./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 910d8e768520d514eafd11bd6e0d202501f1eee040b6e70d07e33c173cc4a1ca --- Real Ultimate output --- This is Ultimate 0.2.2-?-2329fc7 [2023-02-13 21:55:08,214 INFO L177 SettingsManager]: Resetting all preferences to default values... [2023-02-13 21:55:08,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2023-02-13 21:55:08,248 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2023-02-13 21:55:08,248 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2023-02-13 21:55:08,251 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2023-02-13 21:55:08,252 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2023-02-13 21:55:08,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2023-02-13 21:55:08,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2023-02-13 21:55:08,256 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2023-02-13 21:55:08,257 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2023-02-13 21:55:08,259 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2023-02-13 21:55:08,259 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2023-02-13 21:55:08,263 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2023-02-13 21:55:08,264 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2023-02-13 21:55:08,265 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2023-02-13 21:55:08,266 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2023-02-13 21:55:08,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2023-02-13 21:55:08,268 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2023-02-13 21:55:08,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2023-02-13 21:55:08,273 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2023-02-13 21:55:08,274 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2023-02-13 21:55:08,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2023-02-13 21:55:08,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2023-02-13 21:55:08,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2023-02-13 21:55:08,282 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2023-02-13 21:55:08,282 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2023-02-13 21:55:08,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2023-02-13 21:55:08,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2023-02-13 21:55:08,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2023-02-13 21:55:08,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2023-02-13 21:55:08,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2023-02-13 21:55:08,287 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2023-02-13 21:55:08,288 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2023-02-13 21:55:08,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2023-02-13 21:55:08,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2023-02-13 21:55:08,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2023-02-13 21:55:08,289 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2023-02-13 21:55:08,289 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2023-02-13 21:55:08,290 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2023-02-13 21:55:08,291 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2023-02-13 21:55:08,292 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-02-13 21:55:08,315 INFO L113 SettingsManager]: Loading preferences was successful [2023-02-13 21:55:08,315 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2023-02-13 21:55:08,316 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-02-13 21:55:08,316 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-02-13 21:55:08,317 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-02-13 21:55:08,317 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-02-13 21:55:08,317 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-02-13 21:55:08,317 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2023-02-13 21:55:08,317 INFO L138 SettingsManager]: * Use SBE=true [2023-02-13 21:55:08,318 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-02-13 21:55:08,318 INFO L138 SettingsManager]: * sizeof long=4 [2023-02-13 21:55:08,318 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2023-02-13 21:55:08,319 INFO L138 SettingsManager]: * sizeof POINTER=4 [2023-02-13 21:55:08,319 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2023-02-13 21:55:08,319 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-02-13 21:55:08,319 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-02-13 21:55:08,319 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-02-13 21:55:08,319 INFO L138 SettingsManager]: * sizeof long double=12 [2023-02-13 21:55:08,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2023-02-13 21:55:08,320 INFO L138 SettingsManager]: * Use constant arrays=true [2023-02-13 21:55:08,320 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-02-13 21:55:08,320 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-02-13 21:55:08,320 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-02-13 21:55:08,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2023-02-13 21:55:08,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 21:55:08,321 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-02-13 21:55:08,321 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-02-13 21:55:08,321 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-02-13 21:55:08,321 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2023-02-13 21:55:08,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-02-13 21:55:08,322 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-02-13 21:55:08,322 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-02-13 21:55:08,322 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-02-13 21:55:08,322 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-02-13 21:55:08,322 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-02-13 21:55:08,322 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 910d8e768520d514eafd11bd6e0d202501f1eee040b6e70d07e33c173cc4a1ca [2023-02-13 21:55:08,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-02-13 21:55:08,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-02-13 21:55:08,512 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-02-13 21:55:08,512 INFO L271 PluginConnector]: Initializing CDTParser... [2023-02-13 21:55:08,513 INFO L275 PluginConnector]: CDTParser initialized [2023-02-13 21:55:08,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_copy2_ground-2.i [2023-02-13 21:55:09,521 INFO L500 CDTParser]: Created temporary CDT project at NULL [2023-02-13 21:55:09,654 INFO L351 CDTParser]: Found 1 translation units. [2023-02-13 21:55:09,655 INFO L172 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i [2023-02-13 21:55:09,658 INFO L394 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e063a262/32bcbed9e2f141e0aa71ff933a065977/FLAG5debfdf20 [2023-02-13 21:55:09,666 INFO L402 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2e063a262/32bcbed9e2f141e0aa71ff933a065977 [2023-02-13 21:55:09,668 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-02-13 21:55:09,669 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2023-02-13 21:55:09,670 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-02-13 21:55:09,670 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-02-13 21:55:09,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2023-02-13 21:55:09,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@39dd1f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09, skipping insertion in model container [2023-02-13 21:55:09,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2023-02-13 21:55:09,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2023-02-13 21:55:09,779 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i[816,829] [2023-02-13 21:55:09,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 21:55:09,801 INFO L203 MainTranslator]: Completed pre-run [2023-02-13 21:55:09,810 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_copy2_ground-2.i[816,829] [2023-02-13 21:55:09,821 INFO L210 PostProcessor]: Analyzing one entry point: main [2023-02-13 21:55:09,830 INFO L208 MainTranslator]: Completed translation [2023-02-13 