./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pnr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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-tiling/pnr4.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 10:10:51,935 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 10:10:51,936 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 10:10:51,961 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 10:10:51,964 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 10:10:51,965 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 10:10:51,969 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 10:10:51,974 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 10:10:51,976 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 10:10:51,980 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 10:10:51,981 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 10:10:51,983 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 10:10:51,984 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 10:10:51,985 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 10:10:51,987 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 10:10:51,988 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 10:10:51,989 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 10:10:51,990 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 10:10:51,993 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 10:10:51,998 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 10:10:52,000 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 10:10:52,001 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 10:10:52,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 10:10:52,002 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 10:10:52,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 10:10:52,010 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 10:10:52,010 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 10:10:52,011 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 10:10:52,012 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 10:10:52,013 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 10:10:52,014 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 10:10:52,014 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 10:10:52,015 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 10:10:52,016 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 10:10:52,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 10:10:52,018 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 10:10:52,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 10:10:52,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 10:10:52,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 10:10:52,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 10:10:52,020 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 10:10:52,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 10:10:52,022 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 10:10:52,055 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 10:10:52,055 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 10:10:52,056 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 10:10:52,056 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 10:10:52,056 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 10:10:52,057 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 10:10:52,057 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 10:10:52,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 10:10:52,057 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 10:10:52,058 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 10:10:52,058 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 10:10:52,059 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 10:10:52,059 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 10:10:52,059 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 10:10:52,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 10:10:52,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 10:10:52,060 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 10:10:52,060 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 10:10:52,060 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 10:10:52,060 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 10:10:52,060 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 10:10:52,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 10:10:52,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 10:10:52,061 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 10:10:52,061 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:10:52,061 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 10:10:52,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 10:10:52,062 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 10:10:52,062 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 10:10:52,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 10:10:52,062 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 10:10:52,063 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 10:10:52,063 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 10:10:52,063 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c2f943c7ce97bf9be3e11b9d2df150d740ebe8f456342884d8ad0d40610fb008 [2022-07-13 10:10:52,298 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 10:10:52,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 10:10:52,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 10:10:52,319 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 10:10:52,319 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 10:10:52,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pnr4.c [2022-07-13 10:10:52,373 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a367681a5/f00c8d19a75348a49deef3fd5a32fa26/FLAGc749ab966 [2022-07-13 10:10:52,703 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 10:10:52,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pnr4.c [2022-07-13 10:10:52,712 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a367681a5/f00c8d19a75348a49deef3fd5a32fa26/FLAGc749ab966 [2022-07-13 10:10:53,105 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a367681a5/f00c8d19a75348a49deef3fd5a32fa26 [2022-07-13 10:10:53,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 10:10:53,109 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 10:10:53,112 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 10:10:53,112 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 10:10:53,115 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 10:10:53,115 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:10:53" (1/1) ... [2022-07-13 10:10:53,116 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69075645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:53, skipping insertion in model container [2022-07-13 10:10:53,116 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:10:53" (1/1) ... [2022-07-13 10:10:53,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 10:10:53,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 10:10:53,265 WARN L230 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-tiling/pnr4.c[395,408] [2022-07-13 10:10:53,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:10:53,303 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 10:10:53,320 WARN L230 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-tiling/pnr4.c[395,408] [2022-07-13 10:10:53,334 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 10:10:53,344 INFO L208 MainTranslator]: Completed translation [2022-07-13 10:10:53,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:53 WrapperNode [2022-07-13 10:10:53,345 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 10:10:53,346 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 10:10:53,346 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 10:10:53,346 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 10:10:53,351 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:53" (1/1) ... [2022-07-13 10:10:53,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:53" (1/1) ... [2022-07-13 10:10:53,373 INFO L137 Inliner]: procedures = 17, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 91 [2022-07-13 10:10:53,374 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 10:10:53,375 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 10:10:53,375 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 10:10:53,375 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 10:10:53,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:53" (1/1) ... [2022-07-13 10:10:53,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:53" (1/1) ... [2022-07-13 10:10:53,384 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:53" (1/1) ... [2022-07-13 10:10:53,388 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:53" (1/1) ... [2022-07-13 10:10:53,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:53" (1/1) ... [2022-07-13 10:10:53,396 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:53" (1/1) ... [2022-07-13 10:10:53,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:53" (1/1) ... [2022-07-13 10:10:53,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 10:10:53,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 10:10:53,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 10:10:53,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 10:10:53,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:53" (1/1) ... [2022-07-13 10:10:53,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 10:10:53,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:53,427 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) [2022-07-13 10:10:53,442 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 [2022-07-13 10:10:53,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 10:10:53,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 10:10:53,462 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 10:10:53,462 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 10:10:53,462 INFO L130 BoogieDeclarations]: Found specification of procedure ReadFromPort [2022-07-13 10:10:53,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ReadFromPort [2022-07-13 10:10:53,463 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 10:10:53,463 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 10:10:53,463 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 10:10:53,515 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 10:10:53,516 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 10:10:53,654 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 10:10:53,660 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 10:10:53,660 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-13 10:10:53,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:10:53 BoogieIcfgContainer [2022-07-13 10:10:53,662 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 10:10:53,663 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 10:10:53,663 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 10:10:53,682 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 10:10:53,682 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:10:53" (1/3) ... [2022-07-13 10:10:53,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c39c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:10:53, skipping insertion in model container [2022-07-13 10:10:53,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:10:53" (2/3) ... [2022-07-13 10:10:53,683 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63c39c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:10:53, skipping insertion in model container [2022-07-13 10:10:53,683 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:10:53" (3/3) ... [2022-07-13 10:10:53,684 INFO L111 eAbstractionObserver]: Analyzing ICFG pnr4.c [2022-07-13 10:10:53,695 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 10:10:53,695 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 10:10:53,733 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 10:10:53,752 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@7f8b9dab, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@435cf01e [2022-07-13 10:10:53,753 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 10:10:53,756 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 10:10:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-07-13 10:10:53,766 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:53,766 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:53,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:53,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1807585031, now seen corresponding path program 1 times [2022-07-13 10:10:53,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:53,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147386475] [2022-07-13 10:10:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:53,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:54,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 10:10:54,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:54,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147386475] [2022-07-13 10:10:54,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147386475] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 10:10:54,128 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 10:10:54,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-13 10:10:54,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249339497] [2022-07-13 10:10:54,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 10:10:54,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-13 10:10:54,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:54,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-13 10:10:54,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:10:54,167 INFO L87 Difference]: Start difference. First operand has 34 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 28 states have internal predecessors, (40), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2022-07-13 10:10:54,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:54,319 INFO L93 Difference]: Finished difference Result 84 states and 117 transitions. [2022-07-13 10:10:54,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 10:10:54,321 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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 [2022-07-13 10:10:54,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:54,330 INFO L225 Difference]: With dead ends: 84 [2022-07-13 10:10:54,331 INFO L226 Difference]: Without dead ends: 44 [2022-07-13 10:10:54,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-13 10:10:54,338 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:54,339 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 52 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-13 10:10:54,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-13 10:10:54,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 31. [2022-07-13 10:10:54,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-13 10:10:54,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-07-13 10:10:54,394 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 11 [2022-07-13 10:10:54,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:54,395 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-07-13 10:10:54,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 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) [2022-07-13 10:10:54,396 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-07-13 10:10:54,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 10:10:54,399 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:54,400 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:54,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 10:10:54,400 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:54,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:54,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1998588124, now seen corresponding path program 1 times [2022-07-13 10:10:54,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:54,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635275032] [2022-07-13 10:10:54,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:54,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:54,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:54,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:54,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:10:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:54,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:10:54,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:10:54,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:54,785 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635275032] [2022-07-13 10:10:54,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635275032] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:54,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016163088] [2022-07-13 10:10:54,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:54,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:54,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:54,796 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) [2022-07-13 10:10:54,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 10:10:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:54,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 10:10:54,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:54,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:10:55,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:10:55,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-13 10:10:55,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:10:55,062 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-13 10:10:55,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:10:55,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 41 [2022-07-13 10:10:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:10:55,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:55,339 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-13 10:10:55,342 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 22 [2022-07-13 10:10:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:10:55,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2016163088] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:55,359 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:55,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 13 [2022-07-13 10:10:55,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710205646] [2022-07-13 10:10:55,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:55,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 10:10:55,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:55,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 10:10:55,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2022-07-13 10:10:55,362 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 10:10:55,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:55,704 INFO L93 Difference]: Finished difference Result 102 states and 141 transitions. [2022-07-13 10:10:55,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 10:10:55,704 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 37 [2022-07-13 10:10:55,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:55,708 INFO L225 Difference]: With dead ends: 102 [2022-07-13 10:10:55,708 INFO L226 Difference]: Without dead ends: 100 [2022-07-13 10:10:55,709 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 74 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:10:55,710 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 96 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:55,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 313 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:10:55,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-07-13 10:10:55,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 48. [2022-07-13 10:10:55,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 8 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-13 10:10:55,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2022-07-13 10:10:55,736 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 37 [2022-07-13 10:10:55,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:55,737 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2022-07-13 10:10:55,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 13 states have internal predecessors, (45), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 10:10:55,737 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2022-07-13 10:10:55,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-13 10:10:55,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:55,739 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:55,767 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:55,955 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 [2022-07-13 10:10:55,956 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:55,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:55,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1858039514, now seen corresponding path program 1 times [2022-07-13 10:10:55,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:55,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762802218] [2022-07-13 10:10:55,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:55,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:55,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:56,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:56,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:56,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:56,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:10:56,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:56,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:10:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:56,219 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:10:56,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:56,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762802218] [2022-07-13 10:10:56,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762802218] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:56,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784186801] [2022-07-13 10:10:56,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:56,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:56,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:56,222 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) [2022-07-13 10:10:56,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 10:10:56,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:56,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 10:10:56,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:56,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:10:56,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:10:56,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:10:56,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:10:56,534 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:10:56,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:10:56,595 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-13 10:10:56,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 10:10:56,676 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:10:56,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:57,629 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2022-07-13 10:10:57,632 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2022-07-13 10:10:57,687 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:10:57,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784186801] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:57,688 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:57,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 7] total 19 [2022-07-13 10:10:57,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798390994] [2022-07-13 10:10:57,688 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:57,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 10:10:57,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:57,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 10:10:57,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:10:57,690 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 10:10:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:58,675 INFO L93 Difference]: Finished difference Result 172 states and 236 transitions. [2022-07-13 10:10:58,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 10:10:58,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 37 [2022-07-13 10:10:58,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:58,678 INFO L225 Difference]: With dead ends: 172 [2022-07-13 10:10:58,678 INFO L226 Difference]: Without dead ends: 170 [2022-07-13 10:10:58,679 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 65 SyntacticMatches, 10 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=334, Invalid=1558, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 10:10:58,680 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 187 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 501 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 87 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:58,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [191 Valid, 501 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 545 Invalid, 0 Unknown, 87 Unchecked, 0.4s Time] [2022-07-13 10:10:58,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-13 10:10:58,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 75. [2022-07-13 10:10:58,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 57 states have internal predecessors, (75), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-13 10:10:58,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 107 transitions. [2022-07-13 10:10:58,698 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 107 transitions. Word has length 37 [2022-07-13 10:10:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:58,699 INFO L495 AbstractCegarLoop]: Abstraction has 75 states and 107 transitions. [2022-07-13 10:10:58,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.1578947368421053) internal successors, (60), 19 states have internal predecessors, (60), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 10:10:58,699 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 107 transitions. [2022-07-13 10:10:58,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 10:10:58,700 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:58,700 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:58,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 10:10:58,919 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 [2022-07-13 10:10:58,920 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:10:58,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:10:58,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1526874982, now seen corresponding path program 1 times [2022-07-13 10:10:58,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:10:58,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324749098] [2022-07-13 10:10:58,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:58,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:10:58,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:59,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:10:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:59,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:10:59,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:59,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:10:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:59,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:10:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:10:59,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:10:59,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324749098] [2022-07-13 10:10:59,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324749098] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:10:59,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402367992] [2022-07-13 10:10:59,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:10:59,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:10:59,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:10:59,106 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) [2022-07-13 10:10:59,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 10:10:59,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:10:59,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-13 10:10:59,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:10:59,224 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:10:59,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:10:59,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 29 [2022-07-13 10:10:59,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:10:59,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:10:59,318 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:10:59,318 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:10:59,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:10:59,410 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-13 10:10:59,432 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:10:59,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402367992] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:10:59,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:10:59,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 13 [2022-07-13 10:10:59,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309243009] [2022-07-13 10:10:59,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:10:59,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-13 10:10:59,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:10:59,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-13 10:10:59,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2022-07-13 10:10:59,435 INFO L87 Difference]: Start difference. First operand 75 states and 107 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 10:10:59,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:10:59,871 INFO L93 Difference]: Finished difference Result 262 states and 392 transitions. [2022-07-13 10:10:59,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-13 10:10:59,872 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2022-07-13 10:10:59,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:10:59,874 INFO L225 Difference]: With dead ends: 262 [2022-07-13 10:10:59,874 INFO L226 Difference]: Without dead ends: 260 [2022-07-13 10:10:59,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 81 SyntacticMatches, 7 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-13 10:10:59,875 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 95 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:10:59,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 362 Invalid, 529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-13 10:10:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-13 10:10:59,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 125. [2022-07-13 10:10:59,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 94 states have (on average 1.372340425531915) internal successors, (129), 95 states have internal predecessors, (129), 28 states have call successors, (28), 2 states have call predecessors, (28), 2 states have return successors, (28), 27 states have call predecessors, (28), 28 states have call successors, (28) [2022-07-13 10:10:59,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 185 transitions. [2022-07-13 10:10:59,899 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 185 transitions. Word has length 41 [2022-07-13 10:10:59,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:10:59,899 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 185 transitions. [2022-07-13 10:10:59,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 10:10:59,900 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 185 transitions. [2022-07-13 10:10:59,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-13 10:10:59,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:10:59,901 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:10:59,926 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:00,123 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 [2022-07-13 10:11:00,124 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:00,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:00,124 INFO L85 PathProgramCache]: Analyzing trace with hash 962653980, now seen corresponding path program 1 times [2022-07-13 10:11:00,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:00,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211265329] [2022-07-13 10:11:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:00,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:00,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:00,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:00,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:00,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:00,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:00,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:11:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:00,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:00,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211265329] [2022-07-13 10:11:00,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211265329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:00,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546558416] [2022-07-13 10:11:00,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:00,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:00,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:00,299 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) [2022-07-13 10:11:00,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 10:11:00,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:00,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-13 10:11:00,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:00,444 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:11:00,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:00,513 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:11:00,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:00,568 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-13 10:11:00,663 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 10:11:00,684 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-13 10:11:00,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:01,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:11:01,227 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-13 10:11:01,297 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:01,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546558416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:01,297 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:01,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 20 [2022-07-13 10:11:01,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071321367] [2022-07-13 10:11:01,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:01,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:11:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:01,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:11:01,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2022-07-13 10:11:01,299 INFO L87 Difference]: Start difference. First operand 125 states and 185 transitions. Second operand has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 10:11:02,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:02,278 INFO L93 Difference]: Finished difference Result 366 states and 536 transitions. [2022-07-13 10:11:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 10:11:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 41 [2022-07-13 10:11:02,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:02,283 INFO L225 Difference]: With dead ends: 366 [2022-07-13 10:11:02,283 INFO L226 Difference]: Without dead ends: 364 [2022-07-13 10:11:02,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 75 SyntacticMatches, 9 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=320, Invalid=1486, Unknown=0, NotChecked=0, Total=1806 [2022-07-13 10:11:02,284 INFO L413 NwaCegarLoop]: 77 mSDtfsCounter, 187 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 83 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:02,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 630 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 733 Invalid, 0 Unknown, 83 Unchecked, 0.5s Time] [2022-07-13 10:11:02,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364 states. [2022-07-13 10:11:02,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364 to 181. [2022-07-13 10:11:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 132 states have (on average 1.4015151515151516) internal successors, (185), 135 states have internal predecessors, (185), 45 states have call successors, (45), 3 states have call predecessors, (45), 3 states have return successors, (45), 42 states have call predecessors, (45), 45 states have call successors, (45) [2022-07-13 10:11:02,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 275 transitions. [2022-07-13 10:11:02,332 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 275 transitions. Word has length 41 [2022-07-13 10:11:02,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:02,333 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 275 transitions. [2022-07-13 10:11:02,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.6) internal successors, (72), 20 states have internal predecessors, (72), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2022-07-13 10:11:02,333 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 275 transitions. [2022-07-13 10:11:02,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 10:11:02,343 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:02,343 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:02,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:02,567 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 [2022-07-13 10:11:02,567 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:02,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:02,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1227872016, now seen corresponding path program 2 times [2022-07-13 10:11:02,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:02,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16422151] [2022-07-13 10:11:02,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:02,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:02,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:02,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:02,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:02,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:02,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:02,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:11:02,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:02,675 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:02,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:02,675 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16422151] [2022-07-13 10:11:02,675 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16422151] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:02,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507694736] [2022-07-13 10:11:02,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:11:02,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:02,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:02,680 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) [2022-07-13 10:11:02,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-13 10:11:02,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:11:02,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:02,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 10:11:02,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:02,764 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:11:02,783 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:11:02,783 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:11:02,838 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:02,838 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:02,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:11:02,895 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-13 10:11:02,925 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:02,925 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507694736] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:02,925 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:02,925 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 12 [2022-07-13 10:11:02,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575295627] [2022-07-13 10:11:02,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:02,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 10:11:02,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:02,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 10:11:02,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-07-13 10:11:02,927 INFO L87 Difference]: Start difference. First operand 181 states and 275 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 10:11:03,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:03,679 INFO L93 Difference]: Finished difference Result 1228 states and 1937 transitions. [2022-07-13 10:11:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 10:11:03,680 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 45 [2022-07-13 10:11:03,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:03,687 INFO L225 Difference]: With dead ends: 1228 [2022-07-13 10:11:03,687 INFO L226 Difference]: Without dead ends: 1226 [2022-07-13 10:11:03,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2022-07-13 10:11:03,688 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 99 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 619 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:03,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 414 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-13 10:11:03,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1226 states. [2022-07-13 10:11:03,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1226 to 402. [2022-07-13 10:11:03,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 402 states, 294 states have (on average 1.435374149659864) internal successors, (422), 296 states have internal predecessors, (422), 104 states have call successors, (104), 3 states have call predecessors, (104), 3 states have return successors, (104), 102 states have call predecessors, (104), 104 states have call successors, (104) [2022-07-13 10:11:03,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 402 states to 402 states and 630 transitions. [2022-07-13 10:11:03,760 INFO L78 Accepts]: Start accepts. Automaton has 402 states and 630 transitions. Word has length 45 [2022-07-13 10:11:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:03,760 INFO L495 AbstractCegarLoop]: Abstraction has 402 states and 630 transitions. [2022-07-13 10:11:03,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 12 states have internal predecessors, (49), 3 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-13 10:11:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 402 states and 630 transitions. [2022-07-13 10:11:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-13 10:11:03,762 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:03,762 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:03,789 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:03,975 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 [2022-07-13 10:11:03,975 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:03,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:03,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1650573842, now seen corresponding path program 1 times [2022-07-13 10:11:03,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:03,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946409998] [2022-07-13 10:11:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:03,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:04,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:04,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:04,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:04,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:04,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:04,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:11:04,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:04,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:04,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946409998] [2022-07-13 10:11:04,083 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946409998] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:04,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513873127] [2022-07-13 10:11:04,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:04,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:04,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:04,085 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) [2022-07-13 10:11:04,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-13 10:11:04,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:04,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 10:11:04,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:04,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:11:04,284 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:11:04,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-13 10:11:04,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:11:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-07-13 10:11:04,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:06,522 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:11:06,524 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-13 10:11:06,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513873127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:06,557 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:11:06,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-13 10:11:06,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252489600] [2022-07-13 10:11:06,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:06,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 10:11:06,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:06,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 10:11:06,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=426, Unknown=1, NotChecked=0, Total=506 [2022-07-13 10:11:06,559 INFO L87 Difference]: Start difference. First operand 402 states and 630 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 10:11:07,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:07,350 INFO L93 Difference]: Finished difference Result 907 states and 1383 transitions. [2022-07-13 10:11:07,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-13 10:11:07,350 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 45 [2022-07-13 10:11:07,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:07,354 INFO L225 Difference]: With dead ends: 907 [2022-07-13 10:11:07,354 INFO L226 Difference]: Without dead ends: 905 [2022-07-13 10:11:07,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=328, Invalid=1833, Unknown=1, NotChecked=0, Total=2162 [2022-07-13 10:11:07,357 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 131 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 108 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:07,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 493 Invalid, 757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 505 Invalid, 0 Unknown, 108 Unchecked, 0.4s Time] [2022-07-13 10:11:07,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2022-07-13 10:11:07,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 462. [2022-07-13 10:11:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 334 states have (on average 1.437125748502994) internal successors, (480), 341 states have internal predecessors, (480), 122 states have call successors, (122), 5 states have call predecessors, (122), 5 states have return successors, (122), 115 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 10:11:07,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 724 transitions. [2022-07-13 10:11:07,424 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 724 transitions. Word has length 45 [2022-07-13 10:11:07,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:07,424 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 724 transitions. [2022-07-13 10:11:07,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 18 states have internal predecessors, (59), 4 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-13 10:11:07,424 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 724 transitions. [2022-07-13 10:11:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-13 10:11:07,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:07,426 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:07,448 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:07,639 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 [2022-07-13 10:11:07,640 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:07,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:07,640 INFO L85 PathProgramCache]: Analyzing trace with hash -112998778, now seen corresponding path program 3 times [2022-07-13 10:11:07,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:07,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885659704] [2022-07-13 10:11:07,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:07,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:07,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:07,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:07,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:07,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:07,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:07,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:11:07,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:07,797 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:07,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:07,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885659704] [2022-07-13 10:11:07,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [885659704] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:07,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375205784] [2022-07-13 10:11:07,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:11:07,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:07,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:07,804 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) [2022-07-13 10:11:07,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-13 10:11:07,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-13 10:11:07,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:07,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-13 10:11:07,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:07,904 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 10:11:07,999 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:08,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:08,066 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:11:08,068 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-13 10:11:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:08,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375205784] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:08,105 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:08,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 21 [2022-07-13 10:11:08,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482470018] [2022-07-13 10:11:08,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:08,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 10:11:08,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:08,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 10:11:08,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2022-07-13 10:11:08,107 INFO L87 Difference]: Start difference. First operand 462 states and 724 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:11:09,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:09,910 INFO L93 Difference]: Finished difference Result 3755 states and 5968 transitions. [2022-07-13 10:11:09,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-13 10:11:09,911 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-07-13 10:11:09,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:09,928 INFO L225 Difference]: With dead ends: 3755 [2022-07-13 10:11:09,928 INFO L226 Difference]: Without dead ends: 3753 [2022-07-13 10:11:09,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 93 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 925 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=2558, Unknown=0, NotChecked=0, Total=3080 [2022-07-13 10:11:09,932 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 220 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 1675 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 2102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 1675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:09,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 943 Invalid, 2102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 1675 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-13 10:11:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3753 states. [2022-07-13 10:11:10,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3753 to 1478. [2022-07-13 10:11:10,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1068 states have (on average 1.4691011235955056) internal successors, (1569), 1068 states have internal predecessors, (1569), 404 states have call successors, (404), 5 states have call predecessors, (404), 5 states have return successors, (404), 404 states have call predecessors, (404), 404 states have call successors, (404) [2022-07-13 10:11:10,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 2377 transitions. [2022-07-13 10:11:10,184 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 2377 transitions. Word has length 49 [2022-07-13 10:11:10,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:10,184 INFO L495 AbstractCegarLoop]: Abstraction has 1478 states and 2377 transitions. [2022-07-13 10:11:10,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 states have internal predecessors, (79), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:11:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 2377 transitions. [2022-07-13 10:11:10,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-07-13 10:11:10,188 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:10,188 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:10,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:10,407 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 [2022-07-13 10:11:10,407 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:10,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:10,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1801942520, now seen corresponding path program 1 times [2022-07-13 10:11:10,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:10,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690946316] [2022-07-13 10:11:10,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:10,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:10,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:10,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:10,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:10,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:10,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:11:10,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:10,631 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:10,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:10,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690946316] [2022-07-13 10:11:10,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690946316] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:10,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782113889] [2022-07-13 10:11:10,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:10,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:10,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:10,633 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) [2022-07-13 10:11:10,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-13 10:11:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:10,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 19 conjunts are in the unsatisfiable core [2022-07-13 10:11:10,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:10,812 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 10:11:10,955 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:11:10,974 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:10,975 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:11,063 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:11:11,065 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-13 10:11:11,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782113889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:11,106 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:11:11,106 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2022-07-13 10:11:11,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19635351] [2022-07-13 10:11:11,107 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:11,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-13 10:11:11,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:11,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-13 10:11:11,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-07-13 10:11:11,108 INFO L87 Difference]: Start difference. First operand 1478 states and 2377 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:11:12,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:12,531 INFO L93 Difference]: Finished difference Result 2639 states and 4171 transitions. [2022-07-13 10:11:12,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-13 10:11:12,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 49 [2022-07-13 10:11:12,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:12,541 INFO L225 Difference]: With dead ends: 2639 [2022-07-13 10:11:12,541 INFO L226 Difference]: Without dead ends: 2637 [2022-07-13 10:11:12,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=364, Invalid=1892, Unknown=0, NotChecked=0, Total=2256 [2022-07-13 10:11:12,545 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 231 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 299 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 760 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 299 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:12,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 760 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [299 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-13 10:11:12,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2637 states. [2022-07-13 10:11:12,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2637 to 486. [2022-07-13 10:11:12,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 358 states have (on average 1.4189944134078212) internal successors, (508), 365 states have internal predecessors, (508), 122 states have call successors, (122), 5 states have call predecessors, (122), 5 states have return successors, (122), 115 states have call predecessors, (122), 122 states have call successors, (122) [2022-07-13 10:11:12,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 752 transitions. [2022-07-13 10:11:12,671 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 752 transitions. Word has length 49 [2022-07-13 10:11:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:12,672 INFO L495 AbstractCegarLoop]: Abstraction has 486 states and 752 transitions. [2022-07-13 10:11:12,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 18 states have internal predecessors, (65), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:11:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 752 transitions. [2022-07-13 10:11:12,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-13 10:11:12,675 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:12,675 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:12,699 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:12,899 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 [2022-07-13 10:11:12,899 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:12,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:12,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1773729028, now seen corresponding path program 4 times [2022-07-13 10:11:12,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:12,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234319278] [2022-07-13 10:11:12,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:12,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:12,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:13,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:13,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:13,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:13,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:13,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:13,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:11:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:13,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:13,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234319278] [2022-07-13 10:11:13,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234319278] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:13,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706215461] [2022-07-13 10:11:13,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-13 10:11:13,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:13,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:13,128 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) [2022-07-13 10:11:13,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-13 10:11:13,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-13 10:11:13,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:13,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-13 10:11:13,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:13,505 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:13,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:13,696 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-13 10:11:13,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706215461] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:13,696 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:13,696 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 11] total 30 [2022-07-13 10:11:13,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505283433] [2022-07-13 10:11:13,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:13,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-13 10:11:13,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:13,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-13 10:11:13,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=644, Unknown=0, NotChecked=0, Total=870 [2022-07-13 10:11:13,698 INFO L87 Difference]: Start difference. First operand 486 states and 752 transitions. Second operand has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-13 10:11:14,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:14,113 INFO L93 Difference]: Finished difference Result 769 states and 1180 transitions. [2022-07-13 10:11:14,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-13 10:11:14,115 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) Word has length 53 [2022-07-13 10:11:14,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:14,118 INFO L225 Difference]: With dead ends: 769 [2022-07-13 10:11:14,119 INFO L226 Difference]: Without dead ends: 745 [2022-07-13 10:11:14,120 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=316, Invalid=874, Unknown=0, NotChecked=0, Total=1190 [2022-07-13 10:11:14,120 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 328 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 332 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:14,120 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [332 Valid, 151 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-13 10:11:14,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2022-07-13 10:11:14,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 519. [2022-07-13 10:11:14,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 390 states have (on average 1.405128205128205) internal successors, (548), 390 states have internal predecessors, (548), 123 states have call successors, (123), 5 states have call predecessors, (123), 5 states have return successors, (123), 123 states have call predecessors, (123), 123 states have call successors, (123) [2022-07-13 10:11:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 794 transitions. [2022-07-13 10:11:14,220 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 794 transitions. Word has length 53 [2022-07-13 10:11:14,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:14,220 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 794 transitions. [2022-07-13 10:11:14,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.533333333333333) internal successors, (106), 30 states have internal predecessors, (106), 3 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 3 states have call predecessors, (12), 3 states have call successors, (12) [2022-07-13 10:11:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 794 transitions. [2022-07-13 10:11:14,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-13 10:11:14,222 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:14,222 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:14,245 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:14,435 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 [2022-07-13 10:11:14,435 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:14,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:14,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1645650707, now seen corresponding path program 2 times [2022-07-13 10:11:14,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:14,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369880480] [2022-07-13 10:11:14,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:14,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:14,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:14,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:14,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:14,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:14,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:14,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:14,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:14,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:11:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:14,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:11:14,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:14,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:11:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:14,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:11:14,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:14,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:11:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:14,686 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:11:14,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:14,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369880480] [2022-07-13 10:11:14,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369880480] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:14,689 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691747737] [2022-07-13 10:11:14,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:11:14,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:14,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:14,690 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) [2022-07-13 10:11:14,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-13 10:11:14,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:11:14,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:14,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 10:11:14,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:14,832 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:11:14,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:14,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:11:14,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:14,941 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:11:14,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:14,986 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:11:15,051 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:15,052 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:11:15,098 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:15,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:11:15,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:15,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:11:15,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:15,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:11:15,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 10:11:15,276 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 21 proven. 16 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-13 10:11:15,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:16,702 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691747737] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:16,703 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:11:16,703 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-13 10:11:16,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058489827] [2022-07-13 10:11:16,703 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:16,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 10:11:16,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:16,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 10:11:16,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=317, Unknown=1, NotChecked=0, Total=380 [2022-07-13 10:11:16,704 INFO L87 Difference]: Start difference. First operand 519 states and 794 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-13 10:11:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:17,677 INFO L93 Difference]: Finished difference Result 992 states and 1490 transitions. [2022-07-13 10:11:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-13 10:11:17,677 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 63 [2022-07-13 10:11:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:17,682 INFO L225 Difference]: With dead ends: 992 [2022-07-13 10:11:17,682 INFO L226 Difference]: Without dead ends: 990 [2022-07-13 10:11:17,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 91 SyntacticMatches, 17 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=289, Invalid=1516, Unknown=1, NotChecked=0, Total=1806 [2022-07-13 10:11:17,685 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 142 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 99 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:17,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 571 Invalid, 934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 690 Invalid, 0 Unknown, 99 Unchecked, 0.4s Time] [2022-07-13 10:11:17,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2022-07-13 10:11:17,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 571. [2022-07-13 10:11:17,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 422 states have (on average 1.4028436018957346) internal successors, (592), 426 states have internal predecessors, (592), 139 states have call successors, (139), 9 states have call predecessors, (139), 9 states have return successors, (139), 135 states have call predecessors, (139), 139 states have call successors, (139) [2022-07-13 10:11:17,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 870 transitions. [2022-07-13 10:11:17,822 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 870 transitions. Word has length 63 [2022-07-13 10:11:17,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:17,823 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 870 transitions. [2022-07-13 10:11:17,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 17 states have internal predecessors, (63), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-13 10:11:17,823 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 870 transitions. [2022-07-13 10:11:17,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-13 10:11:17,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:17,825 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:17,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:18,039 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 [2022-07-13 10:11:18,039 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:18,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1480379401, now seen corresponding path program 2 times [2022-07-13 10:11:18,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:18,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325891831] [2022-07-13 10:11:18,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:18,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:18,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:18,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:18,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:18,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:18,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:18,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:18,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:18,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:11:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:18,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:11:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:18,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:11:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:18,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:11:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:18,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:11:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:18,260 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:11:18,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:18,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325891831] [2022-07-13 10:11:18,260 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325891831] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:18,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844180050] [2022-07-13 10:11:18,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:11:18,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:18,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:18,262 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) [2022-07-13 10:11:18,263 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-13 10:11:18,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:11:18,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:18,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 10:11:18,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:18,424 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:11:18,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:18,484 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:11:18,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:18,528 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:11:18,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:18,608 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:11:18,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:18,648 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:11:18,696 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:18,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:11:18,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:11:18,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:11:18,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 10:11:18,821 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 36 proven. 18 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-13 10:11:18,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:19,950 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844180050] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:19,950 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:11:19,951 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2022-07-13 10:11:19,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224244905] [2022-07-13 10:11:19,951 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:19,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 10:11:19,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:19,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 10:11:19,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=346, Unknown=1, NotChecked=0, Total=420 [2022-07-13 10:11:19,952 INFO L87 Difference]: Start difference. First operand 571 states and 870 transitions. Second operand has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-13 10:11:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:20,718 INFO L93 Difference]: Finished difference Result 1051 states and 1578 transitions. [2022-07-13 10:11:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-13 10:11:20,718 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 67 [2022-07-13 10:11:20,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:20,723 INFO L225 Difference]: With dead ends: 1051 [2022-07-13 10:11:20,723 INFO L226 Difference]: Without dead ends: 1049 [2022-07-13 10:11:20,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 87 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=267, Invalid=1292, Unknown=1, NotChecked=0, Total=1560 [2022-07-13 10:11:20,724 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 123 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 526 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 526 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 96 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:20,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 508 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 526 Invalid, 0 Unknown, 96 Unchecked, 0.3s Time] [2022-07-13 10:11:20,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1049 states. [2022-07-13 10:11:20,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1049 to 651. [2022-07-13 10:11:20,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 651 states, 478 states have (on average 1.405857740585774) internal successors, (672), 483 states have internal predecessors, (672), 161 states have call successors, (161), 11 states have call predecessors, (161), 11 states have return successors, (161), 156 states have call predecessors, (161), 161 states have call successors, (161) [2022-07-13 10:11:20,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 651 states to 651 states and 994 transitions. [2022-07-13 10:11:20,888 INFO L78 Accepts]: Start accepts. Automaton has 651 states and 994 transitions. Word has length 67 [2022-07-13 10:11:20,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:20,888 INFO L495 AbstractCegarLoop]: Abstraction has 651 states and 994 transitions. [2022-07-13 10:11:20,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.176470588235294) internal successors, (71), 17 states have internal predecessors, (71), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-13 10:11:20,889 INFO L276 IsEmpty]: Start isEmpty. Operand 651 states and 994 transitions. [2022-07-13 10:11:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-13 10:11:20,890 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:20,890 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:20,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:21,109 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 [2022-07-13 10:11:21,109 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:21,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1787147777, now seen corresponding path program 2 times [2022-07-13 10:11:21,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:21,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986783457] [2022-07-13 10:11:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:21,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:21,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:21,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:11:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:11:21,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:11:21,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:11:21,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:11:21,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:11:21,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:21,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986783457] [2022-07-13 10:11:21,273 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986783457] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:21,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476766703] [2022-07-13 10:11:21,274 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:11:21,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:21,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:21,276 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) [2022-07-13 10:11:21,299 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-13 10:11:21,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:11:21,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:21,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-13 10:11:21,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:21,443 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:11:21,502 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:11:21,502 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:11:21,570 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:11:21,570 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:11:21,622 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:11:21,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:11:21,683 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:11:21,683 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:11:21,733 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-13 10:11:21,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:11:21,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:11:21,882 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 45 proven. 24 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-13 10:11:21,883 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:22,040 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476766703] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:22,041 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:11:22,041 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-13 10:11:22,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852297426] [2022-07-13 10:11:22,041 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:22,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:11:22,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:22,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:11:22,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2022-07-13 10:11:22,042 INFO L87 Difference]: Start difference. First operand 651 states and 994 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-13 10:11:22,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:22,972 INFO L93 Difference]: Finished difference Result 790 states and 1187 transitions. [2022-07-13 10:11:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-13 10:11:22,972 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 71 [2022-07-13 10:11:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:22,975 INFO L225 Difference]: With dead ends: 790 [2022-07-13 10:11:22,976 INFO L226 Difference]: Without dead ends: 788 [2022-07-13 10:11:22,976 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 95 SyntacticMatches, 12 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 662 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=355, Invalid=1997, Unknown=0, NotChecked=0, Total=2352 [2022-07-13 10:11:22,978 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 218 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 651 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:22,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 507 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 651 Invalid, 0 Unknown, 76 Unchecked, 0.4s Time] [2022-07-13 10:11:22,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2022-07-13 10:11:23,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 507. [2022-07-13 10:11:23,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 368 states have (on average 1.3940217391304348) internal successors, (513), 373 states have internal predecessors, (513), 125 states have call successors, (125), 13 states have call predecessors, (125), 13 states have return successors, (125), 120 states have call predecessors, (125), 125 states have call successors, (125) [2022-07-13 10:11:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 763 transitions. [2022-07-13 10:11:23,112 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 763 transitions. Word has length 71 [2022-07-13 10:11:23,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:23,112 INFO L495 AbstractCegarLoop]: Abstraction has 507 states and 763 transitions. [2022-07-13 10:11:23,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 20 states have internal predecessors, (79), 7 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2022-07-13 10:11:23,112 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 763 transitions. [2022-07-13 10:11:23,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 10:11:23,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:23,116 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:23,140 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:23,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-13 10:11:23,335 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:23,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:23,335 INFO L85 PathProgramCache]: Analyzing trace with hash 949660519, now seen corresponding path program 5 times [2022-07-13 10:11:23,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:23,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834339011] [2022-07-13 10:11:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:23,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:23,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:23,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:23,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:23,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:23,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:11:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:23,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:11:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:23,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:11:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:23,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:11:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:23,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:11:23,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:23,486 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:11:23,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:23,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834339011] [2022-07-13 10:11:23,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834339011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:23,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625995627] [2022-07-13 10:11:23,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-13 10:11:23,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:23,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:23,489 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:23,490 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-13 10:11:23,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-13 10:11:23,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:23,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 10:11:23,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:23,637 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:11:23,658 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:11:23,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-13 10:11:23,678 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:11:23,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-13 10:11:23,696 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:11:23,697 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-13 10:11:23,799 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:11:23,800 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-13 10:11:23,821 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:11:23,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:23,915 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:11:23,917 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-13 10:11:23,952 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:11:23,952 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625995627] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:23,952 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:23,952 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2022-07-13 10:11:23,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774847253] [2022-07-13 10:11:23,952 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:23,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-13 10:11:23,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:23,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-13 10:11:23,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-07-13 10:11:23,953 INFO L87 Difference]: Start difference. First operand 507 states and 763 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-13 10:11:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:28,094 INFO L93 Difference]: Finished difference Result 7151 states and 11484 transitions. [2022-07-13 10:11:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-07-13 10:11:28,095 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 79 [2022-07-13 10:11:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:28,118 INFO L225 Difference]: With dead ends: 7151 [2022-07-13 10:11:28,118 INFO L226 Difference]: Without dead ends: 7149 [2022-07-13 10:11:28,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 162 SyntacticMatches, 10 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2822 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=834, Invalid=6822, Unknown=0, NotChecked=0, Total=7656 [2022-07-13 10:11:28,122 INFO L413 NwaCegarLoop]: 295 mSDtfsCounter, 251 mSDsluCounter, 983 mSDsCounter, 0 mSdLazyCounter, 2847 mSolverCounterSat, 780 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 3627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 780 IncrementalHoareTripleChecker+Valid, 2847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:28,122 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1278 Invalid, 3627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [780 Valid, 2847 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 10:11:28,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7149 states. [2022-07-13 10:11:28,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7149 to 1236. [2022-07-13 10:11:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1236 states, 894 states have (on average 1.4496644295302012) internal successors, (1296), 899 states have internal predecessors, (1296), 328 states have call successors, (328), 13 states have call predecessors, (328), 13 states have return successors, (328), 323 states have call predecessors, (328), 328 states have call successors, (328) [2022-07-13 10:11:28,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1236 states to 1236 states and 1952 transitions. [2022-07-13 10:11:28,635 INFO L78 Accepts]: Start accepts. Automaton has 1236 states and 1952 transitions. Word has length 79 [2022-07-13 10:11:28,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:28,635 INFO L495 AbstractCegarLoop]: Abstraction has 1236 states and 1952 transitions. [2022-07-13 10:11:28,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 states have internal predecessors, (79), 4 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2022-07-13 10:11:28,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1236 states and 1952 transitions. [2022-07-13 10:11:28,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-13 10:11:28,639 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:28,639 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:28,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:28,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-13 10:11:28,862 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:28,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:28,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1373307241, now seen corresponding path program 1 times [2022-07-13 10:11:28,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:28,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953308040] [2022-07-13 10:11:28,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:28,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:28,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:29,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:29,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:11:29,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:11:29,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:11:29,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:11:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:11:29,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,063 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:11:29,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:29,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953308040] [2022-07-13 10:11:29,064 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953308040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:29,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855590123] [2022-07-13 10:11:29,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:29,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:29,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:29,065 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:29,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-13 10:11:29,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:29,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 10:11:29,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:29,281 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:11:29,353 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:11:29,353 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:11:29,401 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:11:29,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:11:29,447 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:11:29,447 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-13 10:11:29,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:11:29,626 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 45 proven. 48 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-13 10:11:29,627 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:30,793 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:11:30,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-13 10:11:30,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855590123] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:30,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:11:30,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2022-07-13 10:11:30,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708239706] [2022-07-13 10:11:30,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:30,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-13 10:11:30,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:30,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-13 10:11:30,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2022-07-13 10:11:30,834 INFO L87 Difference]: Start difference. First operand 1236 states and 1952 transitions. Second operand has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 24 states have internal predecessors, (95), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-13 10:11:34,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:34,959 INFO L93 Difference]: Finished difference Result 3102 states and 4895 transitions. [2022-07-13 10:11:34,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-13 10:11:34,960 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 24 states have internal predecessors, (95), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 79 [2022-07-13 10:11:34,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:34,971 INFO L225 Difference]: With dead ends: 3102 [2022-07-13 10:11:34,971 INFO L226 Difference]: Without dead ends: 3100 [2022-07-13 10:11:34,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 117 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1741 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=561, Invalid=4550, Unknown=1, NotChecked=0, Total=5112 [2022-07-13 10:11:34,973 INFO L413 NwaCegarLoop]: 124 mSDtfsCounter, 273 mSDsluCounter, 1002 mSDsCounter, 0 mSdLazyCounter, 1672 mSolverCounterSat, 397 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 2236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 397 IncrementalHoareTripleChecker+Valid, 1672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:34,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1126 Invalid, 2236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [397 Valid, 1672 Invalid, 0 Unknown, 167 Unchecked, 0.9s Time] [2022-07-13 10:11:34,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3100 states. [2022-07-13 10:11:35,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3100 to 1441. [2022-07-13 10:11:35,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1040 states have (on average 1.4509615384615384) internal successors, (1509), 1045 states have internal predecessors, (1509), 381 states have call successors, (381), 19 states have call predecessors, (381), 19 states have return successors, (381), 376 states have call predecessors, (381), 381 states have call successors, (381) [2022-07-13 10:11:35,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 2271 transitions. [2022-07-13 10:11:35,387 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 2271 transitions. Word has length 79 [2022-07-13 10:11:35,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:35,388 INFO L495 AbstractCegarLoop]: Abstraction has 1441 states and 2271 transitions. [2022-07-13 10:11:35,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.9583333333333335) internal successors, (95), 24 states have internal predecessors, (95), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-13 10:11:35,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 2271 transitions. [2022-07-13 10:11:35,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-13 10:11:35,391 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:35,391 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:35,416 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-13 10:11:35,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:35,607 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:35,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:35,608 INFO L85 PathProgramCache]: Analyzing trace with hash -739338403, now seen corresponding path program 6 times [2022-07-13 10:11:35,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:35,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223048079] [2022-07-13 10:11:35,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:35,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:35,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:35,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:35,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:35,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:35,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:35,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:35,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:11:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:35,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:11:35,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:35,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:11:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:35,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:11:35,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:35,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:11:35,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:35,766 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:11:35,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:35,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223048079] [2022-07-13 10:11:35,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223048079] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:35,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171584271] [2022-07-13 10:11:35,766 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-13 10:11:35,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:35,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:35,768 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:35,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-13 10:11:35,888 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-13 10:11:35,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:11:35,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 10:11:35,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:35,938 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:11:35,961 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:11:35,961 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-13 10:11:35,997 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:11:35,997 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-13 10:11:36,164 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:11:36,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-13 10:11:36,186 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:11:36,186 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:36,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:11:36,272 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-13 10:11:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:11:36,311 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171584271] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:11:36,311 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:11:36,311 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 19 [2022-07-13 10:11:36,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074827680] [2022-07-13 10:11:36,312 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:36,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 10:11:36,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:36,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 10:11:36,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-07-13 10:11:36,313 INFO L87 Difference]: Start difference. First operand 1441 states and 2271 transitions. Second operand has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-13 10:11:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:11:50,012 INFO L93 Difference]: Finished difference Result 28344 states and 45860 transitions. [2022-07-13 10:11:50,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-07-13 10:11:50,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 83 [2022-07-13 10:11:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:11:50,091 INFO L225 Difference]: With dead ends: 28344 [2022-07-13 10:11:50,091 INFO L226 Difference]: Without dead ends: 28342 [2022-07-13 10:11:50,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 169 SyntacticMatches, 9 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16119 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2956, Invalid=34874, Unknown=0, NotChecked=0, Total=37830 [2022-07-13 10:11:50,107 INFO L413 NwaCegarLoop]: 620 mSDtfsCounter, 377 mSDsluCounter, 2119 mSDsCounter, 0 mSdLazyCounter, 7546 mSolverCounterSat, 1672 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 413 SdHoareTripleChecker+Valid, 2739 SdHoareTripleChecker+Invalid, 9218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1672 IncrementalHoareTripleChecker+Valid, 7546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:11:50,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [413 Valid, 2739 Invalid, 9218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1672 Valid, 7546 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-07-13 10:11:50,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28342 states. [2022-07-13 10:11:51,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28342 to 3804. [2022-07-13 10:11:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 2738 states have (on average 1.4747991234477722) internal successors, (4038), 2743 states have internal predecessors, (4038), 1046 states have call successors, (1046), 19 states have call predecessors, (1046), 19 states have return successors, (1046), 1041 states have call predecessors, (1046), 1046 states have call successors, (1046) [2022-07-13 10:11:51,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 6130 transitions. [2022-07-13 10:11:51,634 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 6130 transitions. Word has length 83 [2022-07-13 10:11:51,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:11:51,634 INFO L495 AbstractCegarLoop]: Abstraction has 3804 states and 6130 transitions. [2022-07-13 10:11:51,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.473684210526316) internal successors, (85), 19 states have internal predecessors, (85), 4 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2022-07-13 10:11:51,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 6130 transitions. [2022-07-13 10:11:51,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-13 10:11:51,640 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:11:51,640 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 6, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:11:51,666 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2022-07-13 10:11:51,855 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-07-13 10:11:51,855 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:11:51,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:11:51,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1710261727, now seen corresponding path program 1 times [2022-07-13 10:11:51,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:11:51,856 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811743844] [2022-07-13 10:11:51,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:51,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:11:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:52,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:11:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:52,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:11:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:52,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:11:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:52,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:11:52,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:52,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:11:52,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:52,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:11:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:52,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:11:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:52,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:11:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:11:52,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:11:52,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811743844] [2022-07-13 10:11:52,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811743844] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:52,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942349644] [2022-07-13 10:11:52,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:11:52,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:11:52,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:11:52,023 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:11:52,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-13 10:11:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:11:52,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 10:11:52,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:11:52,239 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:11:52,306 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:11:52,306 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:11:52,353 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:11:52,354 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-13 10:11:52,552 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:11:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 36 proven. 66 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-07-13 10:11:52,572 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:11:55,275 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:11:55,285 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-13 10:11:55,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942349644] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:11:55,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:11:55,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2022-07-13 10:11:55,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759167058] [2022-07-13 10:11:55,323 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:11:55,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-13 10:11:55,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:11:55,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-13 10:11:55,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=995, Unknown=1, NotChecked=0, Total=1122 [2022-07-13 10:11:55,324 INFO L87 Difference]: Start difference. First operand 3804 states and 6130 transitions. Second operand has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-13 10:12:01,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:12:01,931 INFO L93 Difference]: Finished difference Result 8724 states and 13979 transitions. [2022-07-13 10:12:01,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-07-13 10:12:01,932 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 83 [2022-07-13 10:12:01,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:12:01,952 INFO L225 Difference]: With dead ends: 8724 [2022-07-13 10:12:01,952 INFO L226 Difference]: Without dead ends: 8722 [2022-07-13 10:12:01,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 117 SyntacticMatches, 8 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2556 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=721, Invalid=6586, Unknown=3, NotChecked=0, Total=7310 [2022-07-13 10:12:01,956 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 293 mSDsluCounter, 938 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 2373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 173 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-13 10:12:01,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [308 Valid, 1069 Invalid, 2373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 1730 Invalid, 0 Unknown, 173 Unchecked, 0.9s Time] [2022-07-13 10:12:01,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8722 states. [2022-07-13 10:12:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8722 to 3155. [2022-07-13 10:12:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3155 states, 2272 states have (on average 1.4669894366197183) internal successors, (3333), 2287 states have internal predecessors, (3333), 857 states have call successors, (857), 25 states have call predecessors, (857), 25 states have return successors, (857), 842 states have call predecessors, (857), 857 states have call successors, (857) [2022-07-13 10:12:02,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3155 states to 3155 states and 5047 transitions. [2022-07-13 10:12:02,996 INFO L78 Accepts]: Start accepts. Automaton has 3155 states and 5047 transitions. Word has length 83 [2022-07-13 10:12:02,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:12:02,996 INFO L495 AbstractCegarLoop]: Abstraction has 3155 states and 5047 transitions. [2022-07-13 10:12:02,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.9615384615384617) internal successors, (103), 26 states have internal predecessors, (103), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-13 10:12:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3155 states and 5047 transitions. [2022-07-13 10:12:03,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-07-13 10:12:03,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:12:03,002 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:12:03,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-13 10:12:03,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-13 10:12:03,215 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:12:03,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:12:03,216 INFO L85 PathProgramCache]: Analyzing trace with hash 511687486, now seen corresponding path program 1 times [2022-07-13 10:12:03,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:12:03,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574805368] [2022-07-13 10:12:03,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:12:03,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:12:03,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:12:03,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:12:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:12:03,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:12:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:12:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:12:03,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:12:03,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:12:03,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 10:12:03,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 10:12:03,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 10:12:03,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-13 10:12:03,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-13 10:12:03,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:12:03,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574805368] [2022-07-13 10:12:03,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574805368] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:12:03,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198020716] [2022-07-13 10:12:03,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:12:03,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:12:03,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:12:03,495 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:12:03,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-13 10:12:03,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:03,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-13 10:12:03,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:12:03,678 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:12:03,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:12:03,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:12:03,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:12:03,807 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:12:03,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:12:03,862 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:12:03,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:12:03,944 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:12:04,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:12:04,001 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:12:04,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:12:04,050 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:12:04,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:12:04,104 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:12:04,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:12:04,192 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:12:04,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:12:04,247 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:12:04,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:12:04,303 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:12:04,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:12:04,362 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 23 [2022-07-13 10:12:04,420 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 10:12:04,441 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 46 proven. 32 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2022-07-13 10:12:04,442 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:12:05,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198020716] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:12:05,933 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:12:05,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2022-07-13 10:12:05,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960758372] [2022-07-13 10:12:05,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:12:05,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-13 10:12:05,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:12:05,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-13 10:12:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=387, Unknown=1, NotChecked=0, Total=462 [2022-07-13 10:12:05,934 INFO L87 Difference]: Start difference. First operand 3155 states and 5047 transitions. Second operand has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-07-13 10:12:07,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:12:07,703 INFO L93 Difference]: Finished difference Result 3349 states and 5259 transitions. [2022-07-13 10:12:07,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 10:12:07,703 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 89 [2022-07-13 10:12:07,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:12:07,712 INFO L225 Difference]: With dead ends: 3349 [2022-07-13 10:12:07,712 INFO L226 Difference]: Without dead ends: 3347 [2022-07-13 10:12:07,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 120 SyntacticMatches, 25 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=296, Invalid=1509, Unknown=1, NotChecked=0, Total=1806 [2022-07-13 10:12:07,714 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 141 mSDsluCounter, 399 mSDsCounter, 0 mSdLazyCounter, 617 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 617 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 52 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:12:07,715 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [141 Valid, 471 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 617 Invalid, 0 Unknown, 52 Unchecked, 0.3s Time] [2022-07-13 10:12:07,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3347 states. [2022-07-13 10:12:08,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3347 to 1999. [2022-07-13 10:12:08,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1999 states, 1440 states have (on average 1.4479166666666667) internal successors, (2085), 1452 states have internal predecessors, (2085), 527 states have call successors, (527), 31 states have call predecessors, (527), 31 states have return successors, (527), 515 states have call predecessors, (527), 527 states have call successors, (527) [2022-07-13 10:12:08,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1999 states to 1999 states and 3139 transitions. [2022-07-13 10:12:08,543 INFO L78 Accepts]: Start accepts. Automaton has 1999 states and 3139 transitions. Word has length 89 [2022-07-13 10:12:08,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:12:08,543 INFO L495 AbstractCegarLoop]: Abstraction has 1999 states and 3139 transitions. [2022-07-13 10:12:08,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.368421052631579) internal successors, (83), 19 states have internal predecessors, (83), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-07-13 10:12:08,544 INFO L276 IsEmpty]: Start isEmpty. Operand 1999 states and 3139 transitions. [2022-07-13 10:12:08,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-13 10:12:08,549 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:12:08,549 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:12:08,574 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-13 10:12:08,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-13 10:12:08,771 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:12:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:12:08,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1965057965, now seen corresponding path program 7 times [2022-07-13 10:12:08,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:12:08,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460035127] [2022-07-13 10:12:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:12:08,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:12:08,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:08,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:12:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:08,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:12:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:08,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:12:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:08,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:12:08,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:08,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:12:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:08,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:12:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:08,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:12:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:08,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:12:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:08,948 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:12:08,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:12:08,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460035127] [2022-07-13 10:12:08,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460035127] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:12:08,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010479441] [2022-07-13 10:12:08,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-13 10:12:08,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:12:08,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:12:08,951 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:12:08,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-13 10:12:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:09,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-13 10:12:09,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:12:09,087 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:12:09,108 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-13 10:12:09,108 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 29 [2022-07-13 10:12:09,296 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:12:09,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-13 10:12:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:12:09,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:12:09,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:12:09,404 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-13 10:12:09,465 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:12:09,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010479441] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:12:09,465 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:12:09,466 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 21 [2022-07-13 10:12:09,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62033950] [2022-07-13 10:12:09,466 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:12:09,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-13 10:12:09,466 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:12:09,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-13 10:12:09,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-07-13 10:12:09,467 INFO L87 Difference]: Start difference. First operand 1999 states and 3139 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-13 10:12:37,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:12:37,282 INFO L93 Difference]: Finished difference Result 41151 states and 66583 transitions. [2022-07-13 10:12:37,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 290 states. [2022-07-13 10:12:37,282 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 87 [2022-07-13 10:12:37,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:12:37,390 INFO L225 Difference]: With dead ends: 41151 [2022-07-13 10:12:37,390 INFO L226 Difference]: Without dead ends: 41149 [2022-07-13 10:12:37,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 176 SyntacticMatches, 8 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37886 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5012, Invalid=80544, Unknown=0, NotChecked=0, Total=85556 [2022-07-13 10:12:37,413 INFO L413 NwaCegarLoop]: 940 mSDtfsCounter, 505 mSDsluCounter, 4391 mSDsCounter, 0 mSdLazyCounter, 13515 mSolverCounterSat, 3053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 5331 SdHoareTripleChecker+Invalid, 16568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3053 IncrementalHoareTripleChecker+Valid, 13515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.1s IncrementalHoareTripleChecker+Time [2022-07-13 10:12:37,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 5331 Invalid, 16568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3053 Valid, 13515 Invalid, 0 Unknown, 0 Unchecked, 7.1s Time] [2022-07-13 10:12:37,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41149 states. [2022-07-13 10:12:41,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41149 to 6546. [2022-07-13 10:12:41,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6546 states, 4698 states have (on average 1.4776500638569605) internal successors, (6942), 4707 states have internal predecessors, (6942), 1816 states have call successors, (1816), 31 states have call predecessors, (1816), 31 states have return successors, (1816), 1807 states have call predecessors, (1816), 1816 states have call successors, (1816) [2022-07-13 10:12:41,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6546 states to 6546 states and 10574 transitions. [2022-07-13 10:12:41,166 INFO L78 Accepts]: Start accepts. Automaton has 6546 states and 10574 transitions. Word has length 87 [2022-07-13 10:12:41,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:12:41,166 INFO L495 AbstractCegarLoop]: Abstraction has 6546 states and 10574 transitions. [2022-07-13 10:12:41,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 21 states have internal predecessors, (91), 4 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2022-07-13 10:12:41,166 INFO L276 IsEmpty]: Start isEmpty. Operand 6546 states and 10574 transitions. [2022-07-13 10:12:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-13 10:12:41,173 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:12:41,174 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:12:41,197 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-13 10:12:41,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:12:41,387 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:12:41,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:12:41,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1305526443, now seen corresponding path program 1 times [2022-07-13 10:12:41,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:12:41,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976445924] [2022-07-13 10:12:41,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:12:41,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:12:41,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:41,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:12:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:41,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:12:41,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:41,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:12:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:41,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:12:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:41,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:12:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:41,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:12:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:41,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:12:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:41,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:12:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:41,573 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:12:41,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:12:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976445924] [2022-07-13 10:12:41,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976445924] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:12:41,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097390271] [2022-07-13 10:12:41,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:12:41,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:12:41,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:12:41,576 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:12:41,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-13 10:12:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:12:41,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 10:12:41,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:12:41,860 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:12:41,940 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-13 10:12:41,940 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2022-07-13 10:12:42,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:12:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 21 proven. 88 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2022-07-13 10:12:42,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:12:42,464 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:12:42,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-13 10:12:42,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097390271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:12:42,507 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:12:42,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2022-07-13 10:12:42,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548155104] [2022-07-13 10:12:42,508 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:12:42,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-13 10:12:42,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:12:42,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-13 10:12:42,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1199, Unknown=0, NotChecked=0, Total=1332 [2022-07-13 10:12:42,510 INFO L87 Difference]: Start difference. First operand 6546 states and 10574 transitions. Second operand has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 28 states have internal predecessors, (111), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-13 10:13:02,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:13:02,876 INFO L93 Difference]: Finished difference Result 22723 states and 36577 transitions. [2022-07-13 10:13:02,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-07-13 10:13:02,876 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 28 states have internal predecessors, (111), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 87 [2022-07-13 10:13:02,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:13:02,922 INFO L225 Difference]: With dead ends: 22723 [2022-07-13 10:13:02,922 INFO L226 Difference]: Without dead ends: 22721 [2022-07-13 10:13:02,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3456 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=922, Invalid=9376, Unknown=4, NotChecked=0, Total=10302 [2022-07-13 10:13:02,931 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 404 mSDsluCounter, 1164 mSDsCounter, 0 mSdLazyCounter, 2305 mSolverCounterSat, 745 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 421 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 3272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 745 IncrementalHoareTripleChecker+Valid, 2305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-13 10:13:02,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [421 Valid, 1347 Invalid, 3272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [745 Valid, 2305 Invalid, 0 Unknown, 222 Unchecked, 1.4s Time] [2022-07-13 10:13:02,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22721 states. [2022-07-13 10:13:05,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22721 to 5117. [2022-07-13 10:13:05,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5117 states, 3688 states have (on average 1.466648590021692) internal successors, (5409), 3713 states have internal predecessors, (5409), 1379 states have call successors, (1379), 49 states have call predecessors, (1379), 49 states have return successors, (1379), 1354 states have call predecessors, (1379), 1379 states have call successors, (1379) [2022-07-13 10:13:05,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5117 states to 5117 states and 8167 transitions. [2022-07-13 10:13:05,597 INFO L78 Accepts]: Start accepts. Automaton has 5117 states and 8167 transitions. Word has length 87 [2022-07-13 10:13:05,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:13:05,597 INFO L495 AbstractCegarLoop]: Abstraction has 5117 states and 8167 transitions. [2022-07-13 10:13:05,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.9642857142857144) internal successors, (111), 28 states have internal predecessors, (111), 6 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2022-07-13 10:13:05,598 INFO L276 IsEmpty]: Start isEmpty. Operand 5117 states and 8167 transitions. [2022-07-13 10:13:05,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-07-13 10:13:05,606 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:13:05,606 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:13:05,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-13 10:13:05,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:13:05,823 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:13:05,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:13:05,824 INFO L85 PathProgramCache]: Analyzing trace with hash -304742602, now seen corresponding path program 1 times [2022-07-13 10:13:05,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:13:05,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549236217] [2022-07-13 10:13:05,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:13:05,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:13:05,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:13:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:13:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:13:06,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:13:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:13:06,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:13:06,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:13:06,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:13:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-07-13 10:13:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2022-07-13 10:13:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-13 10:13:06,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2022-07-13 10:13:06,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,065 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2022-07-13 10:13:06,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:13:06,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549236217] [2022-07-13 10:13:06,066 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549236217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:13:06,066 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262576083] [2022-07-13 10:13:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:13:06,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:13:06,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:13:06,068 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:13:06,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-13 10:13:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:06,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-13 10:13:06,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:13:06,259 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:13:06,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:13:06,314 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:13:06,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:13:06,357 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-13 10:13:06,423 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:13:06,423 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:13:06,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:13:06,467 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:13:06,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:13:06,509 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:13:06,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:13:06,553 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:13:06,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:13:06,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:13:06,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:13:06,670 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:13:06,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:13:06,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:13:06,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-13 10:13:06,781 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-13 10:13:06,854 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-07-13 10:13:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 73 proven. 34 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2022-07-13 10:13:06,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:13:07,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262576083] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:13:07,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:13:07,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2022-07-13 10:13:07,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019709174] [2022-07-13 10:13:07,896 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:13:07,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-13 10:13:07,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:13:07,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-13 10:13:07,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=468, Unknown=1, NotChecked=0, Total=552 [2022-07-13 10:13:07,897 INFO L87 Difference]: Start difference. First operand 5117 states and 8167 transitions. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-07-13 10:13:10,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:13:10,889 INFO L93 Difference]: Finished difference Result 5447 states and 8500 transitions. [2022-07-13 10:13:10,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-13 10:13:10,889 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) Word has length 93 [2022-07-13 10:13:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:13:10,899 INFO L225 Difference]: With dead ends: 5447 [2022-07-13 10:13:10,899 INFO L226 Difference]: Without dead ends: 5445 [2022-07-13 10:13:10,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 123 SyntacticMatches, 23 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 657 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=322, Invalid=1657, Unknown=1, NotChecked=0, Total=1980 [2022-07-13 10:13:10,902 INFO L413 NwaCegarLoop]: 72 mSDtfsCounter, 140 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 53 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-13 10:13:10,902 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 483 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 657 Invalid, 0 Unknown, 53 Unchecked, 0.3s Time] [2022-07-13 10:13:10,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2022-07-13 10:13:12,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 1842. [2022-07-13 10:13:12,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1336 states have (on average 1.43937125748503) internal successors, (1923), 1348 states have internal predecessors, (1923), 475 states have call successors, (475), 30 states have call predecessors, (475), 30 states have return successors, (475), 463 states have call predecessors, (475), 475 states have call successors, (475) [2022-07-13 10:13:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2873 transitions. [2022-07-13 10:13:12,628 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2873 transitions. Word has length 93 [2022-07-13 10:13:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:13:12,628 INFO L495 AbstractCegarLoop]: Abstraction has 1842 states and 2873 transitions. [2022-07-13 10:13:12,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 9 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 9 states have call predecessors, (24), 9 states have call successors, (24) [2022-07-13 10:13:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2873 transitions. [2022-07-13 10:13:12,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:13:12,632 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:13:12,632 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:13:12,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-13 10:13:12,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-07-13 10:13:12,857 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:13:12,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:13:12,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1859857993, now seen corresponding path program 8 times [2022-07-13 10:13:12,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:13:12,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116714846] [2022-07-13 10:13:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:13:12,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:13:12,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:13,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:13:13,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:13,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:13:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:13,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:13:13,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:13,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:13:13,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:13,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:13:13,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:13,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:13:13,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:13,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:13:13,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:13,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:13:13,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:13:13,022 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:13:13,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:13:13,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116714846] [2022-07-13 10:13:13,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116714846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:13:13,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490452315] [2022-07-13 10:13:13,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 10:13:13,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:13:13,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:13:13,024 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:13:13,026 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-13 10:13:13,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 10:13:13,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:13:13,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-13 10:13:13,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:13:13,170 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-13 10:13:13,372 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-13 10:13:13,372 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 24 [2022-07-13 10:13:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:13:13,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:13:13,455 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:13:13,457 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-13 10:13:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:13:13,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490452315] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:13:13,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:13:13,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 23 [2022-07-13 10:13:13,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410643685] [2022-07-13 10:13:13,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:13:13,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-13 10:13:13,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:13:13,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-13 10:13:13,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-07-13 10:13:13,516 INFO L87 Difference]: Start difference. First operand 1842 states and 2873 transitions. Second operand has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:14:15,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:14:15,524 INFO L93 Difference]: Finished difference Result 39161 states and 62980 transitions. [2022-07-13 10:14:15,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 482 states. [2022-07-13 10:14:15,526 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 91 [2022-07-13 10:14:15,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:14:15,601 INFO L225 Difference]: With dead ends: 39161 [2022-07-13 10:14:15,602 INFO L226 Difference]: Without dead ends: 39159 [2022-07-13 10:14:15,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 675 GetRequests, 183 SyntacticMatches, 7 SemanticMatches, 485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108315 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=10015, Invalid=226667, Unknown=0, NotChecked=0, Total=236682 [2022-07-13 10:14:15,621 INFO L413 NwaCegarLoop]: 1511 mSDtfsCounter, 639 mSDsluCounter, 7363 mSDsCounter, 0 mSdLazyCounter, 22840 mSolverCounterSat, 5095 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 8874 SdHoareTripleChecker+Invalid, 27935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5095 IncrementalHoareTripleChecker+Valid, 22840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2022-07-13 10:14:15,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [679 Valid, 8874 Invalid, 27935 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5095 Valid, 22840 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2022-07-13 10:14:15,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39159 states. [2022-07-13 10:14:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39159 to 7584. [2022-07-13 10:14:24,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7584 states, 5452 states have (on average 1.477072633895818) internal successors, (8053), 5455 states have internal predecessors, (8053), 2101 states have call successors, (2101), 30 states have call predecessors, (2101), 30 states have return successors, (2101), 2098 states have call predecessors, (2101), 2101 states have call successors, (2101) [2022-07-13 10:14:24,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7584 states to 7584 states and 12255 transitions. [2022-07-13 10:14:24,559 INFO L78 Accepts]: Start accepts. Automaton has 7584 states and 12255 transitions. Word has length 91 [2022-07-13 10:14:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:14:24,559 INFO L495 AbstractCegarLoop]: Abstraction has 7584 states and 12255 transitions. [2022-07-13 10:14:24,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.173913043478261) internal successors, (96), 23 states have internal predecessors, (96), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-07-13 10:14:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 7584 states and 12255 transitions. [2022-07-13 10:14:24,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-13 10:14:24,565 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:14:24,566 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:14:24,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-13 10:14:24,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-13 10:14:24,789 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:14:24,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:14:24,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1015852491, now seen corresponding path program 1 times [2022-07-13 10:14:24,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:14:24,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282312247] [2022-07-13 10:14:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:14:24,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:14:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:24,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:14:24,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:24,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:14:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:24,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:14:24,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:24,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:14:24,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:24,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:14:24,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:24,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:14:24,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:24,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:14:24,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:24,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:14:24,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:24,985 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:14:24,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:14:24,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282312247] [2022-07-13 10:14:24,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282312247] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:14:24,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828084191] [2022-07-13 10:14:24,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:14:24,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:14:24,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:14:24,988 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:14:25,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-13 10:14:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:25,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-13 10:14:25,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:14:25,270 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2022-07-13 10:14:25,592 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2022-07-13 10:14:25,618 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:14:25,618 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:14:25,861 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-13 10:14:25,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2022-07-13 10:14:25,914 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828084191] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:14:25,914 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-13 10:14:25,914 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2022-07-13 10:14:25,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029984974] [2022-07-13 10:14:25,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-13 10:14:25,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-13 10:14:25,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:14:25,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-13 10:14:25,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2022-07-13 10:14:25,916 INFO L87 Difference]: Start difference. First operand 7584 states and 12255 transitions. Second operand has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 29 states have internal predecessors, (117), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-13 10:14:49,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 10:14:49,414 INFO L93 Difference]: Finished difference Result 17304 states and 27568 transitions. [2022-07-13 10:14:49,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-07-13 10:14:49,415 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 29 states have internal predecessors, (117), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 91 [2022-07-13 10:14:49,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 10:14:49,439 INFO L225 Difference]: With dead ends: 17304 [2022-07-13 10:14:49,439 INFO L226 Difference]: Without dead ends: 17302 [2022-07-13 10:14:49,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7117 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2375, Invalid=18795, Unknown=0, NotChecked=0, Total=21170 [2022-07-13 10:14:49,444 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 506 mSDsluCounter, 1280 mSDsCounter, 0 mSdLazyCounter, 3142 mSolverCounterSat, 1019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 4161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1019 IncrementalHoareTripleChecker+Valid, 3142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-13 10:14:49,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 1448 Invalid, 4161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1019 Valid, 3142 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-13 10:14:49,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17302 states. [2022-07-13 10:14:53,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17302 to 3613. [2022-07-13 10:14:53,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 2642 states have (on average 1.4542013626040877) internal successors, (3842), 2645 states have internal predecessors, (3842), 940 states have call successors, (940), 30 states have call predecessors, (940), 30 states have return successors, (940), 937 states have call predecessors, (940), 940 states have call successors, (940) [2022-07-13 10:14:53,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 5722 transitions. [2022-07-13 10:14:53,744 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 5722 transitions. Word has length 91 [2022-07-13 10:14:53,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 10:14:53,744 INFO L495 AbstractCegarLoop]: Abstraction has 3613 states and 5722 transitions. [2022-07-13 10:14:53,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.0344827586206895) internal successors, (117), 29 states have internal predecessors, (117), 4 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2022-07-13 10:14:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 5722 transitions. [2022-07-13 10:14:53,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-13 10:14:53,751 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 10:14:53,751 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 10:14:53,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-13 10:14:53,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:14:53,967 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 10:14:53,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 10:14:53,968 INFO L85 PathProgramCache]: Analyzing trace with hash 512678207, now seen corresponding path program 9 times [2022-07-13 10:14:53,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 10:14:53,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575884724] [2022-07-13 10:14:53,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 10:14:53,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 10:14:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:54,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2022-07-13 10:14:54,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:54,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2022-07-13 10:14:54,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:54,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-07-13 10:14:54,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:54,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-13 10:14:54,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:54,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-07-13 10:14:54,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:54,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-13 10:14:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:54,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-07-13 10:14:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:54,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-07-13 10:14:54,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 10:14:54,340 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 99 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:14:54,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 10:14:54,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575884724] [2022-07-13 10:14:54,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575884724] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 10:14:54,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937519941] [2022-07-13 10:14:54,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 10:14:54,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 10:14:54,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 10:14:54,344 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 10:14:54,371 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-13 10:14:54,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-13 10:14:54,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 10:14:54,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-13 10:14:54,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 10:14:55,214 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 128 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:14:55,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 10:14:55,559 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 128 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-13 10:14:55,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937519941] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 10:14:55,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 10:14:55,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 46 [2022-07-13 10:14:55,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878775479] [2022-07-13 10:14:55,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 10:14:55,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-13 10:14:55,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 10:14:55,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-13 10:14:55,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=512, Invalid=1558, Unknown=0, NotChecked=0, Total=2070 [2022-07-13 10:14:55,562 INFO L87 Difference]: Start difference. First operand 3613 states and 5722 transitions. Second operand has 46 states, 46 states have (on average 4.021739130434782) internal successors, (185), 46 states have internal predecessors, (185), 6 states have call successors, (24), 2 states have call predecessors, (24), 2 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24)