./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/Ackermann03.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e8d55036 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/recursive/Ackermann03.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd --- Real Ultimate output --- This is Ultimate 0.2.2-?-e8d5503-m [2023-02-15 21:35:16,010 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-15 21:35:16,011 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-15 21:35:16,040 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-15 21:35:16,041 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-15 21:35:16,042 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-15 21:35:16,043 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-15 21:35:16,045 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-15 21:35:16,046 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-15 21:35:16,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-15 21:35:16,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-15 21:35:16,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-15 21:35:16,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-15 21:35:16,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-15 21:35:16,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-15 21:35:16,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-15 21:35:16,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-15 21:35:16,053 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-15 21:35:16,055 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-15 21:35:16,058 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-15 21:35:16,060 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-15 21:35:16,065 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-15 21:35:16,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-15 21:35:16,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-15 21:35:16,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-15 21:35:16,079 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-15 21:35:16,079 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-15 21:35:16,080 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-15 21:35:16,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-15 21:35:16,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-15 21:35:16,081 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-15 21:35:16,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-15 21:35:16,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-15 21:35:16,084 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-15 21:35:16,089 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-15 21:35:16,090 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-15 21:35:16,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-15 21:35:16,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-15 21:35:16,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-15 21:35:16,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-15 21:35:16,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-15 21:35:16,098 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-15 21:35:16,121 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-15 21:35:16,121 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-15 21:35:16,122 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-15 21:35:16,122 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-15 21:35:16,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-15 21:35:16,123 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-15 21:35:16,124 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-15 21:35:16,124 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-15 21:35:16,124 INFO L138 SettingsManager]: * Use SBE=true [2023-02-15 21:35:16,125 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-15 21:35:16,125 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-15 21:35:16,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-15 21:35:16,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-15 21:35:16,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-15 21:35:16,126 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-15 21:35:16,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-15 21:35:16,126 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-15 21:35:16,126 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-15 21:35:16,127 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-15 21:35:16,127 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-15 21:35:16,127 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-15 21:35:16,127 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-15 21:35:16,127 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-15 21:35:16,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-15 21:35:16,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:35:16,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-15 21:35:16,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-15 21:35:16,128 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-15 21:35:16,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-15 21:35:16,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-15 21:35:16,129 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-15 21:35:16,129 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-15 21:35:16,129 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-15 21:35:16,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-15 21:35:16,130 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-15 21:35:16,130 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c244f72db2906c596b7f122d769fc1464836d7d05d9227ee4269773d59ed10bd [2023-02-15 21:35:16,349 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-15 21:35:16,377 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-15 21:35:16,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-15 21:35:16,381 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-15 21:35:16,381 INFO L275 PluginConnector]: CDTParser initialized [2023-02-15 21:35:16,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/Ackermann03.c [2023-02-15 21:35:17,561 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-15 21:35:17,746 INFO L351 CDTParser]: Found 1 translation units. [2023-02-15 21:35:17,746 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/Ackermann03.c [2023-02-15 21:35:17,750 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd4ba546/66e56e76dee64407a5588c016011d555/FLAGae808ef5e [2023-02-15 21:35:17,760 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cd4ba546/66e56e76dee64407a5588c016011d555 [2023-02-15 21:35:17,762 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-15 21:35:17,763 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-15 21:35:17,764 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-15 21:35:17,764 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-15 21:35:17,766 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-15 21:35:17,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:35:17" (1/1) ... [2023-02-15 21:35:17,767 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@29bb3f2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17, skipping insertion in model container [2023-02-15 21:35:17,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 09:35:17" (1/1) ... [2023-02-15 21:35:17,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-15 21:35:17,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-15 21:35:17,903 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/recursive/Ackermann03.c[1168,1181] [2023-02-15 21:35:17,907 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:35:17,914 INFO L203 MainTranslator]: Completed pre-run [2023-02-15 21:35:17,925 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/recursive/Ackermann03.c[1168,1181] [2023-02-15 21:35:17,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-15 21:35:17,935 INFO L208 MainTranslator]: Completed translation [2023-02-15 21:35:17,936 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17 WrapperNode [2023-02-15 21:35:17,936 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-15 21:35:17,937 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-15 21:35:17,937 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-15 21:35:17,937 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-15 21:35:17,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17" (1/1) ... [2023-02-15 21:35:17,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17" (1/1) ... [2023-02-15 21:35:17,962 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2023-02-15 21:35:17,962 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-15 21:35:17,962 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-15 21:35:17,962 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-15 21:35:17,963 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-15 21:35:17,968 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17" (1/1) ... [2023-02-15 21:35:17,968 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17" (1/1) ... [2023-02-15 21:35:17,969 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17" (1/1) ... [2023-02-15 21:35:17,969 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17" (1/1) ... [2023-02-15 21:35:17,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17" (1/1) ... [2023-02-15 21:35:17,973 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17" (1/1) ... [2023-02-15 21:35:17,974 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17" (1/1) ... [2023-02-15 21:35:17,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17" (1/1) ... [2023-02-15 21:35:17,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-15 21:35:17,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-15 21:35:17,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-15 21:35:17,977 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-15 21:35:17,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17" (1/1) ... [2023-02-15 21:35:17,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-15 21:35:17,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:18,010 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) [2023-02-15 21:35:18,013 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 [2023-02-15 21:35:18,043 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-15 21:35:18,043 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-15 21:35:18,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-15 21:35:18,044 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-02-15 21:35:18,044 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-02-15 21:35:18,047 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-15 21:35:18,104 INFO L235 CfgBuilder]: Building ICFG [2023-02-15 21:35:18,106 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-15 21:35:18,265 INFO L276 CfgBuilder]: Performing block encoding [2023-02-15 21:35:18,271 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-15 21:35:18,271 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2023-02-15 21:35:18,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:35:18 BoogieIcfgContainer [2023-02-15 21:35:18,273 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-15 21:35:18,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-15 21:35:18,275 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-15 21:35:18,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-15 21:35:18,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 09:35:17" (1/3) ... [2023-02-15 21:35:18,278 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339f8f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:35:18, skipping insertion in model container [2023-02-15 21:35:18,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 09:35:17" (2/3) ... [2023-02-15 21:35:18,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@339f8f9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 09:35:18, skipping insertion in model container [2023-02-15 21:35:18,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:35:18" (3/3) ... [2023-02-15 21:35:18,280 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann03.c [2023-02-15 21:35:18,296 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-15 21:35:18,296 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-15 21:35:18,346 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-15 21:35:18,353 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;@8907c8e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-15 21:35:18,366 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-15 21:35:18,370 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-02-15 21:35:18,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-02-15 21:35:18,376 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:18,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:18,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:18,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:18,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2023-02-15 21:35:18,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:18,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607676885] [2023-02-15 21:35:18,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:18,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:18,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:18,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:35:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-15 21:35:18,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:18,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607676885] [2023-02-15 