21:55:09,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09 WrapperNode [2023-02-13 21:55:09,830 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-02-13 21:55:09,831 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-02-13 21:55:09,831 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-02-13 21:55:09,831 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2023-02-13 21:55:09,835 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,841 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,856 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 80 [2023-02-13 21:55:09,856 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-02-13 21:55:09,857 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-02-13 21:55:09,857 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2023-02-13 21:55:09,857 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2023-02-13 21:55:09,862 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,863 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,870 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,882 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,885 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,888 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-02-13 21:55:09,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-02-13 21:55:09,892 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2023-02-13 21:55:09,892 INFO L275 PluginConnector]: RCFGBuilder initialized [2023-02-13 21:55:09,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (1/1) ... [2023-02-13 21:55:09,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-02-13 21:55:09,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:09,946 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-02-13 21:55:09,966 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-02-13 21:55:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-02-13 21:55:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-02-13 21:55:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-02-13 21:55:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-02-13 21:55:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-02-13 21:55:09,986 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-02-13 21:55:09,986 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-02-13 21:55:09,987 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-02-13 21:55:10,035 INFO L235 CfgBuilder]: Building ICFG [2023-02-13 21:55:10,037 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2023-02-13 21:55:10,182 INFO L276 CfgBuilder]: Performing block encoding [2023-02-13 21:55:10,186 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-02-13 21:55:10,186 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2023-02-13 21:55:10,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 09:55:10 BoogieIcfgContainer [2023-02-13 21:55:10,187 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-02-13 21:55:10,189 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-02-13 21:55:10,189 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2023-02-13 21:55:10,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2023-02-13 21:55:10,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.02 09:55:09" (1/3) ... [2023-02-13 21:55:10,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43dae713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 09:55:10, skipping insertion in model container [2023-02-13 21:55:10,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.02 09:55:09" (2/3) ... [2023-02-13 21:55:10,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43dae713 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.02 09:55:10, skipping insertion in model container [2023-02-13 21:55:10,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.02 09:55:10" (3/3) ... [2023-02-13 21:55:10,193 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_copy2_ground-2.i [2023-02-13 21:55:10,205 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-02-13 21:55:10,206 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-02-13 21:55:10,235 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-02-13 21:55:10,240 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;@3c08ef9a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-02-13 21:55:10,240 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-02-13 21:55:10,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:10,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-02-13 21:55:10,247 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:10,248 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:10,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:10,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:10,252 INFO L85 PathProgramCache]: Analyzing trace with hash -779788197, now seen corresponding path program 1 times [2023-02-13 21:55:10,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:10,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783041320] [2023-02-13 21:55:10,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:10,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:10,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:10,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:10,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783041320] [2023-02-13 21:55:10,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783041320] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:10,540 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-02-13 21:55:10,540 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-02-13 21:55:10,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849968758] [2023-02-13 21:55:10,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:10,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 21:55:10,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:10,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 21:55:10,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 21:55:10,597 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:10,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:10,646 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2023-02-13 21:55:10,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 21:55:10,648 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-02-13 21:55:10,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:10,653 INFO L225 Difference]: With dead ends: 40 [2023-02-13 21:55:10,654 INFO L226 Difference]: Without dead ends: 19 [2023-02-13 21:55:10,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-02-13 21:55:10,665 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:10,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:10,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-02-13 21:55:10,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-02-13 21:55:10,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:10,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2023-02-13 21:55:10,704 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2023-02-13 21:55:10,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:10,705 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2023-02-13 21:55:10,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:10,705 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2023-02-13 21:55:10,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-02-13 21:55:10,706 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:10,706 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:10,706 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-02-13 21:55:10,707 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:10,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:10,709 INFO L85 PathProgramCache]: Analyzing trace with hash 383923737, now seen corresponding path program 1 times [2023-02-13 21:55:10,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:10,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79009179] [2023-02-13 21:55:10,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:10,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:10,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:10,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-02-13 