./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/theatreSquare.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb692b52 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/loops-crafted-1/theatreSquare.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 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 15:20:43,949 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 15:20:43,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 15:20:43,982 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 15:20:43,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 15:20:43,984 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 15:20:43,985 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 15:20:43,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 15:20:43,988 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 15:20:43,989 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 15:20:43,990 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 15:20:43,991 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 15:20:43,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 15:20:43,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 15:20:43,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 15:20:43,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 15:20:44,002 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 15:20:44,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 15:20:44,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 15:20:44,009 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 15:20:44,010 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 15:20:44,015 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 15:20:44,016 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 15:20:44,017 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 15:20:44,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 15:20:44,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 15:20:44,023 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 15:20:44,023 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 15:20:44,024 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 15:20:44,025 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 15:20:44,026 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 15:20:44,026 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 15:20:44,027 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 15:20:44,028 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 15:20:44,029 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 15:20:44,030 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 15:20:44,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 15:20:44,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 15:20:44,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 15:20:44,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 15:20:44,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 15:20:44,032 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 15:20:44,034 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 15:20:44,065 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 15:20:44,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 15:20:44,066 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 15:20:44,066 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 15:20:44,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 15:20:44,067 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 15:20:44,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 15:20:44,067 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 15:20:44,067 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 15:20:44,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 15:20:44,069 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 15:20:44,069 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 15:20:44,069 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 15:20:44,069 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 15:20:44,069 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 15:20:44,070 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 15:20:44,070 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 15:20:44,070 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 15:20:44,070 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 15:20:44,072 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 15:20:44,072 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 15:20:44,072 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 15:20:44,072 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 15:20:44,072 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 15:20:44,073 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:20:44,073 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 15:20:44,073 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 15:20:44,073 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 15:20:44,073 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 15:20:44,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 15:20:44,074 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 15:20:44,074 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 15:20:44,074 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 15:20:44,074 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 [2022-07-19 15:20:44,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 15:20:44,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 15:20:44,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 15:20:44,319 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 15:20:44,320 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 15:20:44,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2022-07-19 15:20:44,365 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed3a8d03a/b19af54a02e54e93a245d14281414f53/FLAGd5fadb490 [2022-07-19 15:20:44,712 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 15:20:44,717 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2022-07-19 15:20:44,722 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed3a8d03a/b19af54a02e54e93a245d14281414f53/FLAGd5fadb490 [2022-07-19 15:20:45,122 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed3a8d03a/b19af54a02e54e93a245d14281414f53 [2022-07-19 15:20:45,124 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 15:20:45,126 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 15:20:45,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 15:20:45,127 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 15:20:45,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 15:20:45,131 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:20:45" (1/1) ... [2022-07-19 15:20:45,131 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ba5e680 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:20:45, skipping insertion in model container [2022-07-19 15:20:45,132 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 03:20:45" (1/1) ... [2022-07-19 15:20:45,139 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 15:20:45,152 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 15:20:45,277 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/loops-crafted-1/theatreSquare.c[370,383] [2022-07-19 15:20:45,297 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:20:45,302 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 15:20:45,324 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/loops-crafted-1/theatreSquare.c[370,383] [2022-07-19 15:20:45,335 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 15:20:45,345 INFO L208 MainTranslator]: Completed translation [2022-07-19 15:20:45,346 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:20:45 WrapperNode [2022-07-19 15:20:45,346 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 15:20:45,347 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 15:20:45,347 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 15:20:45,347 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 15:20:45,354 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:20:45" (1/1) ... [2022-07-19 15:20:45,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:20:45" (1/1) ... [2022-07-19 15:20:45,383 INFO L137 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 100 [2022-07-19 15:20:45,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 15:20:45,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 15:20:45,385 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 15:20:45,385 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 15:20:45,391 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:20:45" (1/1) ... [2022-07-19 15:20:45,392 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:20:45" (1/1) ... [2022-07-19 15:20:45,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:20:45" (1/1) ... [2022-07-19 15:20:45,401 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:20:45" (1/1) ... [2022-07-19 15:20:45,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:20:45" (1/1) ... [2022-07-19 15:20:45,414 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:20:45" (1/1) ... [2022-07-19 15:20:45,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:20:45" (1/1) ... [2022-07-19 15:20:45,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 15:20:45,427 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 15:20:45,427 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 15:20:45,427 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 15:20:45,428 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:20:45" (1/1) ... [2022-07-19 15:20:45,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 15:20:45,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:45,456 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) [2022-07-19 15:20:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 15:20:45,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 15:20:45,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 15:20:45,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 15:20:45,487 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 [2022-07-19 15:20:45,558 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 15:20:45,560 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 15:20:45,687 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 15:20:45,692 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 15:20:45,692 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-07-19 15:20:45,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:20:45 BoogieIcfgContainer [2022-07-19 15:20:45,693 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 15:20:45,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 15:20:45,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 15:20:45,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 15:20:45,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 03:20:45" (1/3) ... [2022-07-19 15:20:45,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd76acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:20:45, skipping insertion in model container [2022-07-19 15:20:45,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 03:20:45" (2/3) ... [2022-07-19 15:20:45,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bd76acd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 03:20:45, skipping insertion in model container [2022-07-19 15:20:45,699 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 03:20:45" (3/3) ... [2022-07-19 15:20:45,700 INFO L111 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2022-07-19 15:20:45,712 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 15:20:45,712 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 15:20:45,748 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 15:20:45,754 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@6aa20fde, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5bcc8211 [2022-07-19 15:20:45,754 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 15:20:45,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:45,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-07-19 15:20:45,773 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:45,774 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-07-19 15:20:45,774 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:45,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:45,778 INFO L85 PathProgramCache]: Analyzing trace with hash 891969447, now seen corresponding path program 1 times [2022-07-19 15:20:45,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:45,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291250303] [2022-07-19 15:20:45,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:45,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:45,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:20:45,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:45,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291250303] [2022-07-19 15:20:45,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291250303] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:20:45,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:20:45,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 15:20:45,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621066341] [2022-07-19 15:20:45,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:20:45,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:20:45,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:46,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:20:46,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:20:46,021 INFO L87 Difference]: Start difference. First operand has 23 states, 21 states have (on average 1.7142857142857142) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:46,056 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2022-07-19 15:20:46,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:20:46,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 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 6 [2022-07-19 15:20:46,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:46,065 INFO L225 Difference]: With dead ends: 48 [2022-07-19 15:20:46,066 INFO L226 Difference]: Without dead ends: 19 [2022-07-19 15:20:46,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:20:46,077 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:46,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 65 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:46,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-07-19 15:20:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-07-19 15:20:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-07-19 15:20:46,111 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6 [2022-07-19 15:20:46,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:46,111 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-07-19 15:20:46,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,112 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-07-19 15:20:46,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-19 15:20:46,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:46,113 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:46,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 15:20:46,113 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:46,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:46,116 INFO L85 PathProgramCache]: Analyzing trace with hash 535820783, now seen corresponding path program 1 times [2022-07-19 15:20:46,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:46,117 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795044579] [2022-07-19 15:20:46,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:46,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:46,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:46,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:20:46,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:46,260 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795044579] [2022-07-19 15:20:46,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795044579] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:20:46,261 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:20:46,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-07-19 15:20:46,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263722696] [2022-07-19 15:20:46,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:20:46,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-19 15:20:46,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:46,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-19 15:20:46,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-07-19 15:20:46,264 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:46,374 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-07-19 15:20:46,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 15:20:46,375 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2022-07-19 15:20:46,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:46,376 INFO L225 Difference]: With dead ends: 39 [2022-07-19 15:20:46,376 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 15:20:46,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2022-07-19 15:20:46,378 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:46,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 133 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:46,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 15:20:46,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2022-07-19 15:20:46,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2022-07-19 15:20:46,384 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 18 [2022-07-19 15:20:46,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:46,384 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2022-07-19 15:20:46,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,385 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2022-07-19 15:20:46,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 15:20:46,386 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:46,386 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:46,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 15:20:46,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:46,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:46,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1031838486, now seen corresponding path program 1 times [2022-07-19 15:20:46,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:46,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675158679] [2022-07-19 15:20:46,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:46,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:20:46,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:46,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675158679] [2022-07-19 15:20:46,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675158679] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:20:46,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:20:46,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 15:20:46,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841847543] [2022-07-19 15:20:46,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:20:46,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:20:46,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:46,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:20:46,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:20:46,440 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:46,449 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-07-19 15:20:46,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 15:20:46,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-19 15:20:46,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:46,451 INFO L225 Difference]: With dead ends: 47 [2022-07-19 15:20:46,451 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 15:20:46,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:20:46,452 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:46,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:46,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 15:20:46,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-07-19 15:20:46,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3666666666666667) internal successors, (41), 30 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2022-07-19 15:20:46,458 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 19 [2022-07-19 15:20:46,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:46,458 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2022-07-19 15:20:46,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,459 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2022-07-19 15:20:46,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-19 15:20:46,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:46,460 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:46,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 15:20:46,460 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:46,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:46,461 INFO L85 PathProgramCache]: Analyzing trace with hash 1782670069, now seen corresponding path program 1 times [2022-07-19 15:20:46,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:46,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372523466] [2022-07-19 15:20:46,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:46,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:46,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 15:20:46,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:46,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372523466] [2022-07-19 15:20:46,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372523466] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:20:46,502 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:20:46,502 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 15:20:46,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996471596] [2022-07-19 15:20:46,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:20:46,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:20:46,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:46,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:20:46,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:20:46,504 INFO L87 Difference]: Start difference. First operand 31 states and 41 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:46,514 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2022-07-19 15:20:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 15:20:46,515 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2022-07-19 15:20:46,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:46,516 INFO L225 Difference]: With dead ends: 66 [2022-07-19 15:20:46,516 INFO L226 Difference]: Without dead ends: 49 [2022-07-19 15:20:46,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:20:46,518 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 32 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:46,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:46,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-07-19 15:20:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2022-07-19 15:20:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 47 transitions. [2022-07-19 15:20:46,524 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 47 transitions. Word has length 19 [2022-07-19 15:20:46,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:46,525 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 47 transitions. [2022-07-19 15:20:46,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,525 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2022-07-19 15:20:46,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 15:20:46,526 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:46,526 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:46,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 15:20:46,527 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:46,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:46,528 INFO L85 PathProgramCache]: Analyzing trace with hash 1545632287, now seen corresponding path program 1 times [2022-07-19 15:20:46,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:46,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152775783] [2022-07-19 15:20:46,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:46,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:46,564 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:20:46,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:46,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152775783] [2022-07-19 15:20:46,564 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152775783] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:20:46,565 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:20:46,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:20:46,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526311226] [2022-07-19 15:20:46,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:20:46,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 15:20:46,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:46,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 15:20:46,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:20:46,567 INFO L87 Difference]: Start difference. First operand 35 states and 47 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:46,582 INFO L93 Difference]: Finished difference Result 65 states and 87 transitions. [2022-07-19 15:20:46,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 15:20:46,583 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-19 15:20:46,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:46,584 INFO L225 Difference]: With dead ends: 65 [2022-07-19 15:20:46,584 INFO L226 Difference]: Without dead ends: 37 [2022-07-19 15:20:46,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:20:46,587 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 1 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:46,587 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:46,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-19 15:20:46,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-07-19 15:20:46,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2022-07-19 15:20:46,596 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 20 [2022-07-19 15:20:46,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:46,596 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2022-07-19 15:20:46,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,596 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2022-07-19 15:20:46,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 15:20:46,597 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:46,597 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:46,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 15:20:46,598 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:46,598 INFO L85 PathProgramCache]: Analyzing trace with hash -2031253980, now seen corresponding path program 1 times [2022-07-19 15:20:46,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:46,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407736638] [2022-07-19 15:20:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:46,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:46,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:46,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 15:20:46,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:46,634 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407736638] [2022-07-19 15:20:46,634 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407736638] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:20:46,634 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:20:46,635 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 15:20:46,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358822939] [2022-07-19 15:20:46,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:20:46,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 15:20:46,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:46,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 15:20:46,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:20:46,636 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:46,642 INFO L93 Difference]: Finished difference Result 51 states and 65 transitions. [2022-07-19 15:20:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 15:20:46,643 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-19 15:20:46,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:46,644 INFO L225 Difference]: With dead ends: 51 [2022-07-19 15:20:46,644 INFO L226 Difference]: Without dead ends: 33 [2022-07-19 15:20:46,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 15:20:46,645 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:46,646 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:46,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-07-19 15:20:46,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-07-19 15:20:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2022-07-19 15:20:46,651 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 21 [2022-07-19 15:20:46,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:46,651 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2022-07-19 15:20:46,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,652 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2022-07-19 15:20:46,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-07-19 15:20:46,652 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:46,652 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:46,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 15:20:46,653 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:46,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:46,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1130312570, now seen corresponding path program 1 times [2022-07-19 15:20:46,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:46,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654115642] [2022-07-19 15:20:46,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:46,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:46,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 15:20:46,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:46,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654115642] [2022-07-19 15:20:46,719 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654115642] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:20:46,719 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 15:20:46,719 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-19 15:20:46,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033843948] [2022-07-19 15:20:46,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:20:46,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:20:46,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:46,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:20:46,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 15:20:46,721 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:46,736 INFO L93 Difference]: Finished difference Result 39 states and 48 transitions. [2022-07-19 15:20:46,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 15:20:46,736 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-07-19 15:20:46,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:46,737 INFO L225 Difference]: With dead ends: 39 [2022-07-19 15:20:46,737 INFO L226 Difference]: Without dead ends: 30 [2022-07-19 15:20:46,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-19 15:20:46,738 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:46,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 44 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:46,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-07-19 15:20:46,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-07-19 15:20:46,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3103448275862069) internal successors, (38), 29 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2022-07-19 15:20:46,743 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2022-07-19 15:20:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:46,744 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2022-07-19 15:20:46,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,744 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2022-07-19 15:20:46,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 15:20:46,745 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:46,745 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:46,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 15:20:46,745 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:46,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:46,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1437483694, now seen corresponding path program 1 times [2022-07-19 15:20:46,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:46,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745922733] [2022-07-19 15:20:46,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:46,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:46,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:46,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 15:20:46,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:46,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745922733] [2022-07-19 15:20:46,803 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745922733] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:46,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709468910] [2022-07-19 15:20:46,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:46,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:46,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:46,813 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) [2022-07-19 15:20:46,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-19 15:20:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:46,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 15:20:46,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 15:20:46,946 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:20:46,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709468910] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:20:46,947 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:20:46,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-07-19 15:20:46,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158294129] [2022-07-19 15:20:46,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:20:46,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:20:46,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:46,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:20:46,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:20:46,948 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:46,967 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2022-07-19 15:20:46,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:20:46,972 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-19 15:20:46,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:46,972 INFO L225 Difference]: With dead ends: 37 [2022-07-19 15:20:46,972 INFO L226 Difference]: Without dead ends: 23 [2022-07-19 15:20:46,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:20:46,973 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:46,973 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 42 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:46,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-07-19 15:20:46,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-07-19 15:20:46,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-07-19 15:20:46,977 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 22 [2022-07-19 15:20:46,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:46,977 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-07-19 15:20:46,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:46,977 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-07-19 15:20:46,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-19 15:20:46,978 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:46,978 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:47,003 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:47,178 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:47,179 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:47,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:47,179 INFO L85 PathProgramCache]: Analyzing trace with hash 1965889039, now seen corresponding path program 1 times [2022-07-19 15:20:47,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:47,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51774447] [2022-07-19 15:20:47,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:47,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-19 15:20:47,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:47,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51774447] [2022-07-19 15:20:47,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51774447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:47,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838947423] [2022-07-19 15:20:47,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:47,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:47,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:47,233 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) [2022-07-19 15:20:47,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-19 15:20:47,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:47,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:20:47,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:47,368 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:20:47,370 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838947423] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:20:47,370 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:20:47,370 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2022-07-19 15:20:47,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046911660] [2022-07-19 15:20:47,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:20:47,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 15:20:47,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:47,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 15:20:47,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:20:47,373 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:47,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:47,389 INFO L93 Difference]: Finished difference Result 32 states and 38 transitions. [2022-07-19 15:20:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 15:20:47,390 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-07-19 15:20:47,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:47,392 INFO L225 Difference]: With dead ends: 32 [2022-07-19 15:20:47,394 INFO L226 Difference]: Without dead ends: 24 [2022-07-19 15:20:47,394 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-19 15:20:47,395 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:47,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 42 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:47,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-19 15:20:47,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-07-19 15:20:47,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:47,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-07-19 15:20:47,403 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 22 [2022-07-19 15:20:47,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:47,404 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-07-19 15:20:47,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:47,405 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-07-19 15:20:47,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-19 15:20:47,408 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:47,408 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:47,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:47,608 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,SelfDestructingSolverStorable8 [2022-07-19 15:20:47,609 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:47,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:47,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1829813877, now seen corresponding path program 1 times [2022-07-19 15:20:47,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:47,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40599633] [2022-07-19 15:20:47,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:47,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:47,653 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:47,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:47,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40599633] [2022-07-19 15:20:47,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40599633] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:47,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667948591] [2022-07-19 15:20:47,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:47,654 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:47,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:47,656 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) [2022-07-19 15:20:47,657 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-19 15:20:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:47,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 15:20:47,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:47,743 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:47,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 15:20:47,744 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667948591] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 15:20:47,744 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 15:20:47,744 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2022-07-19 15:20:47,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967983219] [2022-07-19 15:20:47,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 15:20:47,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 15:20:47,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:47,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 15:20:47,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:20:47,746 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:47,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:47,755 INFO L93 Difference]: Finished difference Result 31 states and 36 transitions. [2022-07-19 15:20:47,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 15:20:47,755 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2022-07-19 15:20:47,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:47,756 INFO L225 Difference]: With dead ends: 31 [2022-07-19 15:20:47,756 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 15:20:47,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-07-19 15:20:47,757 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:47,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 51 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:47,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 15:20:47,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-19 15:20:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-19 15:20:47,769 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 23 [2022-07-19 15:20:47,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:47,769 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-19 15:20:47,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-19 15:20:47,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-19 15:20:47,770 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:47,771 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:47,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:47,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:47,994 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:47,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:47,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1804048560, now seen corresponding path program 1 times [2022-07-19 15:20:47,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:47,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425545112] [2022-07-19 15:20:47,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:47,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:48,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:20:48,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:48,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425545112] [2022-07-19 15:20:48,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425545112] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:48,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124923598] [2022-07-19 15:20:48,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:48,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:48,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:48,169 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) [2022-07-19 15:20:48,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-19 15:20:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:48,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-19 15:20:48,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:20:48,474 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:48,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:20:48,631 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124923598] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:48,631 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:48,631 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2022-07-19 15:20:48,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317659969] [2022-07-19 15:20:48,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:48,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 15:20:48,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:48,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 15:20:48,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:20:48,634 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:49,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:49,041 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2022-07-19 15:20:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 15:20:49,043 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2022-07-19 15:20:49,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:49,043 INFO L225 Difference]: With dead ends: 77 [2022-07-19 15:20:49,043 INFO L226 Difference]: Without dead ends: 71 [2022-07-19 15:20:49,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 15:20:49,045 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 119 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:49,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 312 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:20:49,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-19 15:20:49,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 37. [2022-07-19 15:20:49,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 36 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:49,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2022-07-19 15:20:49,055 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 24 [2022-07-19 15:20:49,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:49,055 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2022-07-19 15:20:49,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:49,056 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2022-07-19 15:20:49,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 15:20:49,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:49,057 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:49,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:49,257 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:49,257 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:49,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:49,258 INFO L85 PathProgramCache]: Analyzing trace with hash 571706934, now seen corresponding path program 2 times [2022-07-19 15:20:49,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:49,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854661860] [2022-07-19 15:20:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:49,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:49,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:49,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:49,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854661860] [2022-07-19 15:20:49,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854661860] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:49,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47515767] [2022-07-19 15:20:49,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:20:49,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:49,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:49,318 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) [2022-07-19 15:20:49,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-19 15:20:49,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:20:49,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:20:49,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 15:20:49,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:49,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:49,433 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:49,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:49,502 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [47515767] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:49,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:49,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-19 15:20:49,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731632011] [2022-07-19 15:20:49,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:49,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 15:20:49,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:49,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 15:20:49,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:20:49,505 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:49,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:49,582 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2022-07-19 15:20:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:20:49,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-19 15:20:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:49,583 INFO L225 Difference]: With dead ends: 63 [2022-07-19 15:20:49,583 INFO L226 Difference]: Without dead ends: 53 [2022-07-19 15:20:49,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:20:49,584 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 101 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:49,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 117 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:49,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-19 15:20:49,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 44. [2022-07-19 15:20:49,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.255813953488372) internal successors, (54), 43 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:49,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2022-07-19 15:20:49,593 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 25 [2022-07-19 15:20:49,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:49,593 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2022-07-19 15:20:49,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:49,593 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2022-07-19 15:20:49,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 15:20:49,594 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:49,594 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:49,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:49,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 15:20:49,816 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:49,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:49,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1510332885, now seen corresponding path program 3 times [2022-07-19 15:20:49,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:49,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433336064] [2022-07-19 15:20:49,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:49,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:49,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:49,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:49,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433336064] [2022-07-19 15:20:49,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433336064] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:49,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636990189] [2022-07-19 15:20:49,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:20:49,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:49,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:49,858 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) [2022-07-19 15:20:49,859 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-19 15:20:49,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 15:20:49,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:20:49,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:20:49,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:49,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:49,944 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:49,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636990189] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:49,964 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:49,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-19 15:20:49,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203496968] [2022-07-19 15:20:49,964 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:49,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 15:20:49,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:49,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 15:20:49,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:20:49,966 INFO L87 Difference]: Start difference. First operand 44 states and 54 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:49,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:49,988 INFO L93 Difference]: Finished difference Result 72 states and 86 transitions. [2022-07-19 15:20:49,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 15:20:49,988 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-19 15:20:49,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:49,989 INFO L225 Difference]: With dead ends: 72 [2022-07-19 15:20:49,989 INFO L226 Difference]: Without dead ends: 60 [2022-07-19 15:20:49,989 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:20:49,990 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 29 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:49,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 99 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:49,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-19 15:20:49,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2022-07-19 15:20:50,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.2641509433962264) internal successors, (67), 53 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:50,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2022-07-19 15:20:50,000 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 25 [2022-07-19 15:20:50,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:50,001 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2022-07-19 15:20:50,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2022-07-19 15:20:50,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 15:20:50,002 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:50,002 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:50,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:50,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:50,217 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:50,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:50,217 INFO L85 PathProgramCache]: Analyzing trace with hash 595735960, now seen corresponding path program 4 times [2022-07-19 15:20:50,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:50,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314582110] [2022-07-19 15:20:50,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:50,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:50,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:50,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314582110] [2022-07-19 15:20:50,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314582110] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:50,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142307369] [2022-07-19 15:20:50,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:20:50,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:50,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:50,258 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) [2022-07-19 15:20:50,267 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-19 15:20:50,309 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:20:50,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:20:50,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 5 conjunts are in the unsatisfiable core [2022-07-19 15:20:50,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:50,346 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:50,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142307369] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:50,368 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:50,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2022-07-19 15:20:50,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123723103] [2022-07-19 15:20:50,369 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:50,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-07-19 15:20:50,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:50,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-07-19 15:20:50,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:20:50,370 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:50,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:50,399 INFO L93 Difference]: Finished difference Result 126 states and 157 transitions. [2022-07-19 15:20:50,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 15:20:50,399 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-19 15:20:50,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:50,400 INFO L225 Difference]: With dead ends: 126 [2022-07-19 15:20:50,400 INFO L226 Difference]: Without dead ends: 94 [2022-07-19 15:20:50,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-07-19 15:20:50,401 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 60 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:50,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 120 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:50,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-19 15:20:50,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 64. [2022-07-19 15:20:50,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:50,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2022-07-19 15:20:50,420 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 25 [2022-07-19 15:20:50,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:50,420 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2022-07-19 15:20:50,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:50,420 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2022-07-19 15:20:50,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-07-19 15:20:50,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:50,422 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:50,447 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:50,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:50,645 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:50,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:50,645 INFO L85 PathProgramCache]: Analyzing trace with hash 1299373655, now seen corresponding path program 5 times [2022-07-19 15:20:50,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:50,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523085404] [2022-07-19 15:20:50,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:50,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:50,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:50,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:50,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:50,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523085404] [2022-07-19 15:20:50,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523085404] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:50,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669558609] [2022-07-19 15:20:50,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:20:50,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:50,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:50,705 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) [2022-07-19 15:20:50,739 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-19 15:20:50,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:20:50,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:20:50,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 15:20:50,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:50,836 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:50,836 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:50,920 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:50,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669558609] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:50,921 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:50,921 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2022-07-19 15:20:50,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146124404] [2022-07-19 15:20:50,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:50,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 15:20:50,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:50,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 15:20:50,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:20:50,923 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:51,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:51,019 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2022-07-19 15:20:51,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 15:20:51,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2022-07-19 15:20:51,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:51,021 INFO L225 Difference]: With dead ends: 90 [2022-07-19 15:20:51,021 INFO L226 Difference]: Without dead ends: 78 [2022-07-19 15:20:51,023 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-07-19 15:20:51,024 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 78 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:51,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 214 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:51,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-19 15:20:51,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 66. [2022-07-19 15:20:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 65 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:51,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 82 transitions. [2022-07-19 15:20:51,038 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 82 transitions. Word has length 25 [2022-07-19 15:20:51,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:51,038 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 82 transitions. [2022-07-19 15:20:51,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:51,039 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 82 transitions. [2022-07-19 15:20:51,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 15:20:51,042 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:51,042 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:51,065 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:51,265 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,SelfDestructingSolverStorable14 [2022-07-19 15:20:51,266 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:51,266 INFO L85 PathProgramCache]: Analyzing trace with hash -120572194, now seen corresponding path program 6 times [2022-07-19 15:20:51,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:51,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841712803] [2022-07-19 15:20:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:51,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:51,329 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 15:20:51,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:51,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841712803] [2022-07-19 15:20:51,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841712803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:51,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6612112] [2022-07-19 15:20:51,330 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:20:51,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:51,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:51,331 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) [2022-07-19 15:20:51,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-19 15:20:51,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 15:20:51,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:20:51,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 15:20:51,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:20:51,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:51,503 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:20:51,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6612112] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:51,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:51,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-07-19 15:20:51,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808052850] [2022-07-19 15:20:51,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:51,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 15:20:51,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:51,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 15:20:51,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:20:51,505 INFO L87 Difference]: Start difference. First operand 66 states and 82 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:51,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:51,624 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2022-07-19 15:20:51,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:20:51,624 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-19 15:20:51,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:51,625 INFO L225 Difference]: With dead ends: 104 [2022-07-19 15:20:51,625 INFO L226 Difference]: Without dead ends: 79 [2022-07-19 15:20:51,625 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-07-19 15:20:51,626 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 88 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:51,626 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 137 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:51,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-07-19 15:20:51,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 67. [2022-07-19 15:20:51,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2424242424242424) internal successors, (82), 66 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:51,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2022-07-19 15:20:51,643 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 26 [2022-07-19 15:20:51,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:51,644 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2022-07-19 15:20:51,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:51,644 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2022-07-19 15:20:51,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 15:20:51,645 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:51,645 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:51,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:51,871 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,SelfDestructingSolverStorable15 [2022-07-19 15:20:51,871 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:51,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:51,872 INFO L85 PathProgramCache]: Analyzing trace with hash -2006452209, now seen corresponding path program 7 times [2022-07-19 15:20:51,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:51,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261166091] [2022-07-19 15:20:51,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:51,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:51,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:20:52,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:52,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261166091] [2022-07-19 15:20:52,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261166091] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:52,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822657617] [2022-07-19 15:20:52,052 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:20:52,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:52,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:52,056 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) [2022-07-19 15:20:52,060 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-19 15:20:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:52,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-19 15:20:52,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:20:52,311 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:52,459 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:20:52,459 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822657617] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:52,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:52,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 26 [2022-07-19 15:20:52,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124025072] [2022-07-19 15:20:52,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:52,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-19 15:20:52,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:52,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-19 15:20:52,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2022-07-19 15:20:52,461 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:52,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:52,937 INFO L93 Difference]: Finished difference Result 159 states and 188 transitions. [2022-07-19 15:20:52,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 15:20:52,938 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 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 26 [2022-07-19 15:20:52,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:52,939 INFO L225 Difference]: With dead ends: 159 [2022-07-19 15:20:52,939 INFO L226 Difference]: Without dead ends: 150 [2022-07-19 15:20:52,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 5 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=1433, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 15:20:52,940 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 130 mSDsluCounter, 550 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:52,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 584 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:20:52,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-07-19 15:20:52,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2022-07-19 15:20:52,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.2528735632183907) internal successors, (109), 87 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:52,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-07-19 15:20:52,954 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 26 [2022-07-19 15:20:52,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:52,955 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-07-19 15:20:52,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:52,955 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-07-19 15:20:52,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 15:20:52,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:52,957 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:52,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:53,183 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,SelfDestructingSolverStorable16 [2022-07-19 15:20:53,184 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:53,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:53,184 INFO L85 PathProgramCache]: Analyzing trace with hash -216163038, now seen corresponding path program 8 times [2022-07-19 15:20:53,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:53,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706082286] [2022-07-19 15:20:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:53,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:53,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 15:20:53,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:53,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706082286] [2022-07-19 15:20:53,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1706082286] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:53,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137514820] [2022-07-19 15:20:53,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:20:53,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:53,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:53,251 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) [2022-07-19 15:20:53,259 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-19 15:20:53,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:20:53,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:20:53,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 15:20:53,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:20:53,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:53,439 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:20:53,439 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137514820] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:53,439 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:53,439 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2022-07-19 15:20:53,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873653318] [2022-07-19 15:20:53,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:53,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 15:20:53,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:53,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 15:20:53,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:20:53,441 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:53,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:53,557 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2022-07-19 15:20:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:20:53,557 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-19 15:20:53,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:53,558 INFO L225 Difference]: With dead ends: 107 [2022-07-19 15:20:53,558 INFO L226 Difference]: Without dead ends: 92 [2022-07-19 15:20:53,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2022-07-19 15:20:53,559 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 121 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 101 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:53,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 254 Invalid, 101 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:53,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-19 15:20:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 86. [2022-07-19 15:20:53,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.223529411764706) internal successors, (104), 85 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 104 transitions. [2022-07-19 15:20:53,573 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 104 transitions. Word has length 26 [2022-07-19 15:20:53,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:53,574 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 104 transitions. [2022-07-19 15:20:53,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 104 transitions. [2022-07-19 15:20:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 15:20:53,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:53,574 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:53,600 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:53,791 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,SelfDestructingSolverStorable17 [2022-07-19 15:20:53,791 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:53,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:53,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1407838889, now seen corresponding path program 9 times [2022-07-19 15:20:53,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:53,792 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101663425] [2022-07-19 15:20:53,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:53,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:53,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:53,868 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:53,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:53,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101663425] [2022-07-19 15:20:53,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101663425] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:53,869 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091353430] [2022-07-19 15:20:53,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:20:53,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:53,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:53,871 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) [2022-07-19 15:20:53,872 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-19 15:20:53,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 15:20:53,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:20:53,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 15:20:53,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:54,074 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:54,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:54,172 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091353430] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:54,173 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:54,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 15:20:54,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079504044] [2022-07-19 15:20:54,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:54,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 15:20:54,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:54,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 15:20:54,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-07-19 15:20:54,176 INFO L87 Difference]: Start difference. First operand 86 states and 104 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:54,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:54,480 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2022-07-19 15:20:54,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 15:20:54,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 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 27 [2022-07-19 15:20:54,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:54,482 INFO L225 Difference]: With dead ends: 131 [2022-07-19 15:20:54,482 INFO L226 Difference]: Without dead ends: 107 [2022-07-19 15:20:54,482 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2022-07-19 15:20:54,483 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 170 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:54,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [170 Valid, 305 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:20:54,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-07-19 15:20:54,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 83. [2022-07-19 15:20:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.2317073170731707) internal successors, (101), 82 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:54,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2022-07-19 15:20:54,503 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 27 [2022-07-19 15:20:54,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:54,504 INFO L495 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2022-07-19 15:20:54,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:54,504 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2022-07-19 15:20:54,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 15:20:54,505 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:54,505 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:54,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:54,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:54,719 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:54,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:54,720 INFO L85 PathProgramCache]: Analyzing trace with hash -325007018, now seen corresponding path program 10 times [2022-07-19 15:20:54,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:54,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502045846] [2022-07-19 15:20:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:54,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:54,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:54,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:54,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502045846] [2022-07-19 15:20:54,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502045846] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:54,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143039838] [2022-07-19 15:20:54,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:20:54,791 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:54,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:54,792 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) [2022-07-19 15:20:54,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-19 15:20:54,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:20:54,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:20:54,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 15:20:54,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:54,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:55,108 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:55,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143039838] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:55,108 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:55,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2022-07-19 15:20:55,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520776258] [2022-07-19 15:20:55,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:55,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 15:20:55,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:55,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 15:20:55,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-07-19 15:20:55,109 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:55,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:55,339 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2022-07-19 15:20:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-07-19 15:20:55,340 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 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 27 [2022-07-19 15:20:55,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:55,340 INFO L225 Difference]: With dead ends: 121 [2022-07-19 15:20:55,341 INFO L226 Difference]: Without dead ends: 109 [2022-07-19 15:20:55,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-07-19 15:20:55,342 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 216 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:55,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 488 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:20:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-19 15:20:55,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2022-07-19 15:20:55,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.2261904761904763) internal successors, (103), 84 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:55,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 103 transitions. [2022-07-19 15:20:55,364 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 103 transitions. Word has length 27 [2022-07-19 15:20:55,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:55,364 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 103 transitions. [2022-07-19 15:20:55,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:55,365 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2022-07-19 15:20:55,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 15:20:55,365 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:55,365 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:55,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:55,588 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,SelfDestructingSolverStorable19 [2022-07-19 15:20:55,588 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:55,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:55,589 INFO L85 PathProgramCache]: Analyzing trace with hash 480362644, now seen corresponding path program 11 times [2022-07-19 15:20:55,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:55,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063847420] [2022-07-19 15:20:55,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:55,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:55,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:55,639 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:20:55,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:55,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063847420] [2022-07-19 15:20:55,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063847420] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:55,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [85919040] [2022-07-19 15:20:55,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:20:55,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:55,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:55,642 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) [2022-07-19 15:20:55,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-19 15:20:55,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:20:55,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:20:55,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 15:20:55,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:20:55,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:55,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:20:55,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [85919040] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:55,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:55,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-19 15:20:55,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863538586] [2022-07-19 15:20:55,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:55,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 15:20:55,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:55,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 15:20:55,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:20:55,732 INFO L87 Difference]: Start difference. First operand 85 states and 103 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:55,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:55,777 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2022-07-19 15:20:55,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:20:55,778 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 27 [2022-07-19 15:20:55,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:55,778 INFO L225 Difference]: With dead ends: 110 [2022-07-19 15:20:55,778 INFO L226 Difference]: Without dead ends: 77 [2022-07-19 15:20:55,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:20:55,779 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 67 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:55,780 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 149 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:55,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-07-19 15:20:55,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 71. [2022-07-19 15:20:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2022-07-19 15:20:55,795 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 27 [2022-07-19 15:20:55,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:55,795 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2022-07-19 15:20:55,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:55,796 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2022-07-19 15:20:55,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 15:20:55,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:55,796 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:55,824 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:56,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:56,011 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:56,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:56,012 INFO L85 PathProgramCache]: Analyzing trace with hash 400247189, now seen corresponding path program 12 times [2022-07-19 15:20:56,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:56,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121324877] [2022-07-19 15:20:56,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:56,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:56,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:56,047 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:20:56,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:56,047 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121324877] [2022-07-19 15:20:56,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121324877] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:56,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697860017] [2022-07-19 15:20:56,048 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:20:56,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:56,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:56,049 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) [2022-07-19 15:20:56,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-19 15:20:56,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-07-19 15:20:56,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:20:56,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 15:20:56,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:56,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:20:56,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:56,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:20:56,158 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1697860017] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:56,158 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:56,158 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-19 15:20:56,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115536437] [2022-07-19 15:20:56,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:56,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-19 15:20:56,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:56,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-19 15:20:56,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-07-19 15:20:56,160 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:56,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:56,203 INFO L93 Difference]: Finished difference Result 84 states and 97 transitions. [2022-07-19 15:20:56,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-19 15:20:56,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 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 27 [2022-07-19 15:20:56,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:56,206 INFO L225 Difference]: With dead ends: 84 [2022-07-19 15:20:56,206 INFO L226 Difference]: Without dead ends: 78 [2022-07-19 15:20:56,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2022-07-19 15:20:56,207 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:56,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 149 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:20:56,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-07-19 15:20:56,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2022-07-19 15:20:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 71 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:56,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 86 transitions. [2022-07-19 15:20:56,222 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 86 transitions. Word has length 27 [2022-07-19 15:20:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:56,222 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 86 transitions. [2022-07-19 15:20:56,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:56,223 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 86 transitions. [2022-07-19 15:20:56,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 15:20:56,223 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:56,223 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:56,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:56,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:56,439 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:56,440 INFO L85 PathProgramCache]: Analyzing trace with hash -822645520, now seen corresponding path program 13 times [2022-07-19 15:20:56,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:56,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586129364] [2022-07-19 15:20:56,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:56,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:56,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:56,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:20:56,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:56,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586129364] [2022-07-19 15:20:56,630 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586129364] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:56,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134403560] [2022-07-19 15:20:56,630 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:20:56,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:56,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:56,631 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) [2022-07-19 15:20:56,632 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-19 15:20:56,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:56,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 15:20:56,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:20:56,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:20:57,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134403560] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:57,086 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:57,086 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 29 [2022-07-19 15:20:57,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898899393] [2022-07-19 15:20:57,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:57,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 15:20:57,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:57,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 15:20:57,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=741, Unknown=0, NotChecked=0, Total=812 [2022-07-19 15:20:57,088 INFO L87 Difference]: Start difference. First operand 72 states and 86 transitions. Second operand has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:57,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:57,658 INFO L93 Difference]: Finished difference Result 149 states and 168 transitions. [2022-07-19 15:20:57,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 15:20:57,659 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 15:20:57,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:57,660 INFO L225 Difference]: With dead ends: 149 [2022-07-19 15:20:57,660 INFO L226 Difference]: Without dead ends: 140 [2022-07-19 15:20:57,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 40 SyntacticMatches, 5 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=1844, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 15:20:57,661 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 147 mSDsluCounter, 856 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:57,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 905 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:20:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-19 15:20:57,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 81. [2022-07-19 15:20:57,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2) internal successors, (96), 80 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:57,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 96 transitions. [2022-07-19 15:20:57,679 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 96 transitions. Word has length 28 [2022-07-19 15:20:57,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:57,679 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 96 transitions. [2022-07-19 15:20:57,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.6551724137931034) internal successors, (48), 29 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:57,679 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 96 transitions. [2022-07-19 15:20:57,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-19 15:20:57,680 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:57,680 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:57,705 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-19 15:20:57,895 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,SelfDestructingSolverStorable22 [2022-07-19 15:20:57,895 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:57,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:57,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1124024368, now seen corresponding path program 14 times [2022-07-19 15:20:57,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:57,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626492659] [2022-07-19 15:20:57,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:57,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:57,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:20:58,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:58,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626492659] [2022-07-19 15:20:58,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626492659] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:58,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353003769] [2022-07-19 15:20:58,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:20:58,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:58,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:58,088 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) [2022-07-19 15:20:58,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-19 15:20:58,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:20:58,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:20:58,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-19 15:20:58,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:20:58,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:20:58,485 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353003769] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:58,485 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:58,485 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 27 [2022-07-19 15:20:58,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753617965] [2022-07-19 15:20:58,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:58,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-19 15:20:58,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:58,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-19 15:20:58,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=632, Unknown=0, NotChecked=0, Total=702 [2022-07-19 15:20:58,487 INFO L87 Difference]: Start difference. First operand 81 states and 96 transitions. Second operand has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:58,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:20:58,930 INFO L93 Difference]: Finished difference Result 118 states and 135 transitions. [2022-07-19 15:20:58,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 15:20:58,931 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2022-07-19 15:20:58,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:20:58,931 INFO L225 Difference]: With dead ends: 118 [2022-07-19 15:20:58,931 INFO L226 Difference]: Without dead ends: 112 [2022-07-19 15:20:58,932 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=205, Invalid=1435, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 15:20:58,932 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 105 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:20:58,933 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 437 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:20:58,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-07-19 15:20:58,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 91. [2022-07-19 15:20:58,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.2) internal successors, (108), 90 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:58,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2022-07-19 15:20:58,959 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 28 [2022-07-19 15:20:58,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:20:58,959 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2022-07-19 15:20:58,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.7407407407407407) internal successors, (47), 27 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:20:58,960 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2022-07-19 15:20:58,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 15:20:58,960 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:20:58,960 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:20:58,989 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2022-07-19 15:20:59,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:59,175 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:20:59,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:20:59,176 INFO L85 PathProgramCache]: Analyzing trace with hash 930430102, now seen corresponding path program 15 times [2022-07-19 15:20:59,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:20:59,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677467215] [2022-07-19 15:20:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:20:59,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:20:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:20:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:59,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:20:59,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677467215] [2022-07-19 15:20:59,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677467215] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:20:59,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329877983] [2022-07-19 15:20:59,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:20:59,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:20:59,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:20:59,270 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) [2022-07-19 15:20:59,272 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-19 15:20:59,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 15:20:59,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:20:59,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 15:20:59,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:20:59,495 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:59,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:20:59,627 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:20:59,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329877983] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:20:59,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:20:59,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-19 15:20:59,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016250522] [2022-07-19 15:20:59,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:20:59,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 15:20:59,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:20:59,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 15:20:59,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-07-19 15:20:59,629 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:00,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:00,194 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2022-07-19 15:21:00,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 15:21:00,195 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-19 15:21:00,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:00,195 INFO L225 Difference]: With dead ends: 155 [2022-07-19 15:21:00,195 INFO L226 Difference]: Without dead ends: 129 [2022-07-19 15:21:00,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=363, Invalid=1277, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 15:21:00,197 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 375 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:00,197 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 462 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:21:00,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-19 15:21:00,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 94. [2022-07-19 15:21:00,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.2150537634408602) internal successors, (113), 93 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:00,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 113 transitions. [2022-07-19 15:21:00,223 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 113 transitions. Word has length 29 [2022-07-19 15:21:00,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:00,223 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 113 transitions. [2022-07-19 15:21:00,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:00,224 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 113 transitions. [2022-07-19 15:21:00,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 15:21:00,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:00,224 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:00,249 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:00,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:00,443 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:00,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:00,444 INFO L85 PathProgramCache]: Analyzing trace with hash 138479735, now seen corresponding path program 16 times [2022-07-19 15:21:00,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:00,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981883791] [2022-07-19 15:21:00,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:00,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:00,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:00,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:00,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:00,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981883791] [2022-07-19 15:21:00,537 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981883791] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:00,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599203298] [2022-07-19 15:21:00,537 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:21:00,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:00,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:00,538 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) [2022-07-19 15:21:00,539 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-19 15:21:00,573 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:21:00,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:00,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 15:21:00,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:00,754 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:00,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:00,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:00,889 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599203298] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:00,889 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:00,889 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 24 [2022-07-19 15:21:00,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161468122] [2022-07-19 15:21:00,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:00,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-19 15:21:00,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:00,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-19 15:21:00,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-07-19 15:21:00,891 INFO L87 Difference]: Start difference. First operand 94 states and 113 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:01,253 INFO L93 Difference]: Finished difference Result 144 states and 165 transitions. [2022-07-19 15:21:01,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 15:21:01,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-19 15:21:01,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:01,256 INFO L225 Difference]: With dead ends: 144 [2022-07-19 15:21:01,256 INFO L226 Difference]: Without dead ends: 131 [2022-07-19 15:21:01,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=909, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 15:21:01,257 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 319 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 880 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:01,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 880 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:21:01,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-19 15:21:01,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 96. [2022-07-19 15:21:01,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.2105263157894737) internal successors, (115), 95 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 115 transitions. [2022-07-19 15:21:01,281 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 115 transitions. Word has length 29 [2022-07-19 15:21:01,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:01,281 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 115 transitions. [2022-07-19 15:21:01,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:01,281 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 115 transitions. [2022-07-19 15:21:01,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 15:21:01,282 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:01,282 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:01,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:01,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:01,495 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:01,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:01,496 INFO L85 PathProgramCache]: Analyzing trace with hash 2086280437, now seen corresponding path program 17 times [2022-07-19 15:21:01,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:01,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342813540] [2022-07-19 15:21:01,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:01,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:21:01,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:01,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342813540] [2022-07-19 15:21:01,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342813540] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:01,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061806085] [2022-07-19 15:21:01,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:21:01,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:01,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:01,548 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) [2022-07-19 15:21:01,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-19 15:21:01,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 15:21:01,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:01,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:21:01,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:21:01,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:01,648 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:21:01,648 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061806085] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:01,649 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:01,649 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-19 15:21:01,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362205370] [2022-07-19 15:21:01,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:01,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 15:21:01,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:01,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 15:21:01,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:21:01,650 INFO L87 Difference]: Start difference. First operand 96 states and 115 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:01,711 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2022-07-19 15:21:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 15:21:01,711 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-19 15:21:01,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:01,712 INFO L225 Difference]: With dead ends: 139 [2022-07-19 15:21:01,712 INFO L226 Difference]: Without dead ends: 126 [2022-07-19 15:21:01,712 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-07-19 15:21:01,712 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 69 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:01,713 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 127 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:21:01,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-19 15:21:01,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 112. [2022-07-19 15:21:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.2252252252252251) internal successors, (136), 111 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:01,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2022-07-19 15:21:01,741 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 29 [2022-07-19 15:21:01,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:01,741 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2022-07-19 15:21:01,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:01,741 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2022-07-19 15:21:01,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-19 15:21:01,742 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:01,742 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:01,759 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:01,943 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,SelfDestructingSolverStorable26 [2022-07-19 15:21:01,944 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:01,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:01,944 INFO L85 PathProgramCache]: Analyzing trace with hash -397298668, now seen corresponding path program 18 times [2022-07-19 15:21:01,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:01,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109973109] [2022-07-19 15:21:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:01,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:01,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:21:01,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:01,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109973109] [2022-07-19 15:21:01,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109973109] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:01,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523562390] [2022-07-19 15:21:01,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:21:01,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:01,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:01,988 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) [2022-07-19 15:21:01,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-19 15:21:02,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-19 15:21:02,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:02,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 7 conjunts are in the unsatisfiable core [2022-07-19 15:21:02,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:21:02,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-07-19 15:21:02,074 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523562390] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:02,074 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:02,074 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 13 [2022-07-19 15:21:02,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433065849] [2022-07-19 15:21:02,074 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:02,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 15:21:02,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:02,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 15:21:02,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2022-07-19 15:21:02,076 INFO L87 Difference]: Start difference. First operand 112 states and 136 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:02,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:02,158 INFO L93 Difference]: Finished difference Result 262 states and 317 transitions. [2022-07-19 15:21:02,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 15:21:02,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2022-07-19 15:21:02,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:02,159 INFO L225 Difference]: With dead ends: 262 [2022-07-19 15:21:02,159 INFO L226 Difference]: Without dead ends: 202 [2022-07-19 15:21:02,160 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2022-07-19 15:21:02,160 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 106 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:02,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 232 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:21:02,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2022-07-19 15:21:02,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 134. [2022-07-19 15:21:02,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.2255639097744362) internal successors, (163), 133 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:02,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 163 transitions. [2022-07-19 15:21:02,201 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 163 transitions. Word has length 29 [2022-07-19 15:21:02,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:02,201 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 163 transitions. [2022-07-19 15:21:02,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 13 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:02,201 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 163 transitions. [2022-07-19 15:21:02,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 15:21:02,202 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:02,202 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] [2022-07-19 15:21:02,219 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:02,406 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,SelfDestructingSolverStorable27 [2022-07-19 15:21:02,407 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:02,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:02,407 INFO L85 