21:35:18,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607676885] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-15 21:35:18,650 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-15 21:35:18,651 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-02-15 21:35:18,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376255724] [2023-02-15 21:35:18,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-15 21:35:18,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-02-15 21:35:18,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:18,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-02-15 21:35:18,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-02-15 21:35:18,686 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:35:18,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:18,819 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2023-02-15 21:35:18,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-02-15 21:35:18,822 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2023-02-15 21:35:18,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:18,832 INFO L225 Difference]: With dead ends: 51 [2023-02-15 21:35:18,833 INFO L226 Difference]: Without dead ends: 25 [2023-02-15 21:35:18,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-02-15 21:35:18,843 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 15 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:18,844 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 72 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:18,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-02-15 21:35:18,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-02-15 21:35:18,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 21:35:18,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2023-02-15 21:35:18,884 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 12 [2023-02-15 21:35:18,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:18,885 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2023-02-15 21:35:18,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-02-15 21:35:18,886 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-02-15 21:35:18,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-02-15 21:35:18,890 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:18,890 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:18,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-15 21:35:18,891 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:18,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:18,892 INFO L85 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2023-02-15 21:35:18,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:18,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027400282] [2023-02-15 21:35:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:18,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:18,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:35:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:19,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:19,054 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:35:19,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027400282] [2023-02-15 21:35:19,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027400282] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120038134] [2023-02-15 21:35:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:19,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:19,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:19,060 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) [2023-02-15 21:35:19,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-15 21:35:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:19,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2023-02-15 21:35:19,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:19,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:35:19,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:19,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-15 21:35:19,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120038134] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:19,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:19,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-02-15 21:35:19,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579065454] [2023-02-15 21:35:19,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:19,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-02-15 21:35:19,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:19,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-02-15 21:35:19,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-02-15 21:35:19,333 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 21:35:19,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:19,478 INFO L93 Difference]: Finished difference Result 74 states and 126 transitions. [2023-02-15 21:35:19,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-02-15 21:35:19,479 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 19 [2023-02-15 21:35:19,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:19,481 INFO L225 Difference]: With dead ends: 74 [2023-02-15 21:35:19,482 INFO L226 Difference]: Without dead ends: 50 [2023-02-15 21:35:19,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-02-15 21:35:19,484 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 21 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:19,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 91 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:19,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-15 21:35:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-15 21:35:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 34 states have internal predecessors, (39), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) [2023-02-15 21:35:19,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 76 transitions. [2023-02-15 21:35:19,498 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 76 transitions. Word has length 19 [2023-02-15 21:35:19,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:19,499 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 76 transitions. [2023-02-15 21:35:19,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-02-15 21:35:19,499 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 76 transitions. [2023-02-15 21:35:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-02-15 21:35:19,502 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:19,502 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:19,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:19,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:19,709 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:19,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:19,710 INFO L85 PathProgramCache]: Analyzing trace with hash -574784801, now seen corresponding path program 1 times [2023-02-15 21:35:19,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:19,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672653353] [2023-02-15 21:35:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:19,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:19,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:35:19,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:20,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:20,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:20,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:20,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:20,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:20,202 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 21:35:20,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:20,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672653353] [2023-02-15 21:35:20,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672653353] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:20,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954279124] [2023-02-15 21:35:20,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:20,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:20,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:20,212 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) [2023-02-15 21:35:20,219 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-15 21:35:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:20,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 21:35:20,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-02-15 21:35:20,396 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:20,897 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-02-15 21:35:20,897 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954279124] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:20,897 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:20,897 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2023-02-15 21:35:20,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36137941] [2023-02-15 21:35:20,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:20,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-02-15 21:35:20,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:20,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-02-15 21:35:20,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-02-15 21:35:20,899 INFO L87 Difference]: Start difference. First operand 50 states and 76 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 21:35:21,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:21,012 INFO L93 Difference]: Finished difference Result 120 states and 227 transitions. [2023-02-15 21:35:21,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-02-15 21:35:21,013 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) Word has length 45 [2023-02-15 21:35:21,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:21,021 INFO L225 Difference]: With dead ends: 120 [2023-02-15 21:35:21,021 INFO L226 Difference]: Without dead ends: 53 [2023-02-15 21:35:21,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 96 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-02-15 21:35:21,029 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 47 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:21,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 81 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:35:21,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-02-15 21:35:21,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2023-02-15 21:35:21,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 37 states have internal predecessors, (40), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (28), 11 states have call predecessors, (28), 8 states have call successors, (28) [2023-02-15 21:35:21,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2023-02-15 21:35:21,053 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 45 [2023-02-15 21:35:21,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:21,054 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2023-02-15 21:35:21,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2023-02-15 21:35:21,055 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2023-02-15 21:35:21,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-02-15 21:35:21,061 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:21,062 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:21,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-02-15 21:35:21,267 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,SelfDestructingSolverStorable2 [2023-02-15 21:35:21,268 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:21,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:21,268 INFO L85 PathProgramCache]: Analyzing trace with hash 2049356910, now seen corresponding path program 2 times [2023-02-15 21:35:21,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:21,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914007543] [2023-02-15 21:35:21,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:21,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:21,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:21,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:35:21,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:21,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:21,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:21,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:21,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:21,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:21,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:21,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:21,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:21,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:21,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:35:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:21,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:21,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:21,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:21,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:22,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:22,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:22,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:22,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-02-15 21:35:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:22,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:22,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:22,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:22,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:22,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:22,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:22,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 127 proven. 