21:55:10,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:10,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79009179] [2023-02-13 21:55:10,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79009179] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:10,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138415902] [2023-02-13 21:55:10,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:10,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:10,855 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:10,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-02-13 21:55:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:10,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2023-02-13 21:55:10,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-02-13 21:55:10,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-02-13 21:55:10,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138415902] provided 1 perfect and 0 imperfect interpolant sequences [2023-02-13 21:55:10,946 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-02-13 21:55:10,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-02-13 21:55:10,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871233097] [2023-02-13 21:55:10,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-02-13 21:55:10,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-02-13 21:55:10,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:10,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-02-13 21:55:10,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-13 21:55:10,952 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:10,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:10,976 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2023-02-13 21:55:10,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-02-13 21:55:10,977 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-02-13 21:55:10,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:10,979 INFO L225 Difference]: With dead ends: 32 [2023-02-13 21:55:10,980 INFO L226 Difference]: Without dead ends: 22 [2023-02-13 21:55:10,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-02-13 21:55:10,981 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:10,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 27 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:10,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-02-13 21:55:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2023-02-13 21:55:10,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-02-13 21:55:10,988 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 13 [2023-02-13 21:55:10,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:10,989 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-02-13 21:55:10,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:10,989 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-02-13 21:55:10,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-02-13 21:55:10,990 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:10,990 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:10,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-02-13 21:55:11,195 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 [2023-02-13 21:55:11,197 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,199 INFO L85 PathProgramCache]: Analyzing trace with hash 1602849365, now seen corresponding path program 1 times [2023-02-13 21:55:11,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310509592] [2023-02-13 21:55:11,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-13 21:55:11,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310509592] [2023-02-13 21:55:11,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310509592] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:11,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919215726] [2023-02-13 21:55:11,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:11,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:11,304 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:11,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-02-13 21:55:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-13 21:55:11,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:11,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-13 21:55:11,448 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:11,486 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-02-13 21:55:11,486 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919215726] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:11,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:11,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-13 21:55:11,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475404521] [2023-02-13 21:55:11,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 21:55:11,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 21:55:11,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-13 21:55:11,489 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:11,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:11,538 INFO L93 Difference]: Finished difference Result 41 states and 49 transitions. [2023-02-13 21:55:11,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 21:55:11,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-02-13 21:55:11,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:11,539 INFO L225 Difference]: With dead ends: 41 [2023-02-13 21:55:11,539 INFO L226 Difference]: Without dead ends: 26 [2023-02-13 21:55:11,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-13 21:55:11,541 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:11,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:11,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-02-13 21:55:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-02-13 21:55:11,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-02-13 21:55:11,550 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 17 [2023-02-13 21:55:11,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:11,550 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-02-13 21:55:11,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-02-13 21:55:11,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-02-13 21:55:11,553 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,553 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:11,573 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:11,757 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 [2023-02-13 21:55:11,758 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:11,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:11,758 INFO L85 PathProgramCache]: Analyzing trace with hash 862458255, now seen corresponding path program 2 times [2023-02-13 21:55:11,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:11,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284880367] [2023-02-13 21:55:11,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:11,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:11,865 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:55:11,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:11,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284880367] [2023-02-13 21:55:11,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284880367] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:11,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017268730] [2023-02-13 21:55:11,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:55:11,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:11,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:11,880 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:11,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-02-13 21:55:11,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 21:55:11,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:11,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2023-02-13 21:55:11,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:11,939 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:55:11,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:11,952 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-02-13 21:55:11,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017268730] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:11,953 