PathProgramCache]: Analyzing trace with hash 660541935, now seen corresponding path program 19 times [2022-07-19 15:21:02,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:02,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765334367] [2022-07-19 15:21:02,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:02,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:02,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:02,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765334367] [2022-07-19 15:21:02,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765334367] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:02,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923060476] [2022-07-19 15:21:02,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:21:02,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:02,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:02,612 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) [2022-07-19 15:21:02,612 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-19 15:21:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:02,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 15:21:02,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:02,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:03,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923060476] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:03,023 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:03,023 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 32 [2022-07-19 15:21:03,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159818204] [2022-07-19 15:21:03,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:03,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-19 15:21:03,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-19 15:21:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=914, Unknown=0, NotChecked=0, Total=992 [2022-07-19 15:21:03,024 INFO L87 Difference]: Start difference. First operand 134 states and 163 transitions. Second operand has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:03,660 INFO L93 Difference]: Finished difference Result 258 states and 295 transitions. [2022-07-19 15:21:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 15:21:03,660 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-19 15:21:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:03,661 INFO L225 Difference]: With dead ends: 258 [2022-07-19 15:21:03,661 INFO L226 Difference]: Without dead ends: 249 [2022-07-19 15:21:03,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 5 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=245, Invalid=2305, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 15:21:03,662 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 169 mSDsluCounter, 1239 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:03,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 1305 Invalid, 693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:21:03,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-07-19 15:21:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 143. [2022-07-19 15:21:03,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.2183098591549295) internal successors, (173), 142 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:03,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 173 transitions. [2022-07-19 15:21:03,708 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 173 transitions. Word has length 30 [2022-07-19 15:21:03,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:03,708 INFO L495 AbstractCegarLoop]: Abstraction has 143 states and 173 transitions. [2022-07-19 15:21:03,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.59375) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:03,708 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 173 transitions. [2022-07-19 15:21:03,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 15:21:03,709 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:03,709 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:03,728 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:03,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-19 15:21:03,919 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:03,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:03,920 INFO L85 PathProgramCache]: Analyzing trace with hash 283195298, now seen corresponding path program 20 times [2022-07-19 15:21:03,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:03,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435686012] [2022-07-19 15:21:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:03,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 15:21:04,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:04,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435686012] [2022-07-19 15:21:04,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435686012] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:04,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127953375] [2022-07-19 15:21:04,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:21:04,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:04,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:04,005 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) [2022-07-19 15:21:04,023 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-19 15:21:04,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:21:04,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:04,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 15:21:04,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 15:21:04,160 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 15:21:04,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127953375] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:04,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:04,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-07-19 15:21:04,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758822595] [2022-07-19 15:21:04,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:04,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 15:21:04,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:04,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 15:21:04,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-07-19 15:21:04,259 INFO L87 Difference]: Start difference. First operand 143 states and 173 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:04,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:04,584 INFO L93 Difference]: Finished difference Result 217 states and 254 transitions. [2022-07-19 15:21:04,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 15:21:04,584 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-19 15:21:04,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:04,585 INFO L225 Difference]: With dead ends: 217 [2022-07-19 15:21:04,585 INFO L226 Difference]: Without dead ends: 181 [2022-07-19 15:21:04,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=715, Unknown=0, NotChecked=0, Total=930 [2022-07-19 15:21:04,586 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 255 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:04,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [255 Valid, 324 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:21:04,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-07-19 15:21:04,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 154. [2022-07-19 15:21:04,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.196078431372549) internal successors, (183), 153 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 183 transitions. [2022-07-19 15:21:04,624 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 183 transitions. Word has length 30 [2022-07-19 15:21:04,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:04,625 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 183 transitions. [2022-07-19 15:21:04,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:04,625 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 183 transitions. [2022-07-19 15:21:04,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 15:21:04,625 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:04,626 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:04,642 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:04,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:04,826 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:04,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:04,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1226887537, now seen corresponding path program 21 times [2022-07-19 15:21:04,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:04,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260965669] [2022-07-19 15:21:04,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:04,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:04,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:05,001 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:05,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:05,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260965669] [2022-07-19 15:21:05,002 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [260965669] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:05,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116216191] [2022-07-19 15:21:05,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:21:05,003 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:05,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:05,004 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:05,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-19 15:21:05,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-19 15:21:05,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:05,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 15:21:05,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:05,255 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:05,255 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:05,407 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:05,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116216191] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:05,407 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:05,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 30 [2022-07-19 15:21:05,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088715066] [2022-07-19 15:21:05,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:05,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 15:21:05,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:05,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 15:21:05,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2022-07-19 15:21:05,409 INFO L87 Difference]: Start difference. First operand 154 states and 183 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:05,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:05,914 INFO L93 Difference]: Finished difference Result 226 states and 258 transitions. [2022-07-19 15:21:05,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 15:21:05,914 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-19 15:21:05,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:05,915 INFO L225 Difference]: With dead ends: 226 [2022-07-19 15:21:05,915 INFO L226 Difference]: Without dead ends: 204 [2022-07-19 15:21:05,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=1847, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 15:21:05,916 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 111 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 456 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 456 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:05,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 743 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 456 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:21:05,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-19 15:21:05,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 153. [2022-07-19 15:21:05,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.2039473684210527) internal successors, (183), 152 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:05,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 183 transitions. [2022-07-19 15:21:05,954 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 183 transitions. Word has length 30 [2022-07-19 15:21:05,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:05,954 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 183 transitions. [2022-07-19 15:21:05,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:05,954 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 183 transitions. [2022-07-19 15:21:05,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-19 15:21:05,955 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:05,955 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:05,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:06,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:06,159 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:06,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:06,160 INFO L85 PathProgramCache]: Analyzing trace with hash 628770462, now seen corresponding path program 22 times [2022-07-19 15:21:06,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:06,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679150691] [2022-07-19 15:21:06,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:06,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 15:21:06,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:06,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679150691] [2022-07-19 15:21:06,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679150691] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:06,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943175176] [2022-07-19 15:21:06,256 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:21:06,256 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:06,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:06,258 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:06,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-19 15:21:06,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:21:06,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:06,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-19 15:21:06,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:06,414 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 15:21:06,414 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-07-19 15:21:06,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943175176] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:06,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:06,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2022-07-19 15:21:06,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326507255] [2022-07-19 15:21:06,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:06,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 15:21:06,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:06,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 15:21:06,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2022-07-19 15:21:06,499 INFO L87 Difference]: Start difference. First operand 153 states and 183 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:06,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:06,756 INFO L93 Difference]: Finished difference Result 186 states and 214 transitions. [2022-07-19 15:21:06,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-19 15:21:06,757 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2022-07-19 15:21:06,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:06,757 INFO L225 Difference]: With dead ends: 186 [2022-07-19 15:21:06,757 INFO L226 Difference]: Without dead ends: 167 [2022-07-19 15:21:06,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2022-07-19 15:21:06,758 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 239 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:06,759 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 580 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:21:06,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-07-19 15:21:06,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 153. [2022-07-19 15:21:06,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.1776315789473684) internal successors, (179), 152 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:06,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 179 transitions. [2022-07-19 15:21:06,799 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 179 transitions. Word has length 30 [2022-07-19 15:21:06,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:06,799 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 179 transitions. [2022-07-19 15:21:06,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:06,799 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 179 transitions. [2022-07-19 15:21:06,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 15:21:06,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:06,800 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:06,816 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-19 15:21:07,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2022-07-19 15:21:07,003 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:07,004 INFO L85 PathProgramCache]: Analyzing trace with hash -335399049, now seen corresponding path program 23 times [2022-07-19 15:21:07,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:07,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156546110] [2022-07-19 15:21:07,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:07,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:07,113 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:07,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:07,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156546110] [2022-07-19 15:21:07,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156546110] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:07,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027683095] [2022-07-19 15:21:07,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:21:07,114 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:07,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:07,115 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:07,116 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-19 15:21:07,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 15:21:07,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:07,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 15:21:07,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:07,383 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:07,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:07,543 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:07,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027683095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:07,544 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:07,544 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-07-19 15:21:07,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583895173] [2022-07-19 15:21:07,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:07,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 15:21:07,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:07,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 15:21:07,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2022-07-19 15:21:07,547 INFO L87 Difference]: Start difference. First operand 153 states and 179 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:08,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:08,404 INFO L93 Difference]: Finished difference Result 263 states and 298 transitions. [2022-07-19 15:21:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 15:21:08,405 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-19 15:21:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:08,405 INFO L225 Difference]: With dead ends: 263 [2022-07-19 15:21:08,405 INFO L226 Difference]: Without dead ends: 233 [2022-07-19 15:21:08,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=617, Invalid=2245, Unknown=0, NotChecked=0, Total=2862 [2022-07-19 15:21:08,406 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 657 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 657 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:08,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [657 Valid, 635 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:21:08,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-19 15:21:08,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 168. [2022-07-19 15:21:08,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1796407185628743) internal successors, (197), 167 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 197 transitions. [2022-07-19 15:21:08,453 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 197 transitions. Word has length 31 [2022-07-19 15:21:08,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:08,453 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 197 transitions. [2022-07-19 15:21:08,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:08,453 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 197 transitions. [2022-07-19 15:21:08,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 15:21:08,453 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:08,454 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:08,470 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:08,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2022-07-19 15:21:08,654 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:08,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:08,654 INFO L85 PathProgramCache]: Analyzing trace with hash 883943350, now seen corresponding path program 24 times [2022-07-19 15:21:08,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:08,655 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730304183] [2022-07-19 15:21:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:08,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:08,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:08,773 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:08,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:08,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730304183] [2022-07-19 15:21:08,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730304183] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:08,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055849806] [2022-07-19 15:21:08,774 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:21:08,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:08,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:08,776 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:08,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-19 15:21:08,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 15:21:08,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:08,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 15:21:08,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:09,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:09,276 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:09,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055849806] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:09,276 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:09,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 29 [2022-07-19 15:21:09,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661725793] [2022-07-19 15:21:09,277 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:09,277 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-19 15:21:09,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:09,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-19 15:21:09,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2022-07-19 15:21:09,278 INFO L87 Difference]: Start difference. First operand 168 states and 197 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:09,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:09,827 INFO L93 Difference]: Finished difference Result 251 states and 283 transitions. [2022-07-19 15:21:09,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 15:21:09,828 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-19 15:21:09,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:09,829 INFO L225 Difference]: With dead ends: 251 [2022-07-19 15:21:09,829 INFO L226 Difference]: Without dead ends: 236 [2022-07-19 15:21:09,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=201, Invalid=1439, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 15:21:09,830 INFO L413 NwaCegarLoop]: 84 mSDtfsCounter, 483 mSDsluCounter, 1158 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 1242 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:09,831 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 1242 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:21:09,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-07-19 15:21:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 171. [2022-07-19 15:21:09,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.1764705882352942) internal successors, (200), 170 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 200 transitions. [2022-07-19 15:21:09,900 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 200 transitions. Word has length 31 [2022-07-19 15:21:09,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:09,900 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 200 transitions. [2022-07-19 15:21:09,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:09,901 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 200 transitions. [2022-07-19 15:21:09,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 15:21:09,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:09,901 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:09,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:10,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:10,115 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:10,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:10,116 INFO L85 PathProgramCache]: Analyzing trace with hash 2026567256, now seen corresponding path program 25 times [2022-07-19 15:21:10,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:10,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252404905] [2022-07-19 15:21:10,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:10,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:10,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 15:21:10,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:10,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252404905] [2022-07-19 15:21:10,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252404905] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:10,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836944743] [2022-07-19 15:21:10,165 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:21:10,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:10,165 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:10,166 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:10,197 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-19 15:21:10,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:10,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 15:21:10,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:10,266 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 15:21:10,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:10,290 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 15:21:10,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836944743] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:10,291 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:10,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-19 15:21:10,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520561203] [2022-07-19 15:21:10,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:10,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 15:21:10,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:10,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 15:21:10,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:21:10,292 INFO L87 Difference]: Start difference. First operand 171 states and 200 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:10,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:10,413 INFO L93 Difference]: Finished difference Result 227 states and 261 transitions. [2022-07-19 15:21:10,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 15:21:10,413 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-19 15:21:10,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:10,414 INFO L225 Difference]: With dead ends: 227 [2022-07-19 15:21:10,414 INFO L226 Difference]: Without dead ends: 171 [2022-07-19 15:21:10,415 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:21:10,415 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:10,415 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 206 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:21:10,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-07-19 15:21:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 157. [2022-07-19 15:21:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.1666666666666667) internal successors, (182), 156 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:10,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 182 transitions. [2022-07-19 15:21:10,459 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 182 transitions. Word has length 31 [2022-07-19 15:21:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:10,459 INFO L495 AbstractCegarLoop]: Abstraction has 157 states and 182 transitions. [2022-07-19 15:21:10,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:10,460 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 182 transitions. [2022-07-19 15:21:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-19 15:21:10,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:10,460 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:10,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:10,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:10,671 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:10,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:10,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1679203531, now seen corresponding path program 26 times [2022-07-19 15:21:10,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:10,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722432841] [2022-07-19 15:21:10,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:10,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:10,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:10,720 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 15:21:10,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:10,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722432841] [2022-07-19 15:21:10,721 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722432841] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:10,721 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689494397] [2022-07-19 15:21:10,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:21:10,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:10,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:10,722 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:10,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-19 15:21:10,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:21:10,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:10,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-19 15:21:10,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:10,811 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 15:21:10,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 15:21:10,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689494397] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:10,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:10,835 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-19 15:21:10,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211268985] [2022-07-19 15:21:10,835 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:10,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-19 15:21:10,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:10,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-19 15:21:10,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2022-07-19 15:21:10,836 INFO L87 Difference]: Start difference. First operand 157 states and 182 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:10,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:10,952 INFO L93 Difference]: Finished difference Result 178 states and 201 transitions. [2022-07-19 15:21:10,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-19 15:21:10,952 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2022-07-19 15:21:10,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:10,953 INFO L225 Difference]: With dead ends: 178 [2022-07-19 15:21:10,953 INFO L226 Difference]: Without dead ends: 172 [2022-07-19 15:21:10,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:21:10,954 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 33 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:10,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 237 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:21:10,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2022-07-19 15:21:11,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 158. [2022-07-19 15:21:11,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:11,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2022-07-19 15:21:11,015 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 31 [2022-07-19 15:21:11,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:11,015 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2022-07-19 15:21:11,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:11,016 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2022-07-19 15:21:11,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 15:21:11,016 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:11,016 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:11,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:11,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:11,229 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:11,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:11,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1999889776, now seen corresponding path program 27 times [2022-07-19 15:21:11,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:11,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777342100] [2022-07-19 15:21:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:11,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:11,503 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:11,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:11,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777342100] [2022-07-19 15:21:11,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777342100] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:11,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541329384] [2022-07-19 15:21:11,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:21:11,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:11,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:11,505 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:11,505 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-19 15:21:11,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 15:21:11,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:11,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 15:21:11,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:11,813 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:11,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:11,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541329384] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:11,971 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:11,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 35 [2022-07-19 15:21:11,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880473586] [2022-07-19 15:21:11,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:11,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 15:21:11,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:11,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 15:21:11,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1105, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 15:21:11,973 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:12,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:12,831 INFO L93 Difference]: Finished difference Result 305 states and 337 transitions. [2022-07-19 15:21:12,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 15:21:12,831 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-19 15:21:12,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:12,832 INFO L225 Difference]: With dead ends: 305 [2022-07-19 15:21:12,832 INFO L226 Difference]: Without dead ends: 296 [2022-07-19 15:21:12,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 46 SyntacticMatches, 5 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=264, Invalid=2816, Unknown=0, NotChecked=0, Total=3080 [2022-07-19 15:21:12,833 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 196 mSDsluCounter, 1773 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 1856 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:12,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 1856 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:21:12,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-07-19 15:21:12,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 167. [2022-07-19 15:21:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.1626506024096386) internal successors, (193), 166 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 193 transitions. [2022-07-19 15:21:12,887 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 193 transitions. Word has length 32 [2022-07-19 15:21:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:12,887 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 193 transitions. [2022-07-19 15:21:12,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.542857142857143) internal successors, (54), 35 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:12,887 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 193 transitions. [2022-07-19 15:21:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 15:21:12,888 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:12,888 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:12,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:13,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-07-19 15:21:13,111 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:13,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:13,112 INFO L85 PathProgramCache]: Analyzing trace with hash -120192688, now seen corresponding path program 28 times [2022-07-19 15:21:13,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:13,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231260335] [2022-07-19 15:21:13,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:13,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:13,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:13,335 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:13,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:13,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231260335] [2022-07-19 15:21:13,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231260335] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:13,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720456277] [2022-07-19 15:21:13,336 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:21:13,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:13,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:13,337 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:13,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-19 15:21:13,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:21:13,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:13,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 15:21:13,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:13,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:13,830 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:13,830 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720456277] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:13,830 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:13,831 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 33 [2022-07-19 15:21:13,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857424389] [2022-07-19 15:21:13,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:13,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-19 15:21:13,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:13,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-19 15:21:13,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=972, Unknown=0, NotChecked=0, Total=1056 [2022-07-19 15:21:13,832 INFO L87 Difference]: Start difference. First operand 167 states and 193 transitions. Second operand has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:14,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:14,425 INFO L93 Difference]: Finished difference Result 223 states and 248 transitions. [2022-07-19 15:21:14,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 15:21:14,425 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-19 15:21:14,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:14,426 INFO L225 Difference]: With dead ends: 223 [2022-07-19 15:21:14,426 INFO L226 Difference]: Without dead ends: 200 [2022-07-19 15:21:14,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 15:21:14,427 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 118 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 1047 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:14,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 1047 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:21:14,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-07-19 15:21:14,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 158. [2022-07-19 15:21:14,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1656050955414012) internal successors, (183), 157 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 183 transitions. [2022-07-19 15:21:14,476 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 183 transitions. Word has length 32 [2022-07-19 15:21:14,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:14,476 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 183 transitions. [2022-07-19 15:21:14,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.606060606060606) internal successors, (53), 33 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 183 transitions. [2022-07-19 15:21:14,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-19 15:21:14,477 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:14,477 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:14,494 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:14,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-07-19 15:21:14,678 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:14,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:14,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1085561488, now seen corresponding path program 29 times [2022-07-19 15:21:14,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:14,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821570226] [2022-07-19 15:21:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:14,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:14,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:21:14,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:14,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821570226] [2022-07-19 15:21:14,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821570226] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:14,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686333066] [2022-07-19 15:21:14,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:21:14,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:14,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:14,869 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:14,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-19 15:21:14,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 15:21:14,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:14,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-19 15:21:14,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:21:15,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:15,328 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:21:15,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686333066] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:15,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:15,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 31 [2022-07-19 15:21:15,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572010211] [2022-07-19 15:21:15,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:15,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-07-19 15:21:15,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:15,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-07-19 15:21:15,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2022-07-19 15:21:15,330 INFO L87 Difference]: Start difference. First operand 158 states and 183 transitions. Second operand has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:15,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:15,784 INFO L93 Difference]: Finished difference Result 198 states and 225 transitions. [2022-07-19 15:21:15,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 15:21:15,784 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-19 15:21:15,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:15,785 INFO L225 Difference]: With dead ends: 198 [2022-07-19 15:21:15,785 INFO L226 Difference]: Without dead ends: 192 [2022-07-19 15:21:15,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2022-07-19 15:21:15,786 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 96 mSDsluCounter, 453 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:15,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 476 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:21:15,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-07-19 15:21:15,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 169. [2022-07-19 15:21:15,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.1666666666666667) internal successors, (196), 168 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:15,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 196 transitions. [2022-07-19 15:21:15,846 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 196 transitions. Word has length 32 [2022-07-19 15:21:15,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:15,846 INFO L495 AbstractCegarLoop]: Abstraction has 169 states and 196 transitions. [2022-07-19 15:21:15,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.6451612903225807) internal successors, (51), 31 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:15,846 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 196 transitions. [2022-07-19 15:21:15,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 15:21:15,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:15,847 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:15,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-19 15:21:16,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-19 15:21:16,047 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:16,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:16,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1204403466, now seen corresponding path program 30 times [2022-07-19 15:21:16,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:16,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349372190] [2022-07-19 15:21:16,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:16,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:16,184 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:16,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:16,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349372190] [2022-07-19 15:21:16,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349372190] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:16,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320695644] [2022-07-19 15:21:16,184 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:21:16,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:16,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:16,185 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:16,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-19 15:21:16,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 15:21:16,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:16,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 15:21:16,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:16,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:16,733 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320695644] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:16,733 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:16,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-07-19 15:21:16,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877287714] [2022-07-19 15:21:16,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:16,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 15:21:16,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:16,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 15:21:16,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 15:21:16,735 INFO L87 Difference]: Start difference. First operand 169 states and 196 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:18,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:18,091 INFO L93 Difference]: Finished difference Result 299 states and 335 transitions. [2022-07-19 15:21:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-19 15:21:18,091 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-19 15:21:18,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:18,092 INFO L225 Difference]: With dead ends: 299 [2022-07-19 15:21:18,092 INFO L226 Difference]: Without dead ends: 267 [2022-07-19 15:21:18,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=964, Invalid=3592, Unknown=0, NotChecked=0, Total=4556 [2022-07-19 15:21:18,094 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 786 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:18,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [786 Valid, 865 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:21:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2022-07-19 15:21:18,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 185. [2022-07-19 15:21:18,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.1684782608695652) internal successors, (215), 184 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:18,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 215 transitions. [2022-07-19 15:21:18,174 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 215 transitions. Word has length 33 [2022-07-19 15:21:18,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:18,174 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 215 transitions. [2022-07-19 15:21:18,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:18,174 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 215 transitions. [2022-07-19 15:21:18,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 15:21:18,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:18,175 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:18,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:18,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-07-19 15:21:18,380 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:18,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:18,380 INFO L85 PathProgramCache]: Analyzing trace with hash -2059494761, now seen corresponding path program 31 times [2022-07-19 15:21:18,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:18,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492195469] [2022-07-19 15:21:18,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:18,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:18,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:18,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492195469] [2022-07-19 15:21:18,521 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492195469] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:18,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807846373] [2022-07-19 15:21:18,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:21:18,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:18,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:18,522 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:18,523 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-19 15:21:18,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:18,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 15:21:18,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:18,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:19,135 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:19,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807846373] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:19,135 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:19,135 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 34 [2022-07-19 15:21:19,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715510607] [2022-07-19 15:21:19,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:19,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 15:21:19,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:19,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 15:21:19,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1030, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 15:21:19,137 INFO L87 Difference]: Start difference. First operand 185 states and 215 transitions. Second operand has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:20,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:20,025 INFO L93 Difference]: Finished difference Result 286 states and 319 transitions. [2022-07-19 15:21:20,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-19 15:21:20,026 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-19 15:21:20,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:20,027 INFO L225 Difference]: With dead ends: 286 [2022-07-19 15:21:20,027 INFO L226 Difference]: Without dead ends: 270 [2022-07-19 15:21:20,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=261, Invalid=2091, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 15:21:20,028 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 734 mSDsluCounter, 1662 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 1762 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:20,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [734 Valid, 1762 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:21:20,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-07-19 15:21:20,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 188. [2022-07-19 15:21:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.1657754010695187) internal successors, (218), 187 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 218 transitions. [2022-07-19 15:21:20,100 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 218 transitions. Word has length 33 [2022-07-19 15:21:20,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:20,100 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 218 transitions. [2022-07-19 15:21:20,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8823529411764706) internal successors, (64), 34 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:20,100 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 218 transitions. [2022-07-19 15:21:20,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 15:21:20,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:20,101 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:20,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:20,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:20,315 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:20,315 INFO L85 PathProgramCache]: Analyzing trace with hash 893931157, now seen corresponding path program 32 times [2022-07-19 15:21:20,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:20,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653712048] [2022-07-19 15:21:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:20,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:20,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 15:21:20,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:20,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653712048] [2022-07-19 15:21:20,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653712048] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:20,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3037558] [2022-07-19 15:21:20,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:21:20,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:20,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:20,380 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:20,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-19 15:21:20,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:21:20,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:20,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:21:20,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:20,497 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 15:21:20,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:20,522 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 15:21:20,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3037558] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:20,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:20,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-19 15:21:20,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852780604] [2022-07-19 15:21:20,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:20,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 15:21:20,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:20,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 15:21:20,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-19 15:21:20,524 INFO L87 Difference]: Start difference. First operand 188 states and 218 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:20,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:20,722 INFO L93 Difference]: Finished difference Result 247 states and 283 transitions. [2022-07-19 15:21:20,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 15:21:20,723 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-19 15:21:20,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:20,724 INFO L225 Difference]: With dead ends: 247 [2022-07-19 15:21:20,724 INFO L226 Difference]: Without dead ends: 233 [2022-07-19 15:21:20,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-07-19 15:21:20,725 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 68 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:20,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 231 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:21:20,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-07-19 15:21:20,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 210. [2022-07-19 15:21:20,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.1818181818181819) internal successors, (247), 209 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:20,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 247 transitions. [2022-07-19 15:21:20,805 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 247 transitions. Word has