266 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-02-15 21:35:22,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:22,053 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914007543] [2023-02-15 21:35:22,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914007543] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:22,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596048884] [2023-02-15 21:35:22,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:35:22,054 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:22,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:22,055 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) [2023-02-15 21:35:22,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-15 21:35:22,159 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:35:22,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:22,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 17 conjunts are in the unsatisfiable core [2023-02-15 21:35:22,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:22,323 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 360 proven. 86 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-02-15 21:35:22,324 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:23,710 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 115 proven. 179 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2023-02-15 21:35:23,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596048884] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:23,711 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:23,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 15] total 33 [2023-02-15 21:35:23,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005085863] [2023-02-15 21:35:23,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:23,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-02-15 21:35:23,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:23,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-02-15 21:35:23,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2023-02-15 21:35:23,714 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 27 states have internal predecessors, (77), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (33), 19 states have call predecessors, (33), 11 states have call successors, (33) [2023-02-15 21:35:24,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:24,586 INFO L93 Difference]: Finished difference Result 126 states and 253 transitions. [2023-02-15 21:35:24,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 21:35:24,587 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 27 states have internal predecessors, (77), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (33), 19 states have call predecessors, (33), 11 states have call successors, (33) Word has length 119 [2023-02-15 21:35:24,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:24,589 INFO L225 Difference]: With dead ends: 126 [2023-02-15 21:35:24,589 INFO L226 Difference]: Without dead ends: 78 [2023-02-15 21:35:24,591 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 249 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=587, Invalid=2835, Unknown=0, NotChecked=0, Total=3422 [2023-02-15 21:35:24,592 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 68 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 700 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:24,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 178 Invalid, 700 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:35:24,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2023-02-15 21:35:24,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2023-02-15 21:35:24,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 13 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (46), 16 states have call predecessors, (46), 13 states have call successors, (46) [2023-02-15 21:35:24,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 117 transitions. [2023-02-15 21:35:24,606 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 117 transitions. Word has length 119 [2023-02-15 21:35:24,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:24,606 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 117 transitions. [2023-02-15 21:35:24,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 27 states have internal predecessors, (77), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (33), 19 states have call predecessors, (33), 11 states have call successors, (33) [2023-02-15 21:35:24,607 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 117 transitions. [2023-02-15 21:35:24,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-02-15 21:35:24,610 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:24,610 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:24,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:24,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:24,817 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:24,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:24,817 INFO L85 PathProgramCache]: Analyzing trace with hash -270180431, now seen corresponding path program 3 times [2023-02-15 21:35:24,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:24,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099154422] [2023-02-15 21:35:24,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:24,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:24,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:24,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:35:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:25,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:25,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:25,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:25,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:35:25,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:25,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:25,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-02-15 21:35:25,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:25,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:25,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:25,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:25,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:25,446 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 249 proven. 113 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2023-02-15 21:35:25,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:25,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099154422] [2023-02-15 21:35:25,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099154422] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:25,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783655465] [2023-02-15 21:35:25,447 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:35:25,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:25,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:25,448 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) [2023-02-15 21:35:25,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-15 21:35:25,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-02-15 21:35:25,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:25,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 21:35:25,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:25,650 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 236 proven. 115 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2023-02-15 21:35:25,651 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:26,884 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 252 proven. 113 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2023-02-15 21:35:26,885 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783655465] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:26,885 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:26,885 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 23 [2023-02-15 21:35:26,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664254975] [2023-02-15 21:35:26,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:26,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-02-15 21:35:26,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:26,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-02-15 21:35:26,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-02-15 21:35:26,887 INFO L87 Difference]: Start difference. First operand 77 states and 117 transitions. Second operand has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 11 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2023-02-15 21:35:27,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:27,230 INFO L93 Difference]: Finished difference Result 168 states and 314 transitions. [2023-02-15 21:35:27,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-02-15 21:35:27,231 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 11 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) Word has length 118 [2023-02-15 21:35:27,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:27,234 INFO L225 Difference]: With dead ends: 168 [2023-02-15 21:35:27,235 INFO L226 Difference]: Without dead ends: 100 [2023-02-15 21:35:27,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 249 SyntacticMatches, 14 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=1195, Unknown=0, NotChecked=0, Total=1560 [2023-02-15 21:35:27,237 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 40 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:27,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 166 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:35:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-15 21:35:27,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-15 21:35:27,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 68 states have internal predecessors, (75), 18 states have call successors, (18), 9 states have call predecessors, (18), 14 states have return successors, (67), 22 states have call predecessors, (67), 18 states have call successors, (67) [2023-02-15 21:35:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 160 transitions. [2023-02-15 21:35:27,254 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 160 transitions. Word has length 118 [2023-02-15 21:35:27,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:27,254 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 160 transitions. [2023-02-15 21:35:27,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.739130434782609) internal successors, (63), 21 states have internal predecessors, (63), 11 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2023-02-15 21:35:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 160 transitions. [2023-02-15 21:35:27,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2023-02-15 21:35:27,258 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:27,259 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 12, 9, 8, 8, 8, 8, 8, 8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:27,267 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:27,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:27,467 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:27,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:27,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1294012555, now seen corresponding path program 4 times [2023-02-15 21:35:27,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:27,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506183136] [2023-02-15 21:35:27,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:27,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:27,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:35:27,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:27,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:27,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:27,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:27,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:27,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:35:28,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:28,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:28,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:28,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-02-15 21:35:28,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 157 proven. 360 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2023-02-15 21:35:28,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:28,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506183136] [2023-02-15 21:35:28,194 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506183136] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:28,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631263440] [2023-02-15 21:35:28,194 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:35:28,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:28,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:28,197 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) [2023-02-15 21:35:28,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-15 21:35:28,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:35:28,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:28,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 21 conjunts are in the unsatisfiable core [2023-02-15 21:35:28,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:28,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 595 proven. 