:51,200 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:09:51,382 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 47 treesize of output 23 [2023-02-13 22:09:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:51,399 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:51,536 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 16 treesize of output 14 [2023-02-13 22:09:51,538 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:51,542 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 16 treesize of output 14 [2023-02-13 22:09:51,544 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:51,562 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:51,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722327047] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:51,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:51,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 25 [2023-02-13 22:09:51,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752301664] [2023-02-13 22:09:51,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:51,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-13 22:09:51,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:51,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-13 22:09:51,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2023-02-13 22:09:51,564 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:51,878 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2023-02-13 22:09:51,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-02-13 22:09:51,878 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-02-13 22:09:51,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:51,878 INFO L225 Difference]: With dead ends: 37 [2023-02-13 22:09:51,878 INFO L226 Difference]: Without dead ends: 35 [2023-02-13 22:09:51,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 44 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=149, Invalid=1111, Unknown=0, NotChecked=0, Total=1260 [2023-02-13 22:09:51,879 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:51,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 124 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:09:51,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-02-13 22:09:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2023-02-13 22:09:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2023-02-13 22:09:51,883 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 29 [2023-02-13 22:09:51,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:51,884 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2023-02-13 22:09:51,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:51,884 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2023-02-13 22:09:51,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-02-13 22:09:51,884 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:51,884 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:51,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-13 22:09:52,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-02-13 22:09:52,090 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:52,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:52,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1468830741, now seen corresponding path program 11 times [2023-02-13 22:09:52,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:52,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659947053] [2023-02-13 22:09:52,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:52,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:52,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 41 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:52,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:52,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659947053] [2023-02-13 22:09:52,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659947053] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:52,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317664845] [2023-02-13 22:09:52,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:09:52,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:52,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:52,240 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) [2023-02-13 22:09:52,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-13 22:09:52,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-02-13 22:09:52,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:09:52,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-13 22:09:52,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:52,456 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:52,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 57 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:52,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317664845] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:52,539 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:52,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2023-02-13 22:09:52,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266063828] [2023-02-13 22:09:52,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:52,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2023-02-13 22:09:52,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:52,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2023-02-13 22:09:52,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2023-02-13 22:09:52,547 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:52,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:52,662 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2023-02-13 22:09:52,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-02-13 22:09:52,663 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2023-02-13 22:09:52,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:52,663 INFO L225 Difference]: With dead ends: 65 [2023-02-13 22:09:52,663 INFO L226 Difference]: Without dead ends: 40 [2023-02-13 22:09:52,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 41 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2023-02-13 22:09:52,664 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:52,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 69 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 22:09:52,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-02-13 22:09:52,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 34. [2023-02-13 22:09:52,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:52,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2023-02-13 22:09:52,673 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 32 [2023-02-13 22:09:52,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:52,673 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2023-02-13 22:09:52,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 26 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:52,673 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2023-02-13 22:09:52,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-02-13 22:09:52,676 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:52,676 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:52,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-13 22:09:52,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-02-13 22:09:52,881 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:52,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:52,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1812036939, now seen corresponding path program 12 times [2023-02-13 22:09:52,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:52,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914926277] [2023-02-13 22:09:52,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:52,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:52,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:53,271 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:53,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:53,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914926277] [2023-02-13 22:09:53,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914926277] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:53,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64865162] [2023-02-13 22:09:53,272 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:09:53,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:53,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:53,290 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) [2023-02-13 22:09:53,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-13 22:09:53,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2023-02-13 22:09:53,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:09:53,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 59 conjunts are in the unsatisfiable core [2023-02-13 22:09:53,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:53,609 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:09:53,855 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 47 treesize of output 23 [2023-02-13 22:09:53,876 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:53,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:54,001 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 16 treesize of output 14 [2023-02-13 22:09:54,003 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:54,009 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 16 treesize of output 14 [2023-02-13 22:09:54,011 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:54,032 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:54,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64865162] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:54,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:54,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 34 [2023-02-13 22:09:54,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847410550] [2023-02-13 22:09:54,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:54,034 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-13 22:09:54,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:54,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-13 22:09:54,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2023-02-13 22:09:54,035 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:54,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:54,406 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2023-02-13 22:09:54,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-13 22:09:54,406 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-02-13 22:09:54,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:54,406 INFO L225 Difference]: With dead ends: 41 [2023-02-13 22:09:54,406 INFO L226 Difference]: Without dead ends: 39 [2023-02-13 22:09:54,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 45 SyntacticMatches, 5 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=174, Invalid=1806, Unknown=0, NotChecked=0, Total=1980 [2023-02-13 22:09:54,407 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 616 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 616 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:54,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 173 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 616 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:09:54,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-02-13 22:09:54,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2023-02-13 22:09:54,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:54,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2023-02-13 22:09:54,412 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 33 [2023-02-13 22:09:54,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:54,412 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2023-02-13 22:09:54,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:54,412 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2023-02-13 22:09:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-02-13 22:09:54,413 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:54,413 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:54,422 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-02-13 22:09:54,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-02-13 22:09:54,618 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:54,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1046700206, now seen corresponding path program 13 times [2023-02-13 22:09:54,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:54,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779465296] [2023-02-13 22:09:54,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:54,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 58 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:54,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:54,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779465296] [2023-02-13 22:09:54,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779465296] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:54,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536688304] [2023-02-13 22:09:54,796 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:09:54,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:54,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:54,810 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:09:54,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-02-13 22:09:54,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:54,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2023-02-13 22:09:54,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:55,032 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:55,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:55,151 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 77 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:55,152 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536688304] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:55,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:55,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2023-02-13 22:09:55,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841944400] [2023-02-13 22:09:55,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:55,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-02-13 22:09:55,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:55,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-02-13 22:09:55,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2023-02-13 22:09:55,153 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:55,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:55,267 INFO L93 Difference]: Finished difference Result 72 states and 74 transitions. [2023-02-13 22:09:55,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-02-13 22:09:55,268 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2023-02-13 22:09:55,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:55,268 INFO L225 Difference]: With dead ends: 72 [2023-02-13 22:09:55,268 INFO L226 Difference]: Without dead ends: 44 [2023-02-13 22:09:55,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 46 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2023-02-13 22:09:55,269 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 43 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:55,269 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 82 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:09:55,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-02-13 22:09:55,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2023-02-13 22:09:55,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:55,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-02-13 22:09:55,273 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 36 [2023-02-13 22:09:55,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:55,273 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-02-13 22:09:55,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:55,274 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-02-13 22:09:55,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-02-13 22:09:55,274 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:55,274 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:55,293 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-02-13 22:09:55,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:55,480 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:55,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:55,481 INFO L85 PathProgramCache]: Analyzing trace with hash 1382940040, now seen corresponding path program 14 times [2023-02-13 22:09:55,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:55,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711695034] [2023-02-13 22:09:55,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:55,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:55,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:55,908 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:55,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:55,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711695034] [2023-02-13 22:09:55,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711695034] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:55,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720714386] [2023-02-13 22:09:55,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:09:55,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:55,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:55,917 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:09:55,918 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-02-13 22:09:55,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:09:55,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:09:55,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-13 22:09:55,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:56,155 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:09:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:56,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:56,573 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 16 treesize of output 14 [2023-02-13 22:09:56,574 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:56,578 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 16 treesize of output 14 [2023-02-13 22:09:56,579 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:56,611 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:56,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720714386] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:56,611 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:56,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 39 [2023-02-13 22:09:56,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623123725] [2023-02-13 22:09:56,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:56,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-13 22:09:56,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:56,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-13 22:09:56,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1370, Unknown=0, NotChecked=0, Total=1482 [2023-02-13 22:09:56,613 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:57,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:57,039 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2023-02-13 22:09:57,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-13 22:09:57,040 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2023-02-13 22:09:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:57,040 INFO L225 Difference]: With dead ends: 45 [2023-02-13 22:09:57,040 INFO L226 Difference]: Without dead ends: 43 [2023-02-13 22:09:57,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=2250, Unknown=0, NotChecked=0, Total=2450 [2023-02-13 22:09:57,041 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 21 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 849 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:57,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 290 Invalid, 858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 849 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 22:09:57,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-02-13 22:09:57,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2023-02-13 22:09:57,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:57,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2023-02-13 22:09:57,046 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 37 [2023-02-13 22:09:57,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:57,046 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2023-02-13 22:09:57,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.9230769230769231) internal successors, (75), 39 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:57,046 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2023-02-13 22:09:57,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-02-13 22:09:57,047 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:57,047 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:57,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-02-13 22:09:57,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-02-13 22:09:57,256 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:57,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:57,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1845221877, now seen corresponding path program 15 times [2023-02-13 22:09:57,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:57,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462477348] [2023-02-13 22:09:57,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:57,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:57,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:57,479 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 78 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:57,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:57,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462477348] [2023-02-13 22:09:57,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462477348] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:57,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945604170] [2023-02-13 22:09:57,479 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:09:57,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:57,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:57,493 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:09:57,496 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-02-13 22:09:57,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-02-13 22:09:57,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:09:57,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 20 conjunts are in the unsatisfiable core [2023-02-13 22:09:57,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:57,831 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:57,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:57,941 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:57,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945604170] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:57,942 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:57,942 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2023-02-13 22:09:57,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260111725] [2023-02-13 22:09:57,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:57,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-02-13 22:09:57,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:57,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-02-13 22:09:57,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2023-02-13 22:09:57,944 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:58,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:58,076 INFO L93 Difference]: Finished difference Result 79 states and 81 transitions. [2023-02-13 22:09:58,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-13 22:09:58,077 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-02-13 22:09:58,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:58,077 INFO L225 Difference]: With dead ends: 79 [2023-02-13 22:09:58,077 INFO L226 Difference]: Without dead ends: 48 [2023-02-13 22:09:58,078 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 51 SyntacticMatches, 18 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2023-02-13 22:09:58,079 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 63 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:58,079 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 79 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:09:58,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-02-13 22:09:58,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2023-02-13 22:09:58,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:58,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2023-02-13 22:09:58,088 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 40 [2023-02-13 22:09:58,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:58,088 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2023-02-13 22:09:58,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.25) internal successors, (72), 32 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:58,089 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2023-02-13 22:09:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-02-13 22:09:58,089 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:58,089 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:58,097 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-02-13 22:09:58,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-02-13 22:09:58,295 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:09:58,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:09:58,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1575431467, now seen corresponding path program 16 times [2023-02-13 22:09:58,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:09:58,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582072875] [2023-02-13 22:09:58,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:09:58,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:09:58,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:09:58,710 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:58,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:09:58,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582072875] [2023-02-13 22:09:58,711 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582072875] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:09:58,711 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784005333] [2023-02-13 22:09:58,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:09:58,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:09:58,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:09:58,712 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:09:58,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-02-13 22:09:58,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:09:58,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:09:58,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 53 conjunts are in the unsatisfiable core [2023-02-13 22:09:58,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:09:58,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:09:59,150 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 47 treesize of output 23 [2023-02-13 22:09:59,171 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:59,171 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:09:59,316 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 16 treesize of output 14 [2023-02-13 22:09:59,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:59,322 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 16 treesize of output 14 [2023-02-13 22:09:59,324 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:09:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:09:59,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784005333] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:09:59,349 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:09:59,349 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 34 [2023-02-13 22:09:59,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012112708] [2023-02-13 22:09:59,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:09:59,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-02-13 22:09:59,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:09:59,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-02-13 22:09:59,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2023-02-13 22:09:59,350 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:59,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:09:59,834 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2023-02-13 22:09:59,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-13 22:09:59,835 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-02-13 22:09:59,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:09:59,835 INFO L225 Difference]: With dead ends: 49 [2023-02-13 22:09:59,835 INFO L226 Difference]: Without dead ends: 47 [2023-02-13 22:09:59,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 65 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=2062, Unknown=0, NotChecked=0, Total=2256 [2023-02-13 22:09:59,836 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 24 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 809 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 22:09:59,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 235 Invalid, 820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 809 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 22:09:59,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-02-13 22:09:59,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2023-02-13 22:09:59,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2023-02-13 22:09:59,843 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 41 [2023-02-13 22:09:59,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:09:59,843 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2023-02-13 22:09:59,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.088235294117647) internal successors, (71), 34 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:09:59,843 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2023-02-13 22:09:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-02-13 22:09:59,843 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:09:59,843 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:09:59,853 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:00,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:00,054 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:00,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:00,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1718983822, now seen corresponding path program 17 times [2023-02-13 22:10:00,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:00,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899989171] [2023-02-13 22:10:00,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:00,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:00,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:00,293 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 101 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:00,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:00,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899989171] [2023-02-13 22:10:00,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899989171] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:00,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687477596] [2023-02-13 22:10:00,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:10:00,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:00,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:00,295 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:00,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-02-13 22:10:00,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-02-13 22:10:00,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:00,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 22 conjunts are in the unsatisfiable core [2023-02-13 22:10:00,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:00,648 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:00,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:00,813 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 126 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:00,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687477596] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:00,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:00,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 35 [2023-02-13 22:10:00,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074527096] [2023-02-13 22:10:00,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:00,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-13 