length 33 [2022-07-19 15:21:20,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:20,806 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 247 transitions. [2022-07-19 15:21:20,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:20,806 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 247 transitions. [2022-07-19 15:21:20,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-19 15:21:20,806 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:20,807 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:20,825 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2022-07-19 15:21:21,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-19 15:21:21,015 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:21,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:21,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1979153752, now seen corresponding path program 33 times [2022-07-19 15:21:21,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:21,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192579783] [2022-07-19 15:21:21,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:21,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 15:21:21,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192579783] [2022-07-19 15:21:21,069 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192579783] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:21,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706751266] [2022-07-19 15:21:21,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:21:21,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:21,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:21,071 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:21,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-19 15:21:21,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 15:21:21,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:21,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2022-07-19 15:21:21,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 15:21:21,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:21,200 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-07-19 15:21:21,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706751266] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:21,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:21,201 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-19 15:21:21,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742860459] [2022-07-19 15:21:21,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:21,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-19 15:21:21,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:21,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-19 15:21:21,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2022-07-19 15:21:21,202 INFO L87 Difference]: Start difference. First operand 210 states and 247 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:21,396 INFO L93 Difference]: Finished difference Result 443 states and 524 transitions. [2022-07-19 15:21:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-19 15:21:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-19 15:21:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:21,397 INFO L225 Difference]: With dead ends: 443 [2022-07-19 15:21:21,397 INFO L226 Difference]: Without dead ends: 353 [2022-07-19 15:21:21,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2022-07-19 15:21:21,398 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 205 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:21,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 274 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:21:21,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-07-19 15:21:21,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 248. [2022-07-19 15:21:21,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:21,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2022-07-19 15:21:21,481 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 33 [2022-07-19 15:21:21,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:21,482 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2022-07-19 15:21:21,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:21,482 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2022-07-19 15:21:21,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 15:21:21,482 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:21,482 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:21,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-19 15:21:21,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:21,684 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:21,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:21,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1242809295, now seen corresponding path program 34 times [2022-07-19 15:21:21,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:21,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215895398] [2022-07-19 15:21:21,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:21,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:21,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:22,010 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:22,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:22,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215895398] [2022-07-19 15:21:22,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215895398] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:22,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704316000] [2022-07-19 15:21:22,010 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:21:22,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:22,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:22,016 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:22,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-19 15:21:22,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:21:22,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:22,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-19 15:21:22,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:22,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:22,562 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:22,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704316000] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:22,563 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:22,563 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 38 [2022-07-19 15:21:22,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783577429] [2022-07-19 15:21:22,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:22,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-19 15:21:22,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:22,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-19 15:21:22,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1314, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 15:21:22,564 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:23,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:23,571 INFO L93 Difference]: Finished difference Result 464 states and 518 transitions. [2022-07-19 15:21:23,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 15:21:23,572 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 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 34 [2022-07-19 15:21:23,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:23,573 INFO L225 Difference]: With dead ends: 464 [2022-07-19 15:21:23,573 INFO L226 Difference]: Without dead ends: 455 [2022-07-19 15:21:23,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=283, Invalid=3377, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 15:21:23,575 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 212 mSDsluCounter, 2228 mSDsCounter, 0 mSdLazyCounter, 1096 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 2328 SdHoareTripleChecker+Invalid, 1132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:23,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 2328 Invalid, 1132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1096 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:21:23,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-07-19 15:21:23,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 257. [2022-07-19 15:21:23,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.1796875) internal successors, (302), 256 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:23,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 302 transitions. [2022-07-19 15:21:23,684 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 302 transitions. Word has length 34 [2022-07-19 15:21:23,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:23,684 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 302 transitions. [2022-07-19 15:21:23,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5) internal successors, (57), 38 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:23,684 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 302 transitions. [2022-07-19 15:21:23,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 15:21:23,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:23,685 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:23,703 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2022-07-19 15:21:23,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:23,891 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash 489303023, now seen corresponding path program 35 times [2022-07-19 15:21:23,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:23,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746906981] [2022-07-19 15:21:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:23,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:24,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:24,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:24,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746906981] [2022-07-19 15:21:24,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746906981] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:24,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847583424] [2022-07-19 15:21:24,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:21:24,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:24,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:24,200 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:24,226 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-19 15:21:24,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 15:21:24,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:24,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 15:21:24,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:24,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:24,736 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:24,736 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847583424] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:24,736 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:24,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 36 [2022-07-19 15:21:24,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712207258] [2022-07-19 15:21:24,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:24,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-19 15:21:24,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:24,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-19 15:21:24,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 15:21:24,737 INFO L87 Difference]: Start difference. First operand 257 states and 302 transitions. Second operand has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:25,527 INFO L93 Difference]: Finished difference Result 364 states and 408 transitions. [2022-07-19 15:21:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 15:21:25,527 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 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 34 [2022-07-19 15:21:25,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:25,528 INFO L225 Difference]: With dead ends: 364 [2022-07-19 15:21:25,528 INFO L226 Difference]: Without dead ends: 340 [2022-07-19 15:21:25,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=259, Invalid=2821, Unknown=0, NotChecked=0, Total=3080 [2022-07-19 15:21:25,529 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 139 mSDsluCounter, 1338 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1406 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:25,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1406 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:21:25,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-07-19 15:21:25,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 248. [2022-07-19 15:21:25,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.1821862348178138) internal successors, (292), 247 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:25,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 292 transitions. [2022-07-19 15:21:25,620 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 292 transitions. Word has length 34 [2022-07-19 15:21:25,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:25,620 INFO L495 AbstractCegarLoop]: Abstraction has 248 states and 292 transitions. [2022-07-19 15:21:25,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5555555555555556) internal successors, (56), 36 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:25,620 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 292 transitions. [2022-07-19 15:21:25,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 15:21:25,621 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:25,621 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:25,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2022-07-19 15:21:25,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-19 15:21:25,823 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:25,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:25,824 INFO L85 PathProgramCache]: Analyzing trace with hash -2122819938, now seen corresponding path program 36 times [2022-07-19 15:21:25,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:25,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209718007] [2022-07-19 15:21:25,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:25,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 15:21:25,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:25,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209718007] [2022-07-19 15:21:25,913 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209718007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:25,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984149649] [2022-07-19 15:21:25,913 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:21:25,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:25,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:25,915 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:25,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-19 15:21:25,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-19 15:21:25,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:25,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 15:21:25,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 15:21:26,116 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:26,245 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 15:21:26,245 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984149649] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:26,245 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:26,245 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-07-19 15:21:26,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849137570] [2022-07-19 15:21:26,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:26,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 15:21:26,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:26,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 15:21:26,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-07-19 15:21:26,247 INFO L87 Difference]: Start difference. First operand 248 states and 292 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:26,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:26,944 INFO L93 Difference]: Finished difference Result 359 states and 413 transitions. [2022-07-19 15:21:26,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-19 15:21:26,944 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-19 15:21:26,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:26,945 INFO L225 Difference]: With dead ends: 359 [2022-07-19 15:21:26,945 INFO L226 Difference]: Without dead ends: 314 [2022-07-19 15:21:26,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=1401, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 15:21:26,945 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 422 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 422 SdHoareTripleChecker+Valid, 471 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:26,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [422 Valid, 471 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:21:26,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-19 15:21:27,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 273. [2022-07-19 15:21:27,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.161764705882353) internal successors, (316), 272 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:27,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 316 transitions. [2022-07-19 15:21:27,043 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 316 transitions. Word has length 34 [2022-07-19 15:21:27,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:27,043 INFO L495 AbstractCegarLoop]: Abstraction has 273 states and 316 transitions. [2022-07-19 15:21:27,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:27,043 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 316 transitions. [2022-07-19 15:21:27,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 15:21:27,044 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:27,044 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:27,061 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:27,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-19 15:21:27,244 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:27,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:27,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1302431921, now seen corresponding path program 37 times [2022-07-19 15:21:27,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:27,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541749803] [2022-07-19 15:21:27,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:27,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:27,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:21:27,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:27,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541749803] [2022-07-19 15:21:27,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541749803] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:27,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202813320] [2022-07-19 15:21:27,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:21:27,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:27,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:27,499 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:27,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-19 15:21:27,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:27,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 15:21:27,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:21:27,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:28,012 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:21:28,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [202813320] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:28,012 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:28,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 34 [2022-07-19 15:21:28,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699965664] [2022-07-19 15:21:28,012 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:28,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-19 15:21:28,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:28,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-19 15:21:28,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2022-07-19 15:21:28,013 INFO L87 Difference]: Start difference. First operand 273 states and 316 transitions. Second operand has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:28,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:28,678 INFO L93 Difference]: Finished difference Result 352 states and 398 transitions. [2022-07-19 15:21:28,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 15:21:28,679 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2022-07-19 15:21:28,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:28,680 INFO L225 Difference]: With dead ends: 352 [2022-07-19 15:21:28,680 INFO L226 Difference]: Without dead ends: 327 [2022-07-19 15:21:28,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 47 SyntacticMatches, 7 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=253, Invalid=2399, Unknown=0, NotChecked=0, Total=2652 [2022-07-19 15:21:28,681 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 111 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 592 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:28,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 874 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 592 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:21:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2022-07-19 15:21:28,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 271. [2022-07-19 15:21:28,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1666666666666667) internal successors, (315), 270 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:28,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 315 transitions. [2022-07-19 15:21:28,784 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 315 transitions. Word has length 34 [2022-07-19 15:21:28,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:28,784 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 315 transitions. [2022-07-19 15:21:28,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.588235294117647) internal successors, (54), 34 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:28,785 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 315 transitions. [2022-07-19 15:21:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 15:21:28,785 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:28,786 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:28,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:29,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-19 15:21:29,002 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:29,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:29,003 INFO L85 PathProgramCache]: Analyzing trace with hash -266355998, now seen corresponding path program 38 times [2022-07-19 15:21:29,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:29,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978939923] [2022-07-19 15:21:29,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:29,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:29,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:29,108 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 15:21:29,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:29,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978939923] [2022-07-19 15:21:29,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978939923] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:29,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183663821] [2022-07-19 15:21:29,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:21:29,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:29,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:29,110 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:29,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-19 15:21:29,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:21:29,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:29,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-19 15:21:29,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 15:21:29,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-19 15:21:29,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183663821] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:29,429 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:29,429 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2022-07-19 15:21:29,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038511103] [2022-07-19 15:21:29,430 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:29,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 15:21:29,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:29,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 15:21:29,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2022-07-19 15:21:29,430 INFO L87 Difference]: Start difference. First operand 271 states and 315 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:29,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:29,903 INFO L93 Difference]: Finished difference Result 318 states and 359 transitions. [2022-07-19 15:21:29,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-07-19 15:21:29,903 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 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 34 [2022-07-19 15:21:29,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:29,904 INFO L225 Difference]: With dead ends: 318 [2022-07-19 15:21:29,904 INFO L226 Difference]: Without dead ends: 294 [2022-07-19 15:21:29,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 15:21:29,905 INFO L413 NwaCegarLoop]: 71 mSDtfsCounter, 359 mSDsluCounter, 825 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 896 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:29,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [359 Valid, 896 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 335 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:21:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-07-19 15:21:30,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 271. [2022-07-19 15:21:30,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1444444444444444) internal successors, (309), 270 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:30,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 309 transitions. [2022-07-19 15:21:30,007 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 309 transitions. Word has length 34 [2022-07-19 15:21:30,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:30,007 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 309 transitions. [2022-07-19 15:21:30,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:30,008 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 309 transitions. [2022-07-19 15:21:30,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 15:21:30,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:30,009 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:30,027 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:30,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-07-19 15:21:30,216 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:30,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:30,216 INFO L85 PathProgramCache]: Analyzing trace with hash 535019927, now seen corresponding path program 39 times [2022-07-19 15:21:30,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:30,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377433352] [2022-07-19 15:21:30,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:30,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:30,364 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:30,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:30,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377433352] [2022-07-19 15:21:30,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377433352] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:30,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086605404] [2022-07-19 15:21:30,365 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:21:30,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:30,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:30,366 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:30,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-19 15:21:30,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 15:21:30,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:30,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 15:21:30,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:30,756 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:30,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:31,010 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086605404] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:31,010 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:31,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-07-19 15:21:31,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57713420] [2022-07-19 15:21:31,011 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:31,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 15:21:31,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:31,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 15:21:31,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 15:21:31,011 INFO L87 Difference]: Start difference. First operand 271 states and 309 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:32,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:32,923 INFO L93 Difference]: Finished difference Result 470 states and 520 transitions. [2022-07-19 15:21:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-19 15:21:32,924 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-19 15:21:32,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:32,925 INFO L225 Difference]: With dead ends: 470 [2022-07-19 15:21:32,925 INFO L226 Difference]: Without dead ends: 434 [2022-07-19 15:21:32,925 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1420, Invalid=5386, Unknown=0, NotChecked=0, Total=6806 [2022-07-19 15:21:32,926 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 1168 mSDsluCounter, 1025 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1168 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 622 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:32,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1168 Valid, 1093 Invalid, 622 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:21:32,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-07-19 15:21:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 301. [2022-07-19 15:21:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1433333333333333) internal successors, (343), 300 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:33,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 343 transitions. [2022-07-19 15:21:33,055 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 343 transitions. Word has length 35 [2022-07-19 15:21:33,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:33,055 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 343 transitions. [2022-07-19 15:21:33,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 343 transitions. [2022-07-19 15:21:33,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 15:21:33,056 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:33,056 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:33,074 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:33,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:33,263 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:33,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:33,264 INFO L85 PathProgramCache]: Analyzing trace with hash -203006442, now seen corresponding path program 40 times [2022-07-19 15:21:33,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:33,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387225253] [2022-07-19 15:21:33,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:33,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:33,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:33,450 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:33,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:33,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387225253] [2022-07-19 15:21:33,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387225253] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:33,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217624343] [2022-07-19 15:21:33,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:21:33,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:33,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:33,456 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:33,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-19 15:21:33,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:21:33,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:33,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 15:21:33,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:33,867 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:33,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:34,123 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:34,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217624343] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:34,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:34,123 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 39 [2022-07-19 15:21:34,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874361752] [2022-07-19 15:21:34,124 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:34,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 15:21:34,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:34,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 15:21:34,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 15:21:34,124 INFO L87 Difference]: Start difference. First operand 301 states and 343 transitions. Second operand has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:35,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:35,229 INFO L93 Difference]: Finished difference Result 456 states and 502 transitions. [2022-07-19 15:21:35,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 15:21:35,229 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-19 15:21:35,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:35,230 INFO L225 Difference]: With dead ends: 456 [2022-07-19 15:21:35,230 INFO L226 Difference]: Without dead ends: 438 [2022-07-19 15:21:35,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2022-07-19 15:21:35,231 INFO L413 NwaCegarLoop]: 116 mSDtfsCounter, 981 mSDsluCounter, 2431 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 981 SdHoareTripleChecker+Valid, 2547 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:35,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [981 Valid, 2547 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:21:35,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2022-07-19 15:21:35,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 305. [2022-07-19 15:21:35,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.1414473684210527) internal successors, (347), 304 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:35,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 347 transitions. [2022-07-19 15:21:35,373 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 347 transitions. Word has length 35 [2022-07-19 15:21:35,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:35,373 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 347 transitions. [2022-07-19 15:21:35,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7692307692307692) internal successors, (69), 39 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:35,373 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 347 transitions. [2022-07-19 15:21:35,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 15:21:35,374 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:35,374 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:35,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-07-19 15:21:35,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-19 15:21:35,583 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:35,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1280821844, now seen corresponding path program 41 times [2022-07-19 15:21:35,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:35,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714430624] [2022-07-19 15:21:35,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:35,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:35,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:35,641 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 15:21:35,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:35,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714430624] [2022-07-19 15:21:35,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714430624] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:35,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262896047] [2022-07-19 15:21:35,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:21:35,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:35,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:35,643 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:35,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-19 15:21:35,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 15:21:35,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:35,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 15:21:35,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 15:21:35,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:35,753 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 15:21:35,753 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262896047] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:35,753 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:35,753 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-19 15:21:35,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135734771] [2022-07-19 15:21:35,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:35,753 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 15:21:35,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:35,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 15:21:35,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:21:35,754 INFO L87 Difference]: Start difference. First operand 305 states and 347 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:35,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:35,956 INFO L93 Difference]: Finished difference Result 394 states and 444 transitions. [2022-07-19 15:21:35,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 15:21:35,957 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-19 15:21:35,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:35,958 INFO L225 Difference]: With dead ends: 394 [2022-07-19 15:21:35,958 INFO L226 Difference]: Without dead ends: 314 [2022-07-19 15:21:35,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:21:35,958 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 92 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:35,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 236 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:21:35,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-19 15:21:36,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 291. [2022-07-19 15:21:36,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 290 states have (on average 1.1344827586206896) internal successors, (329), 290 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:36,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 329 transitions. [2022-07-19 15:21:36,073 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 329 transitions. Word has length 35 [2022-07-19 15:21:36,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:36,073 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 329 transitions. [2022-07-19 15:21:36,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:36,073 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 329 transitions. [2022-07-19 15:21:36,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-19 15:21:36,074 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:36,074 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:36,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:36,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:36,298 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:36,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:36,298 INFO L85 PathProgramCache]: Analyzing trace with hash 365909845, now seen corresponding path program 42 times [2022-07-19 15:21:36,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:36,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724195890] [2022-07-19 15:21:36,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:36,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:36,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:36,356 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 15:21:36,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:36,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724195890] [2022-07-19 15:21:36,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724195890] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:36,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500339991] [2022-07-19 15:21:36,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:21:36,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:36,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:36,358 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:36,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-19 15:21:36,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-07-19 15:21:36,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:36,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-19 15:21:36,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:36,463 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 15:21:36,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:36,487 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 15:21:36,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500339991] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:36,487 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:36,487 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-19 15:21:36,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264103050] [2022-07-19 15:21:36,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:36,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-19 15:21:36,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:36,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-19 15:21:36,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2022-07-19 15:21:36,488 INFO L87 Difference]: Start difference. First operand 291 states and 329 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:36,693 INFO L93 Difference]: Finished difference Result 321 states and 356 transitions. [2022-07-19 15:21:36,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 15:21:36,693 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2022-07-19 15:21:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:36,694 INFO L225 Difference]: With dead ends: 321 [2022-07-19 15:21:36,694 INFO L226 Difference]: Without dead ends: 315 [2022-07-19 15:21:36,694 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:21:36,695 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 53 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:36,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 292 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:21:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-07-19 15:21:36,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 292. [2022-07-19 15:21:36,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:36,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2022-07-19 15:21:36,813 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 35 [2022-07-19 15:21:36,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:36,813 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2022-07-19 15:21:36,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:36,813 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2022-07-19 15:21:36,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 15:21:36,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:36,814 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:36,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2022-07-19 15:21:37,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-19 15:21:37,014 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:37,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:37,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1335594960, now seen corresponding path program 43 times [2022-07-19 15:21:37,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:37,015 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112306847] [2022-07-19 15:21:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:37,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:37,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:37,317 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:37,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:37,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112306847] [2022-07-19 15:21:37,318 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112306847] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:37,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965180741] [2022-07-19 15:21:37,318 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:21:37,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:37,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:37,319 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:37,320 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-19 15:21:37,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:37,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 15:21:37,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:37,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:37,876 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:37,876 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965180741] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:37,876 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:37,876 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 41 [2022-07-19 15:21:37,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174874045] [2022-07-19 15:21:37,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:37,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 15:21:37,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:37,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 15:21:37,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1541, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 15:21:37,877 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:39,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:39,131 INFO L93 Difference]: Finished difference Result 540 states and 587 transitions. [2022-07-19 15:21:39,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 15:21:39,132 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-19 15:21:39,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:39,133 INFO L225 Difference]: With dead ends: 540 [2022-07-19 15:21:39,133 INFO L226 Difference]: Without dead ends: 531 [2022-07-19 15:21:39,133 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=302, Invalid=3988, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 15:21:39,133 INFO L413 NwaCegarLoop]: 117 mSDtfsCounter, 238 mSDsluCounter, 3154 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 3271 SdHoareTripleChecker+Invalid, 1604 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:39,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 3271 Invalid, 1604 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:21:39,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2022-07-19 15:21:39,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 301. [2022-07-19 15:21:39,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.1333333333333333) internal successors, (340), 300 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:39,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 340 transitions. [2022-07-19 15:21:39,283 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 340 transitions. Word has length 36 [2022-07-19 15:21:39,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:39,283 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 340 transitions. [2022-07-19 15:21:39,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4634146341463414) internal successors, (60), 41 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:39,283 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 340 transitions. [2022-07-19 15:21:39,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 15:21:39,284 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:39,284 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:39,311 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:39,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:39,499 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:39,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:39,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1858622864, now seen corresponding path program 44 times [2022-07-19 15:21:39,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:39,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021608881] [2022-07-19 15:21:39,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:39,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:39,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:39,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021608881] [2022-07-19 15:21:39,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021608881] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:39,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517783970] [2022-07-19 15:21:39,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:21:39,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:39,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:39,833 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:39,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-19 15:21:39,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:21:39,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:39,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-19 15:21:39,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:40,237 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:40,415 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:40,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517783970] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:40,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:40,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 39 [2022-07-19 15:21:40,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94875865] [2022-07-19 15:21:40,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:40,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 15:21:40,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:40,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 15:21:40,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1384, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 15:21:40,416 INFO L87 Difference]: Start difference. First operand 301 states and 340 transitions. Second operand has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:41,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:41,363 INFO L93 Difference]: Finished difference Result 427 states and 465 transitions. [2022-07-19 15:21:41,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 15:21:41,364 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-19 15:21:41,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:41,365 INFO L225 Difference]: With dead ends: 427 [2022-07-19 15:21:41,365 INFO L226 Difference]: Without dead ends: 402 [2022-07-19 15:21:41,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2022-07-19 15:21:41,365 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 161 mSDsluCounter, 1988 mSDsCounter, 0 mSdLazyCounter, 1001 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 2077 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:41,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 2077 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1001 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:21:41,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-07-19 15:21:41,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 292. [2022-07-19 15:21:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 1.134020618556701) internal successors, (330), 291 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:41,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 330 transitions. [2022-07-19 15:21:41,501 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 330 transitions. Word has length 36 [2022-07-19 15:21:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:41,501 INFO L495 AbstractCegarLoop]: Abstraction has 292 states and 330 transitions. [2022-07-19 15:21:41,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 330 transitions. [2022-07-19 15:21:41,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 15:21:41,502 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:41,502 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:41,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:41,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:41,725 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:41,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:41,725 INFO L85 PathProgramCache]: Analyzing trace with hash -1659359184, now seen corresponding path program 45 times [2022-07-19 15:21:41,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:41,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836433866] [2022-07-19 15:21:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:41,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:41,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:41,975 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:21:41,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:41,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836433866] [2022-07-19 15:21:41,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836433866] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:41,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783064369] [2022-07-19 15:21:41,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:21:41,975 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:41,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:41,976 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:41,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-19 15:21:42,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-19 15:21:42,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:42,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 15:21:42,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:21:42,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:42,526 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:21:42,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783064369] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:42,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:42,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 37 [2022-07-19 15:21:42,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346854004] [2022-07-19 15:21:42,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:42,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-19 15:21:42,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:42,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-19 15:21:42,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2022-07-19 15:21:42,527 INFO L87 Difference]: Start difference. First operand 292 states and 330 transitions. Second operand has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:43,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:43,306 INFO L93 Difference]: Finished difference Result 352 states and 389 transitions. [2022-07-19 15:21:43,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 15:21:43,306 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-19 15:21:43,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:43,307 INFO L225 Difference]: With dead ends: 352 [2022-07-19 15:21:43,307 INFO L226 Difference]: Without dead ends: 326 [2022-07-19 15:21:43,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=271, Invalid=2921, Unknown=0, NotChecked=0, Total=3192 [2022-07-19 15:21:43,308 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 114 mSDsluCounter, 1234 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 1289 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:43,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 1289 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:21:43,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2022-07-19 15:21:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 281. [2022-07-19 15:21:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.1357142857142857) internal successors, (318), 280 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:43,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 318 transitions. [2022-07-19 15:21:43,417 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 318 transitions. Word has length 36 [2022-07-19 15:21:43,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:43,417 INFO L495 AbstractCegarLoop]: Abstraction has 281 states and 318 transitions. [2022-07-19 15:21:43,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5405405405405406) internal successors, (57), 37 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:43,417 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 318 transitions. [2022-07-19 15:21:43,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-19 15:21:43,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:43,418 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:43,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-19 15:21:43,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-19 15:21:43,618 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:43,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:43,619 INFO L85 PathProgramCache]: Analyzing trace with hash 59566704, now seen corresponding path program 46 times [2022-07-19 15:21:43,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:43,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123395789] [2022-07-19 15:21:43,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:43,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:43,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:43,863 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:21:43,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:43,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123395789] [2022-07-19 15:21:43,863 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123395789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:43,863 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514122706] [2022-07-19 15:21:43,864 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:21:43,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:43,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:43,868 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:43,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-19 15:21:43,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:21:43,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:43,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-19 15:21:43,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:21:44,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:44,431 