114 refuted. 0 times theorem prover too weak. 321 trivial. 0 not checked. [2023-02-15 21:35:28,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:29,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1030 backedges. 160 proven. 360 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2023-02-15 21:35:29,908 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631263440] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:29,908 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:29,909 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 24 [2023-02-15 21:35:29,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121216454] [2023-02-15 21:35:29,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:29,909 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-02-15 21:35:29,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:29,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-02-15 21:35:29,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-02-15 21:35:29,911 INFO L87 Difference]: Start difference. First operand 100 states and 160 transitions. Second operand has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-02-15 21:35:30,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:30,320 INFO L93 Difference]: Finished difference Result 191 states and 332 transitions. [2023-02-15 21:35:30,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-02-15 21:35:30,321 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) Word has length 144 [2023-02-15 21:35:30,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:30,323 INFO L225 Difference]: With dead ends: 191 [2023-02-15 21:35:30,323 INFO L226 Difference]: Without dead ends: 100 [2023-02-15 21:35:30,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 309 SyntacticMatches, 14 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=1519, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 21:35:30,326 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 24 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:30,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 188 Invalid, 394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:35:30,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-02-15 21:35:30,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-02-15 21:35:30,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 68 states have internal predecessors, (75), 18 states have call successors, (18), 9 states have call predecessors, (18), 14 states have return successors, (59), 22 states have call predecessors, (59), 18 states have call successors, (59) [2023-02-15 21:35:30,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 152 transitions. [2023-02-15 21:35:30,340 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 152 transitions. Word has length 144 [2023-02-15 21:35:30,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:30,340 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 152 transitions. [2023-02-15 21:35:30,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-02-15 21:35:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 152 transitions. [2023-02-15 21:35:30,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2023-02-15 21:35:30,343 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:30,343 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:30,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:30,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:30,549 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:30,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1701842998, now seen corresponding path program 5 times [2023-02-15 21:35:30,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:30,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565615318] [2023-02-15 21:35:30,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:30,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:30,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:30,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:35:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:31,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:35:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:31,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-15 21:35:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:31,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:31,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 445 proven. 284 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2023-02-15 21:35:31,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:31,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565615318] [2023-02-15 21:35:31,593 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565615318] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:31,593 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787485401] [2023-02-15 21:35:31,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:35:31,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:31,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:31,594 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) [2023-02-15 21:35:31,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-15 21:35:31,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-02-15 21:35:31,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:31,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjunts are in the unsatisfiable core [2023-02-15 21:35:31,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:31,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2023-02-15 21:35:31,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:35,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2023-02-15 21:35:35,221 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787485401] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:35,222 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:35,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 27] total 38 [2023-02-15 21:35:35,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846184598] [2023-02-15 21:35:35,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:35,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-02-15 21:35:35,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-02-15 21:35:35,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2023-02-15 21:35:35,228 INFO L87 Difference]: Start difference. First operand 100 states and 152 transitions. Second operand has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2023-02-15 21:35:35,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:35,878 INFO L93 Difference]: Finished difference Result 206 states and 359 transitions. [2023-02-15 21:35:35,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-02-15 21:35:35,886 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) Word has length 157 [2023-02-15 21:35:35,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:35,891 INFO L225 Difference]: With dead ends: 206 [2023-02-15 21:35:35,892 INFO L226 Difference]: Without dead ends: 115 [2023-02-15 21:35:35,894 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 328 SyntacticMatches, 19 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1069 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=799, Invalid=3361, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 21:35:35,896 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 45 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:35,897 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 277 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:35:35,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-02-15 21:35:35,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2023-02-15 21:35:35,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 76 states have (on average 1.105263157894737) internal successors, (84), 77 states have internal predecessors, (84), 21 states have call successors, (21), 9 states have call predecessors, (21), 17 states have return successors, (80), 28 states have call predecessors, (80), 21 states have call successors, (80) [2023-02-15 21:35:35,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 185 transitions. [2023-02-15 21:35:35,931 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 185 transitions. Word has length 157 [2023-02-15 21:35:35,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:35,933 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 185 transitions. [2023-02-15 21:35:35,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.210526315789474) internal successors, (84), 32 states have internal predecessors, (84), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2023-02-15 21:35:35,933 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 185 transitions. [2023-02-15 21:35:35,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2023-02-15 21:35:35,936 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:35,936 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:35,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:36,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:36,143 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:36,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:36,143 INFO L85 PathProgramCache]: Analyzing trace with hash 332854534, now seen corresponding path program 6 times [2023-02-15 21:35:36,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:36,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282285796] [2023-02-15 21:35:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:36,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:36,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:35:36,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:35:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:36,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-15 21:35:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:36,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:36,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:37,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:37,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:37,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:37,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:37,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:37,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:37,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:37,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:37,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:37,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:37,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:37,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:37,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:37,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 21:35:37,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:37,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-15 21:35:37,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:37,607 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 600 proven. 156 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2023-02-15 21:35:37,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:37,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282285796] [2023-02-15 21:35:37,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282285796] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:37,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325302190] [2023-02-15 21:35:37,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:35:37,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:37,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:37,613 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) [2023-02-15 21:35:37,621 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-15 21:35:37,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2023-02-15 21:35:37,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:37,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 79 conjunts are in the unsatisfiable core [2023-02-15 21:35:37,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 583 proven. 158 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2023-02-15 21:35:38,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:39,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 597 proven. 