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:11,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-02-13 21:55:11,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022169599] [2023-02-13 21:55:11,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:11,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-02-13 21:55:11,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:11,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-02-13 21:55:11,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-13 21:55:11,955 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:11,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:11,986 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2023-02-13 21:55:11,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-02-13 21:55:11,986 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-02-13 21:55:11,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:11,987 INFO L225 Difference]: With dead ends: 49 [2023-02-13 21:55:11,987 INFO L226 Difference]: Without dead ends: 38 [2023-02-13 21:55:11,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2023-02-13 21:55:11,988 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:11,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 60 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:11,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-02-13 21:55:11,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-02-13 21:55:11,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:11,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-02-13 21:55:11,991 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 23 [2023-02-13 21:55:11,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:11,992 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-02-13 21:55:11,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:11,992 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-02-13 21:55:11,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-02-13 21:55:11,993 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:11,993 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:12,009 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:12,200 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 [2023-02-13 21:55:12,200 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:12,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:12,201 INFO L85 PathProgramCache]: Analyzing trace with hash -1441156285, now seen corresponding path program 3 times [2023-02-13 21:55:12,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:12,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928290128] [2023-02-13 21:55:12,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:12,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-13 21:55:12,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:12,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928290128] [2023-02-13 21:55:12,363 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928290128] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:12,363 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430797226] [2023-02-13 21:55:12,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 21:55:12,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:12,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:12,364 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:12,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-02-13 21:55:12,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2023-02-13 21:55:12,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:12,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 21:55:12,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:12,474 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-13 21:55:12,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:12,524 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-13 21:55:12,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430797226] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:12,524 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:12,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-02-13 21:55:12,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173740855] [2023-02-13 21:55:12,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:12,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-02-13 21:55:12,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:12,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-02-13 21:55:12,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-13 21:55:12,527 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:12,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:12,559 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2023-02-13 21:55:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-02-13 21:55:12,560 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-02-13 21:55:12,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:12,560 INFO L225 Difference]: With dead ends: 77 [2023-02-13 21:55:12,560 INFO L226 Difference]: Without dead ends: 50 [2023-02-13 21:55:12,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2023-02-13 21:55:12,561 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:12,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-02-13 21:55:12,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2023-02-13 21:55:12,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:12,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2023-02-13 21:55:12,566 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 35 [2023-02-13 21:55:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:12,566 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2023-02-13 21:55:12,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 13 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2023-02-13 21:55:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-02-13 21:55:12,567 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:12,567 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:12,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:12,772 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 [2023-02-13 21:55:12,772 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:12,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:12,773 INFO L85 PathProgramCache]: Analyzing trace with hash -100034249, now seen corresponding path program 4 times [2023-02-13 21:55:12,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:12,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235090365] [2023-02-13 21:55:12,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:12,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-13 21:55:12,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:12,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235090365] [2023-02-13 21:55:12,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235090365] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:12,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728169822] [2023-02-13 21:55:12,930 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 21:55:12,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:12,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:12,944 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:12,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-02-13 21:55:13,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 21:55:13,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:13,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-13 21:55:13,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-13 21:55:13,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:13,201 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-13 21:55:13,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728169822] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:13,202 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:13,202 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2023-02-13 21:55:13,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63357529] [2023-02-13 21:55:13,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:13,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-02-13 