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:21:44,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514122706] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:44,431 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:44,431 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 35 [2022-07-19 15:21:44,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507233696] [2022-07-19 15:21:44,431 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:44,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 15:21:44,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:44,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 15:21:44,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1094, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 15:21:44,432 INFO L87 Difference]: Start difference. First operand 281 states and 318 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:45,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:45,046 INFO L93 Difference]: Finished difference Result 324 states and 363 transitions. [2022-07-19 15:21:45,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 15:21:45,047 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2022-07-19 15:21:45,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:45,047 INFO L225 Difference]: With dead ends: 324 [2022-07-19 15:21:45,047 INFO L226 Difference]: Without dead ends: 318 [2022-07-19 15:21:45,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 50 SyntacticMatches, 7 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=265, Invalid=2491, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 15:21:45,048 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 110 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:45,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 503 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:21:45,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-07-19 15:21:45,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 293. [2022-07-19 15:21:45,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.1369863013698631) internal successors, (332), 292 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:45,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 332 transitions. [2022-07-19 15:21:45,181 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 332 transitions. Word has length 36 [2022-07-19 15:21:45,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:45,181 INFO L495 AbstractCegarLoop]: Abstraction has 293 states and 332 transitions. [2022-07-19 15:21:45,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 35 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:45,182 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 332 transitions. [2022-07-19 15:21:45,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 15:21:45,183 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:45,183 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:45,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:45,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2022-07-19 15:21:45,391 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:45,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:45,392 INFO L85 PathProgramCache]: Analyzing trace with hash -2086100650, now seen corresponding path program 47 times [2022-07-19 15:21:45,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:45,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33752739] [2022-07-19 15:21:45,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:45,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:45,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:45,592 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:45,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:45,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33752739] [2022-07-19 15:21:45,592 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33752739] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:45,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9533344] [2022-07-19 15:21:45,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:21:45,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:45,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:45,594 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:45,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-19 15:21:45,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 15:21:45,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:45,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 15:21:45,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:46,055 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:46,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:46,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9533344] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:46,355 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:46,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2022-07-19 15:21:46,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087288890] [2022-07-19 15:21:46,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:46,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 15:21:46,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:46,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 15:21:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 15:21:46,356 INFO L87 Difference]: Start difference. First operand 293 states and 332 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:49,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:49,055 INFO L93 Difference]: Finished difference Result 520 states and 571 transitions. [2022-07-19 15:21:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-19 15:21:49,056 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-19 15:21:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:49,057 INFO L225 Difference]: With dead ends: 520 [2022-07-19 15:21:49,057 INFO L226 Difference]: Without dead ends: 482 [2022-07-19 15:21:49,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2002, Invalid=7700, Unknown=0, NotChecked=0, Total=9702 [2022-07-19 15:21:49,058 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1710 mSDsluCounter, 1276 mSDsCounter, 0 mSdLazyCounter, 720 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1710 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:49,058 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1710 Valid, 1352 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 720 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:21:49,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2022-07-19 15:21:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 324. [2022-07-19 15:21:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 323 states have (on average 1.1362229102167183) internal successors, (367), 323 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:49,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 367 transitions. [2022-07-19 15:21:49,218 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 367 transitions. Word has length 37 [2022-07-19 15:21:49,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:49,218 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 367 transitions. [2022-07-19 15:21:49,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:49,218 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 367 transitions. [2022-07-19 15:21:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 15:21:49,219 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:49,219 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:49,235 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-07-19 15:21:49,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2022-07-19 15:21:49,423 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:49,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:49,423 INFO L85 PathProgramCache]: Analyzing trace with hash 804885687, now seen corresponding path program 48 times [2022-07-19 15:21:49,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:49,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783319445] [2022-07-19 15:21:49,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:49,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:49,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:49,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:49,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783319445] [2022-07-19 15:21:49,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783319445] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:49,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133015325] [2022-07-19 15:21:49,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:21:49,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:49,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:49,650 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:49,659 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-19 15:21:49,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 15:21:49,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:49,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-19 15:21:49,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:50,189 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:21:50,526 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133015325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:50,526 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:50,526 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 44 [2022-07-19 15:21:50,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142138405] [2022-07-19 15:21:50,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:50,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 15:21:50,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:50,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 15:21:50,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 15:21:50,527 INFO L87 Difference]: Start difference. First operand 324 states and 367 transitions. Second operand has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:51,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:51,991 INFO L93 Difference]: Finished difference Result 505 states and 552 transitions. [2022-07-19 15:21:51,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 15:21:51,991 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-19 15:21:51,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:51,993 INFO L225 Difference]: With dead ends: 505 [2022-07-19 15:21:51,993 INFO L226 Difference]: Without dead ends: 486 [2022-07-19 15:21:51,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=399, Invalid=3761, Unknown=0, NotChecked=0, Total=4160 [2022-07-19 15:21:51,993 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 1268 mSDsluCounter, 3376 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 3508 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:51,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1268 Valid, 3508 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:21:51,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-07-19 15:21:52,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 328. [2022-07-19 15:21:52,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.1345565749235473) internal successors, (371), 327 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:52,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 371 transitions. [2022-07-19 15:21:52,154 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 371 transitions. Word has length 37 [2022-07-19 15:21:52,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:52,154 INFO L495 AbstractCegarLoop]: Abstraction has 328 states and 371 transitions. [2022-07-19 15:21:52,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:52,155 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 371 transitions. [2022-07-19 15:21:52,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 15:21:52,155 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:52,156 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:52,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2022-07-19 15:21:52,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2022-07-19 15:21:52,367 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:52,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:52,368 INFO L85 PathProgramCache]: Analyzing trace with hash -847136075, now seen corresponding path program 49 times [2022-07-19 15:21:52,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:52,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356344348] [2022-07-19 15:21:52,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:52,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:52,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 15:21:52,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:52,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356344348] [2022-07-19 15:21:52,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356344348] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:52,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488276949] [2022-07-19 15:21:52,440 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:21:52,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:52,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:52,442 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:52,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-19 15:21:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:52,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 15:21:52,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:52,567 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 15:21:52,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:52,594 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 15:21:52,594 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488276949] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:52,595 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:52,595 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2022-07-19 15:21:52,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696731130] [2022-07-19 15:21:52,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:52,595 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 15:21:52,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:52,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 15:21:52,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-19 15:21:52,596 INFO L87 Difference]: Start difference. First operand 328 states and 371 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:52,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:52,941 INFO L93 Difference]: Finished difference Result 404 states and 454 transitions. [2022-07-19 15:21:52,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 15:21:52,941 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-19 15:21:52,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:52,943 INFO L225 Difference]: With dead ends: 404 [2022-07-19 15:21:52,943 INFO L226 Difference]: Without dead ends: 389 [2022-07-19 15:21:52,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2022-07-19 15:21:52,943 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 112 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:52,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 316 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:21:52,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2022-07-19 15:21:53,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 356. [2022-07-19 15:21:53,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.1492957746478873) internal successors, (408), 355 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:53,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 408 transitions. [2022-07-19 15:21:53,100 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 408 transitions. Word has length 37 [2022-07-19 15:21:53,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:53,100 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 408 transitions. [2022-07-19 15:21:53,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:53,100 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 408 transitions. [2022-07-19 15:21:53,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-07-19 15:21:53,101 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:53,101 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:53,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2022-07-19 15:21:53,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-19 15:21:53,303 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:53,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:53,303 INFO L85 PathProgramCache]: Analyzing trace with hash 855363028, now seen corresponding path program 50 times [2022-07-19 15:21:53,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:53,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978008147] [2022-07-19 15:21:53,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:53,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:53,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 15:21:53,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:53,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978008147] [2022-07-19 15:21:53,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978008147] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:53,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129723741] [2022-07-19 15:21:53,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:21:53,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:53,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:53,364 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:53,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-19 15:21:53,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:21:53,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:53,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-19 15:21:53,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 15:21:53,470 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:53,492 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-19 15:21:53,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129723741] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:53,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:53,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 19 [2022-07-19 15:21:53,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470495758] [2022-07-19 15:21:53,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:53,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-07-19 15:21:53,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:53,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-07-19 15:21:53,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2022-07-19 15:21:53,493 INFO L87 Difference]: Start difference. First operand 356 states and 408 transitions. Second operand has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:53,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:53,921 INFO L93 Difference]: Finished difference Result 685 states and 794 transitions. [2022-07-19 15:21:53,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 15:21:53,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2022-07-19 15:21:53,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:53,923 INFO L225 Difference]: With dead ends: 685 [2022-07-19 15:21:53,923 INFO L226 Difference]: Without dead ends: 561 [2022-07-19 15:21:53,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=551, Unknown=0, NotChecked=0, Total=756 [2022-07-19 15:21:53,923 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 295 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:53,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 397 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:21:53,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 561 states. [2022-07-19 15:21:54,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 561 to 414. [2022-07-19 15:21:54,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:54,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2022-07-19 15:21:54,174 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 37 [2022-07-19 15:21:54,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:54,174 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2022-07-19 15:21:54,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 19 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:54,174 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2022-07-19 15:21:54,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 15:21:54,175 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:54,175 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:54,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2022-07-19 15:21:54,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2022-07-19 15:21:54,391 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:54,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:54,392 INFO L85 PathProgramCache]: Analyzing trace with hash -155710033, now seen corresponding path program 51 times [2022-07-19 15:21:54,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:54,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331542966] [2022-07-19 15:21:54,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:54,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:54,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:54,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331542966] [2022-07-19 15:21:54,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331542966] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:54,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699603169] [2022-07-19 15:21:54,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:21:54,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:54,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:54,758 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:54,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-19 15:21:54,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 15:21:54,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:54,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-19 15:21:54,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:55,179 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:55,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:55,389 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:21:55,389 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699603169] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:55,389 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:55,389 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 44 [2022-07-19 15:21:55,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795253670] [2022-07-19 15:21:55,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:55,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 15:21:55,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:55,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 15:21:55,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1786, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 15:21:55,391 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:56,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:56,993 INFO L93 Difference]: Finished difference Result 761 states and 834 transitions. [2022-07-19 15:21:56,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-19 15:21:56,993 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-19 15:21:56,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:56,995 INFO L225 Difference]: With dead ends: 761 [2022-07-19 15:21:56,995 INFO L226 Difference]: Without dead ends: 752 [2022-07-19 15:21:56,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 55 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=321, Invalid=4649, Unknown=0, NotChecked=0, Total=4970 [2022-07-19 15:21:56,996 INFO L413 NwaCegarLoop]: 134 mSDtfsCounter, 257 mSDsluCounter, 3844 mSDsCounter, 0 mSdLazyCounter, 1791 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 3978 SdHoareTripleChecker+Invalid, 1833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:56,996 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 3978 Invalid, 1833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1791 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 15:21:56,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-07-19 15:21:57,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 423. [2022-07-19 15:21:57,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 422 states have (on average 1.1492890995260663) internal successors, (485), 422 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 485 transitions. [2022-07-19 15:21:57,195 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 485 transitions. Word has length 38 [2022-07-19 15:21:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:57,195 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 485 transitions. [2022-07-19 15:21:57,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4318181818181819) internal successors, (63), 44 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 485 transitions. [2022-07-19 15:21:57,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 15:21:57,195 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:57,196 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:57,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-07-19 15:21:57,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:57,396 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:21:57,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:21:57,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1493827249, now seen corresponding path program 52 times [2022-07-19 15:21:57,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:21:57,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469628938] [2022-07-19 15:21:57,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:21:57,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:21:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:21:57,709 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:57,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:21:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469628938] [2022-07-19 15:21:57,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469628938] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:21:57,710 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362399078] [2022-07-19 15:21:57,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:21:57,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:21:57,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:21:57,712 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:21:57,718 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-19 15:21:57,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:21:57,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:21:57,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 15:21:57,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:21:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:58,134 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:21:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:21:58,330 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362399078] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:21:58,330 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:21:58,330 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 42 [2022-07-19 15:21:58,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26482109] [2022-07-19 15:21:58,330 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:21:58,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 15:21:58,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:21:58,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 15:21:58,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 15:21:58,331 INFO L87 Difference]: Start difference. First operand 423 states and 485 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:59,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:21:59,662 INFO L93 Difference]: Finished difference Result 623 states and 684 transitions. [2022-07-19 15:21:59,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 15:21:59,663 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-19 15:21:59,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:21:59,664 INFO L225 Difference]: With dead ends: 623 [2022-07-19 15:21:59,664 INFO L226 Difference]: Without dead ends: 597 [2022-07-19 15:21:59,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=295, Invalid=3995, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 15:21:59,665 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 174 mSDsluCounter, 2828 mSDsCounter, 0 mSdLazyCounter, 1466 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 2930 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:21:59,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 2930 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1466 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:21:59,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-07-19 15:21:59,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 414. [2022-07-19 15:21:59,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.1501210653753027) internal successors, (475), 413 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:59,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 475 transitions. [2022-07-19 15:21:59,845 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 475 transitions. Word has length 38 [2022-07-19 15:21:59,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:21:59,845 INFO L495 AbstractCegarLoop]: Abstraction has 414 states and 475 transitions. [2022-07-19 15:21:59,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:21:59,846 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 475 transitions. [2022-07-19 15:21:59,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 15:21:59,847 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:21:59,847 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:21:59,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2022-07-19 15:22:00,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:00,047 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:00,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:00,048 INFO L85 PathProgramCache]: Analyzing trace with hash -375561937, now seen corresponding path program 53 times [2022-07-19 15:22:00,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:00,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8769794] [2022-07-19 15:22:00,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:00,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:00,325 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:22:00,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:00,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8769794] [2022-07-19 15:22:00,326 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8769794] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:00,326 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071539604] [2022-07-19 15:22:00,326 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:22:00,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:00,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:00,327 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:00,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-19 15:22:00,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-07-19 15:22:00,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:00,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-19 15:22:00,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:00,730 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:22:00,731 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:00,912 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:22:00,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071539604] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:00,912 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:00,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 40 [2022-07-19 15:22:00,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755567614] [2022-07-19 15:22:00,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:00,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-19 15:22:00,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:00,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-19 15:22:00,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 15:22:00,913 INFO L87 Difference]: Start difference. First operand 414 states and 475 transitions. Second operand has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:01,953 INFO L93 Difference]: Finished difference Result 530 states and 590 transitions. [2022-07-19 15:22:01,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 15:22:01,953 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-19 15:22:01,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:01,954 INFO L225 Difference]: With dead ends: 530 [2022-07-19 15:22:01,954 INFO L226 Difference]: Without dead ends: 503 [2022-07-19 15:22:01,955 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 687 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=289, Invalid=3493, Unknown=0, NotChecked=0, Total=3782 [2022-07-19 15:22:01,955 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 140 mSDsluCounter, 1518 mSDsCounter, 0 mSdLazyCounter, 889 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 1586 SdHoareTripleChecker+Invalid, 931 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 889 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:01,955 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 1586 Invalid, 931 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 889 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:22:01,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-07-19 15:22:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 403. [2022-07-19 15:22:02,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 1.1517412935323383) internal successors, (463), 402 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:02,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 463 transitions. [2022-07-19 15:22:02,144 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 463 transitions. Word has length 38 [2022-07-19 15:22:02,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:02,144 INFO L495 AbstractCegarLoop]: Abstraction has 403 states and 463 transitions. [2022-07-19 15:22:02,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:02,144 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 463 transitions. [2022-07-19 15:22:02,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 15:22:02,145 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:02,145 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:02,164 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2022-07-19 15:22:02,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:02,355 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:02,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:02,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1552999778, now seen corresponding path program 54 times [2022-07-19 15:22:02,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:02,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767938643] [2022-07-19 15:22:02,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:02,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:02,486 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 15:22:02,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:02,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767938643] [2022-07-19 15:22:02,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767938643] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:02,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359170511] [2022-07-19 15:22:02,487 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:22:02,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:02,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:02,488 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:02,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-19 15:22:02,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 15:22:02,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:02,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 15:22:02,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:02,733 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 15:22:02,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 15:22:02,886 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359170511] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:02,886 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:02,886 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-07-19 15:22:02,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445305411] [2022-07-19 15:22:02,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:02,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 15:22:02,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:02,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 15:22:02,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-07-19 15:22:02,887 INFO L87 Difference]: Start difference. First operand 403 states and 463 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:04,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:04,032 INFO L93 Difference]: Finished difference Result 556 states and 629 transitions. [2022-07-19 15:22:04,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 15:22:04,032 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 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 38 [2022-07-19 15:22:04,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:04,033 INFO L225 Difference]: With dead ends: 556 [2022-07-19 15:22:04,033 INFO L226 Difference]: Without dead ends: 502 [2022-07-19 15:22:04,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=675, Invalid=2405, Unknown=0, NotChecked=0, Total=3080 [2022-07-19 15:22:04,034 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 760 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:04,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [760 Valid, 657 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:22:04,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2022-07-19 15:22:04,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 446. [2022-07-19 15:22:04,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 445 states have (on average 1.1348314606741574) internal successors, (505), 445 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:04,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 505 transitions. [2022-07-19 15:22:04,249 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 505 transitions. Word has length 38 [2022-07-19 15:22:04,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:04,249 INFO L495 AbstractCegarLoop]: Abstraction has 446 states and 505 transitions. [2022-07-19 15:22:04,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 30 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:04,250 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 505 transitions. [2022-07-19 15:22:04,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 15:22:04,250 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:04,250 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:04,267 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-07-19 15:22:04,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:04,451 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:04,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:04,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1465831985, now seen corresponding path program 55 times [2022-07-19 15:22:04,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:04,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474036310] [2022-07-19 15:22:04,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:04,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:04,734 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:22:04,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:04,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474036310] [2022-07-19 15:22:04,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474036310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:04,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773672095] [2022-07-19 15:22:04,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:22:04,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:04,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:04,736 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:04,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-19 15:22:04,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:04,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 15:22:04,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:22:05,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:05,322 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:22:05,322 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773672095] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:05,322 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:05,322 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 38 [2022-07-19 15:22:05,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083203619] [2022-07-19 15:22:05,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:05,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-19 15:22:05,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:05,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-19 15:22:05,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 15:22:05,323 INFO L87 Difference]: Start difference. First operand 446 states and 505 transitions. Second operand has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:06,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:06,245 INFO L93 Difference]: Finished difference Result 532 states and 594 transitions. [2022-07-19 15:22:06,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-19 15:22:06,246 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-19 15:22:06,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:06,247 INFO L225 Difference]: With dead ends: 532 [2022-07-19 15:22:06,247 INFO L226 Difference]: Without dead ends: 504 [2022-07-19 15:22:06,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=283, Invalid=3023, Unknown=0, NotChecked=0, Total=3306 [2022-07-19 15:22:06,248 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 109 mSDsluCounter, 869 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 909 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:06,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 909 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:22:06,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-07-19 15:22:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 443. [2022-07-19 15:22:06,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1380090497737556) internal successors, (503), 442 states have internal predecessors, (503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 503 transitions. [2022-07-19 15:22:06,462 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 503 transitions. Word has length 38 [2022-07-19 15:22:06,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:06,462 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 503 transitions. [2022-07-19 15:22:06,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 38 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:06,463 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 503 transitions. [2022-07-19 15:22:06,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-19 15:22:06,463 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:06,463 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:06,480 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2022-07-19 15:22:06,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2022-07-19 15:22:06,664 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:06,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:06,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1135200674, now seen corresponding path program 56 times [2022-07-19 15:22:06,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:06,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733767570] [2022-07-19 15:22:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:06,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-19 15:22:06,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733767570] [2022-07-19 15:22:06,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733767570] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:06,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394895318] [2022-07-19 15:22:06,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:22:06,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:06,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:06,787 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:06,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2022-07-19 15:22:06,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:22:06,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:06,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-19 15:22:06,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 15:22:07,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-07-19 15:22:07,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394895318] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:07,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:07,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2022-07-19 15:22:07,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325488282] [2022-07-19 15:22:07,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:07,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-07-19 15:22:07,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:07,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-07-19 15:22:07,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2022-07-19 15:22:07,206 INFO L87 Difference]: Start difference. First operand 443 states and 503 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:08,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:08,003 INFO L93 Difference]: Finished difference Result 505 states and 561 transitions. [2022-07-19 15:22:08,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-07-19 15:22:08,004 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-19 15:22:08,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:08,005 INFO L225 Difference]: With dead ends: 505 [2022-07-19 15:22:08,005 INFO L226 Difference]: Without dead ends: 476 [2022-07-19 15:22:08,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=1572, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 15:22:08,005 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 517 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 1442 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:08,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [517 Valid, 1442 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:22:08,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2022-07-19 15:22:08,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 443. [2022-07-19 15:22:08,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 442 states have (on average 1.1199095022624435) internal successors, (495), 442 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:08,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 495 transitions. [2022-07-19 15:22:08,242 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 495 transitions. Word has length 38 [2022-07-19 15:22:08,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:08,242 INFO L495 AbstractCegarLoop]: Abstraction has 443 states and 495 transitions. [2022-07-19 15:22:08,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 30 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:08,242 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 495 transitions. [2022-07-19 15:22:08,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 15:22:08,243 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:08,243 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:08,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2022-07-19 15:22:08,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2022-07-19 15:22:08,443 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:08,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:08,443 INFO L85 PathProgramCache]: Analyzing trace with hash 130593719, now seen corresponding path program 57 times [2022-07-19 15:22:08,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:08,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697787415] [2022-07-19 15:22:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:08,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:08,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:08,678 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:22:08,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:08,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697787415] [2022-07-19 15:22:08,679 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697787415] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:08,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630614577] [2022-07-19 15:22:08,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:22:08,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:08,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:08,680 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:08,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2022-07-19 15:22:08,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-19 15:22:08,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:08,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 15:22:08,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:09,309 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:22:09,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:09,673 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:22:09,674 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630614577] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:09,674 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:09,674 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2022-07-19 15:22:09,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537572154] [2022-07-19 15:22:09,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:09,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 15:22:09,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:09,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 15:22:09,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=2217, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 15:22:09,675 INFO L87 Difference]: Start difference. First operand 443 states and 495 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:13,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:13,431 INFO L93 Difference]: Finished difference Result 768 states and 835 transitions. [2022-07-19 15:22:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-19 15:22:13,431 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-19 15:22:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:13,433 INFO L225 Difference]: With dead ends: 768 [2022-07-19 15:22:13,433 INFO L226 Difference]: Without dead ends: 726 [2022-07-19 15:22:13,433 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=2728, Invalid=10612, Unknown=0, NotChecked=0, Total=13340 [2022-07-19 15:22:13,434 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 2330 mSDsluCounter, 1480 mSDsCounter, 0 mSdLazyCounter, 909 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2330 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 1027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:13,434 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2330 Valid, 1565 Invalid, 1027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 909 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:22:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2022-07-19 15:22:13,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 490. [2022-07-19 15:22:13,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 1.1186094069529653) internal successors, (547), 489 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 547 transitions. [2022-07-19 15:22:13,693 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 547 transitions. Word has length 39 [2022-07-19 15:22:13,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:13,693 INFO L495 AbstractCegarLoop]: Abstraction has 490 states and 547 transitions. [2022-07-19 15:22:13,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 547 transitions. [2022-07-19 15:22:13,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 15:22:13,695 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:13,695 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:13,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2022-07-19 15:22:13,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:13,896 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:13,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:13,896 INFO L85 PathProgramCache]: Analyzing trace with hash -443143050, now seen corresponding path program 58 times [2022-07-19 15:22:13,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:13,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704872764] [2022-07-19 15:22:13,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:13,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:22:14,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:14,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704872764] [2022-07-19 15:22:14,159 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704872764] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:14,159 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508937466] [2022-07-19 15:22:14,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:22:14,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:14,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:14,163 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:14,165 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2022-07-19 15:22:14,211 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:22:14,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:14,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-19 15:22:14,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:22:14,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:15,199 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:22:15,200 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508937466] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:15,200 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:15,200 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2022-07-19 15:22:15,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977710108] [2022-07-19 15:22:15,200 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:15,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 15:22:15,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:15,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 15:22:15,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2218, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 15:22:15,201 INFO L87 Difference]: Start difference. First operand 490 states and 547 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:17,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:17,191 INFO L93 Difference]: Finished difference Result 752 states and 814 transitions. [2022-07-19 15:22:17,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 15:22:17,192 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-19 15:22:17,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:17,193 INFO L225 Difference]: With dead ends: 752 [2022-07-19 15:22:17,193 INFO L226 Difference]: Without dead ends: 731 [2022-07-19 15:22:17,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=477, Invalid=4779, Unknown=0, NotChecked=0, Total=5256 [2022-07-19 15:22:17,194 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 1489 mSDsluCounter, 3832 mSDsCounter, 0 mSdLazyCounter, 1407 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 3980 SdHoareTripleChecker+Invalid, 1467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:17,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1489 Valid, 3980 Invalid, 1467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 1407 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:22:17,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2022-07-19 15:22:17,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 495. [2022-07-19 15:22:17,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 1.1174089068825912) internal successors, (552), 494 states have internal predecessors, (552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 552 transitions. [2022-07-19 15:22:17,466 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 552 transitions. Word has length 39 [2022-07-19 15:22:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:17,466 INFO L495 AbstractCegarLoop]: Abstraction has 495 states and 552 transitions. [2022-07-19 15:22:17,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 552 transitions. [2022-07-19 15:22:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 15:22:17,467 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:17,467 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:17,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2022-07-19 15:22:17,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:17,671 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:17,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:17,672 INFO L85 PathProgramCache]: Analyzing trace with hash -24932840, now seen corresponding path program 59 times [2022-07-19 15:22:17,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:17,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831202736] [2022-07-19 15:22:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:17,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:17,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:17,741 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:22:17,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:17,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831202736] [2022-07-19 15:22:17,741 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831202736] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:17,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261231667] [2022-07-19 15:22:17,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:22:17,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:17,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:17,743 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:17,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2022-07-19 15:22:17,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 15:22:17,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:17,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 15:22:17,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:22:17,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:17,875 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:22:17,875 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261231667] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:17,875 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:17,875 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-19 15:22:17,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695087388] [2022-07-19 15:22:17,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:17,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 15:22:17,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:17,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 15:22:17,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2022-07-19 15:22:17,876 INFO L87 Difference]: Start difference. First operand 495 states and 552 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:18,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:18,300 INFO L93 Difference]: Finished difference Result 622 states and 690 transitions. [2022-07-19 15:22:18,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 15:22:18,300 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-19 15:22:18,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:18,301 INFO L225 Difference]: With dead ends: 622 [2022-07-19 