189 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2023-02-15 21:35:39,793 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325302190] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:39,793 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:39,794 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 33] total 36 [2023-02-15 21:35:39,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240508751] [2023-02-15 21:35:39,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:39,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-02-15 21:35:39,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:39,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-02-15 21:35:39,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2023-02-15 21:35:39,796 INFO L87 Difference]: Start difference. First operand 115 states and 185 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-15 21:35:41,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:41,865 INFO L93 Difference]: Finished difference Result 237 states and 471 transitions. [2023-02-15 21:35:41,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-02-15 21:35:41,866 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) Word has length 183 [2023-02-15 21:35:41,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:41,870 INFO L225 Difference]: With dead ends: 237 [2023-02-15 21:35:41,870 INFO L226 Difference]: Without dead ends: 233 [2023-02-15 21:35:41,872 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 397 SyntacticMatches, 16 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=582, Invalid=4530, Unknown=0, NotChecked=0, Total=5112 [2023-02-15 21:35:41,873 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 144 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:41,873 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 462 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-02-15 21:35:41,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2023-02-15 21:35:41,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 187. [2023-02-15 21:35:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 122 states have (on average 1.0819672131147542) internal successors, (132), 123 states have internal predecessors, (132), 31 states have call successors, (31), 11 states have call predecessors, (31), 33 states have return successors, (230), 52 states have call predecessors, (230), 31 states have call successors, (230) [2023-02-15 21:35:41,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 393 transitions. [2023-02-15 21:35:41,901 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 393 transitions. Word has length 183 [2023-02-15 21:35:41,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:41,901 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 393 transitions. [2023-02-15 21:35:41,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 29 states have internal predecessors, (56), 6 states have call successors, (9), 1 states have call predecessors, (9), 14 states have return successors, (22), 13 states have call predecessors, (22), 6 states have call successors, (22) [2023-02-15 21:35:41,902 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 393 transitions. [2023-02-15 21:35:41,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2023-02-15 21:35:41,904 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:41,904 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:41,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:42,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:42,111 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:42,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash -860565711, now seen corresponding path program 7 times [2023-02-15 21:35:42,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:42,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910685062] [2023-02-15 21:35:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:42,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:42,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:35:42,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:42,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:42,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:42,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:42,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:42,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:42,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:42,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:42,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:35:42,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:42,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:42,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:42,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:42,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:42,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:42,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:42,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-15 21:35:43,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:43,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:43,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:43,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:43,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 21:35:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 502 proven. 372 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2023-02-15 21:35:43,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:43,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910685062] [2023-02-15 21:35:43,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910685062] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:43,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586528043] [2023-02-15 21:35:43,293 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-15 21:35:43,293 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:43,293 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:43,295 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) [2023-02-15 21:35:43,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-15 21:35:43,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:43,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 37 conjunts are in the unsatisfiable core [2023-02-15 21:35:43,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2023-02-15 21:35:43,635 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:47,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 525 proven. 384 refuted. 0 times theorem prover too weak. 574 trivial. 0 not checked. [2023-02-15 21:35:47,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586528043] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:47,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:47,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 28] total 35 [2023-02-15 21:35:47,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852486100] [2023-02-15 21:35:47,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:47,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-15 21:35:47,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:47,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-15 21:35:47,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2023-02-15 21:35:47,207 INFO L87 Difference]: Start difference. First operand 187 states and 393 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2023-02-15 21:35:47,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:47,840 INFO L93 Difference]: Finished difference Result 346 states and 797 transitions. [2023-02-15 21:35:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-02-15 21:35:47,853 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) Word has length 170 [2023-02-15 21:35:47,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:47,857 INFO L225 Difference]: With dead ends: 346 [2023-02-15 21:35:47,857 INFO L226 Difference]: Without dead ends: 168 [2023-02-15 21:35:47,861 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 355 SyntacticMatches, 26 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=865, Invalid=3295, Unknown=0, NotChecked=0, Total=4160 [2023-02-15 21:35:47,863 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 76 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:47,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 235 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-15 21:35:47,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-02-15 21:35:47,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2023-02-15 21:35:47,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 110 states have (on average 1.0818181818181818) internal successors, (119), 111 states have internal predecessors, (119), 27 states have call successors, (27), 10 states have call predecessors, (27), 30 states have return successors, (162), 46 states have call predecessors, (162), 27 states have call successors, (162) [2023-02-15 21:35:47,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 308 transitions. [2023-02-15 21:35:47,886 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 308 transitions. Word has length 170 [2023-02-15 21:35:47,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:47,887 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 308 transitions. [2023-02-15 21:35:47,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 31 states have internal predecessors, (85), 17 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (37), 16 states have call predecessors, (37), 17 states have call successors, (37) [2023-02-15 21:35:47,887 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 308 transitions. [2023-02-15 21:35:47,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-02-15 21:35:47,890 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:47,890 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 16, 13, 12, 12, 12, 12, 12, 12, 12, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:47,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:48,102 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,SelfDestructingSolverStorable8 [2023-02-15 21:35:48,102 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:48,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:48,103 INFO L85 PathProgramCache]: Analyzing trace with hash 530318069, now seen corresponding path program 8 times [2023-02-15 21:35:48,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:48,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11926754] [2023-02-15 21:35:48,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:48,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:48,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:35:48,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:48,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:48,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:48,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:35:48,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:48,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:48,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:49,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-15 21:35:49,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:49,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:49,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:49,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 21:35:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-15 21:35:49,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-15 21:35:49,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:49,497 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 664 proven. 533 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2023-02-15 21:35:49,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:49,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11926754] [2023-02-15 21:35:49,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11926754] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:49,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812638586] [2023-02-15 21:35:49,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-15 21:35:49,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:49,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:49,499 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) [2023-02-15 21:35:49,511 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-15 21:35:49,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-15 21:35:49,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:49,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 598 conjuncts, 41 conjunts are in the unsatisfiable core [2023-02-15 21:35:49,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:49,882 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 647 proven. 519 refuted. 0 times theorem prover too weak. 854 trivial. 0 not checked. [2023-02-15 21:35:49,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:53,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2020 backedges. 685 proven. 580 refuted. 0 times theorem prover too weak. 755 trivial. 