21:55:13,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:13,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-02-13 21:55:13,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-13 21:55:13,204 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:13,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:13,255 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2023-02-13 21:55:13,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-02-13 21:55:13,256 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-02-13 21:55:13,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:13,256 INFO L225 Difference]: With dead ends: 101 [2023-02-13 21:55:13,257 INFO L226 Difference]: Without dead ends: 74 [2023-02-13 21:55:13,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2023-02-13 21:55:13,257 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:13,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-02-13 21:55:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-02-13 21:55:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2023-02-13 21:55:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 77 transitions. [2023-02-13 21:55:13,262 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 77 transitions. Word has length 47 [2023-02-13 21:55:13,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:13,263 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 77 transitions. [2023-02-13 21:55:13,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 77 transitions. [2023-02-13 21:55:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-02-13 21:55:13,264 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:13,264 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:13,272 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-02-13 21:55:13,468 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 [2023-02-13 21:55:13,469 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:13,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:13,469 INFO L85 PathProgramCache]: Analyzing trace with hash -888767713, now seen corresponding path program 5 times [2023-02-13 21:55:13,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:13,469 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719534846] [2023-02-13 21:55:13,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:13,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:13,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:13,910 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-02-13 21:55:13,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719534846] [2023-02-13 21:55:13,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719534846] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:13,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140926974] [2023-02-13 21:55:13,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 21:55:13,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:13,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:13,912 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:13,914 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-02-13 21:55:23,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2023-02-13 21:55:23,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:23,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 6 conjunts are in the unsatisfiable core [2023-02-13 21:55:23,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:23,280 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2023-02-13 21:55:23,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:23,373 INFO L134 CoverageAnalysis]: Checked inductivity of 516 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 500 trivial. 0 not checked. [2023-02-13 21:55:23,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140926974] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:23,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:23,374 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 7, 7] total 35 [2023-02-13 21:55:23,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124344525] [2023-02-13 21:55:23,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:23,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-02-13 21:55:23,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:23,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-02-13 21:55:23,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2023-02-13 21:55:23,376 INFO L87 Difference]: Start difference. First operand 74 states and 77 transitions. Second operand has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:23,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:23,487 INFO L93 Difference]: Finished difference Result 128 states and 146 transitions. [2023-02-13 21:55:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-02-13 21:55:23,488 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-02-13 21:55:23,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:23,489 INFO L225 Difference]: With dead ends: 128 [2023-02-13 21:55:23,489 INFO L226 Difference]: Without dead ends: 101 [2023-02-13 21:55:23,489 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2023-02-13 21:55:23,490 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 26 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:23,490 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 68 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:23,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2023-02-13 21:55:23,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2023-02-13 21:55:23,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:23,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2023-02-13 21:55:23,496 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 71 [2023-02-13 21:55:23,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:23,496 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2023-02-13 21:55:23,496 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.4857142857142858) internal successors, (87), 35 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:23,496 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2023-02-13 21:55:23,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2023-02-13 21:55:23,497 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:23,497 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:23,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:23,706 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 [2023-02-13 21:55:23,707 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:23,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash -2043147451, now seen corresponding path program 6 times [2023-02-13 21:55:23,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:23,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485388278] [2023-02-13 21:55:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:23,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2023-02-13 21:55:24,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:24,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485388278] [2023-02-13 21:55:24,209 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485388278] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:24,209 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849454419] [2023-02-13 21:55:24,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-02-13 21:55:24,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:24,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:24,224 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:24,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-02-13 21:55:42,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-02-13 21:55:42,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:42,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 12 conjunts are in the unsatisfiable core [2023-02-13 21:55:42,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2023-02-13 21:55:42,299 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:42,527 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 629 trivial. 