15:22:18,301 INFO L226 Difference]: Without dead ends: 514 [2022-07-19 15:22:18,302 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2022-07-19 15:22:18,302 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 159 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:18,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 312 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:22:18,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-07-19 15:22:18,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 481. [2022-07-19 15:22:18,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 481 states, 480 states have (on average 1.1125) internal successors, (534), 480 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:18,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 534 transitions. [2022-07-19 15:22:18,565 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 534 transitions. Word has length 39 [2022-07-19 15:22:18,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:18,565 INFO L495 AbstractCegarLoop]: Abstraction has 481 states and 534 transitions. [2022-07-19 15:22:18,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:18,566 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 534 transitions. [2022-07-19 15:22:18,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-19 15:22:18,566 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:18,566 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:18,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2022-07-19 15:22:18,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2022-07-19 15:22:18,767 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:18,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:18,767 INFO L85 PathProgramCache]: Analyzing trace with hash -601397259, now seen corresponding path program 60 times [2022-07-19 15:22:18,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:18,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891137691] [2022-07-19 15:22:18,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:18,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:18,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:18,845 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:22:18,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:18,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891137691] [2022-07-19 15:22:18,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891137691] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:18,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770850165] [2022-07-19 15:22:18,846 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:22:18,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:18,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:18,848 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:18,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2022-07-19 15:22:18,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 15:22:18,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:18,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-19 15:22:18,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:18,961 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:22:18,961 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:22:18,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770850165] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:18,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:18,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2022-07-19 15:22:18,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020184650] [2022-07-19 15:22:18,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:18,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-19 15:22:18,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:18,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-19 15:22:18,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2022-07-19 15:22:18,987 INFO L87 Difference]: Start difference. First operand 481 states and 534 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:19,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:19,419 INFO L93 Difference]: Finished difference Result 521 states and 570 transitions. [2022-07-19 15:22:19,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-19 15:22:19,420 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2022-07-19 15:22:19,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:19,421 INFO L225 Difference]: With dead ends: 521 [2022-07-19 15:22:19,421 INFO L226 Difference]: Without dead ends: 515 [2022-07-19 15:22:19,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=304, Invalid=566, Unknown=0, NotChecked=0, Total=870 [2022-07-19 15:22:19,421 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 64 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:19,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 270 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 15:22:19,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-07-19 15:22:19,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 482. [2022-07-19 15:22:19,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:19,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2022-07-19 15:22:19,690 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 39 [2022-07-19 15:22:19,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:19,690 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2022-07-19 15:22:19,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:19,690 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2022-07-19 15:22:19,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 15:22:19,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:19,691 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:19,707 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2022-07-19 15:22:19,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2022-07-19 15:22:19,891 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:19,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:19,892 INFO L85 PathProgramCache]: Analyzing trace with hash -189895216, now seen corresponding path program 61 times [2022-07-19 15:22:19,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:19,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687673462] [2022-07-19 15:22:19,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:19,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:19,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:22:20,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:20,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687673462] [2022-07-19 15:22:20,307 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687673462] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:20,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251353474] [2022-07-19 15:22:20,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:22:20,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:20,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:20,308 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:20,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2022-07-19 15:22:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:20,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-19 15:22:20,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:22:20,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:22:21,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251353474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:21,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:21,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 47 [2022-07-19 15:22:21,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610888876] [2022-07-19 15:22:21,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:21,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-19 15:22:21,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:21,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-19 15:22:21,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2022-07-19 15:22:21,018 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:23,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:23,050 INFO L93 Difference]: Finished difference Result 872 states and 936 transitions. [2022-07-19 15:22:23,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 15:22:23,050 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-19 15:22:23,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:23,053 INFO L225 Difference]: With dead ends: 872 [2022-07-19 15:22:23,053 INFO L226 Difference]: Without dead ends: 863 [2022-07-19 15:22:23,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 58 SyntacticMatches, 5 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=340, Invalid=5360, Unknown=0, NotChecked=0, Total=5700 [2022-07-19 15:22:23,054 INFO L413 NwaCegarLoop]: 151 mSDtfsCounter, 283 mSDsluCounter, 4927 mSDsCounter, 0 mSdLazyCounter, 2316 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 5078 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:23,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [283 Valid, 5078 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2316 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 15:22:23,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-07-19 15:22:23,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 491. [2022-07-19 15:22:23,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 1.1122448979591837) internal successors, (545), 490 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 545 transitions. [2022-07-19 15:22:23,331 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 545 transitions. Word has length 40 [2022-07-19 15:22:23,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:23,332 INFO L495 AbstractCegarLoop]: Abstraction has 491 states and 545 transitions. [2022-07-19 15:22:23,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 47 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:23,332 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 545 transitions. [2022-07-19 15:22:23,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 15:22:23,332 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:23,332 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:23,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2022-07-19 15:22:23,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:23,535 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:23,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:23,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1171113072, now seen corresponding path program 62 times [2022-07-19 15:22:23,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:23,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436405923] [2022-07-19 15:22:23,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:23,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:23,911 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:22:23,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436405923] [2022-07-19 15:22:23,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436405923] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:23,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265470484] [2022-07-19 15:22:23,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:22:23,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:23,911 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:23,912 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:23,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2022-07-19 15:22:23,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:22:23,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:23,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-19 15:22:23,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:24,401 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:22:24,402 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:22:24,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265470484] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:24,610 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:24,610 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 45 [2022-07-19 15:22:24,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621160359] [2022-07-19 15:22:24,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:24,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 15:22:24,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:24,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 15:22:24,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1868, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 15:22:24,611 INFO L87 Difference]: Start difference. First operand 491 states and 545 transitions. Second operand has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:26,215 INFO L93 Difference]: Finished difference Result 719 states and 772 transitions. [2022-07-19 15:22:26,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 15:22:26,216 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-19 15:22:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:26,217 INFO L225 Difference]: With dead ends: 719 [2022-07-19 15:22:26,217 INFO L226 Difference]: Without dead ends: 692 [2022-07-19 15:22:26,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=313, Invalid=4657, Unknown=0, NotChecked=0, Total=4970 [2022-07-19 15:22:26,218 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 203 mSDsluCounter, 3206 mSDsCounter, 0 mSdLazyCounter, 1577 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 3329 SdHoareTripleChecker+Invalid, 1621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:26,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 3329 Invalid, 1621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:22:26,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2022-07-19 15:22:26,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 482. [2022-07-19 15:22:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.1122661122661122) internal successors, (535), 481 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:26,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 535 transitions. [2022-07-19 15:22:26,473 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 535 transitions. Word has length 40 [2022-07-19 15:22:26,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:26,473 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 535 transitions. [2022-07-19 15:22:26,473 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:26,473 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 535 transitions. [2022-07-19 15:22:26,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 15:22:26,474 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:26,474 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:26,490 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2022-07-19 15:22:26,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2022-07-19 15:22:26,675 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:26,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:26,675 INFO L85 PathProgramCache]: Analyzing trace with hash 722054608, now seen corresponding path program 63 times [2022-07-19 15:22:26,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:26,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688634944] [2022-07-19 15:22:26,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:26,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:26,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:27,075 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:22:27,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:27,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688634944] [2022-07-19 15:22:27,076 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688634944] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:27,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244652751] [2022-07-19 15:22:27,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:22:27,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:27,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:27,077 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:27,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2022-07-19 15:22:27,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 15:22:27,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:27,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 15:22:27,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:22:27,576 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:22:27,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244652751] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:27,774 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:27,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 43 [2022-07-19 15:22:27,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015235185] [2022-07-19 15:22:27,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:27,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 15:22:27,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:27,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 15:22:27,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1695, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 15:22:27,776 INFO L87 Difference]: Start difference. First operand 482 states and 535 transitions. Second operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:29,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:29,094 INFO L93 Difference]: Finished difference Result 617 states and 669 transitions. [2022-07-19 15:22:29,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 15:22:29,095 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-19 15:22:29,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:29,096 INFO L225 Difference]: With dead ends: 617 [2022-07-19 15:22:29,096 INFO L226 Difference]: Without dead ends: 589 [2022-07-19 15:22:29,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=307, Invalid=4115, Unknown=0, NotChecked=0, Total=4422 [2022-07-19 15:22:29,097 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 153 mSDsluCounter, 2199 mSDsCounter, 0 mSdLazyCounter, 1223 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 2288 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:29,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 2288 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1223 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:22:29,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2022-07-19 15:22:29,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 471. [2022-07-19 15:22:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1127659574468085) internal successors, (523), 470 states have internal predecessors, (523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:29,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 523 transitions. [2022-07-19 15:22:29,343 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 523 transitions. Word has length 40 [2022-07-19 15:22:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:29,344 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 523 transitions. [2022-07-19 15:22:29,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:29,344 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 523 transitions. [2022-07-19 15:22:29,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 15:22:29,344 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:29,344 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:29,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2022-07-19 15:22:29,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:29,545 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:29,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:29,546 INFO L85 PathProgramCache]: Analyzing trace with hash -923927664, now seen corresponding path program 64 times [2022-07-19 15:22:29,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:29,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656356269] [2022-07-19 15:22:29,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:29,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:29,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:29,843 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:22:29,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:29,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656356269] [2022-07-19 15:22:29,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656356269] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:29,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437477207] [2022-07-19 15:22:29,843 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:22:29,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:29,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:29,845 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:29,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2022-07-19 15:22:29,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:22:29,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:29,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-19 15:22:29,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:30,296 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:22:30,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:30,496 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:22:30,497 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437477207] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:30,497 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:30,497 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 41 [2022-07-19 15:22:30,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135458781] [2022-07-19 15:22:30,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:30,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-19 15:22:30,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:30,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-19 15:22:30,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2022-07-19 15:22:30,498 INFO L87 Difference]: Start difference. First operand 471 states and 523 transitions. Second operand has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:31,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:31,555 INFO L93 Difference]: Finished difference Result 535 states and 586 transitions. [2022-07-19 15:22:31,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 15:22:31,556 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-19 15:22:31,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:31,557 INFO L225 Difference]: With dead ends: 535 [2022-07-19 15:22:31,557 INFO L226 Difference]: Without dead ends: 506 [2022-07-19 15:22:31,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=301, Invalid=3605, Unknown=0, NotChecked=0, Total=3906 [2022-07-19 15:22:31,557 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 113 mSDsluCounter, 1347 mSDsCounter, 0 mSdLazyCounter, 939 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 1402 SdHoareTripleChecker+Invalid, 983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:31,557 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 1402 Invalid, 983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 939 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:22:31,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-07-19 15:22:31,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 458. [2022-07-19 15:22:31,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 458 states, 457 states have (on average 1.113785557986871) internal successors, (509), 457 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:31,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 458 states to 458 states and 509 transitions. [2022-07-19 15:22:31,814 INFO L78 Accepts]: Start accepts. Automaton has 458 states and 509 transitions. Word has length 40 [2022-07-19 15:22:31,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:31,814 INFO L495 AbstractCegarLoop]: Abstraction has 458 states and 509 transitions. [2022-07-19 15:22:31,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4878048780487805) internal successors, (61), 41 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:31,815 INFO L276 IsEmpty]: Start isEmpty. Operand 458 states and 509 transitions. [2022-07-19 15:22:31,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-07-19 15:22:31,816 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:31,816 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:31,839 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2022-07-19 15:22:32,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:32,039 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:32,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:32,039 INFO L85 PathProgramCache]: Analyzing trace with hash 137817552, now seen corresponding path program 65 times [2022-07-19 15:22:32,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:32,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995285854] [2022-07-19 15:22:32,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:32,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:32,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:22:32,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:32,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995285854] [2022-07-19 15:22:32,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995285854] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:32,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054889828] [2022-07-19 15:22:32,325 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:22:32,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:32,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:32,327 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:32,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2022-07-19 15:22:32,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 15:22:32,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:32,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-19 15:22:32,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:32,816 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:22:32,817 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:22:32,995 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054889828] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:32,995 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:32,995 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 39 [2022-07-19 15:22:32,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207739058] [2022-07-19 15:22:32,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:32,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-19 15:22:32,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:32,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-19 15:22:32,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2022-07-19 15:22:32,996 INFO L87 Difference]: Start difference. First operand 458 states and 509 transitions. Second operand has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:33,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:33,855 INFO L93 Difference]: Finished difference Result 504 states and 557 transitions. [2022-07-19 15:22:33,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 15:22:33,855 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2022-07-19 15:22:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:33,857 INFO L225 Difference]: With dead ends: 504 [2022-07-19 15:22:33,857 INFO L226 Difference]: Without dead ends: 498 [2022-07-19 15:22:33,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 56 SyntacticMatches, 7 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2022-07-19 15:22:33,857 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 578 mSDsCounter, 0 mSdLazyCounter, 606 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 601 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:33,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 601 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 606 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:22:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-07-19 15:22:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 471. [2022-07-19 15:22:34,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 1.1148936170212767) internal successors, (524), 470 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 524 transitions. [2022-07-19 15:22:34,115 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 524 transitions. Word has length 40 [2022-07-19 15:22:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:34,115 INFO L495 AbstractCegarLoop]: Abstraction has 471 states and 524 transitions. [2022-07-19 15:22:34,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.5128205128205128) internal successors, (59), 39 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:34,115 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 524 transitions. [2022-07-19 15:22:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 15:22:34,116 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:34,116 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:34,132 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2022-07-19 15:22:34,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2022-07-19 15:22:34,316 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:34,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:34,317 INFO L85 PathProgramCache]: Analyzing trace with hash -929146954, now seen corresponding path program 66 times [2022-07-19 15:22:34,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:34,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635531433] [2022-07-19 15:22:34,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:34,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:34,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:22:34,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:34,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635531433] [2022-07-19 15:22:34,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635531433] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:34,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603944899] [2022-07-19 15:22:34,578 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:22:34,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:34,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:34,579 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:34,580 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2022-07-19 15:22:34,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-19 15:22:34,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:34,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 15:22:34,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:22:35,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:22:35,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603944899] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:35,681 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:35,681 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2022-07-19 15:22:35,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617143845] [2022-07-19 15:22:35,681 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:35,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-19 15:22:35,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:35,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-19 15:22:35,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2713, Unknown=0, NotChecked=0, Total=2862 [2022-07-19 15:22:35,682 INFO L87 Difference]: Start difference. First operand 471 states and 524 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:40,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:40,648 INFO L93 Difference]: Finished difference Result 834 states and 902 transitions. [2022-07-19 15:22:40,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-19 15:22:40,649 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-19 15:22:40,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:40,650 INFO L225 Difference]: With dead ends: 834 [2022-07-19 15:22:40,650 INFO L226 Difference]: Without dead ends: 790 [2022-07-19 15:22:40,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3271 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=3617, Invalid=14205, Unknown=0, NotChecked=0, Total=17822 [2022-07-19 15:22:40,652 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 2756 mSDsluCounter, 1835 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2756 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 1340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:40,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2756 Valid, 1928 Invalid, 1340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:22:40,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 790 states. [2022-07-19 15:22:40,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 790 to 519. [2022-07-19 15:22:40,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 518 states have (on average 1.113899613899614) internal successors, (577), 518 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:40,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 577 transitions. [2022-07-19 15:22:40,943 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 577 transitions. Word has length 41 [2022-07-19 15:22:40,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:40,943 INFO L495 AbstractCegarLoop]: Abstraction has 519 states and 577 transitions. [2022-07-19 15:22:40,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:40,943 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 577 transitions. [2022-07-19 15:22:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 15:22:40,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:40,944 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:40,960 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2022-07-19 15:22:41,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:41,144 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:41,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1535117609, now seen corresponding path program 67 times [2022-07-19 15:22:41,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:41,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836772850] [2022-07-19 15:22:41,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:41,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:41,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:41,393 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:22:41,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:41,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836772850] [2022-07-19 15:22:41,393 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836772850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:41,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007391939] [2022-07-19 15:22:41,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:22:41,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:41,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:41,395 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:41,396 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2022-07-19 15:22:41,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:41,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-19 15:22:41,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:42,066 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:22:42,066 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:42,509 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:22:42,509 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007391939] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:42,509 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:42,509 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 54 [2022-07-19 15:22:42,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459918580] [2022-07-19 15:22:42,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:42,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-19 15:22:42,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:42,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-19 15:22:42,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2714, Unknown=0, NotChecked=0, Total=2862 [2022-07-19 15:22:42,510 INFO L87 Difference]: Start difference. First operand 519 states and 577 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:44,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:44,994 INFO L93 Difference]: Finished difference Result 817 states and 880 transitions. [2022-07-19 15:22:44,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 15:22:44,994 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-19 15:22:44,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:44,996 INFO L225 Difference]: With dead ends: 817 [2022-07-19 15:22:44,996 INFO L226 Difference]: Without dead ends: 795 [2022-07-19 15:22:44,996 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=561, Invalid=5919, Unknown=0, NotChecked=0, Total=6480 [2022-07-19 15:22:44,997 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 1960 mSDsluCounter, 5111 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1960 SdHoareTripleChecker+Valid, 5275 SdHoareTripleChecker+Invalid, 1965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:44,997 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1960 Valid, 5275 Invalid, 1965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 15:22:44,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2022-07-19 15:22:45,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 524. [2022-07-19 15:22:45,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.112810707456979) internal successors, (582), 523 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:45,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 582 transitions. [2022-07-19 15:22:45,304 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 582 transitions. Word has length 41 [2022-07-19 15:22:45,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:45,305 INFO L495 AbstractCegarLoop]: Abstraction has 524 states and 582 transitions. [2022-07-19 15:22:45,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:45,305 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 582 transitions. [2022-07-19 15:22:45,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 15:22:45,305 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:45,306 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:45,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2022-07-19 15:22:45,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:45,507 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:45,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:45,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1578640213, now seen corresponding path program 68 times [2022-07-19 15:22:45,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:45,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360562455] [2022-07-19 15:22:45,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:45,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:45,588 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:22:45,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:45,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360562455] [2022-07-19 15:22:45,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360562455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:45,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035470671] [2022-07-19 15:22:45,589 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:22:45,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:45,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:45,590 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:45,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2022-07-19 15:22:45,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:22:45,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:45,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 15:22:45,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:45,712 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:22:45,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:22:45,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035470671] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:45,738 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:45,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2022-07-19 15:22:45,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232595057] [2022-07-19 15:22:45,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:45,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 15:22:45,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:45,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 15:22:45,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-07-19 15:22:45,740 INFO L87 Difference]: Start difference. First operand 524 states and 582 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:46,350 INFO L93 Difference]: Finished difference Result 618 states and 684 transitions. [2022-07-19 15:22:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 15:22:46,351 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-19 15:22:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:46,352 INFO L225 Difference]: With dead ends: 618 [2022-07-19 15:22:46,352 INFO L226 Difference]: Without dead ends: 602 [2022-07-19 15:22:46,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 15:22:46,353 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 190 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:46,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 309 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:22:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-07-19 15:22:46,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 558. [2022-07-19 15:22:46,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 557 states have (on average 1.125673249551167) internal successors, (627), 557 states have internal predecessors, (627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:46,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 627 transitions. [2022-07-19 15:22:46,680 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 627 transitions. Word has length 41 [2022-07-19 15:22:46,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:46,680 INFO L495 AbstractCegarLoop]: Abstraction has 558 states and 627 transitions. [2022-07-19 15:22:46,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:46,681 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 627 transitions. [2022-07-19 15:22:46,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 15:22:46,681 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:46,681 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:46,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2022-07-19 15:22:46,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:46,882 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:46,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:46,882 INFO L85 PathProgramCache]: Analyzing trace with hash 888112408, now seen corresponding path program 69 times [2022-07-19 15:22:46,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:46,882 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461692924] [2022-07-19 15:22:46,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:46,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:46,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:46,972 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:22:46,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:46,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461692924] [2022-07-19 15:22:46,972 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461692924] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:46,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604934801] [2022-07-19 15:22:46,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:22:46,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:46,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:46,974 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:46,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2022-07-19 15:22:47,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 15:22:47,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:47,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 13 conjunts are in the unsatisfiable core [2022-07-19 15:22:47,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:47,124 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:22:47,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:47,151 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2022-07-19 15:22:47,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604934801] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:47,152 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:47,152 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 22 [2022-07-19 15:22:47,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322255855] [2022-07-19 15:22:47,152 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:47,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-19 15:22:47,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:47,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-19 15:22:47,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2022-07-19 15:22:47,153 INFO L87 Difference]: Start difference. First operand 558 states and 627 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:47,959 INFO L93 Difference]: Finished difference Result 996 states and 1135 transitions. [2022-07-19 15:22:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-19 15:22:47,959 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2022-07-19 15:22:47,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:47,961 INFO L225 Difference]: With dead ends: 996 [2022-07-19 15:22:47,961 INFO L226 Difference]: Without dead ends: 834 [2022-07-19 15:22:47,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=933, Unknown=0, NotChecked=0, Total=1260 [2022-07-19 15:22:47,961 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 321 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:47,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 465 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:22:47,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2022-07-19 15:22:48,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 640. [2022-07-19 15:22:48,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.1267605633802817) internal successors, (720), 639 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:48,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2022-07-19 15:22:48,358 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 41 [2022-07-19 15:22:48,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:48,359 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2022-07-19 15:22:48,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:48,359 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2022-07-19 15:22:48,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 15:22:48,360 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:48,360 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:48,376 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2022-07-19 15:22:48,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2022-07-19 15:22:48,560 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:48,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:48,560 INFO L85 PathProgramCache]: Analyzing trace with hash 318631823, now seen corresponding path program 70 times [2022-07-19 15:22:48,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:48,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053581242] [2022-07-19 15:22:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:48,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:48,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:49,032 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:22:49,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:49,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053581242] [2022-07-19 15:22:49,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053581242] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:49,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088622866] [2022-07-19 15:22:49,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:22:49,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:49,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:49,034 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:49,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2022-07-19 15:22:49,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:22:49,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:49,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-19 15:22:49,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:22:49,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:22:49,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088622866] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:49,797 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:49,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 50 [2022-07-19 15:22:49,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289312930] [2022-07-19 15:22:49,798 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:49,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-19 15:22:49,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:49,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-19 15:22:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=2330, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 15:22:49,799 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:52,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:52,307 INFO L93 Difference]: Finished difference Result 1165 states and 1259 transitions. [2022-07-19 15:22:52,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-19 15:22:52,308 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 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 42 [2022-07-19 15:22:52,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:52,310 INFO L225 Difference]: With dead ends: 1165 [2022-07-19 15:22:52,310 INFO L226 Difference]: Without dead ends: 1156 [2022-07-19 15:22:52,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 61 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=359, Invalid=6121, Unknown=0, NotChecked=0, Total=6480 [2022-07-19 15:22:52,311 INFO L413 NwaCegarLoop]: 168 mSDtfsCounter, 301 mSDsluCounter, 5128 mSDsCounter, 0 mSdLazyCounter, 2281 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 5296 SdHoareTripleChecker+Invalid, 2330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:52,311 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 5296 Invalid, 2330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2281 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 15:22:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2022-07-19 15:22:52,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 649. [2022-07-19 15:22:52,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 649 states, 648 states have (on average 1.126543209876543) internal successors, (730), 648 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:52,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 649 states to 649 states and 730 transitions. [2022-07-19 15:22:52,694 INFO L78 Accepts]: Start accepts. Automaton has 649 states and 730 transitions. Word has length 42 [2022-07-19 15:22:52,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:52,694 INFO L495 AbstractCegarLoop]: Abstraction has 649 states and 730 transitions. [2022-07-19 15:22:52,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:52,695 INFO L276 IsEmpty]: Start isEmpty. Operand 649 states and 730 transitions. [2022-07-19 15:22:52,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 15:22:52,696 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:52,696 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:52,719 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2022-07-19 15:22:52,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:52,919 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:52,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:52,920 INFO L85 PathProgramCache]: Analyzing trace with hash -225136977, now seen corresponding path program 71 times [2022-07-19 15:22:52,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:52,920 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915835804] [2022-07-19 15:22:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:52,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:52,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:22:53,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:53,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915835804] [2022-07-19 15:22:53,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915835804] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:53,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577164359] [2022-07-19 15:22:53,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:22:53,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:53,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:53,351 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:53,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2022-07-19 15:22:53,392 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 15:22:53,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:53,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-19 15:22:53,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:53,879 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:22:53,879 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:22:54,115 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577164359] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:54,115 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:54,115 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 48 [2022-07-19 15:22:54,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106393019] [2022-07-19 15:22:54,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:54,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-19 15:22:54,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:54,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-19 15:22:54,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2137, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 15:22:54,117 INFO L87 Difference]: Start difference. First operand 649 states and 730 transitions. Second operand has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:56,392 INFO L93 Difference]: Finished difference Result 983 states and 1063 transitions. [2022-07-19 15:22:56,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-19 15:22:56,392 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 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 42 [2022-07-19 15:22:56,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:56,394 INFO L225 Difference]: With dead ends: 983 [2022-07-19 15:22:56,394 INFO L226 Difference]: Without dead ends: 955 [2022-07-19 15:22:56,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=331, Invalid=5369, Unknown=0, NotChecked=0, Total=5700 [2022-07-19 15:22:56,395 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 219 mSDsluCounter, 4540 mSDsCounter, 0 mSdLazyCounter, 2264 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 4676 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 2264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:56,395 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 4676 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 2264 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 15:22:56,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2022-07-19 15:22:56,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 640. [2022-07-19 15:22:56,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 639 states have (on average 1.1267605633802817) internal successors, (720), 639 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:56,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 720 transitions. [2022-07-19 15:22:56,770 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 720 transitions. Word has length 42 [2022-07-19 15:22:56,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:22:56,771 INFO L495 AbstractCegarLoop]: Abstraction has 640 states and 720 transitions. [2022-07-19 15:22:56,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:56,771 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 720 transitions. [2022-07-19 15:22:56,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 15:22:56,771 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:22:56,772 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:22:56,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2022-07-19 15:22:56,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:56,972 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:22:56,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:22:56,972 INFO L85 PathProgramCache]: Analyzing trace with hash -284040433, now seen corresponding path program 72 times [2022-07-19 15:22:56,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:22:56,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616342687] [2022-07-19 15:22:56,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:22:56,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:22:56,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:22:57,349 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:22:57,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:22:57,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616342687] [2022-07-19 15:22:57,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616342687] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:22:57,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680294073] [2022-07-19 15:22:57,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:22:57,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:22:57,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:22:57,351 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:22:57,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2022-07-19 15:22:57,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 15:22:57,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:22:57,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-19 15:22:57,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:22:57,935 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:22:57,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:22:58,182 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:22:58,182 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680294073] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:22:58,182 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:22:58,182 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 46 [2022-07-19 15:22:58,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088583970] [2022-07-19 15:22:58,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:22:58,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 15:22:58,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:22:58,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 15:22:58,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1952, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 15:22:58,183 INFO L87 Difference]: Start difference. First operand 640 states and 720 transitions. Second operand has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:22:59,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:22:59,980 INFO L93 Difference]: Finished difference Result 853 states and 932 transitions. [2022-07-19 15:22:59,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 15:22:59,981 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-19 15:22:59,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:22:59,982 INFO L225 Difference]: With dead ends: 853 [2022-07-19 15:22:59,982 INFO L226 Difference]: Without dead ends: 824 [2022-07-19 15:22:59,983 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 932 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=325, Invalid=4787, Unknown=0, NotChecked=0, Total=5112 [2022-07-19 15:22:59,983 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 179 mSDsluCounter, 2608 mSDsCounter, 0 mSdLazyCounter, 1420 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 2710 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:22:59,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 2710 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 1420 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:22:59,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-07-19 15:23:00,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 629. [2022-07-19 15:23:00,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 1.127388535031847) internal successors, (708), 628 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:00,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 708 transitions. [2022-07-19 15:23:00,349 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 708 transitions. Word has length 42 [2022-07-19 15:23:00,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:00,349 INFO L495 AbstractCegarLoop]: Abstraction has 629 states and 708 transitions. [2022-07-19 15:23:00,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:00,349 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 708 transitions. [2022-07-19 15:23:00,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 15:23:00,350 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:00,350 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:00,366 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2022-07-19 15:23:00,550 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2022-07-19 15:23:00,550 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:00,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:00,551 INFO L85 PathProgramCache]: Analyzing trace with hash -2122368209, now seen corresponding path program 73 times [2022-07-19 15:23:00,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:00,551 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044859717] [2022-07-19 15:23:00,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:00,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:00,866 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:23:00,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:00,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044859717] [2022-07-19 15:23:00,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044859717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:00,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127011531] [2022-07-19 15:23:00,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:23:00,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:00,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:00,868 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:00,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2022-07-19 15:23:00,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:00,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 15:23:00,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:01,356 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:23:01,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:23:01,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127011531] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:01,559 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:01,559 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 44 [2022-07-19 15:23:01,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744142420] [2022-07-19 15:23:01,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:01,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-19 15:23:01,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:01,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-19 15:23:01,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2022-07-19 15:23:01,560 INFO L87 Difference]: Start difference. First operand 629 states and 708 transitions. Second operand has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:03,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:03,047 INFO L93 Difference]: Finished difference Result 754 states and 832 transitions. [2022-07-19 15:23:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 15:23:03,047 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-19 15:23:03,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:03,049 INFO L225 Difference]: With dead ends: 754 [2022-07-19 15:23:03,049 INFO L226 Difference]: Without dead ends: 724 [2022-07-19 15:23:03,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=319, Invalid=4237, Unknown=0, NotChecked=0, Total=4556 [2022-07-19 15:23:03,049 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 142 mSDsluCounter, 1606 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:03,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 1674 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:23:03,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-07-19 15:23:03,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 616. [2022-07-19 15:23:03,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 1.1284552845528455) internal successors, (694), 615 states have internal predecessors, (694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:03,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 694 transitions. [2022-07-19 15:23:03,406 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 694 transitions. Word has length 42 [2022-07-19 15:23:03,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:03,406 INFO L495 AbstractCegarLoop]: Abstraction has 616 states and 694 transitions. [2022-07-19 15:23:03,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:03,407 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 694 transitions. [2022-07-19 15:23:03,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 15:23:03,407 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:03,407 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:03,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2022-07-19 15:23:03,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:03,611 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:03,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:03,612 INFO L85 PathProgramCache]: Analyzing trace with hash -147720610, now seen corresponding path program 74 times [2022-07-19 15:23:03,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:03,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727510379] [2022-07-19 15:23:03,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:03,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:03,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:03,775 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-19 15:23:03,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:03,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727510379] [2022-07-19 15:23:03,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727510379] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:03,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866776721] [2022-07-19 15:23:03,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:23:03,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:03,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:03,777 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:03,791 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2022-07-19 15:23:03,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:23:03,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:23:03,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 15:23:03,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:04,175 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 15:23:04,176 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:04,403 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 15:23:04,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866776721] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:04,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:04,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-07-19 15:23:04,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233028643] [2022-07-19 15:23:04,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:04,404 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 15:23:04,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:04,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 15:23:04,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 15:23:04,404 INFO L87 Difference]: Start difference. First operand 616 states and 694 transitions. Second operand has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:06,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:06,276 INFO L93 Difference]: Finished difference Result 816 states and 910 transitions. [2022-07-19 15:23:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-19 15:23:06,276 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 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 42 [2022-07-19 15:23:06,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:06,278 INFO L225 Difference]: With dead ends: 816 [2022-07-19 15:23:06,278 INFO L226 Difference]: Without dead ends: 753 [2022-07-19 15:23:06,279 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 734 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1040, Invalid=3790, Unknown=0, NotChecked=0, Total=4830 [2022-07-19 15:23:06,279 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 1115 mSDsluCounter, 788 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1115 SdHoareTripleChecker+Valid, 852 SdHoareTripleChecker+Invalid, 428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:06,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1115 Valid, 852 Invalid, 428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:23:06,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-07-19 15:23:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 681. [2022-07-19 15:23:06,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 1.1147058823529412) internal successors, (758), 680 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:06,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 758 transitions. [2022-07-19 15:23:06,720 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 758 transitions. Word has length 42 [2022-07-19 15:23:06,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:06,720 INFO L495 AbstractCegarLoop]: Abstraction has 681 states and 758 transitions. [2022-07-19 15:23:06,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6285714285714286) internal successors, (57), 35 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:06,720 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 758 transitions. [2022-07-19 15:23:06,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 15:23:06,721 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:06,721 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:06,737 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2022-07-19 15:23:06,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:06,921 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:06,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:06,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1018615439, now seen corresponding path program 75 times [2022-07-19 15:23:06,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:06,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299662611] [2022-07-19 15:23:06,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:06,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:23:07,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:07,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299662611] [2022-07-19 15:23:07,208 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299662611] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:07,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803450474] [2022-07-19 15:23:07,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:23:07,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:07,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:07,209 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:07,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2022-07-19 15:23:07,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-19 15:23:07,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:23:07,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-19 15:23:07,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:23:07,690 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:07,879 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:23:07,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803450474] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:07,879 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:07,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 42 [2022-07-19 15:23:07,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511594676] [2022-07-19 15:23:07,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:07,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-19 15:23:07,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:07,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-19 15:23:07,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1606, Unknown=0, NotChecked=0, Total=1722 [2022-07-19 15:23:07,880 INFO L87 Difference]: Start difference. First operand 681 states and 758 transitions. Second operand has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:09,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:09,214 INFO L93 Difference]: Finished difference Result 774 states and 854 transitions. [2022-07-19 15:23:09,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-19 15:23:09,214 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-19 15:23:09,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:09,216 INFO L225 Difference]: With dead ends: 774 [2022-07-19 15:23:09,216 INFO L226 Difference]: Without dead ends: 743 [2022-07-19 15:23:09,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 59 SyntacticMatches, 7 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 764 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=3719, Unknown=0, NotChecked=0, Total=4032 [2022-07-19 15:23:09,217 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 108 mSDsluCounter, 992 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1032 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:09,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1032 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:23:09,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-07-19 15:23:09,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 677. [2022-07-19 15:23:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.1168639053254439) internal successors, (755), 676 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:09,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 755 transitions. [2022-07-19 15:23:09,645 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 755 transitions. Word has length 42 [2022-07-19 15:23:09,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:09,646 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 755 transitions. [2022-07-19 15:23:09,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.4761904761904763) internal successors, (62), 42 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:09,646 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 755 transitions. [2022-07-19 15:23:09,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-07-19 15:23:09,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:09,647 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:09,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2022-07-19 15:23:09,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:09,847 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:09,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:09,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1114544290, now seen corresponding path program 76 times [2022-07-19 15:23:09,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:09,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811209175] [2022-07-19 15:23:09,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:09,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:09,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:09,979 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-19 15:23:09,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:09,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811209175] [2022-07-19 15:23:09,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811209175] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:09,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336615209] [2022-07-19 15:23:09,980 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:23:09,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:09,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:09,981 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:09,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2022-07-19 15:23:10,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:23:10,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:23:10,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-19 15:23:10,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:10,292 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 15:23:10,292 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:10,492 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2022-07-19 15:23:10,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336615209] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:10,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:10,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 35 [2022-07-19 15:23:10,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971934617] [2022-07-19 15:23:10,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:10,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 15:23:10,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:10,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 15:23:10,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1089, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 15:23:10,494 INFO L87 Difference]: Start difference. First operand 677 states and 755 transitions. Second operand has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:11,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:11,769 INFO L93 Difference]: Finished difference Result 755 states and 828 transitions. [2022-07-19 15:23:11,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 15:23:11,770 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2022-07-19 15:23:11,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:11,771 INFO L225 Difference]: With dead ends: 755 [2022-07-19 15:23:11,771 INFO L226 Difference]: Without dead ends: 721 [2022-07-19 15:23:11,772 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=2251, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 15:23:11,772 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 774 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 787 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 2110 SdHoareTripleChecker+Invalid, 830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:11,772 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [774 Valid, 2110 Invalid, 830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 787 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:23:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-07-19 15:23:12,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 677. [2022-07-19 15:23:12,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 677 states, 676 states have (on average 1.1020710059171597) internal successors, (745), 676 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:12,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 677 states to 677 states and 745 transitions. [2022-07-19 15:23:12,347 INFO L78 Accepts]: Start accepts. Automaton has 677 states and 745 transitions. Word has length 42 [2022-07-19 15:23:12,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:12,348 INFO L495 AbstractCegarLoop]: Abstraction has 677 states and 745 transitions. [2022-07-19 15:23:12,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.6571428571428573) internal successors, (58), 35 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:12,348 INFO L276 IsEmpty]: Start isEmpty. Operand 677 states and 745 transitions. [2022-07-19 15:23:12,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 15:23:12,349 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:12,349 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:12,368 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2022-07-19 15:23:12,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2022-07-19 15:23:12,563 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:12,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:12,564 INFO L85 PathProgramCache]: Analyzing trace with hash 1950289367, now seen corresponding path program 77 times [2022-07-19 15:23:12,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:12,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285502007] [2022-07-19 15:23:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:12,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:12,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:23:12,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:12,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285502007] [2022-07-19 15:23:12,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285502007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:12,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672067137] [2022-07-19 15:23:12,846 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:23:12,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:12,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:12,847 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:12,848 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2022-07-19 15:23:12,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-19 15:23:12,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:23:12,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 15:23:12,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:13,613 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:23:13,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:14,116 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:23:14,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672067137] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:14,116 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:14,116 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2022-07-19 15:23:14,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663250476] [2022-07-19 15:23:14,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:14,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-19 15:23:14,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:14,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-19 15:23:14,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3259, Unknown=0, NotChecked=0, Total=3422 [2022-07-19 15:23:14,117 INFO L87 Difference]: Start difference. First operand 677 states and 745 transitions. Second operand has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:20,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:20,828 INFO L93 Difference]: Finished difference Result 1173 states and 1259 transitions. [2022-07-19 15:23:20,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-19 15:23:20,829 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 0 states have call successors, (0), 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 43 [2022-07-19 15:23:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:20,830 INFO L225 Difference]: With dead ends: 1173 [2022-07-19 15:23:20,830 INFO L226 Difference]: Without dead ends: 1125 [2022-07-19 15:23:20,831 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4452 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=4689, Invalid=18567, Unknown=0, NotChecked=0, Total=23256 [2022-07-19 15:23:20,832 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 2841 mSDsluCounter, 2344 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2841 SdHoareTripleChecker+Valid, 2446 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 155 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:20,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2841 Valid, 2446 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [155 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 15:23:20,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2022-07-19 15:23:21,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 743. [2022-07-19 15:23:21,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.101078167115903) internal successors, (817), 742 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:21,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 817 transitions. [2022-07-19 15:23:21,337 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 817 transitions. Word has length 43 [2022-07-19 15:23:21,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:21,337 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 817 transitions. [2022-07-19 15:23:21,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:21,338 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 817 transitions. [2022-07-19 15:23:21,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 15:23:21,339 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:21,339 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:21,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2022-07-19 15:23:21,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2022-07-19 15:23:21,561 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:21,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:21,562 INFO L85 PathProgramCache]: Analyzing trace with hash 345068246, now seen corresponding path program 78 times [2022-07-19 15:23:21,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:21,562 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309953595] [2022-07-19 15:23:21,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:21,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:21,879 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:23:21,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:21,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309953595] [2022-07-19 15:23:21,879 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309953595] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:21,879 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667627126] [2022-07-19 15:23:21,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:23:21,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:21,880 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:21,881 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:21,882 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2022-07-19 15:23:21,928 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-07-19 15:23:21,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:23:21,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-19 15:23:21,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:22,668 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:23:22,668 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:23:23,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667627126] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:23,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:23,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 59 [2022-07-19 15:23:23,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984506642] [2022-07-19 15:23:23,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:23,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-07-19 15:23:23,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:23,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-07-19 15:23:23,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=3260, Unknown=0, NotChecked=0, Total=3422 [2022-07-19 15:23:23,182 INFO L87 Difference]: Start difference. First operand 743 states and 817 transitions. Second operand has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:26,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:26,618 INFO L93 Difference]: Finished difference Result 1155 states and 1235 transitions. [2022-07-19 15:23:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 15:23:26,618 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 0 states have call successors, (0), 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 43 [2022-07-19 15:23:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:26,620 INFO L225 Difference]: With dead ends: 1155 [2022-07-19 15:23:26,620 INFO L226 Difference]: Without dead ends: 1131 [2022-07-19 15:23:26,620 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=651, Invalid=7181, Unknown=0, NotChecked=0, Total=7832 [2022-07-19 15:23:26,621 INFO L413 NwaCegarLoop]: 180 mSDtfsCounter, 2324 mSDsluCounter, 6232 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2324 SdHoareTripleChecker+Valid, 6412 SdHoareTripleChecker+Invalid, 2492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:26,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2324 Valid, 6412 Invalid, 2492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 2319 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 15:23:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2022-07-19 15:23:27,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 749. [2022-07-19 15:23:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 1.1002673796791445) internal successors, (823), 748 states have internal predecessors, (823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:27,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 823 transitions. [2022-07-19 15:23:27,146 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 823 transitions. Word has length 43 [2022-07-19 15:23:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:27,146 INFO L495 AbstractCegarLoop]: Abstraction has 749 states and 823 transitions. [2022-07-19 15:23:27,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5084745762711864) internal successors, (89), 59 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 823 transitions. [2022-07-19 15:23:27,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 15:23:27,147 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:27,147 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:27,163 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2022-07-19 15:23:27,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2022-07-19 15:23:27,348 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:27,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:27,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1718266860, now seen corresponding path program 79 times [2022-07-19 15:23:27,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:27,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537768272] [2022-07-19 15:23:27,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:27,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 15:23:27,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:27,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537768272] [2022-07-19 15:23:27,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537768272] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:27,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574331650] [2022-07-19 15:23:27,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:23:27,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:27,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:27,428 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:27,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2022-07-19 15:23:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:27,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 15:23:27,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 15:23:27,553 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:27,582 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 15:23:27,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574331650] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:27,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:27,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-19 15:23:27,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128138168] [2022-07-19 15:23:27,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:27,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 15:23:27,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:27,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 15:23:27,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:23:27,584 INFO L87 Difference]: Start difference. First operand 749 states and 823 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:28,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:28,370 INFO L93 Difference]: Finished difference Result 919 states and 1007 transitions. [2022-07-19 15:23:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 15:23:28,371 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-19 15:23:28,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:28,372 INFO L225 Difference]: With dead ends: 919 [2022-07-19 15:23:28,372 INFO L226 Difference]: Without dead ends: 779 [2022-07-19 15:23:28,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=487, Invalid=919, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 15:23:28,372 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 173 mSDsluCounter, 326 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:28,372 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [173 Valid, 382 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:23:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2022-07-19 15:23:28,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 735. [2022-07-19 15:23:28,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 1.0967302452316077) internal successors, (805), 734 states have internal predecessors, (805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:28,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 805 transitions. [2022-07-19 15:23:28,873 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 805 transitions. Word has length 43 [2022-07-19 15:23:28,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:28,873 INFO L495 AbstractCegarLoop]: Abstraction has 735 states and 805 transitions. [2022-07-19 15:23:28,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:28,873 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 805 transitions. [2022-07-19 15:23:28,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-07-19 15:23:28,874 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:28,874 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:28,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2022-07-19 15:23:29,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2022-07-19 15:23:29,074 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:29,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:29,075 INFO L85 PathProgramCache]: Analyzing trace with hash -2059418347, now seen corresponding path program 80 times [2022-07-19 15:23:29,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:29,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024577947] [2022-07-19 15:23:29,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:29,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:29,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:29,176 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 15:23:29,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:29,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024577947] [2022-07-19 15:23:29,177 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024577947] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:29,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645960107] [2022-07-19 15:23:29,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:23:29,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:29,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:29,179 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:29,192 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2022-07-19 15:23:29,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:23:29,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:23:29,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-19 15:23:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 15:23:29,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 15:23:29,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645960107] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:29,343 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:29,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-19 15:23:29,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30935108] [2022-07-19 15:23:29,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:29,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-19 15:23:29,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:29,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-19 15:23:29,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2022-07-19 15:23:29,345 INFO L87 Difference]: Start difference. First operand 735 states and 805 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:30,142 INFO L93 Difference]: Finished difference Result 786 states and 851 transitions. [2022-07-19 15:23:30,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 15:23:30,142 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2022-07-19 15:23:30,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:30,143 INFO L225 Difference]: With dead ends: 786 [2022-07-19 15:23:30,143 INFO L226 Difference]: Without dead ends: 780 [2022-07-19 15:23:30,144 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=487, Invalid=919, Unknown=0, NotChecked=0, Total=1406 [2022-07-19 15:23:30,144 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 80 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 386 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:30,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 386 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:23:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2022-07-19 15:23:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 736. [2022-07-19 15:23:30,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.0965986394557823) internal successors, (806), 735 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:30,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 806 transitions. [2022-07-19 15:23:30,683 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 806 transitions. Word has length 43 [2022-07-19 15:23:30,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:30,684 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 806 transitions. [2022-07-19 15:23:30,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:30,684 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 806 transitions. [2022-07-19 15:23:30,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 15:23:30,685 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:30,685 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:30,701 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2022-07-19 15:23:30,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:30,885 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:30,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:30,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1525148816, now seen corresponding path program 81 times [2022-07-19 15:23:30,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:30,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386131623] [2022-07-19 15:23:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:30,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:23:31,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:31,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386131623] [2022-07-19 15:23:31,390 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386131623] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:31,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926310938] [2022-07-19 15:23:31,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:23:31,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:31,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:31,392 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:31,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2022-07-19 15:23:31,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-19 15:23:31,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:23:31,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-19 15:23:31,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:31,990 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:23:31,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:23:32,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926310938] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:32,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:32,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 53 [2022-07-19 15:23:32,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183237384] [2022-07-19 15:23:32,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:32,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 15:23:32,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:32,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 15:23:32,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2629, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 15:23:32,232 INFO L87 Difference]: Start difference. First operand 736 states and 806 transitions. Second operand has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:35,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:35,254 INFO L93 Difference]: Finished difference Result 1317 states and 1400 transitions. [2022-07-19 15:23:35,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-07-19 15:23:35,255 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-19 15:23:35,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:35,256 INFO L225 Difference]: With dead ends: 1317 [2022-07-19 15:23:35,256 INFO L226 Difference]: Without dead ends: 1308 [2022-07-19 15:23:35,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 64 SyntacticMatches, 5 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1311 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=378, Invalid=6932, Unknown=0, NotChecked=0, Total=7310 [2022-07-19 15:23:35,257 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 322 mSDsluCounter, 6069 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 6254 SdHoareTripleChecker+Invalid, 2779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:35,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 6254 Invalid, 2779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2727 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 15:23:35,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2022-07-19 15:23:35,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 745. [2022-07-19 15:23:35,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 1.096774193548387) internal successors, (816), 744 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:35,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 816 transitions. [2022-07-19 15:23:35,773 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 816 transitions. Word has length 44 [2022-07-19 15:23:35,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:35,773 INFO L495 AbstractCegarLoop]: Abstraction has 745 states and 816 transitions. [2022-07-19 15:23:35,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.3584905660377358) internal successors, (72), 53 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:35,773 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 816 transitions. [2022-07-19 15:23:35,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 15:23:35,774 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:35,775 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:35,799 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2022-07-19 15:23:35,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:35,987 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:35,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:35,988 INFO L85 PathProgramCache]: Analyzing trace with hash 39040176, now seen corresponding path program 82 times [2022-07-19 15:23:35,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:35,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807027429] [2022-07-19 15:23:35,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:35,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:36,462 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:23:36,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:36,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807027429] [2022-07-19 15:23:36,463 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807027429] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:36,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500953798] [2022-07-19 15:23:36,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:23:36,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:36,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:36,465 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:36,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2022-07-19 15:23:36,506 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:23:36,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:23:36,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-19 15:23:36,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:37,059 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:23:37,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:23:37,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500953798] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:37,302 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:37,302 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 51 [2022-07-19 15:23:37,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076504532] [2022-07-19 15:23:37,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:37,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-19 15:23:37,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:37,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-19 15:23:37,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=2424, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 15:23:37,303 INFO L87 Difference]: Start difference. First operand 745 states and 816 transitions. Second operand has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:39,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:39,946 INFO L93 Difference]: Finished difference Result 1118 states and 1188 transitions. [2022-07-19 15:23:39,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-19 15:23:39,946 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-19 15:23:39,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:39,948 INFO L225 Difference]: With dead ends: 1118 [2022-07-19 15:23:39,948 INFO L226 Difference]: Without dead ends: 1089 [2022-07-19 15:23:39,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=349, Invalid=6131, Unknown=0, NotChecked=0, Total=6480 [2022-07-19 15:23:39,949 INFO L413 NwaCegarLoop]: 157 mSDtfsCounter, 240 mSDsluCounter, 5000 mSDsCounter, 0 mSdLazyCounter, 2378 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 5157 SdHoareTripleChecker+Invalid, 2426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:39,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 5157 Invalid, 2426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2378 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 15:23:39,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1089 states. [2022-07-19 15:23:40,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1089 to 736. [2022-07-19 15:23:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 735 states have (on average 1.0965986394557823) internal successors, (806), 735 states have internal predecessors, (806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:40,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 806 transitions. [2022-07-19 15:23:40,498 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 806 transitions. Word has length 44 [2022-07-19 15:23:40,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:40,498 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 806 transitions. [2022-07-19 15:23:40,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.392156862745098) internal successors, (71), 51 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 806 transitions. [2022-07-19 15:23:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 15:23:40,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:40,499 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:40,515 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2022-07-19 15:23:40,700 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:40,700 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:40,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:40,700 INFO L85 PathProgramCache]: Analyzing trace with hash 888591216, now seen corresponding path program 83 times [2022-07-19 15:23:40,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:40,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569522520] [2022-07-19 15:23:40,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:40,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:41,141 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:23:41,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:41,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569522520] [2022-07-19 15:23:41,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569522520] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:41,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746935791] [2022-07-19 15:23:41,142 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:23:41,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:41,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:41,143 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:41,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2022-07-19 15:23:41,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 15:23:41,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:23:41,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-19 15:23:41,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:41,717 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:23:41,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:41,947 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:23:41,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746935791] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:41,947 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:41,947 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 49 [2022-07-19 15:23:41,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930590331] [2022-07-19 15:23:41,947 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:41,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 15:23:41,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:41,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 15:23:41,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2227, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 15:23:41,948 INFO L87 Difference]: Start difference. First operand 736 states and 806 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:44,197 INFO L93 Difference]: Finished difference Result 977 states and 1046 transitions. [2022-07-19 15:23:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-19 15:23:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-19 15:23:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:44,198 INFO L225 Difference]: With dead ends: 977 [2022-07-19 15:23:44,198 INFO L226 Difference]: Without dead ends: 947 [2022-07-19 15:23:44,199 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=343, Invalid=5509, Unknown=0, NotChecked=0, Total=5852 [2022-07-19 15:23:44,199 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 198 mSDsluCounter, 3600 mSDsCounter, 0 mSdLazyCounter, 1882 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 3723 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:44,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 3723 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1882 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 15:23:44,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 947 states. [2022-07-19 15:23:44,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 947 to 725. [2022-07-19 15:23:44,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 725 states, 724 states have (on average 1.0966850828729282) internal successors, (794), 724 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 794 transitions. [2022-07-19 15:23:44,689 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 794 transitions. Word has length 44 [2022-07-19 15:23:44,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:44,689 INFO L495 AbstractCegarLoop]: Abstraction has 725 states and 794 transitions. [2022-07-19 15:23:44,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:44,689 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 794 transitions. [2022-07-19 15:23:44,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 15:23:44,690 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:44,690 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:44,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2022-07-19 15:23:44,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:44,895 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:44,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:44,896 INFO L85 PathProgramCache]: Analyzing trace with hash -359009104, now seen corresponding path program 84 times [2022-07-19 15:23:44,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:44,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96797122] [2022-07-19 15:23:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:44,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:44,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:45,258 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:23:45,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:45,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96797122] [2022-07-19 15:23:45,258 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96797122] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:45,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660522759] [2022-07-19 15:23:45,258 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:23:45,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:45,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:45,260 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:45,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2022-07-19 15:23:45,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2022-07-19 15:23:45,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:23:45,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-19 15:23:45,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:23:45,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:46,039 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:23:46,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660522759] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:46,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:46,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 47 [2022-07-19 15:23:46,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981024410] [2022-07-19 15:23:46,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:46,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-19 15:23:46,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:46,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-19 15:23:46,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=2038, Unknown=0, NotChecked=0, Total=2162 [2022-07-19 15:23:46,041 INFO L87 Difference]: Start difference. First operand 725 states and 794 transitions. Second operand has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:47,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:47,865 INFO L93 Difference]: Finished difference Result 869 states and 937 transitions. [2022-07-19 15:23:47,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 15:23:47,865 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-19 15:23:47,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:47,866 INFO L225 Difference]: With dead ends: 869 [2022-07-19 15:23:47,866 INFO L226 Difference]: Without dead ends: 838 [2022-07-19 15:23:47,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 976 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=337, Invalid=4919, Unknown=0, NotChecked=0, Total=5256 [2022-07-19 15:23:47,867 INFO L413 NwaCegarLoop]: 89 mSDtfsCounter, 154 mSDsluCounter, 2243 mSDsCounter, 0 mSdLazyCounter, 1317 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 2332 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:47,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 2332 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:23:47,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2022-07-19 15:23:48,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 712. [2022-07-19 15:23:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 711 states have (on average 1.0970464135021096) internal successors, (780), 711 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:48,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 780 transitions. [2022-07-19 15:23:48,346 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 780 transitions. Word has length 44 [2022-07-19 15:23:48,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:48,346 INFO L495 AbstractCegarLoop]: Abstraction has 712 states and 780 transitions. [2022-07-19 15:23:48,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.425531914893617) internal successors, (67), 47 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:48,346 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 780 transitions. [2022-07-19 15:23:48,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 15:23:48,347 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:48,347 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:48,363 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2022-07-19 15:23:48,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:48,547 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:48,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:48,548 INFO L85 PathProgramCache]: Analyzing trace with hash -1685351568, now seen corresponding path program 85 times [2022-07-19 15:23:48,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:48,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829483775] [2022-07-19 15:23:48,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:48,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:48,882 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:23:48,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:48,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829483775] [2022-07-19 15:23:48,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829483775] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:48,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066705168] [2022-07-19 15:23:48,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:23:48,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:48,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:48,883 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:48,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2022-07-19 15:23:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:48,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 15:23:48,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:23:49,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:49,635 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:23:49,636 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066705168] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:49,636 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:49,636 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 45 [2022-07-19 15:23:49,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753442497] [2022-07-19 15:23:49,636 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:49,636 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-19 15:23:49,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-19 15:23:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1857, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 15:23:49,637 INFO L87 Difference]: Start difference. First operand 712 states and 780 transitions. Second operand has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:51,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:51,081 INFO L93 Difference]: Finished difference Result 780 states and 847 transitions. [2022-07-19 15:23:51,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 15:23:51,082 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-19 15:23:51,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:51,083 INFO L225 Difference]: With dead ends: 780 [2022-07-19 15:23:51,083 INFO L226 Difference]: Without dead ends: 748 [2022-07-19 15:23:51,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=331, Invalid=4361, Unknown=0, NotChecked=0, Total=4692 [2022-07-19 15:23:51,084 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 116 mSDsluCounter, 1308 mSDsCounter, 0 mSdLazyCounter, 974 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 1363 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:51,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 1363 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 974 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 15:23:51,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-07-19 15:23:51,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 697. [2022-07-19 15:23:51,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 697 states, 696 states have (on average 1.0977011494252873) internal successors, (764), 696 states have internal predecessors, (764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:51,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 764 transitions. [2022-07-19 15:23:51,555 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 764 transitions. Word has length 44 [2022-07-19 15:23:51,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:51,555 INFO L495 AbstractCegarLoop]: Abstraction has 697 states and 764 transitions. [2022-07-19 15:23:51,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.4444444444444444) internal successors, (65), 45 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:51,555 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 764 transitions. [2022-07-19 15:23:51,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-19 15:23:51,556 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:51,556 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:51,578 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2022-07-19 15:23:51,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2022-07-19 15:23:51,774 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:51,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:51,774 INFO L85 PathProgramCache]: Analyzing trace with hash -2111163216, now seen corresponding path program 86 times [2022-07-19 15:23:51,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:51,775 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575481307] [2022-07-19 15:23:51,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:51,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:52,052 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 15:23:52,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:52,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575481307] [2022-07-19 15:23:52,052 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575481307] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:52,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517928763] [2022-07-19 15:23:52,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:23:52,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:52,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:52,053 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:52,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2022-07-19 15:23:52,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:23:52,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:23:52,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-19 15:23:52,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:52,574 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 15:23:52,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 15:23:52,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517928763] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:52,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:52,773 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 43 [2022-07-19 15:23:52,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224108943] [2022-07-19 15:23:52,773 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:52,773 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-07-19 15:23:52,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:52,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-07-19 15:23:52,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 15:23:52,774 INFO L87 Difference]: Start difference. First operand 697 states and 764 transitions. Second operand has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:53,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:23:53,978 INFO L93 Difference]: Finished difference Result 746 states and 815 transitions. [2022-07-19 15:23:53,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 15:23:53,979 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-19 15:23:53,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:23:53,980 INFO L225 Difference]: With dead ends: 746 [2022-07-19 15:23:53,980 INFO L226 Difference]: Without dead ends: 740 [2022-07-19 15:23:53,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 62 SyntacticMatches, 7 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=325, Invalid=3835, Unknown=0, NotChecked=0, Total=4160 [2022-07-19 15:23:53,981 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 95 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 597 SdHoareTripleChecker+Invalid, 685 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:23:53,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 597 Invalid, 685 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:23:53,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 740 states. [2022-07-19 15:23:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 740 to 711. [2022-07-19 15:23:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 711 states, 710 states have (on average 1.0985915492957747) internal successors, (780), 710 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 711 states to 711 states and 780 transitions. [2022-07-19 15:23:54,478 INFO L78 Accepts]: Start accepts. Automaton has 711 states and 780 transitions. Word has length 44 [2022-07-19 15:23:54,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:23:54,479 INFO L495 AbstractCegarLoop]: Abstraction has 711 states and 780 transitions. [2022-07-19 15:23:54,479 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.4651162790697674) internal successors, (63), 43 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:23:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 711 states and 780 transitions. [2022-07-19 15:23:54,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 15:23:54,480 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:23:54,480 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:23:54,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2022-07-19 15:23:54,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2022-07-19 15:23:54,680 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:23:54,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:23:54,681 INFO L85 PathProgramCache]: Analyzing trace with hash 627664406, now seen corresponding path program 87 times [2022-07-19 15:23:54,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:23:54,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359055982] [2022-07-19 15:23:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:23:54,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:23:54,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:23:55,016 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:23:55,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:23:55,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359055982] [2022-07-19 15:23:55,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359055982] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:23:55,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201399322] [2022-07-19 15:23:55,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:23:55,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:23:55,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:23:55,018 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:23:55,019 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2022-07-19 15:23:55,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-19 15:23:55,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:23:55,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 15:23:55,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:23:55,913 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:23:55,913 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:23:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:23:56,501 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201399322] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:23:56,501 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:23:56,501 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 64 [2022-07-19 15:23:56,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527493292] [2022-07-19 15:23:56,501 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:23:56,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-19 15:23:56,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:23:56,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-19 15:23:56,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=3855, Unknown=0, NotChecked=0, Total=4032 [2022-07-19 15:23:56,502 INFO L87 Difference]: Start difference. First operand 711 states and 780 transitions. Second operand has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:05,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:24:05,100 INFO L93 Difference]: Finished difference Result 1257 states and 1344 transitions. [2022-07-19 15:24:05,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-07-19 15:24:05,101 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-19 15:24:05,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:24:05,102 INFO L225 Difference]: With dead ends: 1257 [2022-07-19 15:24:05,102 INFO L226 Difference]: Without dead ends: 1207 [2022-07-19 15:24:05,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5917 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=5965, Invalid=23791, Unknown=0, NotChecked=0, Total=29756 [2022-07-19 15:24:05,104 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 3881 mSDsluCounter, 2647 mSDsCounter, 0 mSdLazyCounter, 1928 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3881 SdHoareTripleChecker+Valid, 2757 SdHoareTripleChecker+Invalid, 2121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1928 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 15:24:05,104 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3881 Valid, 2757 Invalid, 2121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 1928 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 15:24:05,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1207 states. [2022-07-19 15:24:05,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1207 to 778. [2022-07-19 15:24:05,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 777 states have (on average 1.0978120978120978) internal successors, (853), 777 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:05,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 853 transitions. [2022-07-19 15:24:05,660 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 853 transitions. Word has length 45 [2022-07-19 15:24:05,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:24:05,660 INFO L495 AbstractCegarLoop]: Abstraction has 778 states and 853 transitions. [2022-07-19 15:24:05,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:05,660 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 853 transitions. [2022-07-19 15:24:05,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 15:24:05,661 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:24:05,661 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:24:05,678 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2022-07-19 15:24:05,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:05,862 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:24:05,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:24:05,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1889550089, now seen corresponding path program 88 times [2022-07-19 15:24:05,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:24:05,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303077723] [2022-07-19 15:24:05,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:24:05,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:24:05,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:24:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:24:06,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:24:06,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303077723] [2022-07-19 15:24:06,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303077723] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:24:06,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512171689] [2022-07-19 15:24:06,200 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:24:06,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:06,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:24:06,201 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:24:06,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2022-07-19 15:24:06,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:24:06,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:24:06,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-19 15:24:06,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:24:07,111 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:24:07,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:24:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 15:24:07,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512171689] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:24:07,742 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:24:07,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 64 [2022-07-19 15:24:07,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945098526] [2022-07-19 15:24:07,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:24:07,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-07-19 15:24:07,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:24:07,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-07-19 15:24:07,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3856, Unknown=0, NotChecked=0, Total=4032 [2022-07-19 15:24:07,743 INFO L87 Difference]: Start difference. First operand 778 states and 853 transitions. Second operand has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:24:11,845 INFO L93 Difference]: Finished difference Result 1238 states and 1319 transitions. [2022-07-19 15:24:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 15:24:11,846 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-19 15:24:11,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:24:11,847 INFO L225 Difference]: With dead ends: 1238 [2022-07-19 15:24:11,847 INFO L226 Difference]: Without dead ends: 1213 [2022-07-19 15:24:11,848 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1164 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=747, Invalid=8565, Unknown=0, NotChecked=0, Total=9312 [2022-07-19 15:24:11,848 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 2728 mSDsluCounter, 7530 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2728 SdHoareTripleChecker+Valid, 7726 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:24:11,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2728 Valid, 7726 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 15:24:11,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2022-07-19 15:24:12,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 784. [2022-07-19 15:24:12,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.0970625798212006) internal successors, (859), 783 states have internal predecessors, (859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:12,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 859 transitions. [2022-07-19 15:24:12,419 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 859 transitions. Word has length 45 [2022-07-19 15:24:12,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:24:12,419 INFO L495 AbstractCegarLoop]: Abstraction has 784 states and 859 transitions. [2022-07-19 15:24:12,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.46875) internal successors, (94), 64 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:12,419 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 859 transitions. [2022-07-19 15:24:12,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 15:24:12,420 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:24:12,420 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:24:12,436 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2022-07-19 15:24:12,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:12,621 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:24:12,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:24:12,621 INFO L85 PathProgramCache]: Analyzing trace with hash 579713141, now seen corresponding path program 89 times [2022-07-19 15:24:12,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:24:12,621 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285488950] [2022-07-19 15:24:12,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:24:12,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:24:12,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:24:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 15:24:12,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:24:12,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285488950] [2022-07-19 15:24:12,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285488950] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:24:12,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379039217] [2022-07-19 15:24:12,704 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:24:12,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:12,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:24:12,705 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:24:12,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2022-07-19 15:24:12,747 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-19 15:24:12,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:24:12,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 15:24:12,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:24:12,852 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 15:24:12,852 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:24:12,881 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 15:24:12,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379039217] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:24:12,881 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:24:12,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2022-07-19 15:24:12,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495083287] [2022-07-19 15:24:12,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:24:12,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 15:24:12,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:24:12,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 15:24:12,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-07-19 15:24:12,882 INFO L87 Difference]: Start difference. First operand 784 states and 859 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:13,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:24:13,958 INFO L93 Difference]: Finished difference Result 897 states and 981 transitions. [2022-07-19 15:24:13,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 15:24:13,958 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-19 15:24:13,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:24:13,959 INFO L225 Difference]: With dead ends: 897 [2022-07-19 15:24:13,959 INFO L226 Difference]: Without dead ends: 880 [2022-07-19 15:24:13,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 15:24:13,960 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 223 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:24:13,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 366 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:24:13,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-07-19 15:24:14,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 824. [2022-07-19 15:24:14,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 823 states have (on average 1.1081409477521265) internal successors, (912), 823 states have internal predecessors, (912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:14,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 912 transitions. [2022-07-19 15:24:14,566 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 912 transitions. Word has length 45 [2022-07-19 15:24:14,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:24:14,566 INFO L495 AbstractCegarLoop]: Abstraction has 824 states and 912 transitions. [2022-07-19 15:24:14,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:14,566 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 912 transitions. [2022-07-19 15:24:14,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-19 15:24:14,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:24:14,568 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:24:14,584 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2022-07-19 15:24:14,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:14,771 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:24:14,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:24:14,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1406048364, now seen corresponding path program 90 times [2022-07-19 15:24:14,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:24:14,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053606254] [2022-07-19 15:24:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:24:14,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:24:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:24:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 15:24:14,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:24:14,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053606254] [2022-07-19 15:24:14,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053606254] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:24:14,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228392632] [2022-07-19 15:24:14,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:24:14,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:14,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:24:14,856 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:24:14,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2022-07-19 15:24:14,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 15:24:14,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:24:14,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 15 conjunts are in the unsatisfiable core [2022-07-19 15:24:14,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:24:15,001 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 15:24:15,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:24:15,031 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 15:24:15,031 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228392632] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:24:15,031 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:24:15,031 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 25 [2022-07-19 15:24:15,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840244333] [2022-07-19 15:24:15,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:24:15,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-19 15:24:15,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:24:15,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-19 15:24:15,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2022-07-19 15:24:15,032 INFO L87 Difference]: Start difference. First operand 824 states and 912 transitions. Second operand has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:16,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:24:16,443 INFO L93 Difference]: Finished difference Result 1384 states and 1555 transitions. [2022-07-19 15:24:16,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 15:24:16,443 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-19 15:24:16,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:24:16,445 INFO L225 Difference]: With dead ends: 1384 [2022-07-19 15:24:16,445 INFO L226 Difference]: Without dead ends: 1180 [2022-07-19 15:24:16,445 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=495, Invalid=1485, Unknown=0, NotChecked=0, Total=1980 [2022-07-19 15:24:16,445 INFO L413 NwaCegarLoop]: 101 mSDtfsCounter, 592 mSDsluCounter, 410 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 592 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 15:24:16,445 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [592 Valid, 511 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 15:24:16,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2022-07-19 15:24:17,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 934. [2022-07-19 15:24:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.1093247588424437) internal successors, (1035), 933 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:17,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1035 transitions. [2022-07-19 15:24:17,159 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1035 transitions. Word has length 45 [2022-07-19 15:24:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:24:17,159 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1035 transitions. [2022-07-19 15:24:17,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.88) internal successors, (47), 25 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1035 transitions. [2022-07-19 15:24:17,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 15:24:17,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:24:17,160 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:24:17,176 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2022-07-19 15:24:17,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:17,360 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:24:17,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:24:17,361 INFO L85 PathProgramCache]: Analyzing trace with hash -2078840465, now seen corresponding path program 91 times [2022-07-19 15:24:17,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:24:17,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663099743] [2022-07-19 15:24:17,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:24:17,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:24:17,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:24:17,921 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:24:17,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:24:17,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663099743] [2022-07-19 15:24:17,921 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663099743] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:24:17,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295927550] [2022-07-19 15:24:17,922 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:24:17,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:17,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:24:17,923 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:24:17,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2022-07-19 15:24:17,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:24:17,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-19 15:24:17,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:24:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:24:18,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:24:18,802 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-19 15:24:18,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295927550] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:24:18,802 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:24:18,802 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 56 [2022-07-19 15:24:18,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816711800] [2022-07-19 15:24:18,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:24:18,803 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-19 15:24:18,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:24:18,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-19 15:24:18,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2946, Unknown=0, NotChecked=0, Total=3080 [2022-07-19 15:24:18,804 INFO L87 Difference]: Start difference. First operand 934 states and 1035 transitions. Second operand has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:22,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:24:22,807 INFO L93 Difference]: Finished difference Result 1692 states and 1809 transitions. [2022-07-19 15:24:22,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-19 15:24:22,807 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-19 15:24:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:24:22,809 INFO L225 Difference]: With dead ends: 1692 [2022-07-19 15:24:22,809 INFO L226 Difference]: Without dead ends: 1683 [2022-07-19 15:24:22,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 67 SyntacticMatches, 5 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1471 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=397, Invalid=7793, Unknown=0, NotChecked=0, Total=8190 [2022-07-19 15:24:22,810 INFO L413 NwaCegarLoop]: 202 mSDtfsCounter, 346 mSDsluCounter, 6873 mSDsCounter, 0 mSdLazyCounter, 3020 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 7075 SdHoareTripleChecker+Invalid, 3074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 3020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 15:24:22,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [346 Valid, 7075 Invalid, 3074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 3020 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 15:24:22,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2022-07-19 15:24:23,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 943. [2022-07-19 15:24:23,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 1.1093418259023355) internal successors, (1045), 942 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:23,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1045 transitions. [2022-07-19 15:24:23,503 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1045 transitions. Word has length 46 [2022-07-19 15:24:23,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:24:23,503 INFO L495 AbstractCegarLoop]: Abstraction has 943 states and 1045 transitions. [2022-07-19 15:24:23,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3392857142857142) internal successors, (75), 56 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:23,504 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1045 transitions. [2022-07-19 15:24:23,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 15:24:23,504 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:24:23,504 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:24:23,520 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2022-07-19 15:24:23,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2022-07-19 15:24:23,705 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:24:23,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:24:23,705 INFO L85 PathProgramCache]: Analyzing trace with hash 2111321103, now seen corresponding path program 92 times [2022-07-19 15:24:23,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:24:23,705 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063584999] [2022-07-19 15:24:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:24:23,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:24:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:24:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:24:24,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:24:24,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063584999] [2022-07-19 15:24:24,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063584999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:24:24,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630640714] [2022-07-19 15:24:24,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 15:24:24,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:24,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:24:24,255 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:24:24,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2022-07-19 15:24:24,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 15:24:24,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:24:24,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-19 15:24:24,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:24:24,888 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:24:24,888 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:24:25,141 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 15:24:25,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630640714] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:24:25,142 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:24:25,142 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 54 [2022-07-19 15:24:25,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110932131] [2022-07-19 15:24:25,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:24:25,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-19 15:24:25,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:24:25,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-19 15:24:25,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2729, Unknown=0, NotChecked=0, Total=2862 [2022-07-19 15:24:25,143 INFO L87 Difference]: Start difference. First operand 943 states and 1045 transitions. Second operand has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:28,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:24:28,597 INFO L93 Difference]: Finished difference Result 1460 states and 1561 transitions. [2022-07-19 15:24:28,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-19 15:24:28,598 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-19 15:24:28,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:24:28,599 INFO L225 Difference]: With dead ends: 1460 [2022-07-19 15:24:28,599 INFO L226 Difference]: Without dead ends: 1430 [2022-07-19 15:24:28,600 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=367, Invalid=6943, Unknown=0, NotChecked=0, Total=7310 [2022-07-19 15:24:28,600 INFO L413 NwaCegarLoop]: 170 mSDtfsCounter, 263 mSDsluCounter, 5164 mSDsCounter, 0 mSdLazyCounter, 2406 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 5334 SdHoareTripleChecker+Invalid, 2457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 15:24:28,600 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 5334 Invalid, 2457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2406 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 15:24:28,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1430 states. [2022-07-19 15:24:29,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1430 to 934. [2022-07-19 15:24:29,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 934 states, 933 states have (on average 1.1093247588424437) internal successors, (1035), 933 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:29,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 934 states to 934 states and 1035 transitions. [2022-07-19 15:24:29,301 INFO L78 Accepts]: Start accepts. Automaton has 934 states and 1035 transitions. Word has length 46 [2022-07-19 15:24:29,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:24:29,301 INFO L495 AbstractCegarLoop]: Abstraction has 934 states and 1035 transitions. [2022-07-19 15:24:29,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3703703703703705) internal successors, (74), 54 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:29,301 INFO L276 IsEmpty]: Start isEmpty. Operand 934 states and 1035 transitions. [2022-07-19 15:24:29,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 15:24:29,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:24:29,302 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:24:29,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2022-07-19 15:24:29,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2022-07-19 15:24:29,502 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:24:29,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:24:29,502 INFO L85 PathProgramCache]: Analyzing trace with hash -1796342545, now seen corresponding path program 93 times [2022-07-19 15:24:29,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:24:29,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585935715] [2022-07-19 15:24:29,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:24:29,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:24:29,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:24:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:24:29,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:24:29,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585935715] [2022-07-19 15:24:29,942 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585935715] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:24:29,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222772176] [2022-07-19 15:24:29,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 15:24:29,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:29,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:24:29,943 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:24:29,944 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2022-07-19 15:24:29,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-19 15:24:29,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:24:29,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-19 15:24:29,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:24:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:24:30,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:24:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-19 15:24:30,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222772176] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:24:30,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:24:30,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 52 [2022-07-19 15:24:30,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931468842] [2022-07-19 15:24:30,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:24:30,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-19 15:24:30,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:24:30,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-19 15:24:30,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2520, Unknown=0, NotChecked=0, Total=2652 [2022-07-19 15:24:30,816 INFO L87 Difference]: Start difference. First operand 934 states and 1035 transitions. Second operand has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:33,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:24:33,880 INFO L93 Difference]: Finished difference Result 1285 states and 1385 transitions. [2022-07-19 15:24:33,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 15:24:33,881 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-19 15:24:33,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:24:33,883 INFO L225 Difference]: With dead ends: 1285 [2022-07-19 15:24:33,883 INFO L226 Difference]: Without dead ends: 1254 [2022-07-19 15:24:33,884 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=361, Invalid=6281, Unknown=0, NotChecked=0, Total=6642 [2022-07-19 15:24:33,884 INFO L413 NwaCegarLoop]: 136 mSDtfsCounter, 226 mSDsluCounter, 4239 mSDsCounter, 0 mSdLazyCounter, 2199 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 4375 SdHoareTripleChecker+Invalid, 2253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 15:24:33,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 4375 Invalid, 2253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2199 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 15:24:33,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-07-19 15:24:34,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 923. [2022-07-19 15:24:34,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 922 states have (on average 1.1095444685466378) internal successors, (1023), 922 states have internal predecessors, (1023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:34,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1023 transitions. [2022-07-19 15:24:34,628 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1023 transitions. Word has length 46 [2022-07-19 15:24:34,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:24:34,628 INFO L495 AbstractCegarLoop]: Abstraction has 923 states and 1023 transitions. [2022-07-19 15:24:34,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.3846153846153846) internal successors, (72), 52 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:34,629 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1023 transitions. [2022-07-19 15:24:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 15:24:34,629 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:24:34,629 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:24:34,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2022-07-19 15:24:34,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2022-07-19 15:24:34,830 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:24:34,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:24:34,830 INFO L85 PathProgramCache]: Analyzing trace with hash -479321969, now seen corresponding path program 94 times [2022-07-19 15:24:34,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:24:34,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708661552] [2022-07-19 15:24:34,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:24:34,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:24:34,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:24:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:24:35,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:24:35,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708661552] [2022-07-19 15:24:35,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708661552] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:24:35,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755507726] [2022-07-19 15:24:35,230 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 15:24:35,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:35,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:24:35,231 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:24:35,232 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2022-07-19 15:24:35,279 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 15:24:35,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:24:35,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-19 15:24:35,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:24:35,892 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:24:35,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:24:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-07-19 15:24:36,126 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755507726] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:24:36,126 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:24:36,126 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 50 [2022-07-19 15:24:36,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055602044] [2022-07-19 15:24:36,127 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:24:36,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-19 15:24:36,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:24:36,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-19 15:24:36,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2022-07-19 15:24:36,127 INFO L87 Difference]: Start difference. First operand 923 states and 1023 transitions. Second operand has 50 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:38,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:24:38,719 INFO L93 Difference]: Finished difference Result 1149 states and 1248 transitions. [2022-07-19 15:24:38,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-19 15:24:38,719 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-19 15:24:38,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:24:38,721 INFO L225 Difference]: With dead ends: 1149 [2022-07-19 15:24:38,721 INFO L226 Difference]: Without dead ends: 1117 [2022-07-19 15:24:38,721 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1115 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=355, Invalid=5651, Unknown=0, NotChecked=0, Total=6006 [2022-07-19 15:24:38,721 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 180 mSDsluCounter, 2895 mSDsCounter, 0 mSdLazyCounter, 1619 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 2997 SdHoareTripleChecker+Invalid, 1673 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1619 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 15:24:38,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [180 Valid, 2997 Invalid, 1673 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1619 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 15:24:38,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2022-07-19 15:24:39,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 910. [2022-07-19 15:24:39,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 910 states, 909 states have (on average 1.11001100110011) internal successors, (1009), 909 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:39,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 910 states to 910 states and 1009 transitions. [2022-07-19 15:24:39,387 INFO L78 Accepts]: Start accepts. Automaton has 910 states and 1009 transitions. Word has length 46 [2022-07-19 15:24:39,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:24:39,387 INFO L495 AbstractCegarLoop]: Abstraction has 910 states and 1009 transitions. [2022-07-19 15:24:39,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.4) internal successors, (70), 50 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:39,387 INFO L276 IsEmpty]: Start isEmpty. Operand 910 states and 1009 transitions. [2022-07-19 15:24:39,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 15:24:39,388 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:24:39,388 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:24:39,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2022-07-19 15:24:39,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2022-07-19 15:24:39,589 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:24:39,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:24:39,589 INFO L85 PathProgramCache]: Analyzing trace with hash -1560702865, now seen corresponding path program 95 times [2022-07-19 15:24:39,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:24:39,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810272668] [2022-07-19 15:24:39,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:24:39,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:24:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:24:39,938 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:24:39,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:24:39,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810272668] [2022-07-19 15:24:39,938 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810272668] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:24:39,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256223890] [2022-07-19 15:24:39,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 15:24:39,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:39,939 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:24:39,940 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:24:39,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2022-07-19 15:24:39,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2022-07-19 15:24:39,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:24:39,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-19 15:24:39,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:24:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:24:40,528 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:24:40,751 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-19 15:24:40,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256223890] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:24:40,751 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:24:40,751 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 48 [2022-07-19 15:24:40,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552723807] [2022-07-19 15:24:40,751 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:24:40,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-19 15:24:40,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:24:40,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-19 15:24:40,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2126, Unknown=0, NotChecked=0, Total=2256 [2022-07-19 15:24:40,752 INFO L87 Difference]: Start difference. First operand 910 states and 1009 transitions. Second operand has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:42,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:24:42,897 INFO L93 Difference]: Finished difference Result 1044 states and 1142 transitions. [2022-07-19 15:24:42,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-07-19 15:24:42,898 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 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 46 [2022-07-19 15:24:42,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:24:42,899 INFO L225 Difference]: With dead ends: 1044 [2022-07-19 15:24:42,899 INFO L226 Difference]: Without dead ends: 1011 [2022-07-19 15:24:42,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 65 SyntacticMatches, 7 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=349, Invalid=5053, Unknown=0, NotChecked=0, Total=5402 [2022-07-19 15:24:42,900 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 139 mSDsluCounter, 1766 mSDsCounter, 0 mSdLazyCounter, 1188 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 1834 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 1188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 15:24:42,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [139 Valid, 1834 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 1188 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 15:24:42,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2022-07-19 15:24:43,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 895. [2022-07-19 15:24:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 1.110738255033557) internal successors, (993), 894 states have internal predecessors, (993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 993 transitions. [2022-07-19 15:24:43,557 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 993 transitions. Word has length 46 [2022-07-19 15:24:43,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:24:43,557 INFO L495 AbstractCegarLoop]: Abstraction has 895 states and 993 transitions. [2022-07-19 15:24:43,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.4166666666666667) internal successors, (68), 48 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:43,557 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 993 transitions. [2022-07-19 15:24:43,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 15:24:43,558 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:24:43,558 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:24:43,574 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2022-07-19 15:24:43,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2022-07-19 15:24:43,758 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:24:43,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:24:43,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1236184286, now seen corresponding path program 96 times [2022-07-19 15:24:43,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:24:43,759 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811406889] [2022-07-19 15:24:43,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:24:43,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:24:43,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:24:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2022-07-19 15:24:43,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:24:43,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811406889] [2022-07-19 15:24:43,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811406889] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:24:43,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125837605] [2022-07-19 15:24:43,928 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 15:24:43,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:43,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:24:43,929 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:24:43,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2022-07-19 15:24:43,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-19 15:24:43,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 15:24:43,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-19 15:24:43,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:24:44,314 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 15:24:44,314 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:24:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2022-07-19 15:24:44,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125837605] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:24:44,562 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:24:44,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 40 [2022-07-19 15:24:44,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668404609] [2022-07-19 15:24:44,562 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:24:44,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-19 15:24:44,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:24:44,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-19 15:24:44,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1444, Unknown=0, NotChecked=0, Total=1560 [2022-07-19 15:24:44,563 INFO L87 Difference]: Start difference. First operand 895 states and 993 transitions. Second operand has 40 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:47,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 15:24:47,469 INFO L93 Difference]: Finished difference Result 1147 states and 1264 transitions. [2022-07-19 15:24:47,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-07-19 15:24:47,470 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2022-07-19 15:24:47,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 15:24:47,471 INFO L225 Difference]: With dead ends: 1147 [2022-07-19 15:24:47,471 INFO L226 Difference]: Without dead ends: 1075 [2022-07-19 15:24:47,471 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 67 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1516, Invalid=5624, Unknown=0, NotChecked=0, Total=7140 [2022-07-19 15:24:47,472 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 1506 mSDsluCounter, 1188 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 1264 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 15:24:47,472 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1506 Valid, 1264 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 15:24:47,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1075 states. [2022-07-19 15:24:48,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1075 to 986. [2022-07-19 15:24:48,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 1.099492385786802) internal successors, (1083), 985 states have internal predecessors, (1083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:48,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 1083 transitions. [2022-07-19 15:24:48,261 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 1083 transitions. Word has length 46 [2022-07-19 15:24:48,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 15:24:48,261 INFO L495 AbstractCegarLoop]: Abstraction has 986 states and 1083 transitions. [2022-07-19 15:24:48,261 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.55) internal successors, (62), 40 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 15:24:48,261 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 1083 transitions. [2022-07-19 15:24:48,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-07-19 15:24:48,262 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 15:24:48,262 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 15:24:48,278 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2022-07-19 15:24:48,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:48,463 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 15:24:48,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 15:24:48,463 INFO L85 PathProgramCache]: Analyzing trace with hash 833817871, now seen corresponding path program 97 times [2022-07-19 15:24:48,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 15:24:48,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110303602] [2022-07-19 15:24:48,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 15:24:48,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 15:24:48,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:24:48,774 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 15:24:48,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 15:24:48,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110303602] [2022-07-19 15:24:48,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110303602] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 15:24:48,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [655686409] [2022-07-19 15:24:48,774 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 15:24:48,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 15:24:48,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 15:24:48,775 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-19 15:24:48,776 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2022-07-19 15:24:48,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 15:24:48,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-19 15:24:48,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 15:24:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 15:24:49,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 15:24:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 15:24:49,591 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [655686409] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 15:24:49,591 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 15:24:49,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 46 [2022-07-19 15:24:49,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897696998] [2022-07-19 15:24:49,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 15:24:49,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 15:24:49,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 15:24:49,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 15:24:49,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2022-07-19 15:24:49,592 INFO L87 Difference]: Start difference. First operand 986 states and 1083 transitions. Second operand has 46 states, 46 states have (on average 1.434782608695652) internal successors, (66), 46 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)