0 not checked. [2023-02-15 21:35:53,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812638586] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:53,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:53,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 23, 32] total 39 [2023-02-15 21:35:53,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398981527] [2023-02-15 21:35:53,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:53,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-15 21:35:53,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:53,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-15 21:35:53,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1280, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 21:35:53,928 INFO L87 Difference]: Start difference. First operand 168 states and 308 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 35 states have internal predecessors, (97), 21 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (45), 18 states have call predecessors, (45), 21 states have call successors, (45) [2023-02-15 21:35:54,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:54,656 INFO L93 Difference]: Finished difference Result 349 states and 744 transitions. [2023-02-15 21:35:54,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-02-15 21:35:54,657 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 35 states have internal predecessors, (97), 21 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (45), 18 states have call predecessors, (45), 21 states have call successors, (45) Word has length 196 [2023-02-15 21:35:54,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:54,661 INFO L225 Difference]: With dead ends: 349 [2023-02-15 21:35:54,661 INFO L226 Difference]: Without dead ends: 190 [2023-02-15 21:35:54,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 409 SyntacticMatches, 30 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=789, Invalid=3243, Unknown=0, NotChecked=0, Total=4032 [2023-02-15 21:35:54,666 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 138 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:54,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 348 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-02-15 21:35:54,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-02-15 21:35:54,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 173. [2023-02-15 21:35:54,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 114 states have internal predecessors, (121), 28 states have call successors, (28), 10 states have call predecessors, (28), 31 states have return successors, (166), 48 states have call predecessors, (166), 28 states have call successors, (166) [2023-02-15 21:35:54,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 315 transitions. [2023-02-15 21:35:54,691 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 315 transitions. Word has length 196 [2023-02-15 21:35:54,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:54,692 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 315 transitions. [2023-02-15 21:35:54,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 35 states have internal predecessors, (97), 21 states have call successors, (24), 1 states have call predecessors, (24), 20 states have return successors, (45), 18 states have call predecessors, (45), 21 states have call successors, (45) [2023-02-15 21:35:54,692 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 315 transitions. [2023-02-15 21:35:54,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-02-15 21:35:54,695 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:54,695 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 17, 14, 13, 13, 13, 13, 13, 13, 13, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:54,707 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:54,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-02-15 21:35:54,904 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:54,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:54,905 INFO L85 PathProgramCache]: Analyzing trace with hash 660925528, now seen corresponding path program 9 times [2023-02-15 21:35:54,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:54,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78504560] [2023-02-15 21:35:54,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:54,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:54,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:35:55,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:55,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:35:55,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:55,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:55,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:55,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 21:35:55,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-02-15 21:35:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:55,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:55,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:55,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 21:35:55,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-15 21:35:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-15 21:35:55,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:55,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 267 proven. 793 refuted. 0 times theorem prover too weak. 1260 trivial. 0 not checked. [2023-02-15 21:35:55,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:55,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78504560] [2023-02-15 21:35:55,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78504560] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:55,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199214887] [2023-02-15 21:35:55,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-15 21:35:55,753 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:55,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:55,755 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) [2023-02-15 21:35:55,801 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-15 21:35:56,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2023-02-15 21:35:56,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:56,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 25 conjunts are in the unsatisfiable core [2023-02-15 21:35:56,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:56,260 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 1340 proven. 196 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2023-02-15 21:35:56,260 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:35:58,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2320 backedges. 274 proven. 806 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2023-02-15 21:35:58,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199214887] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:35:58,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:35:58,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 21] total 28 [2023-02-15 21:35:58,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22320216] [2023-02-15 21:35:58,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:35:58,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-02-15 21:35:58,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:35:58,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-02-15 21:35:58,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2023-02-15 21:35:58,204 INFO L87 Difference]: Start difference. First operand 173 states and 315 transitions. Second operand has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 25 states have internal predecessors, (83), 16 states have call successors, (22), 2 states have call predecessors, (22), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2023-02-15 21:35:58,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:35:58,581 INFO L93 Difference]: Finished difference Result 338 states and 689 transitions. [2023-02-15 21:35:58,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-02-15 21:35:58,583 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 25 states have internal predecessors, (83), 16 states have call successors, (22), 2 states have call predecessors, (22), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) Word has length 209 [2023-02-15 21:35:58,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:35:58,586 INFO L225 Difference]: With dead ends: 338 [2023-02-15 21:35:58,586 INFO L226 Difference]: Without dead ends: 174 [2023-02-15 21:35:58,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 453 SyntacticMatches, 18 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=423, Invalid=1557, Unknown=0, NotChecked=0, Total=1980 [2023-02-15 21:35:58,590 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 52 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-15 21:35:58,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 260 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-15 21:35:58,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2023-02-15 21:35:58,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2023-02-15 21:35:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 113 states have (on average 1.0707964601769913) internal successors, (121), 114 states have internal predecessors, (121), 28 states have call successors, (28), 10 states have call predecessors, (28), 31 states have return successors, (162), 48 states have call predecessors, (162), 28 states have call successors, (162) [2023-02-15 21:35:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 311 transitions. [2023-02-15 21:35:58,607 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 311 transitions. Word has length 209 [2023-02-15 21:35:58,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:35:58,608 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 311 transitions. [2023-02-15 21:35:58,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9642857142857144) internal successors, (83), 25 states have internal predecessors, (83), 16 states have call successors, (22), 2 states have call predecessors, (22), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2023-02-15 21:35:58,609 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 311 transitions. [2023-02-15 21:35:58,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2023-02-15 21:35:58,612 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:35:58,612 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 23, 19, 18, 18, 18, 18, 18, 18, 18, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:35:58,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-15 21:35:58,820 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,SelfDestructingSolverStorable10 [2023-02-15 21:35:58,820 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:35:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:35:58,821 INFO L85 PathProgramCache]: Analyzing trace with hash 471385981, now seen corresponding path program 10 times [2023-02-15 21:35:58,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:35:58,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829903211] [2023-02-15 21:35:58,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:35:58,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:35:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:58,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:35:59,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:35:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:59,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:59,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:59,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-02-15 21:35:59,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:59,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:59,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 21:35:59,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-15 21:35:59,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2023-02-15 21:35:59,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:35:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:35:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:35:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:35:59,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 21:35:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-15 21:35:59,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-15 21:35:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:35:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 228 proven. 519 refuted. 0 times theorem prover too weak. 3582 trivial. 0 not checked. [2023-02-15 21:35:59,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:35:59,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829903211] [2023-02-15 21:35:59,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829903211] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:35:59,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684585070] [2023-02-15 21:35:59,502 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-15 21:35:59,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:35:59,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:35:59,503 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) [2023-02-15 21:35:59,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-15 21:35:59,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-15 21:35:59,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:35:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 681 conjuncts, 10 conjunts are in the unsatisfiable core [2023-02-15 21:35:59,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:35:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 507 refuted. 0 times theorem prover too weak. 3588 trivial. 0 not checked. [2023-02-15 21:35:59,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4329 backedges. 234 proven. 522 refuted. 0 times theorem prover too weak. 3573 trivial. 