22:10:00,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:00,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-13 22:10:00,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2023-02-13 22:10:00,814 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:00,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:00,954 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2023-02-13 22:10:00,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-02-13 22:10:00,954 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2023-02-13 22:10:00,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:00,954 INFO L225 Difference]: With dead ends: 86 [2023-02-13 22:10:00,955 INFO L226 Difference]: Without dead ends: 52 [2023-02-13 22:10:00,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 56 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 910 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=486, Invalid=1494, Unknown=0, NotChecked=0, Total=1980 [2023-02-13 22:10:00,956 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 157 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:00,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 83 Invalid, 200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 157 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:10:00,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-02-13 22:10:00,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2023-02-13 22:10:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:00,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2023-02-13 22:10:00,961 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 44 [2023-02-13 22:10:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:00,962 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2023-02-13 22:10:00,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.257142857142857) internal successors, (79), 35 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:00,962 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2023-02-13 22:10:00,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-13 22:10:00,962 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:00,962 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:00,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:01,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:01,163 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:01,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:01,164 INFO L85 PathProgramCache]: Analyzing trace with hash 814558120, now seen corresponding path program 18 times [2023-02-13 22:10:01,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:01,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995644276] [2023-02-13 22:10:01,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:01,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:01,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:01,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:01,636 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995644276] [2023-02-13 22:10:01,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995644276] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:01,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354838053] [2023-02-13 22:10:01,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:10:01,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:01,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:01,638 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:01,639 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-02-13 22:10:01,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2023-02-13 22:10:01,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:01,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 57 conjunts are in the unsatisfiable core [2023-02-13 22:10:01,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:01,840 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:10:02,240 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 47 treesize of output 23 [2023-02-13 22:10:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:02,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:02,483 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 16 treesize of output 14 [2023-02-13 22:10:02,484 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:02,490 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 16 treesize of output 14 [2023-02-13 22:10:02,491 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:02,513 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:02,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354838053] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:02,513 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:02,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 37 [2023-02-13 22:10:02,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817500658] [2023-02-13 22:10:02,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:02,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-02-13 22:10:02,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:02,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-02-13 22:10:02,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1234, Unknown=0, NotChecked=0, Total=1332 [2023-02-13 22:10:02,515 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:02,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:02,992 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2023-02-13 22:10:02,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-13 22:10:02,992 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2023-02-13 22:10:02,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:02,993 INFO L225 Difference]: With dead ends: 53 [2023-02-13 22:10:02,993 INFO L226 Difference]: Without dead ends: 51 [2023-02-13 22:10:02,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=2537, Unknown=0, NotChecked=0, Total=2756 [2023-02-13 22:10:02,994 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:02,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 289 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 22:10:02,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-02-13 22:10:03,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2023-02-13 22:10:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:03,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2023-02-13 22:10:03,004 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 45 [2023-02-13 22:10:03,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:03,005 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2023-02-13 22:10:03,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.108108108108108) internal successors, (78), 37 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:03,005 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2023-02-13 22:10:03,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-02-13 22:10:03,006 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:03,006 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:03,013 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-02-13 22:10:03,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:03,215 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:03,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:03,215 INFO L85 PathProgramCache]: Analyzing trace with hash -59476011, now seen corresponding path program 19 times [2023-02-13 22:10:03,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:03,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94303743] [2023-02-13 22:10:03,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:03,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:03,505 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 127 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:03,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:03,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94303743] [2023-02-13 22:10:03,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94303743] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:03,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067416167] [2023-02-13 22:10:03,505 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:10:03,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:03,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:03,507 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:03,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-02-13 22:10:03,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:03,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-13 22:10:03,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:03,809 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:03,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 155 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:03,994 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067416167] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:03,994 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:03,994 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 38 [2023-02-13 22:10:03,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802076112] [2023-02-13 22:10:03,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:03,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-13 22:10:03,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:03,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-13 22:10:03,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=341, Invalid=1065, Unknown=0, NotChecked=0, Total=1406 [2023-02-13 22:10:03,998 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:04,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:04,170 INFO L93 Difference]: Finished difference Result 93 states and 95 transitions. [2023-02-13 22:10:04,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-13 22:10:04,170 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2023-02-13 22:10:04,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:04,171 INFO L225 Difference]: With dead ends: 93 [2023-02-13 22:10:04,171 INFO L226 Difference]: Without dead ends: 56 [2023-02-13 22:10:04,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 22 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=1780, Unknown=0, NotChecked=0, Total=2352 [2023-02-13 22:10:04,175 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 87 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 194 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 194 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:04,175 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 101 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 194 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:10:04,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-02-13 22:10:04,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2023-02-13 22:10:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:04,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2023-02-13 22:10:04,189 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 48 [2023-02-13 22:10:04,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:04,189 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2023-02-13 22:10:04,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:04,189 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2023-02-13 22:10:04,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-02-13 22:10:04,191 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:04,191 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:04,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:04,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-02-13 22:10:04,397 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:04,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1204565259, now seen corresponding path program 20 times [2023-02-13 22:10:04,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:04,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062813509] [2023-02-13 22:10:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:04,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:04,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:04,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:04,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062813509] [2023-02-13 22:10:04,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062813509] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:04,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449639842] [2023-02-13 22:10:04,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:10:04,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:04,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:04,935 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:04,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-02-13 22:10:05,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:10:05,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:05,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 80 conjunts are in the unsatisfiable core [2023-02-13 22:10:05,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:05,291 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:10:05,770 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:05,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:05,898 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 16 treesize of output 14 [2023-02-13 22:10:05,900 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:05,902 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 16 treesize of output 14 [2023-02-13 22:10:05,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:05,927 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 0 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:05,927 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449639842] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:05,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:05,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2023-02-13 22:10:05,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018851263] [2023-02-13 22:10:05,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:05,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-02-13 22:10:05,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:05,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-02-13 22:10:05,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2023-02-13 22:10:05,929 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:06,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:06,503 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2023-02-13 22:10:06,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-02-13 22:10:06,503 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-02-13 22:10:06,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:06,504 INFO L225 Difference]: With dead ends: 57 [2023-02-13 22:10:06,504 INFO L226 Difference]: Without dead ends: 55 [2023-02-13 22:10:06,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=260, Invalid=3900, Unknown=0, NotChecked=0, Total=4160 [2023-02-13 22:10:06,505 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 1470 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 1470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:06,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 477 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 1470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-13 22:10:06,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-02-13 22:10:06,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2023-02-13 22:10:06,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:06,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2023-02-13 22:10:06,513 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 49 [2023-02-13 22:10:06,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:06,521 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2023-02-13 22:10:06,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.9411764705882353) internal successors, (99), 51 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:06,521 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2023-02-13 22:10:06,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-02-13 22:10:06,522 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:06,522 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:06,529 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:06,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-02-13 22:10:06,723 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:06,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:06,723 INFO L85 PathProgramCache]: Analyzing trace with hash 756666258, now seen corresponding path program 21 times [2023-02-13 22:10:06,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:06,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853776515] [2023-02-13 22:10:06,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:06,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:06,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:07,021 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 156 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:07,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853776515] [2023-02-13 22:10:07,021 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853776515] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:07,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238680026] [2023-02-13 22:10:07,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:10:07,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:07,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:07,023 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:07,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-02-13 22:10:07,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-02-13 22:10:07,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:07,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-13 22:10:07,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:07,577 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:07,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:07,798 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 187 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:07,798 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238680026] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:07,798 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:07,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 41 [2023-02-13 22:10:07,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638546430] [2023-02-13 22:10:07,799 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:07,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-02-13 22:10:07,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:07,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-02-13 22:10:07,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=1245, Unknown=0, NotChecked=0, Total=1640 [2023-02-13 22:10:07,800 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:07,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:07,981 INFO L93 Difference]: Finished difference Result 100 states and 102 transitions. [2023-02-13 22:10:07,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-02-13 22:10:07,982 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-02-13 22:10:07,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:07,982 INFO L225 Difference]: With dead ends: 100 [2023-02-13 22:10:07,982 INFO L226 Difference]: Without dead ends: 60 [2023-02-13 22:10:07,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 66 SyntacticMatches, 24 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=665, Invalid=2091, Unknown=0, NotChecked=0, Total=2756 [2023-02-13 22:10:07,983 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 131 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:07,984 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 98 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:10:07,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-02-13 22:10:07,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2023-02-13 22:10:07,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:07,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2023-02-13 22:10:07,990 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 52 [2023-02-13 22:10:07,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:07,990 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2023-02-13 22:10:07,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.268292682926829) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:07,991 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2023-02-13 22:10:07,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-02-13 22:10:07,991 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:07,991 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:07,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-02-13 22:10:08,197 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:08,197 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:08,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:08,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1598292424, now seen corresponding path program 22 times [2023-02-13 22:10:08,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:08,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452943351] [2023-02-13 22:10:08,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:08,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:08,767 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:08,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:08,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452943351] [2023-02-13 22:10:08,767 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452943351] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:08,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178920325] [2023-02-13 22:10:08,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:10:08,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:08,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:08,769 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:08,770 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-02-13 22:10:08,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:10:08,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:08,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 65 conjunts are in the unsatisfiable core [2023-02-13 22:10:08,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:08,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:10:09,457 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 47 treesize of output 23 [2023-02-13 22:10:09,476 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:09,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:09,638 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 16 treesize of output 14 [2023-02-13 22:10:09,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:09,643 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 16 treesize of output 14 [2023-02-13 22:10:09,644 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:09,674 INFO L134 CoverageAnalysis]: Checked inductivity of 265 backedges. 0 proven. 265 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:09,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178920325] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:09,675 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:09,675 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 43 [2023-02-13 22:10:09,675 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853922111] [2023-02-13 22:10:09,675 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:09,677 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-02-13 22:10:09,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:09,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-02-13 22:10:09,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1692, Unknown=0, NotChecked=0, Total=1806 [2023-02-13 22:10:09,678 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:10,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:10,327 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2023-02-13 22:10:10,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-02-13 22:10:10,327 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-02-13 22:10:10,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:10,328 INFO L225 Difference]: With dead ends: 61 [2023-02-13 22:10:10,328 INFO L226 Difference]: Without dead ends: 59 [2023-02-13 22:10:10,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 86 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=249, Invalid=3411, Unknown=0, NotChecked=0, Total=3660 [2023-02-13 22:10:10,332 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 1326 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 1341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1326 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:10,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 382 Invalid, 1341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1326 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-13 22:10:10,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-02-13 22:10:10,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2023-02-13 22:10:10,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:10,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2023-02-13 22:10:10,357 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 53 [2023-02-13 22:10:10,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:10,358 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2023-02-13 22:10:10,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.13953488372093) internal successors, (92), 43 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:10,358 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2023-02-13 22:10:10,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-02-13 22:10:10,358 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:10,358 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:10,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-02-13 22:10:10,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:10,564 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:10,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:10,564 INFO L85 PathProgramCache]: Analyzing trace with hash 726953397, now seen corresponding path program 23 times [2023-02-13 22:10:10,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:10,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661870646] [2023-02-13 22:10:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:10,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:10,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 188 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:10,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:10,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661870646] [2023-02-13 22:10:10,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661870646] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:10,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562733938] [2023-02-13 22:10:10,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:10:10,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:10,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:10,864 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:10,881 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-02-13 22:10:11,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-13 22:10:11,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:11,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 28 conjunts are in the unsatisfiable core [2023-02-13 22:10:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:11,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:11,575 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 222 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:11,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562733938] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:11,576 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:11,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 44 [2023-02-13 22:10:11,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694473946] [2023-02-13 22:10:11,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:11,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-02-13 22:10:11,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:11,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-02-13 22:10:11,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=1439, Unknown=0, NotChecked=0, Total=1892 [2023-02-13 22:10:11,578 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:11,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:11,779 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2023-02-13 22:10:11,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-02-13 22:10:11,780 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-02-13 22:10:11,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:11,780 INFO L225 Difference]: With dead ends: 107 [2023-02-13 22:10:11,780 INFO L226 Difference]: Without dead ends: 64 [2023-02-13 22:10:11,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 71 SyntacticMatches, 26 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=765, Invalid=2427, Unknown=0, NotChecked=0, Total=3192 [2023-02-13 22:10:11,782 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 127 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:11,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 125 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:10:11,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2023-02-13 22:10:11,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2023-02-13 22:10:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2023-02-13 22:10:11,791 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 56 [2023-02-13 22:10:11,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:11,791 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2023-02-13 22:10:11,791 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.272727272727273) internal successors, (100), 44 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:11,791 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2023-02-13 22:10:11,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-02-13 22:10:11,791 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:11,792 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:11,811 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:11,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-02-13 22:10:11,998 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:11,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:11,998 INFO L85 PathProgramCache]: Analyzing trace with hash -66153237, now seen corresponding path program 24 times [2023-02-13 22:10:11,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:11,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48813394] [2023-02-13 22:10:11,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:11,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:12,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:12,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48813394] [2023-02-13 22:10:12,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48813394] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:12,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395763030] [2023-02-13 22:10:12,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:10:12,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:12,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:12,766 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:12,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-02-13 22:10:13,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-02-13 22:10:13,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:13,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 71 conjunts are in the unsatisfiable core [2023-02-13 22:10:13,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:13,276 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:10:13,656 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 47 treesize of output 23 [2023-02-13 22:10:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:13,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:14,215 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 16 treesize of output 14 [2023-02-13 22:10:14,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 0 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:14,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395763030] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:14,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:14,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 31, 31] total 60 [2023-02-13 22:10:14,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573364395] [2023-02-13 22:10:14,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:14,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-02-13 22:10:14,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:14,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-02-13 22:10:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3362, Unknown=0, NotChecked=0, Total=3540 [2023-02-13 22:10:14,571 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 