0 not checked. [2023-02-13 21:55:42,527 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849454419] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:42,528 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:42,528 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 13, 13] total 48 [2023-02-13 21:55:42,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345096428] [2023-02-13 21:55:42,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:42,528 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-02-13 21:55:42,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:42,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-02-13 21:55:42,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2023-02-13 21:55:42,530 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:42,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:42,692 INFO L93 Difference]: Finished difference Result 202 states and 232 transitions. [2023-02-13 21:55:42,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-02-13 21:55:42,693 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2023-02-13 21:55:42,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:42,694 INFO L225 Difference]: With dead ends: 202 [2023-02-13 21:55:42,694 INFO L226 Difference]: Without dead ends: 151 [2023-02-13 21:55:42,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=600, Invalid=1656, Unknown=0, NotChecked=0, Total=2256 [2023-02-13 21:55:42,696 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 50 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:42,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 86 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:42,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-02-13 21:55:42,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2023-02-13 21:55:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0268456375838926) internal successors, (153), 149 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2023-02-13 21:55:42,716 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 97 [2023-02-13 21:55:42,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:42,718 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2023-02-13 21:55:42,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 48 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:42,718 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2023-02-13 21:55:42,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-02-13 21:55:42,723 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:42,723 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:42,744 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:42,935 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 [2023-02-13 21:55:42,935 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:42,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:42,935 INFO L85 PathProgramCache]: Analyzing trace with hash 163678547, now seen corresponding path program 7 times [2023-02-13 21:55:42,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:42,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232055892] [2023-02-13 21:55:42,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:42,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:43,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-13 21:55:43,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:43,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232055892] [2023-02-13 21:55:43,580 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232055892] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:43,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847814997] [2023-02-13 21:55:43,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-02-13 21:55:43,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:43,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:43,596 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:43,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-02-13 21:55:43,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:43,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 606 conjuncts, 26 conjunts are in the unsatisfiable core [2023-02-13 21:55:43,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:43,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-13 21:55:43,823 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1544 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-13 21:55:44,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847814997] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:44,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:44,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2023-02-13 21:55:44,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135844423] [2023-02-13 21:55:44,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:44,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-02-13 21:55:44,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:44,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-02-13 21:55:44,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-02-13 21:55:44,433 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:44,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:44,522 INFO L93 Difference]: Finished difference Result 301 states and 332 transitions. [2023-02-13 21:55:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-02-13 21:55:44,522 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2023-02-13 21:55:44,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:44,523 INFO L225 Difference]: With dead ends: 301 [2023-02-13 21:55:44,523 INFO L226 Difference]: Without dead ends: 202 [2023-02-13 21:55:44,524 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2023-02-13 21:55:44,524 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:44,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-02-13 21:55:44,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-02-13 21:55:44,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2023-02-13 21:55:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 201 states have (on average 1.0199004975124377) internal successors, (205), 201 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:44,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 205 transitions. [2023-02-13 21:55:44,537 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 205 transitions. Word has length 147 [2023-02-13 21:55:44,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:44,537 INFO L495 AbstractCegarLoop]: Abstraction has 202 states and 205 transitions. [2023-02-13 21:55:44,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.188679245283019) internal successors, (116), 53 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:44,537 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 205 transitions. [2023-02-13 21:55:44,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-02-13 21:55:44,539 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:44,539 INFO L195 NwaCegarLoop]: trace histogram [50, 50, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:44,546 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:44,747 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 [2023-02-13 21:55:44,747 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:44,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:44,748 INFO L85 PathProgramCache]: Analyzing trace with hash -776127201, now seen corresponding path program 8 times [2023-02-13 21:55:44,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:44,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833427232] [2023-02-13 21:55:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:44,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:44,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:46,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-13 21:55:46,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:46,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833427232] [2023-02-13 21:55:46,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833427232] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:46,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351741374] [2023-02-13 21:55:46,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-02-13 21:55:46,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:46,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:46,428 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:46,437 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-02-13 