0 not checked. [2023-02-15 21:36:00,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684585070] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:00,778 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:00,778 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 15 [2023-02-15 21:36:00,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749915860] [2023-02-15 21:36:00,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:00,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-02-15 21:36:00,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:00,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-02-15 21:36:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-02-15 21:36:00,780 INFO L87 Difference]: Start difference. First operand 173 states and 311 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 11 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2023-02-15 21:36:00,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:00,887 INFO L93 Difference]: Finished difference Result 177 states and 314 transitions. [2023-02-15 21:36:00,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-02-15 21:36:00,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 11 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) Word has length 281 [2023-02-15 21:36:00,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:00,890 INFO L225 Difference]: With dead ends: 177 [2023-02-15 21:36:00,890 INFO L226 Difference]: Without dead ends: 173 [2023-02-15 21:36:00,891 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 631 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2023-02-15 21:36:00,892 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 22 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:00,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 107 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2023-02-15 21:36:00,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 161. [2023-02-15 21:36:00,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 105 states have (on average 1.0761904761904761) internal successors, (113), 106 states have internal predecessors, (113), 28 states have call successors, (28), 10 states have call predecessors, (28), 27 states have return successors, (126), 44 states have call predecessors, (126), 28 states have call successors, (126) [2023-02-15 21:36:00,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 267 transitions. [2023-02-15 21:36:00,927 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 267 transitions. Word has length 281 [2023-02-15 21:36:00,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:00,927 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 267 transitions. [2023-02-15 21:36:00,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 15 states have internal predecessors, (51), 11 states have call successors, (14), 1 states have call predecessors, (14), 6 states have return successors, (18), 7 states have call predecessors, (18), 11 states have call successors, (18) [2023-02-15 21:36:00,928 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 267 transitions. [2023-02-15 21:36:00,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2023-02-15 21:36:00,931 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:00,931 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 23, 18, 17, 17, 17, 17, 17, 17, 17, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:00,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:01,140 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,SelfDestructingSolverStorable11 [2023-02-15 21:36:01,140 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:01,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:01,140 INFO L85 PathProgramCache]: Analyzing trace with hash 582117116, now seen corresponding path program 11 times [2023-02-15 21:36:01,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:01,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763640688] [2023-02-15 21:36:01,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:01,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:01,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:36:02,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:36:02,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:36:02,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:36:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:36:02,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-02-15 21:36:02,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:36:02,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:36:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:36:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 21:36:02,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2023-02-15 21:36:02,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:36:02,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:36:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:36:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 21:36:02,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-15 21:36:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-15 21:36:02,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4107 backedges. 599 proven. 1333 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2023-02-15 21:36:02,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:02,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763640688] [2023-02-15 21:36:02,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763640688] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:02,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487332950] [2023-02-15 21:36:02,522 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-15 21:36:02,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:02,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:02,524 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) [2023-02-15 21:36:02,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-02-15 21:36:02,893 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2023-02-15 21:36:02,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:02,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 39 conjunts are in the unsatisfiable core [2023-02-15 21:36:02,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:03,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4107 backedges. 2428 proven. 401 refuted. 0 times theorem prover too weak. 1278 trivial. 0 not checked. [2023-02-15 21:36:03,021 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:08,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4107 backedges. 700 proven. 1204 refuted. 0 times theorem prover too weak. 2203 trivial. 0 not checked. [2023-02-15 21:36:08,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487332950] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:08,296 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:08,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 29] total 39 [2023-02-15 21:36:08,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057585393] [2023-02-15 21:36:08,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:08,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-02-15 21:36:08,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:08,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-02-15 21:36:08,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1300, Unknown=0, NotChecked=0, Total=1482 [2023-02-15 21:36:08,299 INFO L87 Difference]: Start difference. First operand 161 states and 267 transitions. Second operand has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 34 states have internal predecessors, (101), 20 states have call successors, (26), 2 states have call predecessors, (26), 19 states have return successors, (46), 19 states have call predecessors, (46), 20 states have call successors, (46) [2023-02-15 21:36:09,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:09,210 INFO L93 Difference]: Finished difference Result 308 states and 572 transitions. [2023-02-15 21:36:09,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-02-15 21:36:09,213 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 34 states have internal predecessors, (101), 20 states have call successors, (26), 2 states have call predecessors, (26), 19 states have return successors, (46), 19 states have call predecessors, (46), 20 states have call successors, (46) Word has length 275 [2023-02-15 21:36:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:09,216 INFO L225 Difference]: With dead ends: 308 [2023-02-15 21:36:09,216 INFO L226 Difference]: Without dead ends: 156 [2023-02-15 21:36:09,219 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 695 GetRequests, 595 SyntacticMatches, 28 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1096, Invalid=4306, Unknown=0, NotChecked=0, Total=5402 [2023-02-15 21:36:09,220 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 103 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:09,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 270 Invalid, 1095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-02-15 21:36:09,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2023-02-15 21:36:09,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2023-02-15 21:36:09,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 102 states have (on average 1.0784313725490196) internal successors, (110), 103 states have internal predecessors, (110), 27 states have call successors, (27), 10 states have call predecessors, (27), 26 states have return successors, (105), 42 states have call predecessors, (105), 27 states have call successors, (105) [2023-02-15 21:36:09,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 242 transitions. [2023-02-15 21:36:09,234 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 242 transitions. Word has length 275 [2023-02-15 21:36:09,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:09,234 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 242 transitions. [2023-02-15 21:36:09,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.58974358974359) internal successors, (101), 34 states have internal predecessors, (101), 20 states have call successors, (26), 2 states have call predecessors, (26), 19 states have return successors, (46), 19 states have call predecessors, (46), 20 states have call successors, (46) [2023-02-15 21:36:09,235 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 242 transitions. [2023-02-15 21:36:09,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2023-02-15 21:36:09,238 INFO L187 NwaCegarLoop]: Found error trace [2023-02-15 21:36:09,238 INFO L195 NwaCegarLoop]: trace histogram [43, 43, 24, 19, 18, 18, 18, 18, 18, 18, 18, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-15 21:36:09,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:09,446 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,SelfDestructingSolverStorable12 [2023-02-15 21:36:09,446 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-15 21:36:09,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-15 21:36:09,446 INFO L85 PathProgramCache]: Analyzing trace with hash 160073869, now seen corresponding path program 12 times [2023-02-15 21:36:09,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-15 21:36:09,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692031232] [2023-02-15 21:36:09,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-15 21:36:09,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-15 21:36:09,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:09,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2023-02-15 21:36:09,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:09,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:09,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:36:10,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-02-15 21:36:10,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:36:10,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:36:10,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:36:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2023-02-15 21:36:10,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:36:10,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:36:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:36:10,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 21:36:10,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-15 21:36:10,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2023-02-15 21:36:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-02-15 21:36:10,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-02-15 21:36:10,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-02-15 21:36:10,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-02-15 21:36:10,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-02-15 21:36:10,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-02-15 21:36:10,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2023-02-15 21:36:10,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-15 21:36:10,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 563 proven. 1446 refuted. 0 times theorem prover too weak. 2521 trivial. 0 not checked. [2023-02-15 21:36:10,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-15 21:36:10,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692031232] [2023-02-15 21:36:10,623 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692031232] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-15 21:36:10,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116819101] [2023-02-15 21:36:10,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-15 21:36:10,624 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-15 21:36:10,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-15 21:36:10,625 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) [2023-02-15 21:36:10,628 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-02-15 21:36:11,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2023-02-15 21:36:11,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-15 21:36:11,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 821 conjuncts, 16 conjunts are in the unsatisfiable core [2023-02-15 21:36:11,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-15 21:36:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 342 proven. 850 refuted. 0 times theorem prover too weak. 3338 trivial. 0 not checked. [2023-02-15 21:36:11,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-15 21:36:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4530 backedges. 352 proven. 878 refuted. 0 times theorem prover too weak. 3300 trivial. 