60 states, 60 states have (on average 1.9) internal successors, (114), 60 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:15,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:15,625 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2023-02-13 22:10:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-13 22:10:15,625 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.9) internal successors, (114), 60 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2023-02-13 22:10:15,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:15,626 INFO L225 Difference]: With dead ends: 65 [2023-02-13 22:10:15,626 INFO L226 Difference]: Without dead ends: 63 [2023-02-13 22:10:15,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 80 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=339, Invalid=5823, Unknown=0, NotChecked=0, Total=6162 [2023-02-13 22:10:15,628 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 28 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 1813 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 1828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:15,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 566 Invalid, 1828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1813 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-13 22:10:15,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-02-13 22:10:15,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2023-02-13 22:10:15,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2023-02-13 22:10:15,636 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 57 [2023-02-13 22:10:15,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:15,636 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2023-02-13 22:10:15,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.9) internal successors, (114), 60 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:15,636 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2023-02-13 22:10:15,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-02-13 22:10:15,637 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:15,637 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:15,653 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:15,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-02-13 22:10:15,843 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:15,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:15,843 INFO L85 PathProgramCache]: Analyzing trace with hash 623698866, now seen corresponding path program 25 times [2023-02-13 22:10:15,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:15,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007859776] [2023-02-13 22:10:15,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:15,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:16,223 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 223 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:16,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:16,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007859776] [2023-02-13 22:10:16,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007859776] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:16,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777011963] [2023-02-13 22:10:16,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:10:16,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:16,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:16,225 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:16,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-02-13 22:10:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:16,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 30 conjunts are in the unsatisfiable core [2023-02-13 22:10:16,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:16,673 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:16,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 260 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:16,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777011963] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:16,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:16,950 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2023-02-13 22:10:16,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726367692] [2023-02-13 22:10:16,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:16,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-02-13 22:10:16,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:16,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-02-13 22:10:16,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2023-02-13 22:10:16,961 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:17,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:17,161 INFO L93 Difference]: Finished difference Result 114 states and 116 transitions. [2023-02-13 22:10:17,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-13 22:10:17,161 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2023-02-13 22:10:17,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:17,162 INFO L225 Difference]: With dead ends: 114 [2023-02-13 22:10:17,162 INFO L226 Difference]: Without dead ends: 68 [2023-02-13 22:10:17,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 76 SyntacticMatches, 28 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1700 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2023-02-13 22:10:17,163 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 105 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:17,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 119 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:10:17,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2023-02-13 22:10:17,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 62. [2023-02-13 22:10:17,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:17,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2023-02-13 22:10:17,171 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 60 [2023-02-13 22:10:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:17,172 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2023-02-13 22:10:17,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.276595744680851) internal successors, (107), 47 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:17,172 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2023-02-13 22:10:17,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-02-13 22:10:17,172 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:17,172 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:17,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:17,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-02-13 22:10:17,378 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:17,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:17,378 INFO L85 PathProgramCache]: Analyzing trace with hash 829718504, now seen corresponding path program 26 times [2023-02-13 22:10:17,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:17,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184966395] [2023-02-13 22:10:17,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:17,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:17,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:18,242 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:18,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:18,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184966395] [2023-02-13 22:10:18,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184966395] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:18,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783092590] [2023-02-13 22:10:18,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:10:18,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:18,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:18,257 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:18,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-02-13 22:10:18,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:10:18,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:18,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 98 conjunts are in the unsatisfiable core [2023-02-13 22:10:18,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:18,771 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:10:19,477 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:19,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:19,646 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 16 treesize of output 14 [2023-02-13 22:10:19,647 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:19,651 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 16 treesize of output 14 [2023-02-13 22:10:19,653 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 365 backedges. 0 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:19,694 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783092590] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:19,694 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:19,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 63 [2023-02-13 22:10:19,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640905257] [2023-02-13 22:10:19,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:19,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2023-02-13 22:10:19,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:19,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2023-02-13 22:10:19,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=3722, Unknown=0, NotChecked=0, Total=3906 [2023-02-13 22:10:19,696 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 63 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 63 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:20,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:20,646 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2023-02-13 22:10:20,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-13 22:10:20,646 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 63 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-02-13 22:10:20,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:20,647 INFO L225 Difference]: With dead ends: 69 [2023-02-13 22:10:20,647 INFO L226 Difference]: Without dead ends: 67 [2023-02-13 22:10:20,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 88 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1125 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=320, Invalid=6000, Unknown=0, NotChecked=0, Total=6320 [2023-02-13 22:10:20,648 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 34 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 2021 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 2037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:20,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 662 Invalid, 2037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2021 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-02-13 22:10:20,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-02-13 22:10:20,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2023-02-13 22:10:20,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:20,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2023-02-13 22:10:20,656 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 61 [2023-02-13 22:10:20,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:20,656 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2023-02-13 22:10:20,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.9523809523809523) internal successors, (123), 63 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:20,657 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2023-02-13 22:10:20,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2023-02-13 22:10:20,657 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:20,657 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:20,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-02-13 22:10:20,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-02-13 22:10:20,862 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:20,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:20,862 INFO L85 PathProgramCache]: Analyzing trace with hash 611957653, now seen corresponding path program 27 times [2023-02-13 22:10:20,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:20,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418219885] [2023-02-13 22:10:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:20,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:21,283 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 261 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:21,283 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:21,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418219885] [2023-02-13 22:10:21,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418219885] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:21,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023288112] [2023-02-13 22:10:21,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:10:21,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:21,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:21,297 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:21,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-02-13 22:10:21,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-02-13 22:10:21,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:21,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 32 conjunts are in the unsatisfiable core [2023-02-13 22:10:21,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:22,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 301 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:22,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023288112] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:22,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:22,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2023-02-13 22:10:22,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137877847] [2023-02-13 22:10:22,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:22,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-02-13 22:10:22,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:22,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-02-13 22:10:22,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2023-02-13 22:10:22,611 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:22,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:22,855 INFO L93 Difference]: Finished difference Result 121 states and 123 transitions. [2023-02-13 22:10:22,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-13 22:10:22,856 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2023-02-13 22:10:22,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:22,856 INFO L225 Difference]: With dead ends: 121 [2023-02-13 22:10:22,856 INFO L226 Difference]: Without dead ends: 72 [2023-02-13 22:10:22,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 81 SyntacticMatches, 30 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1935 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2023-02-13 22:10:22,857 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 149 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:22,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [149 Valid, 128 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:10:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2023-02-13 22:10:22,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2023-02-13 22:10:22,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:22,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2023-02-13 22:10:22,867 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 64 [2023-02-13 22:10:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:22,867 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2023-02-13 22:10:22,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.28) internal successors, (114), 50 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:22,868 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2023-02-13 22:10:22,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-02-13 22:10:22,868 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:22,868 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:22,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-02-13 22:10:23,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:23,074 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:23,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:23,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1317817547, now seen corresponding path program 28 times [2023-02-13 22:10:23,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:23,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311276161] [2023-02-13 22:10:23,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:23,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:23,991 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:23,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:23,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311276161] [2023-02-13 22:10:23,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311276161] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:23,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901264213] [2023-02-13 22:10:23,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:10:23,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:23,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:24,009 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:24,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-02-13 22:10:24,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:10:24,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:24,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 77 conjunts are in the unsatisfiable core [2023-02-13 22:10:24,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:24,401 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:10:24,873 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 47 treesize of output 23 [2023-02-13 22:10:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:24,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:25,044 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 16 treesize of output 14 [2023-02-13 22:10:25,045 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:25,048 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 16 treesize of output 14 [2023-02-13 22:10:25,050 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:25,078 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:25,078 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901264213] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:25,078 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:25,078 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 35, 35] total 52 [2023-02-13 22:10:25,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731915294] [2023-02-13 22:10:25,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:25,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-02-13 22:10:25,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:25,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-02-13 22:10:25,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2514, Unknown=0, NotChecked=0, Total=2652 [2023-02-13 22:10:25,080 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:25,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:25,821 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2023-02-13 22:10:25,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-13 22:10:25,821 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-02-13 22:10:25,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:25,822 INFO L225 Difference]: With dead ends: 73 [2023-02-13 22:10:25,822 INFO L226 Difference]: Without dead ends: 71 [2023-02-13 22:10:25,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 107 SyntacticMatches, 5 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=294, Invalid=4962, Unknown=0, NotChecked=0, Total=5256 [2023-02-13 22:10:25,823 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 32 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 2006 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 2023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 2006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:25,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 628 Invalid, 2023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 2006 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-13 22:10:25,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2023-02-13 22:10:25,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 69. [2023-02-13 22:10:25,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:25,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2023-02-13 22:10:25,833 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 65 [2023-02-13 22:10:25,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:25,834 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2023-02-13 22:10:25,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.173076923076923) internal successors, (113), 52 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2023-02-13 22:10:25,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-02-13 22:10:25,834 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:25,834 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:25,842 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:26,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:26,040 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:26,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:26,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1188716590, now seen corresponding path program 29 times [2023-02-13 22:10:26,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:26,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687228522] [2023-02-13 22:10:26,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:26,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:26,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 302 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:26,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:26,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687228522] [2023-02-13 22:10:26,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687228522] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:26,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384358382] [2023-02-13 22:10:26,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:10:26,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:26,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:26,504 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:26,506 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-02-13 22:10:26,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-02-13 22:10:26,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:26,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 34 conjunts are in the unsatisfiable core [2023-02-13 22:10:26,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:27,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 345 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:27,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384358382] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:27,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:27,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2023-02-13 22:10:27,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191375941] [2023-02-13 22:10:27,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:27,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-13 22:10:27,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:27,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-13 22:10:27,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2023-02-13 22:10:27,598 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:27,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:27,834 INFO L93 Difference]: Finished difference Result 128 states and 130 transitions. [2023-02-13 22:10:27,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-02-13 22:10:27,834 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-02-13 22:10:27,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:27,835 INFO L225 Difference]: With dead ends: 128 [2023-02-13 22:10:27,835 INFO L226 Difference]: Without dead ends: 76 [2023-02-13 22:10:27,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 86 SyntacticMatches, 32 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2185 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2023-02-13 22:10:27,836 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 147 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:27,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 140 Invalid, 359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:10:27,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-02-13 22:10:27,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2023-02-13 22:10:27,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0289855072463767) internal successors, (71), 69 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:27,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2023-02-13 22:10:27,848 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 68 [2023-02-13 22:10:27,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:27,848 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2023-02-13 22:10:27,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:27,848 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2023-02-13 22:10:27,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-02-13 22:10:27,849 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:27,849 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:27,854 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:28,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-02-13 22:10:28,055 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:28,055 INFO L85 PathProgramCache]: Analyzing trace with hash -2004834808, now seen corresponding path program 30 times [2023-02-13 22:10:28,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:28,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201088505] [2023-02-13 22:10:28,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:28,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:28,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:28,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201088505] [2023-02-13 22:10:28,982 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201088505] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:28,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967164834] [2023-02-13 22:10:28,982 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:10:28,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:28,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:28,985 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:29,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-02-13 22:10:29,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2023-02-13 22:10:29,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:29,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 81 conjunts are in the unsatisfiable core [2023-02-13 22:10:29,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:29,675 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:10:30,405 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 47 treesize of output 23 [2023-02-13 22:10:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:30,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:30,686 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 16 treesize of output 14 [2023-02-13 22:10:30,687 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:30,690 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 16 treesize of output 14 [2023-02-13 22:10:30,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:30,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967164834] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:30,730 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:30,730 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 37, 37] total 55 [2023-02-13 22:10:30,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135204946] [2023-02-13 22:10:30,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:30,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2023-02-13 22:10:30,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:30,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2023-02-13 22:10:30,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2824, Unknown=0, NotChecked=0, Total=2970 [2023-02-13 22:10:30,732 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 55 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:31,860 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2023-02-13 22:10:31,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-13 22:10:31,860 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 55 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2023-02-13 22:10:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:31,861 INFO L225 Difference]: With dead ends: 77 [2023-02-13 22:10:31,861 INFO L226 Difference]: Without dead ends: 75 [2023-02-13 22:10:31,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 114 SyntacticMatches, 5 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=309, Invalid=5543, Unknown=0, NotChecked=0, Total=5852 [2023-02-13 22:10:31,862 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 2164 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 651 SdHoareTripleChecker+Invalid, 2183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:31,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 651 Invalid, 2183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2164 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-02-13 22:10:31,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-02-13 22:10:31,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2023-02-13 22:10:31,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 72 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:31,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2023-02-13 22:10:31,874 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 69 [2023-02-13 22:10:31,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:31,874 INFO L495 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2023-02-13 22:10:31,875 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.1818181818181817) internal successors, (120), 55 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:31,875 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2023-02-13 22:10:31,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2023-02-13 22:10:31,875 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:31,875 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:31,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-02-13 22:10:32,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:32,081 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:32,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:32,082 INFO L85 PathProgramCache]: Analyzing trace with hash -213753483, now seen corresponding path program 31 times [2023-02-13 22:10:32,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:32,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883648086] [2023-02-13 22:10:32,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:32,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:32,579 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 346 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:32,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:32,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883648086] [2023-02-13 22:10:32,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883648086] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:32,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69724531] [2023-02-13 22:10:32,579 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:10:32,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:32,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:32,580 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:32,581 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-02-13 22:10:32,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:32,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 36 conjunts are in the unsatisfiable core [2023-02-13 22:10:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:33,128 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 392 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:33,472 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69724531] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:33,472 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:33,473 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 56 [2023-02-13 22:10:33,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472996563] [2023-02-13 22:10:33,473 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:33,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-02-13 22:10:33,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:33,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-02-13 22:10:33,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=725, Invalid=2355, Unknown=0, NotChecked=0, Total=3080 [2023-02-13 22:10:33,474 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:33,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:33,723 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2023-02-13 22:10:33,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-02-13 22:10:33,723 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2023-02-13 22:10:33,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:33,724 INFO L225 Difference]: With dead ends: 135 [2023-02-13 22:10:33,724 INFO L226 Difference]: Without dead ends: 80 [2023-02-13 22:10:33,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 91 SyntacticMatches, 34 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2450 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1235, Invalid=4021, Unknown=0, NotChecked=0, Total=5256 [2023-02-13 22:10:33,726 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 185 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:33,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 131 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:10:33,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-02-13 22:10:33,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2023-02-13 22:10:33,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0273972602739727) internal successors, (75), 73 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:33,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2023-02-13 22:10:33,737 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 72 [2023-02-13 22:10:33,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:33,737 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2023-02-13 22:10:33,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.2857142857142856) internal successors, (128), 56 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:33,738 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2023-02-13 22:10:33,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2023-02-13 22:10:33,738 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:33,738 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:33,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:33,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:33,943 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:33,944 INFO L85 PathProgramCache]: Analyzing trace with hash -190620501, now seen corresponding path program 32 times [2023-02-13 22:10:33,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:33,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563598340] [2023-02-13 22:10:33,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:33,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:33,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:34,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:34,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563598340] [2023-02-13 22:10:34,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563598340] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:34,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685279225] [2023-02-13 22:10:34,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:10:34,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:34,921 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:34,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-02-13 22:10:35,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:10:35,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:35,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 82 conjunts are in the unsatisfiable core [2023-02-13 22:10:35,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:35,587 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:10:36,599 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:36,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:36,810 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 16 treesize of output 14 [2023-02-13 22:10:36,812 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:36,816 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 16 treesize of output 14 [2023-02-13 22:10:36,818 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:36,864 INFO L134 CoverageAnalysis]: Checked inductivity of 545 backedges. 0 proven. 545 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:36,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685279225] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:36,864 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:36,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 75 [2023-02-13 22:10:36,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976856120] [2023-02-13 22:10:36,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:36,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-02-13 22:10:36,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:36,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-02-13 22:10:36,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=5330, Unknown=0, NotChecked=0, Total=5550 [2023-02-13 22:10:36,865 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 75 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:38,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:38,243 INFO L93 Difference]: Finished difference Result 81 states and 82 transitions. [2023-02-13 22:10:38,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-02-13 22:10:38,243 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2023-02-13 22:10:38,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:38,244 INFO L225 Difference]: With dead ends: 81 [2023-02-13 22:10:38,244 INFO L226 Difference]: Without dead ends: 79 [2023-02-13 22:10:38,244 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 106 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1593 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=380, Invalid=8550, Unknown=0, NotChecked=0, Total=8930 [2023-02-13 22:10:38,244 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 43 mSDsluCounter, 991 mSDsCounter, 0 mSdLazyCounter, 2921 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 1014 SdHoareTripleChecker+Invalid, 2940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:38,245 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 1014 Invalid, 2940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2921 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-13 22:10:38,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-02-13 22:10:38,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2023-02-13 22:10:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:38,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 78 transitions. [2023-02-13 22:10:38,257 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 78 transitions. Word has length 73 [2023-02-13 22:10:38,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:38,257 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 78 transitions. [2023-02-13 22:10:38,257 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.96) internal successors, (147), 75 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:38,257 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 78 transitions. [2023-02-13 22:10:38,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2023-02-13 22:10:38,258 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:38,258 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:38,263 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:38,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-02-13 22:10:38,463 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:38,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:38,464 INFO L85 PathProgramCache]: Analyzing trace with hash -823786510, now seen corresponding path program 33 times [2023-02-13 22:10:38,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:38,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326413467] [2023-02-13 22:10:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:38,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:38,892 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 393 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:38,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:38,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326413467] [2023-02-13 22:10:38,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326413467] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:38,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5863433] [2023-02-13 22:10:38,910 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:10:38,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:38,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:38,911 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:38,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-02-13 22:10:40,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-02-13 22:10:40,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:40,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 38 conjunts are in the unsatisfiable core [2023-02-13 22:10:40,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:40,504 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:40,504 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:40,792 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 442 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:40,792 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5863433] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:40,792 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:40,792 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 59 [2023-02-13 22:10:40,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721632502] [2023-02-13 22:10:40,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:40,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2023-02-13 22:10:40,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:40,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2023-02-13 22:10:40,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=2619, Unknown=0, NotChecked=0, Total=3422 [2023-02-13 22:10:40,794 INFO L87 Difference]: Start difference. First operand 77 states and 78 transitions. Second operand has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:41,096 INFO L93 Difference]: Finished difference Result 142 states and 144 transitions. [2023-02-13 22:10:41,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-13 22:10:41,097 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2023-02-13 22:10:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:41,098 INFO L225 Difference]: With dead ends: 142 [2023-02-13 22:10:41,098 INFO L226 Difference]: Without dead ends: 84 [2023-02-13 22:10:41,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 96 SyntacticMatches, 36 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2730 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1370, Invalid=4482, Unknown=0, NotChecked=0, Total=5852 [2023-02-13 22:10:41,099 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 201 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:41,099 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 144 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:10:41,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2023-02-13 22:10:41,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 78. [2023-02-13 22:10:41,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:41,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2023-02-13 22:10:41,111 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 76 [2023-02-13 22:10:41,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:41,112 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2023-02-13 22:10:41,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.288135593220339) internal successors, (135), 59 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:41,112 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2023-02-13 22:10:41,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-02-13 22:10:41,112 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:41,112 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:41,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:41,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-02-13 22:10:41,319 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:41,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:41,319 INFO L85 PathProgramCache]: Analyzing trace with hash -196447192, now seen corresponding path program 34 times [2023-02-13 22:10:41,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:41,319 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146879804] [2023-02-13 22:10:41,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:41,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:41,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:42,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:42,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146879804] [2023-02-13 22:10:42,394 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146879804] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:42,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328825586] [2023-02-13 22:10:42,394 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:10:42,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:42,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:42,395 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:42,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-02-13 22:10:42,890 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:10:42,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:42,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 91 conjunts are in the unsatisfiable core [2023-02-13 22:10:42,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:43,449 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:10:44,218 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:44,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:44,412 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 16 treesize of output 14 [2023-02-13 22:10:44,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:44,417 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 16 treesize of output 14 [2023-02-13 22:10:44,429 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 613 backedges. 0 proven. 613 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:44,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328825586] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:44,477 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:44,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 41, 41] total 81 [2023-02-13 22:10:44,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128062924] [2023-02-13 22:10:44,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:44,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2023-02-13 22:10:44,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:44,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2023-02-13 22:10:44,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=6237, Unknown=0, NotChecked=0, Total=6480 [2023-02-13 22:10:44,479 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 81 states, 81 states have (on average 1.9382716049382716) internal successors, (157), 81 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:45,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:45,964 INFO L93 Difference]: Finished difference Result 85 states and 86 transitions. [2023-02-13 22:10:45,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-02-13 22:10:45,964 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.9382716049382716) internal successors, (157), 81 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2023-02-13 22:10:45,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:45,965 INFO L225 Difference]: With dead ends: 85 [2023-02-13 22:10:45,965 INFO L226 Difference]: Without dead ends: 83 [2023-02-13 22:10:45,966 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 110 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=445, Invalid=10475, Unknown=0, NotChecked=0, Total=10920 [2023-02-13 22:10:45,966 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 3035 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 3056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:45,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 945 Invalid, 3056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3035 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-13 22:10:45,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-02-13 22:10:45,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2023-02-13 22:10:45,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.025) internal successors, (82), 80 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:45,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2023-02-13 22:10:45,979 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 77 [2023-02-13 22:10:45,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:45,980 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2023-02-13 22:10:45,980 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.9382716049382716) internal successors, (157), 81 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:45,980 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2023-02-13 22:10:45,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2023-02-13 22:10:45,980 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:45,980 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:45,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:46,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-02-13 22:10:46,187 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:46,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1686921045, now seen corresponding path program 35 times [2023-02-13 22:10:46,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:46,188 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760804618] [2023-02-13 22:10:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:46,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:46,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:46,810 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 443 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:46,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:46,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760804618] [2023-02-13 22:10:46,811 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760804618] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:46,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665140845] [2023-02-13 22:10:46,811 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:10:46,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:46,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:46,812 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:46,814 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-02-13 22:10:47,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-02-13 22:10:47,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:47,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 40 conjunts are in the unsatisfiable core [2023-02-13 22:10:47,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:47,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 495 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:47,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665140845] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:47,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:47,838 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 62 [2023-02-13 22:10:47,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543315852] [2023-02-13 22:10:47,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:47,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-02-13 22:10:47,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:47,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-02-13 22:10:47,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=2897, Unknown=0, NotChecked=0, Total=3782 [2023-02-13 22:10:47,840 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:48,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:48,220 INFO L93 Difference]: Finished difference Result 149 states and 151 transitions. [2023-02-13 22:10:48,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-02-13 22:10:48,220 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2023-02-13 22:10:48,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:48,221 INFO L225 Difference]: With dead ends: 149 [2023-02-13 22:10:48,221 INFO L226 Difference]: Without dead ends: 88 [2023-02-13 22:10:48,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 101 SyntacticMatches, 38 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3025 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1512, Invalid=4968, Unknown=0, NotChecked=0, Total=6480 [2023-02-13 22:10:48,223 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 167 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:48,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 174 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:10:48,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2023-02-13 22:10:48,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2023-02-13 22:10:48,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:48,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2023-02-13 22:10:48,237 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 80 [2023-02-13 22:10:48,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:48,237 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2023-02-13 22:10:48,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.2903225806451615) internal successors, (142), 62 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2023-02-13 22:10:48,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-02-13 22:10:48,238 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:48,238 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:48,244 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:48,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:48,444 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:48,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1697760395, now seen corresponding path program 36 times [2023-02-13 22:10:48,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:48,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088916012] [2023-02-13 22:10:48,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:48,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:49,546 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:49,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:49,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088916012] [2023-02-13 22:10:49,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088916012] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:49,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674046137] [2023-02-13 22:10:49,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:10:49,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:49,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:49,549 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:49,551 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-02-13 22:10:50,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2023-02-13 22:10:50,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:50,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 93 conjunts are in the unsatisfiable core [2023-02-13 22:10:50,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:50,835 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:10:51,821 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 47 treesize of output 23 [2023-02-13 22:10:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:51,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:52,115 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 16 treesize of output 14 [2023-02-13 22:10:52,117 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:52,120 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 16 treesize of output 14 [2023-02-13 22:10:52,122 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:52,156 INFO L134 CoverageAnalysis]: Checked inductivity of 685 backedges. 0 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:52,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674046137] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:52,157 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:52,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 43, 43] total 64 [2023-02-13 22:10:52,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255916820] [2023-02-13 22:10:52,157 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:52,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-02-13 22:10:52,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:52,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-02-13 22:10:52,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3862, Unknown=0, NotChecked=0, Total=4032 [2023-02-13 22:10:52,159 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 64 states, 64 states have (on average 2.203125) internal successors, (141), 64 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:53,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:53,447 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2023-02-13 22:10:53,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-13 22:10:53,447 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.203125) internal successors, (141), 64 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2023-02-13 22:10:53,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:53,447 INFO L225 Difference]: With dead ends: 89 [2023-02-13 22:10:53,448 INFO L226 Difference]: Without dead ends: 87 [2023-02-13 22:10:53,448 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 135 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=344, Invalid=7312, Unknown=0, NotChecked=0, Total=7656 [2023-02-13 22:10:53,449 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 921 mSDsCounter, 0 mSdLazyCounter, 3048 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 3069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:53,449 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 945 Invalid, 3069 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3048 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-13 22:10:53,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-02-13 22:10:53,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 85. [2023-02-13 22:10:53,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0238095238095237) internal successors, (86), 84 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:53,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2023-02-13 22:10:53,463 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 81 [2023-02-13 22:10:53,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:53,464 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2023-02-13 22:10:53,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.203125) internal successors, (141), 64 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:53,464 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2023-02-13 22:10:53,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-02-13 22:10:53,464 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:53,464 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:53,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:53,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-02-13 22:10:53,671 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:53,671 INFO L85 PathProgramCache]: Analyzing trace with hash 449843218, now seen corresponding path program 37 times [2023-02-13 22:10:53,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:53,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415488452] [2023-02-13 22:10:53,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:53,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:54,273 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 496 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:54,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:54,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415488452] [2023-02-13 22:10:54,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415488452] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:54,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363600176] [2023-02-13 22:10:54,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:10:54,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:54,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:54,276 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:54,277 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-02-13 22:10:54,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:54,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 42 conjunts are in the unsatisfiable core [2023-02-13 22:10:54,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:54,920 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:54,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:55,438 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 551 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:55,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363600176] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:55,438 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:55,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 65 [2023-02-13 22:10:55,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020075032] [2023-02-13 22:10:55,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:55,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-02-13 22:10:55,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:55,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-02-13 22:10:55,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=971, Invalid=3189, Unknown=0, NotChecked=0, Total=4160 [2023-02-13 22:10:55,440 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:55,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:10:55,736 INFO L93 Difference]: Finished difference Result 156 states and 158 transitions. [2023-02-13 22:10:55,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-02-13 22:10:55,736 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2023-02-13 22:10:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:10:55,737 INFO L225 Difference]: With dead ends: 156 [2023-02-13 22:10:55,737 INFO L226 Difference]: Without dead ends: 92 [2023-02-13 22:10:55,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 106 SyntacticMatches, 40 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3335 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1661, Invalid=5479, Unknown=0, NotChecked=0, Total=7140 [2023-02-13 22:10:55,739 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 259 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:10:55,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 188 Invalid, 519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:10:55,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2023-02-13 22:10:55,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2023-02-13 22:10:55,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.0235294117647058) internal successors, (87), 85 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:55,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2023-02-13 22:10:55,754 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 84 [2023-02-13 22:10:55,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:10:55,754 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2023-02-13 22:10:55,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.292307692307692) internal successors, (149), 65 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:10:55,754 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2023-02-13 22:10:55,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2023-02-13 22:10:55,755 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:10:55,755 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:10:55,760 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2023-02-13 22:10:55,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-02-13 22:10:55,960 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:10:55,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:10:55,961 INFO L85 PathProgramCache]: Analyzing trace with hash -751572408, now seen corresponding path program 38 times [2023-02-13 22:10:55,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:10:55,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278836317] [2023-02-13 22:10:55,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:10:55,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:10:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:10:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:57,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:10:57,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278836317] [2023-02-13 22:10:57,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278836317] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:10:57,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818397897] [2023-02-13 22:10:57,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:10:57,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:10:57,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:10:57,192 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:10:57,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-02-13 22:10:57,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:10:57,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:10:57,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 134 conjunts are in the unsatisfiable core [2023-02-13 22:10:57,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:10:57,919 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:10:58,775 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:58,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:10:58,940 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 16 treesize of output 14 [2023-02-13 22:10:58,942 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:58,945 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 16 treesize of output 14 [2023-02-13 22:10:58,947 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:10:58,996 INFO L134 CoverageAnalysis]: Checked inductivity of 761 backedges. 0 proven. 761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:10:58,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818397897] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:10:58,997 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:10:58,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 87 [2023-02-13 22:10:58,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885770907] [2023-02-13 22:10:58,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:10:59,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2023-02-13 22:10:59,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:10:59,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2023-02-13 22:10:59,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=7226, Unknown=0, NotChecked=0, Total=7482 [2023-02-13 22:10:59,007 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 87 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:00,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:11:00,443 INFO L93 Difference]: Finished difference Result 93 states and 94 transitions. [2023-02-13 22:11:00,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-13 22:11:00,443 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2023-02-13 22:11:00,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:11:00,444 INFO L225 Difference]: With dead ends: 93 [2023-02-13 22:11:00,444 INFO L226 Difference]: Without dead ends: 91 [2023-02-13 22:11:00,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 124 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2142 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=440, Invalid=11550, Unknown=0, NotChecked=0, Total=11990 [2023-02-13 22:11:00,445 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 46 mSDsluCounter, 1349 mSDsCounter, 0 mSdLazyCounter, 3996 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 4018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 3996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-02-13 22:11:00,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 1375 Invalid, 4018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 3996 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-02-13 22:11:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-02-13 22:11:00,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2023-02-13 22:11:00,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 90 transitions. [2023-02-13 22:11:00,461 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 90 transitions. Word has length 85 [2023-02-13 22:11:00,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:11:00,462 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 90 transitions. [2023-02-13 22:11:00,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.9655172413793103) internal successors, (171), 87 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:00,462 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 90 transitions. [2023-02-13 22:11:00,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2023-02-13 22:11:00,462 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:11:00,462 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:11:00,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2023-02-13 22:11:00,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:00,667 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:11:00,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:11:00,668 INFO L85 PathProgramCache]: Analyzing trace with hash -424299211, now seen corresponding path program 39 times [2023-02-13 22:11:00,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:11:00,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557397071] [2023-02-13 22:11:00,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:11:00,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:11:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:11:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 552 proven. 268 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:01,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:11:01,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557397071] [2023-02-13 22:11:01,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557397071] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:11:01,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543586877] [2023-02-13 22:11:01,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:11:01,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:01,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:11:01,188 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:11:01,191 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-02-13 22:11:02,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2023-02-13 22:11:02,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:11:02,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 44 conjunts are in the unsatisfiable core [2023-02-13 22:11:02,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:11:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:03,436 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:11:03,836 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 610 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:03,837 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543586877] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:11:03,837 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:11:03,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 68 [2023-02-13 22:11:03,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825355979] [2023-02-13 22:11:03,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:11:03,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-02-13 22:11:03,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:11:03,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-02-13 22:11:03,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1061, Invalid=3495, Unknown=0, NotChecked=0, Total=4556 [2023-02-13 22:11:03,844 INFO L87 Difference]: Start difference. First operand 89 states and 90 transitions. Second operand has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:11:04,123 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2023-02-13 22:11:04,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-02-13 22:11:04,123 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2023-02-13 22:11:04,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:11:04,124 INFO L225 Difference]: With dead ends: 163 [2023-02-13 22:11:04,124 INFO L226 Difference]: Without dead ends: 96 [2023-02-13 22:11:04,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 111 SyntacticMatches, 42 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3660 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1817, Invalid=6015, Unknown=0, NotChecked=0, Total=7832 [2023-02-13 22:11:04,126 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 173 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:11:04,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 232 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:11:04,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2023-02-13 22:11:04,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 90. [2023-02-13 22:11:04,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:04,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2023-02-13 22:11:04,142 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 88 [2023-02-13 22:11:04,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:11:04,143 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2023-02-13 22:11:04,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.2941176470588234) internal successors, (156), 68 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:04,143 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2023-02-13 22:11:04,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-02-13 22:11:04,143 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:11:04,143 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:11:04,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-02-13 22:11:04,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2023-02-13 22:11:04,352 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:11:04,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:11:04,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1198160789, now seen corresponding path program 40 times [2023-02-13 22:11:04,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:11:04,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654345313] [2023-02-13 22:11:04,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:11:04,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:11:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:11:05,567 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:05,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:11:05,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654345313] [2023-02-13 22:11:05,568 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654345313] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:11:05,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571665793] [2023-02-13 22:11:05,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:11:05,568 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:05,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:11:05,570 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:11:05,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-02-13 22:11:06,195 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:11:06,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:11:06,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 101 conjunts are in the unsatisfiable core [2023-02-13 22:11:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:11:06,249 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:11:07,412 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 47 treesize of output 23 [2023-02-13 22:11:07,442 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:07,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:11:07,677 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 16 treesize of output 14 [2023-02-13 22:11:07,679 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:11:07,681 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 16 treesize of output 14 [2023-02-13 22:11:07,684 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:11:07,722 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:07,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571665793] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:11:07,723 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:11:07,723 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 47, 47] total 70 [2023-02-13 22:11:07,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759091314] [2023-02-13 22:11:07,723 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:11:07,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-02-13 22:11:07,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:11:07,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-02-13 22:11:07,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=4644, Unknown=0, NotChecked=0, Total=4830 [2023-02-13 22:11:07,725 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 70 states, 70 states have (on average 2.2142857142857144) internal successors, (155), 70 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:11:09,149 INFO L93 Difference]: Finished difference Result 97 states and 98 transitions. [2023-02-13 22:11:09,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-02-13 22:11:09,149 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.2142857142857144) internal successors, (155), 70 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-02-13 22:11:09,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:11:09,149 INFO L225 Difference]: With dead ends: 97 [2023-02-13 22:11:09,150 INFO L226 Difference]: Without dead ends: 95 [2023-02-13 22:11:09,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 149 SyntacticMatches, 5 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1222 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=384, Invalid=8928, Unknown=0, NotChecked=0, Total=9312 [2023-02-13 22:11:09,151 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 36 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 3893 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 3916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3893 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-02-13 22:11:09,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 1187 Invalid, 3916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3893 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-02-13 22:11:09,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-02-13 22:11:09,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2023-02-13 22:11:09,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:09,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2023-02-13 22:11:09,168 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 89 [2023-02-13 22:11:09,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:11:09,168 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2023-02-13 22:11:09,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.2142857142857144) internal successors, (155), 70 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:09,169 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2023-02-13 22:11:09,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2023-02-13 22:11:09,169 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:11:09,169 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:11:09,179 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-02-13 22:11:09,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:09,379 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:11:09,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:11:09,379 INFO L85 PathProgramCache]: Analyzing trace with hash 1069925426, now seen corresponding path program 41 times [2023-02-13 22:11:09,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:11:09,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680119550] [2023-02-13 22:11:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:11:09,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:11:09,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:11:10,131 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 611 proven. 292 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:10,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:11:10,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680119550] [2023-02-13 22:11:10,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680119550] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:11:10,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620667493] [2023-02-13 22:11:10,132 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:11:10,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:10,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:11:10,133 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:11:10,136 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-02-13 22:11:10,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-02-13 22:11:10,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:11:10,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 46 conjunts are in the unsatisfiable core [2023-02-13 22:11:10,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:11:11,496 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:11,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:11:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 672 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:11,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620667493] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:11:11,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:11:11,870 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 71 [2023-02-13 22:11:11,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193453724] [2023-02-13 22:11:11,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:11:11,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2023-02-13 22:11:11,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:11:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2023-02-13 22:11:11,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1155, Invalid=3815, Unknown=0, NotChecked=0, Total=4970 [2023-02-13 22:11:11,872 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:12,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:11:12,164 INFO L93 Difference]: Finished difference Result 170 states and 172 transitions. [2023-02-13 22:11:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-02-13 22:11:12,164 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2023-02-13 22:11:12,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:11:12,165 INFO L225 Difference]: With dead ends: 170 [2023-02-13 22:11:12,165 INFO L226 Difference]: Without dead ends: 100 [2023-02-13 22:11:12,166 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 116 SyntacticMatches, 44 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4000 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1980, Invalid=6576, Unknown=0, NotChecked=0, Total=8556 [2023-02-13 22:11:12,171 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 277 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 546 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:11:12,173 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [277 Valid, 198 Invalid, 546 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:11:12,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-13 22:11:12,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 94. [2023-02-13 22:11:12,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.021505376344086) internal successors, (95), 93 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:12,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2023-02-13 22:11:12,193 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 92 [2023-02-13 22:11:12,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:11:12,193 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2023-02-13 22:11:12,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.295774647887324) internal successors, (163), 71 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:12,194 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2023-02-13 22:11:12,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-02-13 22:11:12,194 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:11:12,194 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:11:12,203 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2023-02-13 22:11:12,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:12,401 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:11:12,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:11:12,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1914636392, now seen corresponding path program 42 times [2023-02-13 22:11:12,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:11:12,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028701119] [2023-02-13 22:11:12,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:11:12,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:11:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:11:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:13,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:11:13,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028701119] [2023-02-13 22:11:13,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028701119] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:11:13,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643628324] [2023-02-13 22:11:13,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:11:13,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:13,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:11:13,720 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:11:13,721 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-02-13 22:11:15,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2023-02-13 22:11:15,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:11:15,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 107 conjunts are in the unsatisfiable core [2023-02-13 22:11:15,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:11:15,218 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:11:16,459 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 47 treesize of output 23 [2023-02-13 22:11:16,502 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:16,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:11:16,810 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 16 treesize of output 14 [2023-02-13 22:11:16,811 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:11:16,815 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 16 treesize of output 14 [2023-02-13 22:11:16,817 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:11:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 925 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:16,873 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643628324] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:11:16,873 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:11:16,873 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 49, 49] total 73 [2023-02-13 22:11:16,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725773864] [2023-02-13 22:11:16,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:11:16,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-02-13 22:11:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:11:16,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-02-13 22:11:16,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=5062, Unknown=0, NotChecked=0, Total=5256 [2023-02-13 22:11:16,875 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 73 states, 73 states have (on average 2.219178082191781) internal successors, (162), 73 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:11:18,671 INFO L93 Difference]: Finished difference Result 101 states and 102 transitions. [2023-02-13 22:11:18,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-02-13 22:11:18,671 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.219178082191781) internal successors, (162), 73 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-02-13 22:11:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:11:18,672 INFO L225 Difference]: With dead ends: 101 [2023-02-13 22:11:18,672 INFO L226 Difference]: Without dead ends: 99 [2023-02-13 22:11:18,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 156 SyntacticMatches, 5 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=399, Invalid=9701, Unknown=0, NotChecked=0, Total=10100 [2023-02-13 22:11:18,673 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 39 mSDsluCounter, 1300 mSDsCounter, 0 mSdLazyCounter, 4350 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 4374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 4350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:11:18,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1327 Invalid, 4374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 4350 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-13 22:11:18,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-02-13 22:11:18,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2023-02-13 22:11:18,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0208333333333333) internal successors, (98), 96 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:18,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2023-02-13 22:11:18,702 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 93 [2023-02-13 22:11:18,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:11:18,702 INFO L495 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2023-02-13 22:11:18,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.219178082191781) internal successors, (162), 73 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:18,702 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2023-02-13 22:11:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-02-13 22:11:18,703 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:11:18,703 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:11:18,709 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2023-02-13 22:11:18,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-02-13 22:11:18,909 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:11:18,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:11:18,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1771856661, now seen corresponding path program 43 times [2023-02-13 22:11:18,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:11:18,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101621317] [2023-02-13 22:11:18,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:11:18,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:11:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:11:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 673 proven. 317 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:19,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:11:19,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101621317] [2023-02-13 22:11:19,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101621317] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:11:19,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82746191] [2023-02-13 22:11:19,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:11:19,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:19,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:11:19,779 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:11:19,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-02-13 22:11:19,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:11:19,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 48 conjunts are in the unsatisfiable core [2023-02-13 22:11:19,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:11:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:20,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:11:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 737 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:21,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82746191] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:11:21,211 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:11:21,211 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 74 [2023-02-13 22:11:21,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270207959] [2023-02-13 22:11:21,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:11:21,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2023-02-13 22:11:21,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:11:21,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2023-02-13 22:11:21,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1253, Invalid=4149, Unknown=0, NotChecked=0, Total=5402 [2023-02-13 22:11:21,212 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:11:21,627 INFO L93 Difference]: Finished difference Result 177 states and 179 transitions. [2023-02-13 22:11:21,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-02-13 22:11:21,627 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2023-02-13 22:11:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:11:21,628 INFO L225 Difference]: With dead ends: 177 [2023-02-13 22:11:21,628 INFO L226 Difference]: Without dead ends: 104 [2023-02-13 22:11:21,629 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 121 SyntacticMatches, 46 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4355 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2150, Invalid=7162, Unknown=0, NotChecked=0, Total=9312 [2023-02-13 22:11:21,629 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 203 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:11:21,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 208 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:11:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2023-02-13 22:11:21,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 98. [2023-02-13 22:11:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:21,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2023-02-13 22:11:21,648 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 96 [2023-02-13 22:11:21,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:11:21,649 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2023-02-13 22:11:21,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.2972972972972974) internal successors, (170), 74 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:21,649 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2023-02-13 22:11:21,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-02-13 22:11:21,649 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:11:21,649 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:11:21,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-02-13 22:11:21,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-02-13 22:11:21,855 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:11:21,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:11:21,855 INFO L85 PathProgramCache]: Analyzing trace with hash -2001953717, now seen corresponding path program 44 times [2023-02-13 22:11:21,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:11:21,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139987239] [2023-02-13 22:11:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:11:21,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:11:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:11:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:23,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:11:23,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139987239] [2023-02-13 22:11:23,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139987239] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:11:23,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853980247] [2023-02-13 22:11:23,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:11:23,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:23,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:11:23,326 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:11:23,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-02-13 22:11:23,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:11:23,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:11:23,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 152 conjunts are in the unsatisfiable core [2023-02-13 22:11:23,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:11:24,177 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:11:25,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:25,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:11:25,505 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 16 treesize of output 14 [2023-02-13 22:11:25,507 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:11:25,510 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 16 treesize of output 14 [2023-02-13 22:11:25,511 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:11:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 1013 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:25,563 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853980247] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:11:25,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:11:25,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 99 [2023-02-13 22:11:25,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014386426] [2023-02-13 22:11:25,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:11:25,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2023-02-13 22:11:25,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:11:25,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2023-02-13 22:11:25,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=9410, Unknown=0, NotChecked=0, Total=9702 [2023-02-13 22:11:25,567 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 99 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 99 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:27,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:11:27,910 INFO L93 Difference]: Finished difference Result 105 states and 106 transitions. [2023-02-13 22:11:27,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-02-13 22:11:27,911 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 99 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2023-02-13 22:11:27,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:11:27,911 INFO L225 Difference]: With dead ends: 105 [2023-02-13 22:11:27,911 INFO L226 Difference]: Without dead ends: 103 [2023-02-13 22:11:27,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 142 SyntacticMatches, 3 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2772 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=500, Invalid=15000, Unknown=0, NotChecked=0, Total=15500 [2023-02-13 22:11:27,913 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 38 mSDsluCounter, 1704 mSDsCounter, 0 mSdLazyCounter, 5192 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1733 SdHoareTripleChecker+Invalid, 5216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 5192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-13 22:11:27,913 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1733 Invalid, 5216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 5192 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-13 22:11:27,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-02-13 22:11:27,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2023-02-13 22:11:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:27,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 102 transitions. [2023-02-13 22:11:27,934 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 102 transitions. Word has length 97 [2023-02-13 22:11:27,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:11:27,934 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 102 transitions. [2023-02-13 22:11:27,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.9696969696969697) internal successors, (195), 99 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:27,934 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 102 transitions. [2023-02-13 22:11:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2023-02-13 22:11:27,934 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:11:27,935 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:11:27,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2023-02-13 22:11:28,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-02-13 22:11:28,142 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:11:28,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:11:28,142 INFO L85 PathProgramCache]: Analyzing trace with hash -282517422, now seen corresponding path program 45 times [2023-02-13 22:11:28,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:11:28,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19487398] [2023-02-13 22:11:28,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:11:28,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:11:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:11:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 738 proven. 343 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:28,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:11:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19487398] [2023-02-13 22:11:28,909 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19487398] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:11:28,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105986826] [2023-02-13 22:11:28,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:11:28,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:28,909 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:11:28,920 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:11:28,921 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-02-13 22:11:33,123 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-02-13 22:11:33,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:11:33,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 50 conjunts are in the unsatisfiable core [2023-02-13 22:11:33,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:11:34,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:34,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:11:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 805 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:34,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105986826] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:11:34,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:11:34,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 77 [2023-02-13 22:11:34,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425050950] [2023-02-13 22:11:34,565 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:11:34,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-02-13 22:11:34,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:11:34,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-02-13 22:11:34,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1355, Invalid=4497, Unknown=0, NotChecked=0, Total=5852 [2023-02-13 22:11:34,572 INFO L87 Difference]: Start difference. First operand 101 states and 102 transitions. Second operand has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:35,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:11:35,036 INFO L93 Difference]: Finished difference Result 184 states and 186 transitions. [2023-02-13 22:11:35,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-02-13 22:11:35,036 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2023-02-13 22:11:35,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:11:35,037 INFO L225 Difference]: With dead ends: 184 [2023-02-13 22:11:35,037 INFO L226 Difference]: Without dead ends: 108 [2023-02-13 22:11:35,038 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 126 SyntacticMatches, 48 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4725 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2327, Invalid=7773, Unknown=0, NotChecked=0, Total=10100 [2023-02-13 22:11:35,038 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 251 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:11:35,038 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 214 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:11:35,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-02-13 22:11:35,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 102. [2023-02-13 22:11:35,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2023-02-13 22:11:35,064 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 100 [2023-02-13 22:11:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:11:35,065 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2023-02-13 22:11:35,065 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.2987012987012987) internal successors, (177), 77 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2023-02-13 22:11:35,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-02-13 22:11:35,065 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:11:35,065 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:11:35,072 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-02-13 22:11:35,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:35,272 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:11:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:11:35,272 INFO L85 PathProgramCache]: Analyzing trace with hash 745393800, now seen corresponding path program 46 times [2023-02-13 22:11:35,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:11:35,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621502812] [2023-02-13 22:11:35,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:11:35,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:11:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:11:36,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:36,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:11:36,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621502812] [2023-02-13 22:11:36,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621502812] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:11:36,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253322132] [2023-02-13 22:11:36,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:11:36,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:36,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:11:36,970 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:11:36,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-02-13 22:11:38,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:11:38,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:11:38,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 115 conjunts are in the unsatisfiable core [2023-02-13 22:11:38,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:11:39,866 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:11:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:41,437 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:11:41,691 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 16 treesize of output 14 [2023-02-13 22:11:41,692 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:11:41,696 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 16 treesize of output 14 [2023-02-13 22:11:41,697 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:11:41,735 INFO L134 CoverageAnalysis]: Checked inductivity of 1105 backedges. 0 proven. 1105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:41,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253322132] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:11:41,735 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:11:41,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 53, 53] total 105 [2023-02-13 22:11:41,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90347359] [2023-02-13 22:11:41,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:11:41,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-02-13 22:11:41,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:11:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-02-13 22:11:41,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=10605, Unknown=0, NotChecked=0, Total=10920 [2023-02-13 22:11:41,738 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 105 states, 105 states have (on average 1.9523809523809523) internal successors, (205), 105 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:43,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:11:43,543 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2023-02-13 22:11:43,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-02-13 22:11:43,551 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.9523809523809523) internal successors, (205), 105 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2023-02-13 22:11:43,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:11:43,552 INFO L225 Difference]: With dead ends: 109 [2023-02-13 22:11:43,552 INFO L226 Difference]: Without dead ends: 107 [2023-02-13 22:11:43,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 146 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3363 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=565, Invalid=17525, Unknown=0, NotChecked=0, Total=18090 [2023-02-13 22:11:43,554 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 51 mSDsluCounter, 1750 mSDsCounter, 0 mSdLazyCounter, 5635 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 5663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 5635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:11:43,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1779 Invalid, 5663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 5635 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-02-13 22:11:43,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2023-02-13 22:11:43,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2023-02-13 22:11:43,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:43,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 106 transitions. [2023-02-13 22:11:43,613 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 106 transitions. Word has length 101 [2023-02-13 22:11:43,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:11:43,613 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 106 transitions. [2023-02-13 22:11:43,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.9523809523809523) internal successors, (205), 105 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:43,614 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 106 transitions. [2023-02-13 22:11:43,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2023-02-13 22:11:43,614 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:11:43,614 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:11:43,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2023-02-13 22:11:43,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-02-13 22:11:43,822 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:11:43,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:11:43,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1050568949, now seen corresponding path program 47 times [2023-02-13 22:11:43,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:11:43,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705156293] [2023-02-13 22:11:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:11:43,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:11:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:11:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 806 proven. 370 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:44,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:11:44,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705156293] [2023-02-13 22:11:44,739 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705156293] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:11:44,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971231267] [2023-02-13 22:11:44,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:11:44,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:44,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:11:44,740 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:11:44,742 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-02-13 22:11:48,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2023-02-13 22:11:48,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:11:48,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 511 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-13 22:11:48,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:11:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:49,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:11:49,551 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 876 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:49,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971231267] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:11:49,551 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:11:49,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 80 [2023-02-13 22:11:49,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729747414] [2023-02-13 22:11:49,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:11:49,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-02-13 22:11:49,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:11:49,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-02-13 22:11:49,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1461, Invalid=4859, Unknown=0, NotChecked=0, Total=6320 [2023-02-13 22:11:49,554 INFO L87 Difference]: Start difference. First operand 105 states and 106 transitions. Second operand has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:49,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:11:49,974 INFO L93 Difference]: Finished difference Result 191 states and 193 transitions. [2023-02-13 22:11:49,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-02-13 22:11:49,975 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2023-02-13 22:11:49,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:11:49,975 INFO L225 Difference]: With dead ends: 191 [2023-02-13 22:11:49,975 INFO L226 Difference]: Without dead ends: 112 [2023-02-13 22:11:49,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 131 SyntacticMatches, 50 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5110 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2511, Invalid=8409, Unknown=0, NotChecked=0, Total=10920 [2023-02-13 22:11:49,977 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 257 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:11:49,977 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 245 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:11:49,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2023-02-13 22:11:49,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 106. [2023-02-13 22:11:49,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.019047619047619) internal successors, (107), 105 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:49,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2023-02-13 22:11:49,998 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 104 [2023-02-13 22:11:49,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:11:49,999 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2023-02-13 22:11:49,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.3) internal successors, (184), 80 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:11:49,999 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2023-02-13 22:11:49,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-02-13 22:11:49,999 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:11:49,999 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:11:50,008 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-02-13 22:11:50,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-02-13 22:11:50,209 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:11:50,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:11:50,209 INFO L85 PathProgramCache]: Analyzing trace with hash -791344085, now seen corresponding path program 48 times [2023-02-13 22:11:50,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:11:50,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658984661] [2023-02-13 22:11:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:11:50,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:11:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:11:51,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:51,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:11:51,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658984661] [2023-02-13 22:11:51,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658984661] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:11:51,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643873796] [2023-02-13 22:11:51,677 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:11:51,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:11:51,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:11:51,679 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:11:51,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-02-13 22:11:56,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2023-02-13 22:11:56,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:11:56,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 112 conjunts are in the unsatisfiable core [2023-02-13 22:11:56,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:11:56,467 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:11:57,851 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 47 treesize of output 23 [2023-02-13 22:11:57,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:57,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:11:58,148 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 16 treesize of output 14 [2023-02-13 22:11:58,150 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:11:58,154 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 16 treesize of output 14 [2023-02-13 22:11:58,156 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:11:58,212 INFO L134 CoverageAnalysis]: Checked inductivity of 1201 backedges. 0 proven. 1201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:11:58,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643873796] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:11:58,213 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:11:58,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54, 54] total 80 [2023-02-13 22:11:58,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108954131] [2023-02-13 22:11:58,213 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:11:58,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-02-13 22:11:58,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:11:58,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-02-13 22:11:58,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=6112, Unknown=0, NotChecked=0, Total=6320 [2023-02-13 22:11:58,215 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 80 states, 80 states have (on average 2.2625) internal successors, (181), 80 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:00,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:12:00,580 INFO L93 Difference]: Finished difference Result 113 states and 114 transitions. [2023-02-13 22:12:00,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-02-13 22:12:00,581 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.2625) internal successors, (181), 80 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2023-02-13 22:12:00,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:12:00,582 INFO L225 Difference]: With dead ends: 113 [2023-02-13 22:12:00,582 INFO L226 Difference]: Without dead ends: 111 [2023-02-13 22:12:00,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 179 SyntacticMatches, 5 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=403, Invalid=11153, Unknown=0, NotChecked=0, Total=11556 [2023-02-13 22:12:00,583 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 40 mSDsluCounter, 1663 mSDsCounter, 0 mSdLazyCounter, 5228 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 5254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 5228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-02-13 22:12:00,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 1694 Invalid, 5254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 5228 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-02-13 22:12:00,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-02-13 22:12:00,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2023-02-13 22:12:00,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0185185185185186) internal successors, (110), 108 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:00,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2023-02-13 22:12:00,607 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 105 [2023-02-13 22:12:00,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:12:00,607 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2023-02-13 22:12:00,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.2625) internal successors, (181), 80 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:00,607 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2023-02-13 22:12:00,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-02-13 22:12:00,608 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:12:00,608 INFO L195 NwaCegarLoop]: trace histogram [26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:12:00,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-02-13 22:12:00,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:12:00,817 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:12:00,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:12:00,817 INFO L85 PathProgramCache]: Analyzing trace with hash 148644978, now seen corresponding path program 49 times [2023-02-13 22:12:00,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:12:00,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818484119] [2023-02-13 22:12:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:12:00,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:12:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:12:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 877 proven. 398 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:01,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:12:01,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818484119] [2023-02-13 22:12:01,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818484119] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:12:01,590 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196860054] [2023-02-13 22:12:01,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:12:01,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:12:01,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:12:01,592 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:12:01,595 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-02-13 22:12:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:12:01,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 54 conjunts are in the unsatisfiable core [2023-02-13 22:12:01,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:12:02,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:02,647 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:12:03,424 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 950 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:03,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196860054] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:12:03,424 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:12:03,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 83 [2023-02-13 22:12:03,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005222771] [2023-02-13 22:12:03,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:12:03,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2023-02-13 22:12:03,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:12:03,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2023-02-13 22:12:03,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1571, Invalid=5235, Unknown=0, NotChecked=0, Total=6806 [2023-02-13 22:12:03,426 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:03,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:12:03,846 INFO L93 Difference]: Finished difference Result 198 states and 200 transitions. [2023-02-13 22:12:03,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-02-13 22:12:03,846 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2023-02-13 22:12:03,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:12:03,847 INFO L225 Difference]: With dead ends: 198 [2023-02-13 22:12:03,847 INFO L226 Difference]: Without dead ends: 116 [2023-02-13 22:12:03,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 136 SyntacticMatches, 52 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5510 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2702, Invalid=9070, Unknown=0, NotChecked=0, Total=11772 [2023-02-13 22:12:03,849 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 281 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 281 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:12:03,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [281 Valid, 289 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:12:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2023-02-13 22:12:03,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2023-02-13 22:12:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.018348623853211) internal successors, (111), 109 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:03,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2023-02-13 22:12:03,872 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 108 [2023-02-13 22:12:03,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:12:03,873 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2023-02-13 22:12:03,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.3012048192771086) internal successors, (191), 83 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:03,873 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2023-02-13 22:12:03,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-02-13 22:12:03,873 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:12:03,874 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:12:03,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2023-02-13 22:12:04,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-02-13 22:12:04,080 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:12:04,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:12:04,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1946010456, now seen corresponding path program 50 times [2023-02-13 22:12:04,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:12:04,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515323658] [2023-02-13 22:12:04,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:12:04,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:12:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:12:05,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:05,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:12:05,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515323658] [2023-02-13 22:12:05,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515323658] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:12:05,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491401575] [2023-02-13 22:12:05,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:12:05,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:12:05,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:12:05,612 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:12:05,614 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-02-13 22:12:05,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:12:05,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:12:05,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 170 conjunts are in the unsatisfiable core [2023-02-13 22:12:05,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:12:06,903 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:12:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:08,327 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:12:08,549 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 16 treesize of output 14 [2023-02-13 22:12:08,550 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:12:08,554 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 16 treesize of output 14 [2023-02-13 22:12:08,555 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:12:08,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:08,609 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491401575] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:12:08,609 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:12:08,609 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56, 56] total 111 [2023-02-13 22:12:08,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268558898] [2023-02-13 22:12:08,609 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:12:08,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2023-02-13 22:12:08,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:12:08,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2023-02-13 22:12:08,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=11882, Unknown=0, NotChecked=0, Total=12210 [2023-02-13 22:12:08,611 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:10,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:12:10,714 INFO L93 Difference]: Finished difference Result 117 states and 118 transitions. [2023-02-13 22:12:10,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-02-13 22:12:10,714 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2023-02-13 22:12:10,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:12:10,715 INFO L225 Difference]: With dead ends: 117 [2023-02-13 22:12:10,715 INFO L226 Difference]: Without dead ends: 115 [2023-02-13 22:12:10,716 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3483 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=560, Invalid=18900, Unknown=0, NotChecked=0, Total=19460 [2023-02-13 22:12:10,717 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 41 mSDsluCounter, 2163 mSDsCounter, 0 mSdLazyCounter, 6346 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2195 SdHoareTripleChecker+Invalid, 6373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 6346 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-02-13 22:12:10,717 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2195 Invalid, 6373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 6346 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-02-13 22:12:10,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-13 22:12:10,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2023-02-13 22:12:10,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:10,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2023-02-13 22:12:10,741 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 109 [2023-02-13 22:12:10,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:12:10,741 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2023-02-13 22:12:10,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.972972972972973) internal successors, (219), 111 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2023-02-13 22:12:10,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2023-02-13 22:12:10,742 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:12:10,742 INFO L195 NwaCegarLoop]: trace histogram [27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:12:10,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-02-13 22:12:10,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:12:10,948 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:12:10,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:12:10,949 INFO L85 PathProgramCache]: Analyzing trace with hash -124139819, now seen corresponding path program 51 times [2023-02-13 22:12:10,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:12:10,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086074397] [2023-02-13 22:12:10,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:12:10,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:12:10,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:12:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 951 proven. 427 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:12,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:12:12,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086074397] [2023-02-13 22:12:12,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086074397] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:12:12,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387740707] [2023-02-13 22:12:12,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:12:12,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:12:12,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:12:12,092 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:12:12,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-02-13 22:12:20,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2023-02-13 22:12:20,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:12:20,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 56 conjunts are in the unsatisfiable core [2023-02-13 22:12:20,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:12:20,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:20,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:12:21,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 1027 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:21,466 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387740707] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:12:21,466 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:12:21,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 86 [2023-02-13 22:12:21,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460028141] [2023-02-13 22:12:21,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:12:21,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2023-02-13 22:12:21,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:12:21,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2023-02-13 22:12:21,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1685, Invalid=5625, Unknown=0, NotChecked=0, Total=7310 [2023-02-13 22:12:21,469 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:22,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:12:22,011 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2023-02-13 22:12:22,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-02-13 22:12:22,012 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2023-02-13 22:12:22,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:12:22,012 INFO L225 Difference]: With dead ends: 205 [2023-02-13 22:12:22,013 INFO L226 Difference]: Without dead ends: 120 [2023-02-13 22:12:22,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 141 SyntacticMatches, 54 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5925 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2900, Invalid=9756, Unknown=0, NotChecked=0, Total=12656 [2023-02-13 22:12:22,014 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 221 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:12:22,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 281 Invalid, 676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:12:22,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-02-13 22:12:22,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 114. [2023-02-13 22:12:22,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2023-02-13 22:12:22,039 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 112 [2023-02-13 22:12:22,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:12:22,040 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2023-02-13 22:12:22,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.302325581395349) internal successors, (198), 86 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:22,040 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2023-02-13 22:12:22,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-02-13 22:12:22,041 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:12:22,041 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:12:22,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-02-13 22:12:22,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-02-13 22:12:22,250 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:12:22,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:12:22,251 INFO L85 PathProgramCache]: Analyzing trace with hash -840117237, now seen corresponding path program 52 times [2023-02-13 22:12:22,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:12:22,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530446272] [2023-02-13 22:12:22,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:12:22,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:12:22,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:12:24,146 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:24,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:12:24,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530446272] [2023-02-13 22:12:24,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530446272] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:12:24,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910390743] [2023-02-13 22:12:24,147 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:12:24,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:12:24,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:12:24,148 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:12:24,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-02-13 22:12:25,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:12:25,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:12:25,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 558 conjuncts, 125 conjunts are in the unsatisfiable core [2023-02-13 22:12:25,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:12:25,158 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:12:26,512 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 47 treesize of output 23 [2023-02-13 22:12:26,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:26,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:12:26,799 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 16 treesize of output 14 [2023-02-13 22:12:26,800 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:12:26,804 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 16 treesize of output 14 [2023-02-13 22:12:26,805 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:12:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1405 backedges. 0 proven. 1405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:26,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910390743] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:12:26,848 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:12:26,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 59, 59] total 88 [2023-02-13 22:12:26,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681974102] [2023-02-13 22:12:26,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:12:26,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-02-13 22:12:26,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:12:26,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-02-13 22:12:26,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=7422, Unknown=0, NotChecked=0, Total=7656 [2023-02-13 22:12:26,850 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 88 states, 88 states have (on average 2.2386363636363638) internal successors, (197), 88 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:29,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:12:29,573 INFO L93 Difference]: Finished difference Result 121 states and 122 transitions. [2023-02-13 22:12:29,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-13 22:12:29,575 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.2386363636363638) internal successors, (197), 88 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 113 [2023-02-13 22:12:29,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:12:29,577 INFO L225 Difference]: With dead ends: 121 [2023-02-13 22:12:29,577 INFO L226 Difference]: Without dead ends: 119 [2023-02-13 22:12:29,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 191 SyntacticMatches, 5 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1888 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=474, Invalid=14046, Unknown=0, NotChecked=0, Total=14520 [2023-02-13 22:12:29,578 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 1734 mSDsCounter, 0 mSdLazyCounter, 5666 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 5695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 5666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-13 22:12:29,578 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 1766 Invalid, 5695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 5666 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-13 22:12:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2023-02-13 22:12:29,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2023-02-13 22:12:29,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:29,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 118 transitions. [2023-02-13 22:12:29,622 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 118 transitions. Word has length 113 [2023-02-13 22:12:29,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:12:29,622 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 118 transitions. [2023-02-13 22:12:29,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.2386363636363638) internal successors, (197), 88 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:29,622 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 118 transitions. [2023-02-13 22:12:29,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2023-02-13 22:12:29,623 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:12:29,623 INFO L195 NwaCegarLoop]: trace histogram [28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:12:29,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-02-13 22:12:29,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-02-13 22:12:29,832 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:12:29,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:12:29,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1153380206, now seen corresponding path program 53 times [2023-02-13 22:12:29,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:12:29,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319003059] [2023-02-13 22:12:29,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:12:29,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:12:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:12:30,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1028 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:30,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:12:30,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319003059] [2023-02-13 22:12:30,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319003059] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:12:30,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732418106] [2023-02-13 22:12:30,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:12:30,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:12:30,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:12:30,719 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:12:30,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-02-13 22:12:32,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2023-02-13 22:12:32,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:12:32,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 58 conjunts are in the unsatisfiable core [2023-02-13 22:12:32,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:12:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:33,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:12:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 1107 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:34,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732418106] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:12:34,083 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:12:34,083 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 89 [2023-02-13 22:12:34,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577651136] [2023-02-13 22:12:34,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:12:34,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-02-13 22:12:34,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:12:34,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-02-13 22:12:34,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1803, Invalid=6029, Unknown=0, NotChecked=0, Total=7832 [2023-02-13 22:12:34,084 INFO L87 Difference]: Start difference. First operand 117 states and 118 transitions. Second operand has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:12:34,671 INFO L93 Difference]: Finished difference Result 212 states and 214 transitions. [2023-02-13 22:12:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-02-13 22:12:34,671 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 116 [2023-02-13 22:12:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:12:34,672 INFO L225 Difference]: With dead ends: 212 [2023-02-13 22:12:34,672 INFO L226 Difference]: Without dead ends: 124 [2023-02-13 22:12:34,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 146 SyntacticMatches, 56 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6355 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3105, Invalid=10467, Unknown=0, NotChecked=0, Total=13572 [2023-02-13 22:12:34,674 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 311 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:12:34,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 258 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:12:34,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-02-13 22:12:34,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 118. [2023-02-13 22:12:34,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:34,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2023-02-13 22:12:34,700 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 116 [2023-02-13 22:12:34,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:12:34,701 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2023-02-13 22:12:34,701 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.303370786516854) internal successors, (205), 89 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:34,701 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2023-02-13 22:12:34,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-02-13 22:12:34,701 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:12:34,701 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:12:34,710 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2023-02-13 22:12:34,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:12:34,910 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:12:34,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:12:34,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1765692104, now seen corresponding path program 54 times [2023-02-13 22:12:34,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:12:34,911 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134227851] [2023-02-13 22:12:34,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:12:34,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:12:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:12:36,953 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:36,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:12:36,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134227851] [2023-02-13 22:12:36,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134227851] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:12:36,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727313850] [2023-02-13 22:12:36,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:12:36,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:12:36,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:12:36,955 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:12:36,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-02-13 22:12:43,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2023-02-13 22:12:43,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:12:43,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 124 conjunts are in the unsatisfiable core [2023-02-13 22:12:43,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:12:43,115 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:12:44,383 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 47 treesize of output 23 [2023-02-13 22:12:44,418 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:44,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:12:44,638 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 16 treesize of output 14 [2023-02-13 22:12:44,639 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:12:44,642 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 16 treesize of output 14 [2023-02-13 22:12:44,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:12:44,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1513 backedges. 0 proven. 1513 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:44,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727313850] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:12:44,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:12:44,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60, 60] total 89 [2023-02-13 22:12:44,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304906128] [2023-02-13 22:12:44,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:12:44,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-02-13 22:12:44,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:12:44,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-02-13 22:12:44,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=7600, Unknown=0, NotChecked=0, Total=7832 [2023-02-13 22:12:44,706 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 89 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:12:47,315 INFO L93 Difference]: Finished difference Result 125 states and 126 transitions. [2023-02-13 22:12:47,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-02-13 22:12:47,315 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 89 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-02-13 22:12:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:12:47,316 INFO L225 Difference]: With dead ends: 125 [2023-02-13 22:12:47,316 INFO L226 Difference]: Without dead ends: 123 [2023-02-13 22:12:47,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 200 SyntacticMatches, 5 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1740 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=448, Invalid=13832, Unknown=0, NotChecked=0, Total=14280 [2023-02-13 22:12:47,317 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 41 mSDsluCounter, 2030 mSDsCounter, 0 mSdLazyCounter, 6259 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 2064 SdHoareTripleChecker+Invalid, 6288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 6259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-02-13 22:12:47,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 2064 Invalid, 6288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 6259 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-02-13 22:12:47,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-02-13 22:12:47,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2023-02-13 22:12:47,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0166666666666666) internal successors, (122), 120 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:47,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2023-02-13 22:12:47,345 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 117 [2023-02-13 22:12:47,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:12:47,346 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2023-02-13 22:12:47,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.269662921348315) internal successors, (202), 89 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:47,346 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2023-02-13 22:12:47,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2023-02-13 22:12:47,346 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:12:47,347 INFO L195 NwaCegarLoop]: trace histogram [29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:12:47,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2023-02-13 22:12:47,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:12:47,556 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:12:47,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:12:47,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1273789621, now seen corresponding path program 55 times [2023-02-13 22:12:47,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:12:47,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820651773] [2023-02-13 22:12:47,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:12:47,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:12:47,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:12:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1108 proven. 488 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:48,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:12:48,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820651773] [2023-02-13 22:12:48,530 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820651773] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:12:48,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550447236] [2023-02-13 22:12:48,530 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:12:48,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:12:48,530 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:12:48,531 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:12:48,532 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-02-13 22:12:48,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:12:48,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 60 conjunts are in the unsatisfiable core [2023-02-13 22:12:48,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:12:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:49,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:12:50,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 1190 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:50,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550447236] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:12:50,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:12:50,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 92 [2023-02-13 22:12:50,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783033196] [2023-02-13 22:12:50,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:12:50,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2023-02-13 22:12:50,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:12:50,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2023-02-13 22:12:50,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1925, Invalid=6447, Unknown=0, NotChecked=0, Total=8372 [2023-02-13 22:12:50,282 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:50,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:12:50,768 INFO L93 Difference]: Finished difference Result 219 states and 221 transitions. [2023-02-13 22:12:50,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-02-13 22:12:50,769 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 120 [2023-02-13 22:12:50,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:12:50,770 INFO L225 Difference]: With dead ends: 219 [2023-02-13 22:12:50,770 INFO L226 Difference]: Without dead ends: 128 [2023-02-13 22:12:50,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 151 SyntacticMatches, 58 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6800 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3317, Invalid=11203, Unknown=0, NotChecked=0, Total=14520 [2023-02-13 22:12:50,771 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 411 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 411 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:12:50,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [411 Valid, 244 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:12:50,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2023-02-13 22:12:50,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 122. [2023-02-13 22:12:50,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:50,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2023-02-13 22:12:50,799 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 120 [2023-02-13 22:12:50,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:12:50,799 INFO L495 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2023-02-13 22:12:50,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.3043478260869565) internal successors, (212), 92 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:12:50,799 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2023-02-13 22:12:50,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-02-13 22:12:50,800 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:12:50,800 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:12:50,817 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2023-02-13 22:12:51,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:12:51,006 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:12:51,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:12:51,006 INFO L85 PathProgramCache]: Analyzing trace with hash -565054485, now seen corresponding path program 56 times [2023-02-13 22:12:51,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:12:51,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305713850] [2023-02-13 22:12:51,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:12:51,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:12:51,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:12:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:53,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:12:53,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305713850] [2023-02-13 22:12:53,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305713850] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:12:53,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499348150] [2023-02-13 22:12:53,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:12:53,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:12:53,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:12:53,300 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:12:53,301 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-02-13 22:12:53,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:12:53,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:12:53,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 130 conjunts are in the unsatisfiable core [2023-02-13 22:12:53,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:12:54,985 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:12:57,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:57,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:12:57,439 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 16 treesize of output 14 [2023-02-13 22:12:57,440 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:12:57,444 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 16 treesize of output 14 [2023-02-13 22:12:57,446 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:12:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 1625 backedges. 0 proven. 1625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:12:57,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1499348150] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:12:57,521 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:12:57,521 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 123 [2023-02-13 22:12:57,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516577828] [2023-02-13 22:12:57,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:12:57,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2023-02-13 22:12:57,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:12:57,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2023-02-13 22:12:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=14642, Unknown=0, NotChecked=0, Total=15006 [2023-02-13 22:12:57,523 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 123 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:00,916 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2023-02-13 22:13:00,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-02-13 22:13:00,916 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2023-02-13 22:13:00,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:00,917 INFO L225 Difference]: With dead ends: 129 [2023-02-13 22:13:00,917 INFO L226 Difference]: Without dead ends: 127 [2023-02-13 22:13:00,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4275 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=620, Invalid=23250, Unknown=0, NotChecked=0, Total=23870 [2023-02-13 22:13:00,918 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 40 mSDsluCounter, 2701 mSDsCounter, 0 mSdLazyCounter, 8242 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 2736 SdHoareTripleChecker+Invalid, 8272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 8242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:00,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 2736 Invalid, 8272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 8242 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-02-13 22:13:00,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-02-13 22:13:00,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2023-02-13 22:13:00,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:00,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 126 transitions. [2023-02-13 22:13:00,948 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 126 transitions. Word has length 121 [2023-02-13 22:13:00,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:00,948 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 126 transitions. [2023-02-13 22:13:00,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.975609756097561) internal successors, (243), 123 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:00,948 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 126 transitions. [2023-02-13 22:13:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-02-13 22:13:00,949 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:00,949 INFO L195 NwaCegarLoop]: trace histogram [30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:00,954 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2023-02-13 22:13:01,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-02-13 22:13:01,154 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:01,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:01,155 INFO L85 PathProgramCache]: Analyzing trace with hash -1556536142, now seen corresponding path program 57 times [2023-02-13 22:13:01,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:01,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326918631] [2023-02-13 22:13:01,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:01,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:02,346 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1191 proven. 520 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:02,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:02,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326918631] [2023-02-13 22:13:02,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326918631] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:13:02,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266027006] [2023-02-13 22:13:02,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:13:02,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:02,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:02,348 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:13:02,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-02-13 22:13:15,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2023-02-13 22:13:15,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:13:15,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 62 conjunts are in the unsatisfiable core [2023-02-13 22:13:15,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:16,435 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:13:17,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 1276 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:17,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266027006] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:13:17,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:13:17,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 95 [2023-02-13 22:13:17,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351004608] [2023-02-13 22:13:17,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:13:17,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2023-02-13 22:13:17,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:17,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2023-02-13 22:13:17,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2051, Invalid=6879, Unknown=0, NotChecked=0, Total=8930 [2023-02-13 22:13:17,059 INFO L87 Difference]: Start difference. First operand 125 states and 126 transitions. Second operand has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:17,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:17,487 INFO L93 Difference]: Finished difference Result 226 states and 228 transitions. [2023-02-13 22:13:17,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-02-13 22:13:17,487 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2023-02-13 22:13:17,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:17,488 INFO L225 Difference]: With dead ends: 226 [2023-02-13 22:13:17,488 INFO L226 Difference]: Without dead ends: 132 [2023-02-13 22:13:17,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 339 GetRequests, 156 SyntacticMatches, 60 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7260 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3536, Invalid=11964, Unknown=0, NotChecked=0, Total=15500 [2023-02-13 22:13:17,490 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 399 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:17,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [399 Valid, 272 Invalid, 767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 22:13:17,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-02-13 22:13:17,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 126. [2023-02-13 22:13:17,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:17,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2023-02-13 22:13:17,534 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 124 [2023-02-13 22:13:17,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:17,534 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2023-02-13 22:13:17,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:17,534 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2023-02-13 22:13:17,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-02-13 22:13:17,535 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:17,535 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:17,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-02-13 22:13:17,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-02-13 22:13:17,745 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:17,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:17,746 INFO L85 PathProgramCache]: Analyzing trace with hash 184815848, now seen corresponding path program 58 times [2023-02-13 22:13:17,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:17,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6702368] [2023-02-13 22:13:17,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:17,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:20,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:20,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6702368] [2023-02-13 22:13:20,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6702368] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:13:20,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816518950] [2023-02-13 22:13:20,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 22:13:20,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:20,231 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:20,232 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:13:20,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-02-13 22:13:23,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 22:13:23,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:13:23,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 137 conjunts are in the unsatisfiable core [2023-02-13 22:13:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:24,010 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:13:26,151 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 47 treesize of output 23 [2023-02-13 22:13:26,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:26,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:13:26,621 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 16 treesize of output 14 [2023-02-13 22:13:26,623 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:13:26,626 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 16 treesize of output 14 [2023-02-13 22:13:26,627 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:13:26,704 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 0 proven. 1741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:26,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816518950] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:13:26,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:13:26,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 65, 65] total 97 [2023-02-13 22:13:26,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680583539] [2023-02-13 22:13:26,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:13:26,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2023-02-13 22:13:26,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:26,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2023-02-13 22:13:26,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=9054, Unknown=0, NotChecked=0, Total=9312 [2023-02-13 22:13:26,705 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 97 states, 97 states have (on average 2.247422680412371) internal successors, (218), 97 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:30,522 INFO L93 Difference]: Finished difference Result 133 states and 134 transitions. [2023-02-13 22:13:30,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-13 22:13:30,522 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.247422680412371) internal successors, (218), 97 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2023-02-13 22:13:30,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:30,523 INFO L225 Difference]: With dead ends: 133 [2023-02-13 22:13:30,523 INFO L226 Difference]: Without dead ends: 131 [2023-02-13 22:13:30,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 212 SyntacticMatches, 5 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=519, Invalid=17037, Unknown=0, NotChecked=0, Total=17556 [2023-02-13 22:13:30,525 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 2449 mSDsCounter, 0 mSdLazyCounter, 7953 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 2484 SdHoareTripleChecker+Invalid, 7986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 7953 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:30,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 2484 Invalid, 7986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 7953 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-13 22:13:30,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-02-13 22:13:30,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2023-02-13 22:13:30,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:30,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 130 transitions. [2023-02-13 22:13:30,557 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 130 transitions. Word has length 125 [2023-02-13 22:13:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:30,557 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 130 transitions. [2023-02-13 22:13:30,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.247422680412371) internal successors, (218), 97 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:30,557 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 130 transitions. [2023-02-13 22:13:30,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2023-02-13 22:13:30,558 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:30,558 INFO L195 NwaCegarLoop]: trace histogram [31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:30,568 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2023-02-13 22:13:30,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:30,768 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:30,769 INFO L85 PathProgramCache]: Analyzing trace with hash -294352235, now seen corresponding path program 59 times [2023-02-13 22:13:30,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:30,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749366530] [2023-02-13 22:13:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:30,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:32,244 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1277 proven. 553 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:32,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:32,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749366530] [2023-02-13 22:13:32,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749366530] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:13:32,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585644568] [2023-02-13 22:13:32,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 22:13:32,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:32,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:32,245 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:13:32,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-02-13 22:13:33,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2023-02-13 22:13:33,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:13:33,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 64 conjunts are in the unsatisfiable core [2023-02-13 22:13:33,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:35,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:13:36,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 1365 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:36,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585644568] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:13:36,374 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:13:36,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 98 [2023-02-13 22:13:36,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863121293] [2023-02-13 22:13:36,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:13:36,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-02-13 22:13:36,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:36,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-02-13 22:13:36,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2181, Invalid=7325, Unknown=0, NotChecked=0, Total=9506 [2023-02-13 22:13:36,376 INFO L87 Difference]: Start difference. First operand 129 states and 130 transitions. Second operand has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:37,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:37,153 INFO L93 Difference]: Finished difference Result 233 states and 235 transitions. [2023-02-13 22:13:37,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-02-13 22:13:37,155 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 128 [2023-02-13 22:13:37,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:37,156 INFO L225 Difference]: With dead ends: 233 [2023-02-13 22:13:37,156 INFO L226 Difference]: Without dead ends: 136 [2023-02-13 22:13:37,157 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 161 SyntacticMatches, 62 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7735 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3762, Invalid=12750, Unknown=0, NotChecked=0, Total=16512 [2023-02-13 22:13:37,157 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 381 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:37,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 332 Invalid, 875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 22:13:37,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2023-02-13 22:13:37,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 130. [2023-02-13 22:13:37,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0155038759689923) internal successors, (131), 129 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:37,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2023-02-13 22:13:37,198 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 128 [2023-02-13 22:13:37,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:37,198 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2023-02-13 22:13:37,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.306122448979592) internal successors, (226), 98 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2023-02-13 22:13:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-02-13 22:13:37,199 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:37,199 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:37,208 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2023-02-13 22:13:37,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:37,408 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:37,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:37,409 INFO L85 PathProgramCache]: Analyzing trace with hash 1642228683, now seen corresponding path program 60 times [2023-02-13 22:13:37,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:37,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048651186] [2023-02-13 22:13:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:37,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:37,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:39,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:39,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048651186] [2023-02-13 22:13:39,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048651186] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:13:39,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136052109] [2023-02-13 22:13:39,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 22:13:39,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:39,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:39,629 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:13:39,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-02-13 22:13:50,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2023-02-13 22:13:50,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:13:50,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 634 conjuncts, 136 conjunts are in the unsatisfiable core [2023-02-13 22:13:50,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:50,831 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-02-13 22:13:52,539 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 47 treesize of output 23 [2023-02-13 22:13:52,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:52,581 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:13:52,841 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 16 treesize of output 14 [2023-02-13 22:13:52,843 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:13:52,845 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 16 treesize of output 14 [2023-02-13 22:13:52,846 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:13:52,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1861 backedges. 0 proven. 1861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:52,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136052109] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:13:52,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:13:52,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66, 66] total 98 [2023-02-13 22:13:52,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445255950] [2023-02-13 22:13:52,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:13:52,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-02-13 22:13:52,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:52,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-02-13 22:13:52,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=9250, Unknown=0, NotChecked=0, Total=9506 [2023-02-13 22:13:52,925 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 98 states, 98 states have (on average 2.2755102040816326) internal successors, (223), 98 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:55,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:13:55,646 INFO L93 Difference]: Finished difference Result 137 states and 138 transitions. [2023-02-13 22:13:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-02-13 22:13:55,646 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.2755102040816326) internal successors, (223), 98 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2023-02-13 22:13:55,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:13:55,647 INFO L225 Difference]: With dead ends: 137 [2023-02-13 22:13:55,647 INFO L226 Difference]: Without dead ends: 135 [2023-02-13 22:13:55,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 221 SyntacticMatches, 5 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=493, Invalid=16799, Unknown=0, NotChecked=0, Total=17292 [2023-02-13 22:13:55,648 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 42 mSDsluCounter, 2556 mSDsCounter, 0 mSdLazyCounter, 7909 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 2593 SdHoareTripleChecker+Invalid, 7941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 7909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-02-13 22:13:55,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 2593 Invalid, 7941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 7909 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-02-13 22:13:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-02-13 22:13:55,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2023-02-13 22:13:55,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0151515151515151) internal successors, (134), 132 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:55,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2023-02-13 22:13:55,681 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 129 [2023-02-13 22:13:55,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:13:55,682 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2023-02-13 22:13:55,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.2755102040816326) internal successors, (223), 98 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:13:55,682 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2023-02-13 22:13:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-02-13 22:13:55,682 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:13:55,682 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:13:55,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-02-13 22:13:55,893 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:55,893 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:13:55,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:13:55,893 INFO L85 PathProgramCache]: Analyzing trace with hash -332980014, now seen corresponding path program 61 times [2023-02-13 22:13:55,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:13:55,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806213190] [2023-02-13 22:13:55,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:13:55,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:13:55,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:57,092 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1366 proven. 587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:57,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:13:57,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806213190] [2023-02-13 22:13:57,093 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806213190] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:13:57,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143690387] [2023-02-13 22:13:57,093 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 22:13:57,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:13:57,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:13:57,095 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:13:57,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-02-13 22:13:57,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:13:57,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 644 conjuncts, 66 conjunts are in the unsatisfiable core [2023-02-13 22:13:57,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:13:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:58,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:13:59,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 1457 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:13:59,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143690387] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:13:59,813 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:13:59,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 101 [2023-02-13 22:13:59,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799592322] [2023-02-13 22:13:59,814 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:13:59,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-02-13 22:13:59,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:13:59,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-02-13 22:13:59,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2315, Invalid=7785, Unknown=0, NotChecked=0, Total=10100 [2023-02-13 22:13:59,815 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 101 states, 101 states have (on average 2.3069306930693068) internal successors, (233), 101 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:14:00,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:14:00,363 INFO L93 Difference]: Finished difference Result 240 states and 242 transitions. [2023-02-13 22:14:00,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-02-13 22:14:00,363 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.3069306930693068) internal successors, (233), 101 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-02-13 22:14:00,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:14:00,364 INFO L225 Difference]: With dead ends: 240 [2023-02-13 22:14:00,364 INFO L226 Difference]: Without dead ends: 140 [2023-02-13 22:14:00,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 166 SyntacticMatches, 64 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8225 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=3995, Invalid=13561, Unknown=0, NotChecked=0, Total=17556 [2023-02-13 22:14:00,365 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 459 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 883 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 22:14:00,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [459 Valid, 321 Invalid, 883 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 22:14:00,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-02-13 22:14:00,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 134. [2023-02-13 22:14:00,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.0150375939849625) internal successors, (135), 133 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:14:00,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2023-02-13 22:14:00,399 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 132 [2023-02-13 22:14:00,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:14:00,399 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2023-02-13 22:14:00,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.3069306930693068) internal successors, (233), 101 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:14:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2023-02-13 22:14:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-02-13 22:14:00,400 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:14:00,400 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:14:00,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-02-13 22:14:00,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:14:00,606 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:14:00,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:14:00,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1186297608, now seen corresponding path program 62 times [2023-02-13 22:14:00,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:14:00,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348543646] [2023-02-13 22:14:00,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:14:00,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:14:00,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:14:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:14:03,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:14:03,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348543646] [2023-02-13 22:14:03,171 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348543646] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:14:03,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753499845] [2023-02-13 22:14:03,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 22:14:03,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:14:03,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:14:03,174 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:14:03,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-02-13 22:14:03,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 22:14:03,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 22:14:03,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 206 conjunts are in the unsatisfiable core [2023-02-13 22:14:03,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 22:14:05,369 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-02-13 22:14:08,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:14:08,196 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 22:14:08,584 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 16 treesize of output 14 [2023-02-13 22:14:08,585 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:14:08,588 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 16 treesize of output 14 [2023-02-13 22:14:08,590 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 24 treesize of output 20 [2023-02-13 22:14:08,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1985 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:14:08,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753499845] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 22:14:08,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 22:14:08,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68, 68] total 135 [2023-02-13 22:14:08,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773308497] [2023-02-13 22:14:08,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 22:14:08,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2023-02-13 22:14:08,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 22:14:08,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2023-02-13 22:14:08,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=400, Invalid=17690, Unknown=0, NotChecked=0, Total=18090 [2023-02-13 22:14:08,694 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 135 states, 135 states have (on average 1.9777777777777779) internal successors, (267), 135 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:14:12,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 22:14:12,312 INFO L93 Difference]: Finished difference Result 141 states and 142 transitions. [2023-02-13 22:14:12,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-02-13 22:14:12,313 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.9777777777777779) internal successors, (267), 135 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2023-02-13 22:14:12,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 22:14:12,313 INFO L225 Difference]: With dead ends: 141 [2023-02-13 22:14:12,314 INFO L226 Difference]: Without dead ends: 139 [2023-02-13 22:14:12,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 196 SyntacticMatches, 3 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5148 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=680, Invalid=28050, Unknown=0, NotChecked=0, Total=28730 [2023-02-13 22:14:12,315 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 47 mSDsluCounter, 3371 mSDsCounter, 0 mSdLazyCounter, 9952 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 3409 SdHoareTripleChecker+Invalid, 9985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 9952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-02-13 22:14:12,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 3409 Invalid, 9985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 9952 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-02-13 22:14:12,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-02-13 22:14:12,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2023-02-13 22:14:12,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:14:12,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 138 transitions. [2023-02-13 22:14:12,358 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 138 transitions. Word has length 133 [2023-02-13 22:14:12,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 22:14:12,358 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 138 transitions. [2023-02-13 22:14:12,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.9777777777777779) internal successors, (267), 135 states have internal predecessors, (267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 22:14:12,358 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 138 transitions. [2023-02-13 22:14:12,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-02-13 22:14:12,359 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 22:14:12,359 INFO L195 NwaCegarLoop]: trace histogram [33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 22:14:12,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2023-02-13 22:14:12,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2023-02-13 22:14:12,566 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 22:14:12,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 22:14:12,566 INFO L85 PathProgramCache]: Analyzing trace with hash 2005921909, now seen corresponding path program 63 times [2023-02-13 22:14:12,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 22:14:12,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840474728] [2023-02-13 22:14:12,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 22:14:12,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 22:14:12,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 22:14:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 1458 proven. 622 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 22:14:13,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 22:14:13,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840474728] [2023-02-13 22:14:13,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840474728] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 22:14:13,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098757233] [2023-02-13 22:14:13,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 22:14:13,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 22:14:13,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 22:14:13,746 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 22:14:13,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process