21:55:46,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-02-13 21:55:46,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:55:46,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 52 conjunts are in the unsatisfiable core [2023-02-13 21:55:46,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:55:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-13 21:55:46,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:55:49,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3468 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-13 21:55:49,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351741374] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:55:49,085 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:55:49,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 105 [2023-02-13 21:55:49,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777141575] [2023-02-13 21:55:49,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:55:49,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-02-13 21:55:49,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:55:49,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-02-13 21:55:49,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-02-13 21:55:49,091 INFO L87 Difference]: Start difference. First operand 202 states and 205 transitions. Second operand has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:55:49,312 INFO L93 Difference]: Finished difference Result 405 states and 462 transitions. [2023-02-13 21:55:49,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-02-13 21:55:49,312 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2023-02-13 21:55:49,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:55:49,314 INFO L225 Difference]: With dead ends: 405 [2023-02-13 21:55:49,314 INFO L226 Difference]: Without dead ends: 306 [2023-02-13 21:55:49,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2023-02-13 21:55:49,319 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-02-13 21:55:49,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-02-13 21:55:49,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2023-02-13 21:55:49,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 306. [2023-02-13 21:55:49,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.0131147540983607) internal successors, (309), 305 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:49,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 309 transitions. [2023-02-13 21:55:49,330 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 309 transitions. Word has length 199 [2023-02-13 21:55:49,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:55:49,331 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 309 transitions. [2023-02-13 21:55:49,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0952380952380953) internal successors, (220), 105 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:55:49,331 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 309 transitions. [2023-02-13 21:55:49,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2023-02-13 21:55:49,333 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:55:49,333 INFO L195 NwaCegarLoop]: trace histogram [102, 102, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:55:49,349 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-02-13 21:55:49,540 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 [2023-02-13 21:55:49,540 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:55:49,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:55:49,541 INFO L85 PathProgramCache]: Analyzing trace with hash -148538697, now seen corresponding path program 9 times [2023-02-13 21:55:49,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:55:49,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686328112] [2023-02-13 21:55:49,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:55:49,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:55:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:55:54,324 INFO L134 CoverageAnalysis]: Checked inductivity of 11372 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2023-02-13 21:55:54,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:55:54,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686328112] [2023-02-13 21:55:54,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686328112] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:55:54,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453525373] [2023-02-13 21:55:54,325 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-02-13 21:55:54,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:55:54,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:55:54,326 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:55:54,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-02-13 21:56:32,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-02-13 21:56:32,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:56:32,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 588 conjuncts, 24 conjunts are in the unsatisfiable core [2023-02-13 21:56:32,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:56:33,177 INFO L134 CoverageAnalysis]: Checked inductivity of 11372 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10888 trivial. 0 not checked. [2023-02-13 21:56:33,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:56:34,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11372 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 10888 trivial. 0 not checked. [2023-02-13 21:56:34,294 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453525373] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:56:34,294 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:56:34,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 25, 25] total 151 [2023-02-13 21:56:34,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940795362] [2023-02-13 21:56:34,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:56:34,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2023-02-13 21:56:34,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:56:34,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2023-02-13 21:56:34,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6587, Invalid=16063, Unknown=0, NotChecked=0, Total=22650 [2023-02-13 21:56:34,302 INFO L87 Difference]: Start difference. First operand 306 states and 309 transitions. Second operand has 151 states, 151 states have (on average 2.1125827814569536) internal successors, (319), 151 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:56:34,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:56:34,768 INFO L93 Difference]: Finished difference Result 504 states and 558 transitions. [2023-02-13 21:56:34,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-02-13 21:56:34,769 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 2.1125827814569536) internal successors, (319), 151 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 303 [2023-02-13 21:56:34,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:56:34,770 INFO L225 Difference]: With dead ends: 504 [2023-02-13 21:56:34,770 INFO L226 Difference]: Without dead ends: 405 [2023-02-13 21:56:34,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 709 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4692 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=6587, Invalid=16063, Unknown=0, NotChecked=0, Total=22650 [2023-02-13 21:56:34,773 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 157 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 449 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 21:56:34,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 128 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 449 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 21:56:34,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2023-02-13 21:56:34,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 404. [2023-02-13 21:56:34,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 1.0099255583126552) internal successors, (407), 403 states have internal predecessors, (407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:56:34,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 407 transitions. [2023-02-13 21:56:34,781 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 407 transitions. Word has length 303 [2023-02-13 21:56:34,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:56:34,781 INFO L495 AbstractCegarLoop]: Abstraction has 404 states and 407 transitions. [2023-02-13 21:56:34,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 2.1125827814569536) internal successors, (319), 151 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:56:34,782 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 407 transitions. [2023-02-13 21:56:34,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2023-02-13 21:56:34,785 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:56:34,785 INFO L195 NwaCegarLoop]: trace histogram [103, 103, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:56:34,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-02-13 21:56:35,000 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 [2023-02-13 21:56:35,001 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:56:35,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:56:35,001 INFO L85 PathProgramCache]: Analyzing trace with hash 521897749, now seen corresponding path program 10 times [2023-02-13 21:56:35,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:56:35,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240874210] [2023-02-13 21:56:35,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:56:35,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:56:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:56:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 14841 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2023-02-13 21:56:40,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:56:40,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240874210] [2023-02-13 21:56:40,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240874210] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:56:40,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289016580] [2023-02-13 21:56:40,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-02-13 21:56:40,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:56:40,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:56:40,208 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:56:40,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-02-13 21:56:40,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-02-13 21:56:40,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-02-13 21:56:40,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 1653 conjuncts, 105 conjunts are in the unsatisfiable core [2023-02-13 21:56:40,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2023-02-13 21:56:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14841 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2023-02-13 21:56:40,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2023-02-13 21:56:46,935 INFO L134 CoverageAnalysis]: Checked inductivity of 14841 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2023-02-13 21:56:46,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289016580] provided 0 perfect and 2 imperfect interpolant sequences [2023-02-13 21:56:46,935 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-02-13 21:56:46,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106, 106] total 211 [2023-02-13 21:56:46,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680686114] [2023-02-13 21:56:46,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-02-13 21:56:46,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2023-02-13 21:56:46,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-02-13 21:56:46,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2023-02-13 21:56:46,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2023-02-13 21:56:46,947 INFO L87 Difference]: Start difference. First operand 404 states and 407 transitions. Second operand has 211 states, 211 states have (on average 2.0473933649289098) internal successors, (432), 211 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:56:47,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-02-13 21:56:47,562 INFO L93 Difference]: Finished difference Result 809 states and 919 transitions. [2023-02-13 21:56:47,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 210 states. [2023-02-13 21:56:47,563 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 2.0473933649289098) internal successors, (432), 211 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 401 [2023-02-13 21:56:47,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-02-13 21:56:47,565 INFO L225 Difference]: With dead ends: 809 [2023-02-13 21:56:47,565 INFO L226 Difference]: Without dead ends: 614 [2023-02-13 21:56:47,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 906 GetRequests, 697 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=22155, Invalid=22155, Unknown=0, NotChecked=0, Total=44310 [2023-02-13 21:56:47,569 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 2 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 420 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-02-13 21:56:47,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 66 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 420 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-02-13 21:56:47,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2023-02-13 21:56:47,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 614. [2023-02-13 21:56:47,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.0065252854812399) internal successors, (617), 613 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:56:47,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 617 transitions. [2023-02-13 21:56:47,582 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 617 transitions. Word has length 401 [2023-02-13 21:56:47,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-02-13 21:56:47,583 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 617 transitions. [2023-02-13 21:56:47,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 2.0473933649289098) internal successors, (432), 211 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-02-13 21:56:47,583 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 617 transitions. [2023-02-13 21:56:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2023-02-13 21:56:47,587 INFO L187 NwaCegarLoop]: Found error trace [2023-02-13 21:56:47,587 INFO L195 NwaCegarLoop]: trace histogram [208, 208, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-02-13 21:56:47,611 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-02-13 21:56:47,812 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 [2023-02-13 21:56:47,812 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-02-13 21:56:47,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2023-02-13 21:56:47,813 INFO L85 PathProgramCache]: Analyzing trace with hash -1397788285, now seen corresponding path program 11 times [2023-02-13 21:56:47,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-02-13 21:56:47,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529407432] [2023-02-13 21:56:47,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-02-13 21:56:47,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-02-13 21:56:48,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-02-13 21:57:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 47496 backedges. 0 proven. 43264 refuted. 0 times theorem prover too weak. 4232 trivial. 0 not checked. [2023-02-13 21:57:06,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-02-13 21:57:06,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529407432] [2023-02-13 21:57:06,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529407432] provided 0 perfect and 1 imperfect interpolant sequences [2023-02-13 21:57:06,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610027070] [2023-02-13 21:57:06,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-02-13 21:57:06,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-02-13 21:57:06,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-02-13 21:57:06,682 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-02-13 21:57:06,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process