0 not checked. [2023-02-15 21:36:12,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116819101] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-15 21:36:12,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-15 21:36:12,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 11] total 17 [2023-02-15 21:36:12,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942648691] [2023-02-15 21:36:12,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-15 21:36:12,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-02-15 21:36:12,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-15 21:36:12,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-02-15 21:36:12,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2023-02-15 21:36:12,657 INFO L87 Difference]: Start difference. First operand 156 states and 242 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-02-15 21:36:12,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-15 21:36:12,853 INFO L93 Difference]: Finished difference Result 304 states and 532 transitions. [2023-02-15 21:36:12,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-02-15 21:36:12,854 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) Word has length 288 [2023-02-15 21:36:12,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-15 21:36:12,854 INFO L225 Difference]: With dead ends: 304 [2023-02-15 21:36:12,854 INFO L226 Difference]: Without dead ends: 0 [2023-02-15 21:36:12,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 685 GetRequests, 653 SyntacticMatches, 11 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=364, Unknown=0, NotChecked=0, Total=506 [2023-02-15 21:36:12,857 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 45 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-15 21:36:12,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 143 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-15 21:36:12,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-02-15 21:36:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-02-15 21:36:12,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-15 21:36:12,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-02-15 21:36:12,858 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 288 [2023-02-15 21:36:12,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-15 21:36:12,859 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-02-15 21:36:12,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 11 states have call successors, (20), 1 states have call predecessors, (20), 8 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-02-15 21:36:12,859 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-02-15 21:36:12,859 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-02-15 21:36:12,862 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-02-15 21:36:12,873 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-02-15 21:36:13,070 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,SelfDestructingSolverStorable13 [2023-02-15 21:36:13,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2023-02-15 21:36:15,563 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2023-02-15 21:36:15,564 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2023-02-15 21:36:15,564 INFO L899 garLoopResultBuilder]: For program point L29(lines 29 33) no Hoare annotation was computed. [2023-02-15 21:36:15,564 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2023-02-15 21:36:15,564 INFO L902 garLoopResultBuilder]: At program point L27(lines 27 47) the Hoare annotation is: true [2023-02-15 21:36:15,564 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 45) no Hoare annotation was computed. [2023-02-15 21:36:15,564 INFO L899 garLoopResultBuilder]: For program point L45(line 45) no Hoare annotation was computed. [2023-02-15 21:36:15,564 INFO L899 garLoopResultBuilder]: For program point L42(lines 42 46) no Hoare annotation was computed. [2023-02-15 21:36:15,564 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2023-02-15 21:36:15,564 INFO L902 garLoopResultBuilder]: At program point L41(line 41) the Hoare annotation is: true [2023-02-15 21:36:15,564 INFO L899 garLoopResultBuilder]: For program point L41-1(line 41) no Hoare annotation was computed. [2023-02-15 21:36:15,564 INFO L899 garLoopResultBuilder]: For program point L35(lines 35 40) no Hoare annotation was computed. [2023-02-15 21:36:15,565 INFO L899 garLoopResultBuilder]: For program point ackermannEXIT(lines 16 24) no Hoare annotation was computed. [2023-02-15 21:36:15,565 INFO L895 garLoopResultBuilder]: At program point L23(line 23) the Hoare annotation is: (and (= ackermann_~m |ackermann_#in~m|) (or (not (= |ackermann_#in~m| 0)) (not (<= 1 |ackermann_#in~n|)) (not (<= |ackermann_#in~n| 1))) (= |ackermann_#in~n| ackermann_~n)) [2023-02-15 21:36:15,565 INFO L899 garLoopResultBuilder]: For program point L23-1(line 23) no Hoare annotation was computed. [2023-02-15 21:36:15,567 INFO L895 garLoopResultBuilder]: At program point L21(line 21) the Hoare annotation is: (and (= |ackermann_#in~n| 0) (= |ackermann_#in~m| ackermann_~m) (= |ackermann_#in~n| ackermann_~n)) [2023-02-15 21:36:15,570 INFO L895 garLoopResultBuilder]: At program point L23-2(line 23) the Hoare annotation is: (let ((.cse8 (= ackermann_~m |ackermann_#in~m|)) (.cse2 (= |ackermann_#in~m| 0)) (.cse10 (= ackermann_~n |ackermann_#in~n|)) (.cse4 (<= |ackermann_#in~n| 1)) (.cse16 (<= |ackermann_#t~ret5| 3)) (.cse0 (<= 1 |ackermann_#in~n|)) (.cse11 (<= 2 |ackermann_#in~m|)) (.cse13 (= |ackermann_#in~n| ackermann_~n)) (.cse9 (<= 3 |ackermann_#t~ret5|))) (let ((.cse3 (and .cse4 .cse16 .cse0 .cse11 (<= |ackermann_#in~m| 2) (= |ackermann_#in~m| ackermann_~m) .cse13 .cse9)) (.cse1 (<= 3 |ackermann_#in~m|)) (.cse5 (and .cse8 .cse2 .cse10)) (.cse15 (<= 3 |ackermann_#in~n|)) (.cse12 (<= 5 |ackermann_#t~ret5|)) (.cse14 (<= |ackermann_#t~ret5| 5)) (.cse7 (<= |ackermann_#in~m| 1))) (and (or (and .cse0 .cse1) .cse2 .cse3 (and .cse0 (<= |ackermann_#t~ret5| 2)) (not .cse4)) (let ((.cse6 (<= 1 |ackermann_#in~m|))) (or .cse5 .cse3 (and .cse6 .cse7 .cse8 .cse9 .cse10) (and .cse6 .cse7 .cse8 (< |ackermann_#in~n| 2) (<= 2 |ackermann_#t~ret5|) .cse10) (and .cse8 .cse11 .cse12 .cse13))) (or (not .cse11) .cse14 .cse15 .cse1) (or (and (<= 6 |ackermann_#in~n|) .cse12) .cse5 (and (<= |ackermann_#in~n| 3) .cse15 (<= |ackermann_#t~ret5| 4) (<= 4 |ackermann_#t~ret5|)) (and .cse12 .cse14 (<= 4 |ackermann_#in~n|) (<= |ackermann_#in~n| 4)) (not .cse7) (and .cse16 (<= |ackermann_#in~n| 2)) (and (<= |ackermann_#t~ret5| 6) (<= 5 |ackermann_#in~n|) (<= 6 |ackermann_#t~ret5|)))))) [2023-02-15 21:36:15,570 INFO L899 garLoopResultBuilder]: For program point L20(lines 20 22) no Hoare annotation was computed. [2023-02-15 21:36:15,570 INFO L899 garLoopResultBuilder]: For program point L21-1(line 21) no Hoare annotation was computed. [2023-02-15 21:36:15,570 INFO L899 garLoopResultBuilder]: For program point L23-3(line 23) no Hoare annotation was computed. [2023-02-15 21:36:15,570 INFO L899 garLoopResultBuilder]: For program point L17(lines 17 19) no Hoare annotation was computed. [2023-02-15 21:36:15,570 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 16 24) the Hoare annotation is: true [2023-02-15 21:36:15,570 INFO L899 garLoopResultBuilder]: For program point ackermannFINAL(lines 16 24) no Hoare annotation was computed. [2023-02-15 21:36:15,573 INFO L445 BasicCegarLoop]: Path program histogram: [12, 1, 1] [2023-02-15 21:36:15,575 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-02-15 21:36:15,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.02 09:36:15 BoogieIcfgContainer [2023-02-15 21:36:15,582 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-02-15 21:36:15,586 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-02-15 21:36:15,586 INFO L271 PluginConnector]: Initializing Witness Printer... [2023-02-15 21:36:15,587 INFO L275 PluginConnector]: Witness Printer initialized [2023-02-15 21:36:15,587 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 09:35:18" (3/4) ... [2023-02-15 21:36:15,596 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-02-15 21:36:15,609 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2023-02-15 21:36:15,612 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2023-02-15 21:36:15,612 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-02-15 21:36:15,612 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-02-15 21:36:15,613 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-02-15 21:36:15,641 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2023-02-15 21:36:15,641 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-02-15 21:36:15,642 INFO L158 Benchmark]: Toolchain (without parser) took 57878.71ms. Allocated memory was 119.5MB in the beginning and 629.1MB in the end (delta: 509.6MB). Free memory was 75.5MB in the beginning and 438.4MB in the end (delta: -362.9MB). Peak memory consumption was 149.0MB. Max. memory is 16.1GB. [2023-02-15 21:36:15,642 INFO L158 Benchmark]: CDTParser took 0.56ms. Allocated memory is still 98.6MB. Free memory is still 50.7MB. There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 21:36:15,642 INFO L158 Benchmark]: CACSL2BoogieTranslator took 172.01ms. Allocated memory is still 119.5MB. Free memory was 75.1MB in the beginning and 65.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 21:36:15,642 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.36ms. Allocated memory is still 119.5MB. Free memory was 65.0MB in the beginning and 63.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 21:36:15,643 INFO L158 Benchmark]: Boogie Preprocessor took 13.20ms. Allocated memory is still 119.5MB. Free memory was 63.7MB in the beginning and 62.8MB in the end (delta: 871.0kB). There was no memory consumed. Max. memory is 16.1GB. [2023-02-15 21:36:15,643 INFO L158 Benchmark]: RCFGBuilder took 296.78ms. Allocated memory is still 119.5MB. Free memory was 62.8MB in the beginning and 52.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2023-02-15 21:36:15,643 INFO L158 Benchmark]: TraceAbstraction took 57307.22ms. Allocated memory was 119.5MB in the beginning and 629.1MB in the end (delta: 509.6MB). Free memory was 51.6MB in the beginning and 440.5MB in the end (delta: -388.8MB). Peak memory consumption was 350.9MB. Max. memory is 16.1GB. [2023-02-15 21:36:15,644 INFO L158 Benchmark]: Witness Printer took 55.03ms. Allocated memory is still 629.1MB. Free memory was 440.5MB in the beginning and 438.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-02-15 21:36:15,645 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.56ms. Allocated memory is still 98.6MB. Free memory is still 50.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 172.01ms. Allocated memory is still 119.5MB. Free memory was 75.1MB in the beginning and 65.0MB in the end (delta: 10.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.36ms. Allocated memory is still 119.5MB. Free memory was 65.0MB in the beginning and 63.7MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 13.20ms. Allocated memory is still 119.5MB. Free memory was 63.7MB in the beginning and 62.8MB in the end (delta: 871.0kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 296.78ms. Allocated memory is still 119.5MB. Free memory was 62.8MB in the beginning and 52.4MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 57307.22ms. Allocated memory was 119.5MB in the beginning and 629.1MB in the end (delta: 509.6MB). Free memory was 51.6MB in the beginning and 440.5MB in the end (delta: -388.8MB). Peak memory consumption was 350.9MB. Max. memory is 16.1GB. * Witness Printer took 55.03ms. Allocated memory is still 629.1MB. Free memory was 440.5MB in the beginning and 438.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 45]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 57.2s, OverallIterations: 14, TraceHistogramMax: 43, PathProgramHistogramMax: 12, EmptinessCheckTime: 0.1s, AutomataDifference: 7.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.5s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 904 SdHoareTripleChecker+Valid, 3.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 840 mSDsluCounter, 2878 SdHoareTripleChecker+Invalid, 3.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2500 mSDsCounter, 1401 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7132 IncrementalHoareTripleChecker+Invalid, 8533 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1401 mSolverCounterUnsat, 378 mSDtfsCounter, 7132 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5535 GetRequests, 4766 SyntacticMatches, 192 SemanticMatches, 577 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7908 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=187occurred in iteration=8, InterpolantAutomatonStates: 330, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 14 MinimizatonAttempts, 77 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 938 PreInvPairs, 2577 NumberOfFragments, 244 HoareAnnotationTreeSize, 938 FomulaSimplifications, 33919 FormulaSimplificationTreeSizeReduction, 1.0s HoareSimplificationTime, 6 FomulaSimplificationsInter, 13996 FormulaSimplificationTreeSizeReductionInter, 1.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 40.3s InterpolantComputationTime, 4420 NumberOfCodeBlocks, 4197 NumberOfCodeBlocksAsserted, 128 NumberOfCheckSat, 6584 ConstructedInterpolants, 0 QuantifiedInterpolants, 12631 SizeOfPredicates, 101 NumberOfNonLiveVariables, 6042 ConjunctsInSsa, 355 ConjunctsInUnsatCore, 40 InterpolantComputations, 1 PerfectInterpolantSequences, 57260/72621 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 27]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2023-02-15 21:36:15,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE