./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive/MultCommutative-2.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/recursive/MultCommutative-2.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 ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 17:26:52,245 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 17:26:52,247 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 17:26:52,264 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 17:26:52,265 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 17:26:52,265 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 17:26:52,266 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 17:26:52,267 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 17:26:52,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 17:26:52,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 17:26:52,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 17:26:52,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 17:26:52,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 17:26:52,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 17:26:52,272 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 17:26:52,273 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 17:26:52,274 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 17:26:52,274 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 17:26:52,276 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 17:26:52,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 17:26:52,278 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 17:26:52,279 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 17:26:52,279 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 17:26:52,280 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 17:26:52,281 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 17:26:52,282 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 17:26:52,283 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 17:26:52,283 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 17:26:52,284 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 17:26:52,284 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 17:26:52,285 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 17:26:52,285 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 17:26:52,285 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 17:26:52,286 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 17:26:52,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 17:26:52,287 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 17:26:52,287 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 17:26:52,288 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 17:26:52,288 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 17:26:52,288 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 17:26:52,289 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 17:26:52,289 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 17:26:52,290 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 17:26:52,304 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 17:26:52,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 17:26:52,304 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 17:26:52,305 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 17:26:52,305 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 17:26:52,305 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 17:26:52,306 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 17:26:52,306 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 17:26:52,306 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 17:26:52,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 17:26:52,306 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 17:26:52,307 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 17:26:52,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 17:26:52,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 17:26:52,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 17:26:52,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 17:26:52,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 17:26:52,308 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 17:26:52,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 17:26:52,308 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 17:26:52,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 17:26:52,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 17:26:52,308 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 17:26:52,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 17:26:52,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:26:52,309 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 17:26:52,309 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 17:26:52,309 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 17:26:52,309 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 17:26:52,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 17:26:52,310 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 17:26:52,310 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 17:26:52,310 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 17:26:52,310 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ce29b37e076ab683230ebf17073db3b7759ea39570dd2ef64322b6d43bb636cd [2022-07-19 17:26:52,515 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 17:26:52,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 17:26:52,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 17:26:52,550 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 17:26:52,551 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 17:26:52,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive/MultCommutative-2.c [2022-07-19 17:26:52,626 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f6a013b9/81a348e6dca6473f884e239191d0ab90/FLAG1cb192652 [2022-07-19 17:26:53,121 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 17:26:53,123 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive/MultCommutative-2.c [2022-07-19 17:26:53,130 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f6a013b9/81a348e6dca6473f884e239191d0ab90/FLAG1cb192652 [2022-07-19 17:26:53,522 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f6a013b9/81a348e6dca6473f884e239191d0ab90 [2022-07-19 17:26:53,524 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 17:26:53,525 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 17:26:53,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 17:26:53,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 17:26:53,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 17:26:53,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:26:53" (1/1) ... [2022-07-19 17:26:53,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bab5d0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:53, skipping insertion in model container [2022-07-19 17:26:53,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 05:26:53" (1/1) ... [2022-07-19 17:26:53,540 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 17:26:53,550 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 17:26:53,747 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/recursive/MultCommutative-2.c[970,983] [2022-07-19 17:26:53,750 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:26:53,755 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 17:26:53,773 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/recursive/MultCommutative-2.c[970,983] [2022-07-19 17:26:53,774 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 17:26:53,788 INFO L208 MainTranslator]: Completed translation [2022-07-19 17:26:53,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:53 WrapperNode [2022-07-19 17:26:53,789 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 17:26:53,803 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 17:26:53,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 17:26:53,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 17:26:53,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:53" (1/1) ... [2022-07-19 17:26:53,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:53" (1/1) ... [2022-07-19 17:26:53,835 INFO L137 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 36 [2022-07-19 17:26:53,835 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 17:26:53,835 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 17:26:53,835 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 17:26:53,836 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 17:26:53,845 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:53" (1/1) ... [2022-07-19 17:26:53,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:53" (1/1) ... [2022-07-19 17:26:53,854 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:53" (1/1) ... [2022-07-19 17:26:53,854 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:53" (1/1) ... [2022-07-19 17:26:53,856 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:53" (1/1) ... [2022-07-19 17:26:53,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:53" (1/1) ... [2022-07-19 17:26:53,863 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:53" (1/1) ... [2022-07-19 17:26:53,867 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 17:26:53,868 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 17:26:53,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 17:26:53,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 17:26:53,870 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:53" (1/1) ... [2022-07-19 17:26:53,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 17:26:53,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:26:53,899 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 17:26:53,920 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 17:26:53,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 17:26:53,940 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2022-07-19 17:26:53,940 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2022-07-19 17:26:53,941 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 17:26:53,941 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 17:26:53,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 17:26:53,994 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 17:26:53,995 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 17:26:54,181 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 17:26:54,186 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 17:26:54,186 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-07-19 17:26:54,188 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:26:54 BoogieIcfgContainer [2022-07-19 17:26:54,188 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 17:26:54,200 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 17:26:54,201 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 17:26:54,203 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 17:26:54,204 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 05:26:53" (1/3) ... [2022-07-19 17:26:54,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d89ac76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:26:54, skipping insertion in model container [2022-07-19 17:26:54,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 05:26:53" (2/3) ... [2022-07-19 17:26:54,205 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d89ac76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 05:26:54, skipping insertion in model container [2022-07-19 17:26:54,205 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 05:26:54" (3/3) ... [2022-07-19 17:26:54,206 INFO L111 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2022-07-19 17:26:54,216 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 17:26:54,216 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 17:26:54,275 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 17:26:54,304 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@5555cf0d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@264fcec4 [2022-07-19 17:26:54,304 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 17:26:54,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-19 17:26:54,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-19 17:26:54,318 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:54,319 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:54,319 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:54,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1513944532, now seen corresponding path program 1 times [2022-07-19 17:26:54,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:54,366 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126227936] [2022-07-19 17:26:54,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:54,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:54,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:54,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:54,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:54,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:26:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-07-19 17:26:54,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:54,746 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126227936] [2022-07-19 17:26:54,746 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126227936] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:26:54,747 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:26:54,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-19 17:26:54,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576325399] [2022-07-19 17:26:54,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:26:54,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-19 17:26:54,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:54,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-19 17:26:54,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-07-19 17:26:54,783 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 17:26:54,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:54,927 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2022-07-19 17:26:54,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 17:26:54,934 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2022-07-19 17:26:54,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:54,958 INFO L225 Difference]: With dead ends: 44 [2022-07-19 17:26:54,958 INFO L226 Difference]: Without dead ends: 28 [2022-07-19 17:26:54,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2022-07-19 17:26:54,967 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 12 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:54,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 151 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-19 17:26:54,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-07-19 17:26:55,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2022-07-19 17:26:55,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2022-07-19 17:26:55,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 32 transitions. [2022-07-19 17:26:55,017 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 32 transitions. Word has length 20 [2022-07-19 17:26:55,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:55,018 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 32 transitions. [2022-07-19 17:26:55,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-19 17:26:55,019 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 32 transitions. [2022-07-19 17:26:55,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-19 17:26:55,021 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:55,021 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] [2022-07-19 17:26:55,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 17:26:55,025 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:55,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:55,028 INFO L85 PathProgramCache]: Analyzing trace with hash 555960324, now seen corresponding path program 1 times [2022-07-19 17:26:55,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:55,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322805238] [2022-07-19 17:26:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:55,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:55,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:55,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-07-19 17:26:55,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:55,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:26:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:55,297 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-19 17:26:55,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:55,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322805238] [2022-07-19 17:26:55,298 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322805238] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:26:55,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306451296] [2022-07-19 17:26:55,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:55,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:26:55,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:26:55,305 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 17:26:55,325 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 17:26:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:55,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2022-07-19 17:26:55,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:26:55,480 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 17:26:55,480 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:26:55,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 17:26:55,584 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306451296] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:26:55,584 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:26:55,584 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5, 5] total 13 [2022-07-19 17:26:55,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378808420] [2022-07-19 17:26:55,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:26:55,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-19 17:26:55,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:55,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-19 17:26:55,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-07-19 17:26:55,586 INFO L87 Difference]: Start difference. First operand 24 states and 32 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 17:26:55,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:55,852 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2022-07-19 17:26:55,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-19 17:26:55,855 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 26 [2022-07-19 17:26:55,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:55,855 INFO L225 Difference]: With dead ends: 52 [2022-07-19 17:26:55,856 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 17:26:55,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2022-07-19 17:26:55,857 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:55,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 113 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 17:26:55,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 17:26:55,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2022-07-19 17:26:55,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 17:26:55,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2022-07-19 17:26:55,865 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 26 [2022-07-19 17:26:55,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:55,866 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2022-07-19 17:26:55,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 4 states have call successors, (5), 1 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2022-07-19 17:26:55,866 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2022-07-19 17:26:55,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-19 17:26:55,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:55,867 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] [2022-07-19 17:26:55,894 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 17:26:56,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:26:56,068 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:56,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:56,069 INFO L85 PathProgramCache]: Analyzing trace with hash 2011031750, now seen corresponding path program 1 times [2022-07-19 17:26:56,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:56,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138780430] [2022-07-19 17:26:56,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:56,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:56,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 17:26:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-07-19 17:26:56,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:56,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138780430] [2022-07-19 17:26:56,179 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138780430] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 17:26:56,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 17:26:56,180 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-19 17:26:56,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576642103] [2022-07-19 17:26:56,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 17:26:56,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-19 17:26:56,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:56,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-19 17:26:56,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 17:26:56,184 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 17:26:56,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:56,410 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2022-07-19 17:26:56,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-19 17:26:56,410 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 27 [2022-07-19 17:26:56,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:56,411 INFO L225 Difference]: With dead ends: 31 [2022-07-19 17:26:56,411 INFO L226 Difference]: Without dead ends: 27 [2022-07-19 17:26:56,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-07-19 17:26:56,412 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:56,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 43 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 17:26:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-19 17:26:56,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-07-19 17:26:56,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 20 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 17:26:56,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-07-19 17:26:56,417 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 27 [2022-07-19 17:26:56,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:56,417 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-07-19 17:26:56,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-07-19 17:26:56,417 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-07-19 17:26:56,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-07-19 17:26:56,418 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:56,418 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:56,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 17:26:56,418 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:56,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:56,419 INFO L85 PathProgramCache]: Analyzing trace with hash -760266050, now seen corresponding path program 2 times [2022-07-19 17:26:56,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:56,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599819901] [2022-07-19 17:26:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:56,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:56,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 17:26:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:56,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:56,817 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 17:26:56,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:56,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599819901] [2022-07-19 17:26:56,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599819901] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:26:56,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110469721] [2022-07-19 17:26:56,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:26:56,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:26:56,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:26:56,822 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 17:26:56,823 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 17:26:56,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:26:56,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:26:56,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 41 conjunts are in the unsatisfiable core [2022-07-19 17:26:56,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:26:57,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-19 17:26:57,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:26:58,564 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 17:26:58,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110469721] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:26:58,565 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:26:58,565 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 14] total 35 [2022-07-19 17:26:58,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685486104] [2022-07-19 17:26:58,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:26:58,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-19 17:26:58,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:58,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-19 17:26:58,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1059, Unknown=0, NotChecked=0, Total=1190 [2022-07-19 17:26:58,571 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-19 17:26:58,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:58,936 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2022-07-19 17:26:58,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 17:26:58,937 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) Word has length 34 [2022-07-19 17:26:58,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:58,938 INFO L225 Difference]: With dead ends: 40 [2022-07-19 17:26:58,938 INFO L226 Difference]: Without dead ends: 36 [2022-07-19 17:26:58,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=235, Invalid=1571, Unknown=0, NotChecked=0, Total=1806 [2022-07-19 17:26:58,939 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:58,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 188 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-19 17:26:58,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-07-19 17:26:58,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-07-19 17:26:58,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 23 states have internal predecessors, (23), 5 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (14), 7 states have call predecessors, (14), 5 states have call successors, (14) [2022-07-19 17:26:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2022-07-19 17:26:58,951 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 34 [2022-07-19 17:26:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:58,951 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2022-07-19 17:26:58,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 1.5625) internal successors, (50), 24 states have internal predecessors, (50), 8 states have call successors, (8), 1 states have call predecessors, (8), 8 states have return successors, (11), 11 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-19 17:26:58,955 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2022-07-19 17:26:58,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-19 17:26:58,957 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:58,957 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:58,977 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 17:26:59,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-19 17:26:59,175 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:59,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:59,175 INFO L85 PathProgramCache]: Analyzing trace with hash -757286924, now seen corresponding path program 1 times [2022-07-19 17:26:59,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:59,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472829329] [2022-07-19 17:26:59,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:59,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:59,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:59,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:59,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:59,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 17:26:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:59,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:59,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-19 17:26:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:59,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:59,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 17:26:59,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:26:59,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472829329] [2022-07-19 17:26:59,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472829329] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:26:59,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594907721] [2022-07-19 17:26:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:59,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:26:59,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:26:59,259 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 17:26:59,260 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 17:26:59,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:59,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-19 17:26:59,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:26:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-19 17:26:59,325 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:26:59,458 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-19 17:26:59,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594907721] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:26:59,459 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:26:59,459 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2022-07-19 17:26:59,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348810452] [2022-07-19 17:26:59,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:26:59,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-19 17:26:59,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:26:59,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-19 17:26:59,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2022-07-19 17:26:59,460 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-19 17:26:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:26:59,515 INFO L93 Difference]: Finished difference Result 54 states and 77 transitions. [2022-07-19 17:26:59,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-19 17:26:59,516 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) Word has length 47 [2022-07-19 17:26:59,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:26:59,516 INFO L225 Difference]: With dead ends: 54 [2022-07-19 17:26:59,517 INFO L226 Difference]: Without dead ends: 25 [2022-07-19 17:26:59,517 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 98 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2022-07-19 17:26:59,518 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 22 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:26:59,518 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 78 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-19 17:26:59,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-07-19 17:26:59,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-07-19 17:26:59,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2022-07-19 17:26:59,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-07-19 17:26:59,522 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 47 [2022-07-19 17:26:59,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:26:59,522 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-07-19 17:26:59,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 3.5) internal successors, (35), 12 states have internal predecessors, (35), 6 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (9), 5 states have call predecessors, (9), 6 states have call successors, (9) [2022-07-19 17:26:59,522 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-07-19 17:26:59,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-19 17:26:59,523 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:26:59,523 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:26:59,543 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 17:26:59,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:26:59,741 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:26:59,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:26:59,741 INFO L85 PathProgramCache]: Analyzing trace with hash -983670890, now seen corresponding path program 3 times [2022-07-19 17:26:59,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:26:59,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936307145] [2022-07-19 17:26:59,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:26:59,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:26:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:59,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:26:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:59,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:59,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:59,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 17:26:59,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:26:59,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:26:59,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:00,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:00,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2022-07-19 17:27:00,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:27:00,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936307145] [2022-07-19 17:27:00,310 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936307145] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:27:00,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342651636] [2022-07-19 17:27:00,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 17:27:00,310 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:00,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:27:00,312 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 17:27:00,313 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 17:27:00,346 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-19 17:27:00,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:27:00,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 57 conjunts are in the unsatisfiable core [2022-07-19 17:27:00,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:27:01,042 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 26 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 17:27:01,042 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:27:02,774 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-07-19 17:27:02,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342651636] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:27:02,775 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:27:02,775 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 20] total 49 [2022-07-19 17:27:02,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675729049] [2022-07-19 17:27:02,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:27:02,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-19 17:27:02,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:27:02,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-19 17:27:02,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2022-07-19 17:27:02,779 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 49 states, 45 states have (on average 1.511111111111111) internal successors, (68), 34 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (15), 15 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-19 17:27:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:27:03,985 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-07-19 17:27:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-19 17:27:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 45 states have (on average 1.511111111111111) internal successors, (68), 34 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (15), 15 states have call predecessors, (15), 10 states have call successors, (15) Word has length 41 [2022-07-19 17:27:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:27:03,988 INFO L225 Difference]: With dead ends: 58 [2022-07-19 17:27:03,988 INFO L226 Difference]: Without dead ends: 52 [2022-07-19 17:27:03,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=469, Invalid=3821, Unknown=0, NotChecked=0, Total=4290 [2022-07-19 17:27:03,990 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 31 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 966 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 17:27:03,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 403 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 966 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 17:27:03,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-07-19 17:27:03,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2022-07-19 17:27:03,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 28 states have internal predecessors, (29), 6 states have call successors, (6), 2 states have call predecessors, (6), 6 states have return successors, (17), 9 states have call predecessors, (17), 6 states have call successors, (17) [2022-07-19 17:27:03,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2022-07-19 17:27:03,998 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 41 [2022-07-19 17:27:03,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:27:03,999 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2022-07-19 17:27:03,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 45 states have (on average 1.511111111111111) internal successors, (68), 34 states have internal predecessors, (68), 10 states have call successors, (10), 1 states have call predecessors, (10), 13 states have return successors, (15), 15 states have call predecessors, (15), 10 states have call successors, (15) [2022-07-19 17:27:03,999 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2022-07-19 17:27:04,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 17:27:04,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:27:04,000 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:27:04,019 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 17:27:04,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:04,214 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:27:04,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:27:04,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1241549144, now seen corresponding path program 4 times [2022-07-19 17:27:04,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:27:04,215 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497861505] [2022-07-19 17:27:04,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:27:04,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:27:04,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:04,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:27:04,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:04,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:04,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:04,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 17:27:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:04,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:04,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:04,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:04,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:04,611 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 16 proven. 68 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2022-07-19 17:27:04,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:27:04,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497861505] [2022-07-19 17:27:04,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497861505] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:27:04,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354615947] [2022-07-19 17:27:04,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 17:27:04,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:04,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:27:04,613 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 17:27:04,614 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 17:27:04,652 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 17:27:04,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:27:04,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 85 conjunts are in the unsatisfiable core [2022-07-19 17:27:04,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:27:05,096 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2022-07-19 17:27:05,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:27:08,570 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| Int) (v_mult_~n_BEFORE_CALL_20 Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_20_66| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111| Int)) (let ((.cse4 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| 3))) (let ((.cse3 (div (+ (* 2 v_mult_~n_BEFORE_CALL_20) (* 2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153|) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| (- 6))) (- 3))) (.cse2 (+ .cse4 |c_mult_#res|)) (.cse1 (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111| 3)) (.cse0 (div (+ (* (- 2) v_mult_~n_BEFORE_CALL_20) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| 6) (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153|)) 3))) (or (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| 0) (<= .cse0 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111|) (<= (+ 3 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| .cse1) .cse2) (< .cse3 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153|) (< .cse4 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| (* |aux_div_v_mult_#in~n_BEFORE_CALL_20_66| 3))) (< .cse0 .cse3) (< .cse2 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_111_153| .cse1)) (< |aux_div_v_mult_#in~n_BEFORE_CALL_20_66| .cse0))))) (<= |c_mult_#in~m| 0) (forall ((v_mult_~n_BEFORE_CALL_20 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_20_66| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| Int)) (let ((.cse5 (div (+ (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143|) (* (- 2) v_mult_~n_BEFORE_CALL_20) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| 6)) 3)) (.cse6 (div (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| (- 6)) (* 2 v_mult_~n_BEFORE_CALL_20) (* 2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143|)) (- 3))) (.cse8 (+ (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139| 3) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143|)) (.cse7 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| 3))) (or (< |aux_div_v_mult_#in~n_BEFORE_CALL_20_66| .cse5) (<= |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139| .cse6) (<= (+ .cse7 3 |c_mult_#res|) .cse8) (< .cse6 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143|) (< .cse7 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| (* |aux_div_v_mult_#in~n_BEFORE_CALL_20_66| 3))) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_20_66_139_143| 0) (< .cse5 .cse6) (< .cse8 (+ .cse7 |c_mult_#res|))))) (not (< |c_mult_#in~m| 0))) is different from false [2022-07-19 17:27:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 20 proven. 70 refuted. 0 times theorem prover too weak. 23 trivial. 12 not checked. [2022-07-19 17:27:08,981 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354615947] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:27:08,982 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:27:08,982 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 16, 25] total 51 [2022-07-19 17:27:08,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092587398] [2022-07-19 17:27:08,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:27:08,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-19 17:27:08,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:27:08,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-19 17:27:08,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2269, Unknown=1, NotChecked=96, Total=2550 [2022-07-19 17:27:08,992 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand has 51 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-19 17:27:10,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:27:10,378 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2022-07-19 17:27:10,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 17:27:10,379 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) Word has length 55 [2022-07-19 17:27:10,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:27:10,380 INFO L225 Difference]: With dead ends: 66 [2022-07-19 17:27:10,380 INFO L226 Difference]: Without dead ends: 58 [2022-07-19 17:27:10,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 88 SyntacticMatches, 7 SemanticMatches, 68 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1083 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=437, Invalid=4258, Unknown=1, NotChecked=134, Total=4830 [2022-07-19 17:27:10,382 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1133 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 1283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 1133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 17:27:10,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 337 Invalid, 1283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 1133 Invalid, 0 Unknown, 42 Unchecked, 0.7s Time] [2022-07-19 17:27:10,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-19 17:27:10,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 50. [2022-07-19 17:27:10,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (21), 11 states have call predecessors, (21), 7 states have call successors, (21) [2022-07-19 17:27:10,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 65 transitions. [2022-07-19 17:27:10,392 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 65 transitions. Word has length 55 [2022-07-19 17:27:10,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:27:10,392 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 65 transitions. [2022-07-19 17:27:10,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 1.4680851063829787) internal successors, (69), 33 states have internal predecessors, (69), 11 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (19), 18 states have call predecessors, (19), 11 states have call successors, (19) [2022-07-19 17:27:10,393 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 65 transitions. [2022-07-19 17:27:10,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-07-19 17:27:10,393 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:27:10,393 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:27:10,410 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-07-19 17:27:10,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:10,596 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:27:10,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:27:10,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1278690222, now seen corresponding path program 5 times [2022-07-19 17:27:10,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:27:10,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563643653] [2022-07-19 17:27:10,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:27:10,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:27:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:10,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:27:10,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:10,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:10,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:10,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:10,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:10,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 17:27:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:10,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:10,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 6 proven. 52 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2022-07-19 17:27:10,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:27:10,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563643653] [2022-07-19 17:27:10,947 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563643653] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:27:10,948 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124492976] [2022-07-19 17:27:10,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 17:27:10,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:10,948 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:27:10,964 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 17:27:10,986 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 17:27:11,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-19 17:27:11,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:27:11,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-19 17:27:11,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:27:11,502 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 1 proven. 53 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-07-19 17:27:11,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:27:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-07-19 17:27:12,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124492976] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:27:12,608 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:27:12,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 23] total 53 [2022-07-19 17:27:12,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625094409] [2022-07-19 17:27:12,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:27:12,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-19 17:27:12,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:27:12,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-19 17:27:12,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=2533, Unknown=0, NotChecked=0, Total=2756 [2022-07-19 17:27:12,624 INFO L87 Difference]: Start difference. First operand 50 states and 65 transitions. Second operand has 53 states, 49 states have (on average 1.469387755102041) internal successors, (72), 35 states have internal predecessors, (72), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (18), 18 states have call predecessors, (18), 10 states have call successors, (18) [2022-07-19 17:27:13,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:27:13,900 INFO L93 Difference]: Finished difference Result 72 states and 93 transitions. [2022-07-19 17:27:13,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-19 17:27:13,900 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 49 states have (on average 1.469387755102041) internal successors, (72), 35 states have internal predecessors, (72), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (18), 18 states have call predecessors, (18), 10 states have call successors, (18) Word has length 48 [2022-07-19 17:27:13,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:27:13,902 INFO L225 Difference]: With dead ends: 72 [2022-07-19 17:27:13,902 INFO L226 Difference]: Without dead ends: 64 [2022-07-19 17:27:13,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1403 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=491, Invalid=4621, Unknown=0, NotChecked=0, Total=5112 [2022-07-19 17:27:13,910 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 816 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 17:27:13,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 259 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 816 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 17:27:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-07-19 17:27:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2022-07-19 17:27:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 7 states have call successors, (7), 3 states have call predecessors, (7), 8 states have return successors, (20), 11 states have call predecessors, (20), 7 states have call successors, (20) [2022-07-19 17:27:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 64 transitions. [2022-07-19 17:27:13,921 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 64 transitions. Word has length 48 [2022-07-19 17:27:13,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:27:13,921 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 64 transitions. [2022-07-19 17:27:13,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 49 states have (on average 1.469387755102041) internal successors, (72), 35 states have internal predecessors, (72), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (18), 18 states have call predecessors, (18), 10 states have call successors, (18) [2022-07-19 17:27:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 64 transitions. [2022-07-19 17:27:13,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 17:27:13,922 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:27:13,923 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:27:13,942 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 17:27:14,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:14,140 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:27:14,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:27:14,140 INFO L85 PathProgramCache]: Analyzing trace with hash 230391048, now seen corresponding path program 6 times [2022-07-19 17:27:14,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:27:14,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110719062] [2022-07-19 17:27:14,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:27:14,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:27:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:14,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:27:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:14,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:14,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:14,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 17:27:14,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:14,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:14,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:14,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:14,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:14,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:14,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:14,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:14,864 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-19 17:27:14,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:27:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110719062] [2022-07-19 17:27:14,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110719062] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:27:14,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39809918] [2022-07-19 17:27:14,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 17:27:14,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:14,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:27:14,866 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 17:27:14,922 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 17:27:14,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-19 17:27:14,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:27:14,957 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-19 17:27:14,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:27:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 5 proven. 108 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-07-19 17:27:15,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:27:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 17:27:18,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39809918] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:27:18,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:27:18,522 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 20, 30] total 62 [2022-07-19 17:27:18,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405444714] [2022-07-19 17:27:18,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:27:18,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-07-19 17:27:18,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:27:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-07-19 17:27:18,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3556, Unknown=0, NotChecked=0, Total=3782 [2022-07-19 17:27:18,524 INFO L87 Difference]: Start difference. First operand 50 states and 64 transitions. Second operand has 62 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 38 states have internal predecessors, (83), 13 states have call successors, (13), 1 states have call predecessors, (13), 17 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2022-07-19 17:27:20,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:27:20,359 INFO L93 Difference]: Finished difference Result 84 states and 113 transitions. [2022-07-19 17:27:20,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 17:27:20,359 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 38 states have internal predecessors, (83), 13 states have call successors, (13), 1 states have call predecessors, (13), 17 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) Word has length 69 [2022-07-19 17:27:20,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:27:20,363 INFO L225 Difference]: With dead ends: 84 [2022-07-19 17:27:20,363 INFO L226 Difference]: Without dead ends: 76 [2022-07-19 17:27:20,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 110 SyntacticMatches, 10 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=587, Invalid=6553, Unknown=0, NotChecked=0, Total=7140 [2022-07-19 17:27:20,366 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 30 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1816 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1816 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 17:27:20,366 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 617 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1816 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 17:27:20,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-19 17:27:20,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2022-07-19 17:27:20,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 47 states have internal predecessors, (50), 9 states have call successors, (9), 4 states have call predecessors, (9), 12 states have return successors, (33), 16 states have call predecessors, (33), 9 states have call successors, (33) [2022-07-19 17:27:20,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 92 transitions. [2022-07-19 17:27:20,375 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 92 transitions. Word has length 69 [2022-07-19 17:27:20,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:27:20,376 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 92 transitions. [2022-07-19 17:27:20,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 58 states have (on average 1.4310344827586208) internal successors, (83), 38 states have internal predecessors, (83), 13 states have call successors, (13), 1 states have call predecessors, (13), 17 states have return successors, (25), 24 states have call predecessors, (25), 13 states have call successors, (25) [2022-07-19 17:27:20,376 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 92 transitions. [2022-07-19 17:27:20,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-07-19 17:27:20,379 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:27:20,379 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:27:20,403 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-07-19 17:27:20,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:20,599 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:27:20,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:27:20,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1792410124, now seen corresponding path program 7 times [2022-07-19 17:27:20,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:27:20,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930601999] [2022-07-19 17:27:20,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:27:20,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:27:20,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:20,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:27:20,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:20,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:20,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:20,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:20,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 17:27:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:20,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:20,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:21,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:21,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:21,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:21,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:21,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:21,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:21,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:21,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:21,387 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 28 proven. 146 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2022-07-19 17:27:21,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:27:21,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930601999] [2022-07-19 17:27:21,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930601999] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:27:21,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192711867] [2022-07-19 17:27:21,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 17:27:21,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:21,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:27:21,389 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 17:27:21,390 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 17:27:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:21,440 WARN L261 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 121 conjunts are in the unsatisfiable core [2022-07-19 17:27:21,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:27:22,215 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 6 proven. 136 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2022-07-19 17:27:22,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:27:26,980 WARN L833 $PredicateComparison]: unable to prove that (and (<= |c_mult_#in~m| 0) (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_58_112| Int) (v_mult_~n_BEFORE_CALL_58 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| Int)) (let ((.cse0 (div (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| (- 12)) (* |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| 2) (* 2 v_mult_~n_BEFORE_CALL_58)) (- 6))) (.cse2 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| 6)) (.cse1 (+ |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| (* 6 |aux_div_v_mult_#in~n_BEFORE_CALL_58_112|))) (.cse3 (div (+ (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| 12) (* (- 2) v_mult_~n_BEFORE_CALL_58) (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143|)) 6))) (or (< .cse0 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143|) (<= |aux_div_v_mult_#in~n_BEFORE_CALL_58_112| .cse0) (< .cse1 (+ .cse2 |c_mult_#res|)) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143| 0) (< .cse2 (+ (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133| 6) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133_143|)) (< .cse3 .cse0) (<= (+ .cse2 6 |c_mult_#res|) .cse1) (< |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_112_133| .cse3)))) (not (< |c_mult_#in~m| 0)) (forall ((|aux_div_v_mult_#in~n_BEFORE_CALL_58_78| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121| Int) (v_mult_~n_BEFORE_CALL_58 Int) (|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| Int)) (let ((.cse4 (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| 6))) (let ((.cse6 (+ .cse4 |c_mult_#res|)) (.cse5 (* |aux_div_v_mult_#in~n_BEFORE_CALL_58_78| 6)) (.cse7 (div (+ (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|) (* (- 2) v_mult_~n_BEFORE_CALL_58) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| 12)) 6)) (.cse8 (div (+ (* 2 v_mult_~n_BEFORE_CALL_58) (* 2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|) (* |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| (- 12))) (- 6)))) (or (< .cse4 (+ (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121| 6) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|)) (<= (+ .cse5 6 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|) .cse6) (< .cse6 (+ .cse5 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|)) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141| 0) (< .cse7 .cse8) (< |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121| .cse7) (<= .cse7 |aux_div_v_mult_#in~n_BEFORE_CALL_58_78|) (< .cse8 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_58_78_121_141|)))))) is different from false [2022-07-19 17:27:27,314 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 29 proven. 187 refuted. 0 times theorem prover too weak. 47 trivial. 18 not checked. [2022-07-19 17:27:27,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192711867] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:27:27,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:27:27,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 22, 34] total 69 [2022-07-19 17:27:27,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363404972] [2022-07-19 17:27:27,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:27:27,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-19 17:27:27,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:27:27,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-19 17:27:27,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=4309, Unknown=1, NotChecked=132, Total=4692 [2022-07-19 17:27:27,317 INFO L87 Difference]: Start difference. First operand 68 states and 92 transitions. Second operand has 69 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 42 states have internal predecessors, (93), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2022-07-19 17:27:29,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:27:29,179 INFO L93 Difference]: Finished difference Result 88 states and 116 transitions. [2022-07-19 17:27:29,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-19 17:27:29,179 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 42 states have internal predecessors, (93), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) Word has length 76 [2022-07-19 17:27:29,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:27:29,180 INFO L225 Difference]: With dead ends: 88 [2022-07-19 17:27:29,180 INFO L226 Difference]: Without dead ends: 82 [2022-07-19 17:27:29,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 121 SyntacticMatches, 10 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1932 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=653, Invalid=7540, Unknown=1, NotChecked=178, Total=8372 [2022-07-19 17:27:29,182 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 32 mSDsluCounter, 554 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 1853 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:27:29,182 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 575 Invalid, 1853 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 1750 Invalid, 0 Unknown, 56 Unchecked, 1.0s Time] [2022-07-19 17:27:29,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-19 17:27:29,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 74. [2022-07-19 17:27:29,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 9 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (36), 18 states have call predecessors, (36), 9 states have call successors, (36) [2022-07-19 17:27:29,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2022-07-19 17:27:29,189 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 76 [2022-07-19 17:27:29,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:27:29,189 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2022-07-19 17:27:29,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 65 states have (on average 1.4307692307692308) internal successors, (93), 42 states have internal predecessors, (93), 14 states have call successors, (14), 1 states have call predecessors, (14), 20 states have return successors, (28), 27 states have call predecessors, (28), 14 states have call successors, (28) [2022-07-19 17:27:29,190 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2022-07-19 17:27:29,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-07-19 17:27:29,191 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:27:29,191 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:27:29,207 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 17:27:29,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-19 17:27:29,403 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:27:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:27:29,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1821652060, now seen corresponding path program 8 times [2022-07-19 17:27:29,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:27:29,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590715176] [2022-07-19 17:27:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:27:29,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:27:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:29,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:27:29,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:29,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:29,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:29,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:29,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:29,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:29,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:29,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-19 17:27:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:29,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:29,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:29,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:29,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 18 proven. 93 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2022-07-19 17:27:29,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:27:29,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590715176] [2022-07-19 17:27:29,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590715176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:27:29,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196853598] [2022-07-19 17:27:29,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:27:29,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:29,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:27:29,809 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 17:27:29,810 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 17:27:29,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:27:29,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:27:29,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 97 conjunts are in the unsatisfiable core [2022-07-19 17:27:29,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:27:30,529 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 2 proven. 85 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2022-07-19 17:27:30,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:27:32,039 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 8 proven. 118 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2022-07-19 17:27:32,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196853598] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:27:32,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:27:32,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 18, 21] total 51 [2022-07-19 17:27:32,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351566196] [2022-07-19 17:27:32,040 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:27:32,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-19 17:27:32,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:27:32,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-19 17:27:32,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=2369, Unknown=0, NotChecked=0, Total=2550 [2022-07-19 17:27:32,041 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand has 51 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 32 states have internal predecessors, (66), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (20), 19 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-19 17:27:33,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:27:33,154 INFO L93 Difference]: Finished difference Result 96 states and 130 transitions. [2022-07-19 17:27:33,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-07-19 17:27:33,154 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 32 states have internal predecessors, (66), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (20), 19 states have call predecessors, (20), 10 states have call successors, (20) Word has length 62 [2022-07-19 17:27:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:27:33,155 INFO L225 Difference]: With dead ends: 96 [2022-07-19 17:27:33,155 INFO L226 Difference]: Without dead ends: 88 [2022-07-19 17:27:33,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 103 SyntacticMatches, 10 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=457, Invalid=4655, Unknown=0, NotChecked=0, Total=5112 [2022-07-19 17:27:33,157 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 35 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 1454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 17:27:33,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 473 Invalid, 1454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 17:27:33,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-19 17:27:33,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2022-07-19 17:27:33,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 50 states have (on average 1.08) internal successors, (54), 51 states have internal predecessors, (54), 9 states have call successors, (9), 4 states have call predecessors, (9), 14 states have return successors, (35), 18 states have call predecessors, (35), 9 states have call successors, (35) [2022-07-19 17:27:33,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 98 transitions. [2022-07-19 17:27:33,164 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 98 transitions. Word has length 62 [2022-07-19 17:27:33,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:27:33,165 INFO L495 AbstractCegarLoop]: Abstraction has 74 states and 98 transitions. [2022-07-19 17:27:33,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 47 states have (on average 1.4042553191489362) internal successors, (66), 32 states have internal predecessors, (66), 10 states have call successors, (10), 1 states have call predecessors, (10), 14 states have return successors, (20), 19 states have call predecessors, (20), 10 states have call successors, (20) [2022-07-19 17:27:33,165 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 98 transitions. [2022-07-19 17:27:33,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-19 17:27:33,166 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:27:33,166 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:27:33,184 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 17:27:33,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:33,384 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:27:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:27:33,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1119099064, now seen corresponding path program 9 times [2022-07-19 17:27:33,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:27:33,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205583430] [2022-07-19 17:27:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:27:33,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:27:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:27:33,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:33,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 17:27:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:33,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:33,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:27:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:27:34,692 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 32 proven. 178 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-19 17:27:34,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:27:34,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205583430] [2022-07-19 17:27:34,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205583430] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:27:34,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599564260] [2022-07-19 17:27:34,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 17:27:34,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:27:34,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:27:34,701 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 17:27:34,709 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 17:27:34,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-19 17:27:34,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:27:34,783 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 132 conjunts are in the unsatisfiable core [2022-07-19 17:27:34,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:27:36,014 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 20 proven. 174 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-07-19 17:27:36,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:28:40,112 WARN L233 SmtUtils]: Spent 8.04s on a formula simplification that was a NOOP. DAG size: 50 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-19 17:28:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 33 proven. 259 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2022-07-19 17:28:40,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599564260] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:28:40,387 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:28:40,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 41] total 81 [2022-07-19 17:28:40,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648714937] [2022-07-19 17:28:40,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:28:40,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-07-19 17:28:40,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:28:40,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-07-19 17:28:40,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=6148, Unknown=14, NotChecked=0, Total=6480 [2022-07-19 17:28:40,390 INFO L87 Difference]: Start difference. First operand 74 states and 98 transitions. Second operand has 81 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 51 states have internal predecessors, (107), 15 states have call successors, (15), 1 states have call predecessors, (15), 23 states have return successors, (32), 30 states have call predecessors, (32), 15 states have call successors, (32) [2022-07-19 17:28:42,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:28:42,186 INFO L93 Difference]: Finished difference Result 100 states and 134 transitions. [2022-07-19 17:28:42,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-19 17:28:42,186 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 51 states have internal predecessors, (107), 15 states have call successors, (15), 1 states have call predecessors, (15), 23 states have return successors, (32), 30 states have call predecessors, (32), 15 states have call successors, (32) Word has length 83 [2022-07-19 17:28:42,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:28:42,187 INFO L225 Difference]: With dead ends: 100 [2022-07-19 17:28:42,187 INFO L226 Difference]: Without dead ends: 94 [2022-07-19 17:28:42,189 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 124 SyntacticMatches, 14 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2712 ImplicationChecksByTransitivity, 64.3s TimeCoverageRelationStatistics Valid=860, Invalid=10256, Unknown=14, NotChecked=0, Total=11130 [2022-07-19 17:28:42,189 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 55 mSDsluCounter, 683 mSDsCounter, 0 mSdLazyCounter, 2001 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 2099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 50 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:28:42,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 705 Invalid, 2099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2001 Invalid, 0 Unknown, 50 Unchecked, 1.0s Time] [2022-07-19 17:28:42,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-19 17:28:42,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 80. [2022-07-19 17:28:42,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 55 states have internal predecessors, (58), 9 states have call successors, (9), 4 states have call predecessors, (9), 16 states have return successors, (38), 20 states have call predecessors, (38), 9 states have call successors, (38) [2022-07-19 17:28:42,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 105 transitions. [2022-07-19 17:28:42,206 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 105 transitions. Word has length 83 [2022-07-19 17:28:42,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:28:42,206 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 105 transitions. [2022-07-19 17:28:42,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 75 states have (on average 1.4266666666666667) internal successors, (107), 51 states have internal predecessors, (107), 15 states have call successors, (15), 1 states have call predecessors, (15), 23 states have return successors, (32), 30 states have call predecessors, (32), 15 states have call successors, (32) [2022-07-19 17:28:42,207 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 105 transitions. [2022-07-19 17:28:42,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-19 17:28:42,209 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:28:42,209 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:28:42,225 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 17:28:42,417 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-19 17:28:42,417 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:28:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:28:42,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1108033402, now seen corresponding path program 10 times [2022-07-19 17:28:42,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:28:42,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185988904] [2022-07-19 17:28:42,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:28:42,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:28:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:28:42,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:28:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:28:42,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:28:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:28:42,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:28:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:28:42,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:28:42,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:28:42,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:28:42,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:28:42,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:28:42,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:28:42,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-07-19 17:28:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:28:42,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:28:42,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:28:42,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:28:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:28:42,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:28:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:28:43,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:28:43,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:28:43,090 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 30 proven. 180 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2022-07-19 17:28:43,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:28:43,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185988904] [2022-07-19 17:28:43,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185988904] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:28:43,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880830432] [2022-07-19 17:28:43,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 17:28:43,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:28:43,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:28:43,092 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 17:28:43,093 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 17:28:43,161 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 17:28:43,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:28:43,163 WARN L261 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 133 conjunts are in the unsatisfiable core [2022-07-19 17:28:43,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:28:44,000 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 4 proven. 164 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2022-07-19 17:28:44,001 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:29:01,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880830432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:29:01,324 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:29:01,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 20] total 46 [2022-07-19 17:29:01,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125184139] [2022-07-19 17:29:01,324 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:29:01,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-19 17:29:01,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:29:01,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-19 17:29:01,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=4168, Unknown=7, NotChecked=0, Total=4422 [2022-07-19 17:29:01,325 INFO L87 Difference]: Start difference. First operand 80 states and 105 transitions. Second operand has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 28 states have internal predecessors, (53), 5 states have call successors, (5), 1 states have call predecessors, (5), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-19 17:29:02,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:29:02,221 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2022-07-19 17:29:02,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-19 17:29:02,221 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 28 states have internal predecessors, (53), 5 states have call successors, (5), 1 states have call predecessors, (5), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) Word has length 83 [2022-07-19 17:29:02,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:29:02,222 INFO L225 Difference]: With dead ends: 90 [2022-07-19 17:29:02,222 INFO L226 Difference]: Without dead ends: 86 [2022-07-19 17:29:02,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 109 SyntacticMatches, 11 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=486, Invalid=5827, Unknown=7, NotChecked=0, Total=6320 [2022-07-19 17:29:02,223 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 389 mSDsCounter, 0 mSdLazyCounter, 981 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 407 SdHoareTripleChecker+Invalid, 1023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 17:29:02,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 407 Invalid, 1023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 981 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 17:29:02,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-19 17:29:02,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 82. [2022-07-19 17:29:02,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 56 states have internal predecessors, (59), 10 states have call successors, (10), 4 states have call predecessors, (10), 16 states have return successors, (39), 21 states have call predecessors, (39), 10 states have call successors, (39) [2022-07-19 17:29:02,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2022-07-19 17:29:02,230 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 83 [2022-07-19 17:29:02,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:29:02,230 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2022-07-19 17:29:02,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 1.2325581395348837) internal successors, (53), 28 states have internal predecessors, (53), 5 states have call successors, (5), 1 states have call predecessors, (5), 17 states have return successors, (18), 18 states have call predecessors, (18), 5 states have call successors, (18) [2022-07-19 17:29:02,230 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2022-07-19 17:29:02,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-19 17:29:02,231 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:29:02,231 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:29:02,247 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 17:29:02,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-19 17:29:02,447 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:29:02,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:29:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1356577930, now seen corresponding path program 11 times [2022-07-19 17:29:02,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:29:02,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812936891] [2022-07-19 17:29:02,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:02,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:29:02,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:02,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:29:02,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:02,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:02,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:02,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:02,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:02,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-07-19 17:29:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:02,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:02,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:02,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:02,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:02,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2022-07-19 17:29:02,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:29:02,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812936891] [2022-07-19 17:29:02,930 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812936891] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:29:02,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097118237] [2022-07-19 17:29:02,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 17:29:02,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:29:02,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:29:02,931 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 17:29:02,932 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 17:29:03,005 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-19 17:29:03,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:29:03,007 WARN L261 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 109 conjunts are in the unsatisfiable core [2022-07-19 17:29:03,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:29:03,606 INFO L134 CoverageAnalysis]: Checked inductivity of 222 backedges. 4 proven. 106 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 17:29:03,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:29:18,381 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097118237] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:29:18,381 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:29:18,381 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 18] total 40 [2022-07-19 17:29:18,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107968088] [2022-07-19 17:29:18,381 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:29:18,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-19 17:29:18,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:29:18,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-19 17:29:18,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=3428, Unknown=6, NotChecked=0, Total=3660 [2022-07-19 17:29:18,382 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 14 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-19 17:29:19,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:29:19,058 INFO L93 Difference]: Finished difference Result 90 states and 114 transitions. [2022-07-19 17:29:19,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-19 17:29:19,058 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 14 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) Word has length 69 [2022-07-19 17:29:19,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:29:19,059 INFO L225 Difference]: With dead ends: 90 [2022-07-19 17:29:19,059 INFO L226 Difference]: Without dead ends: 86 [2022-07-19 17:29:19,059 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 95 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1156 ImplicationChecksByTransitivity, 14.4s TimeCoverageRelationStatistics Valid=425, Invalid=4681, Unknown=6, NotChecked=0, Total=5112 [2022-07-19 17:29:19,060 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 21 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 732 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-19 17:29:19,060 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 382 Invalid, 737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 732 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-19 17:29:19,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-07-19 17:29:19,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2022-07-19 17:29:19,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 8 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (34), 20 states have call predecessors, (34), 8 states have call successors, (34) [2022-07-19 17:29:19,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 96 transitions. [2022-07-19 17:29:19,066 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 96 transitions. Word has length 69 [2022-07-19 17:29:19,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:29:19,066 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 96 transitions. [2022-07-19 17:29:19,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 25 states have internal predecessors, (47), 5 states have call successors, (5), 1 states have call predecessors, (5), 14 states have return successors, (15), 15 states have call predecessors, (15), 5 states have call successors, (15) [2022-07-19 17:29:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 96 transitions. [2022-07-19 17:29:19,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-19 17:29:19,067 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:29:19,067 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:29:19,088 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 17:29:19,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-07-19 17:29:19,283 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:29:19,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:29:19,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1179471462, now seen corresponding path program 12 times [2022-07-19 17:29:19,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:29:19,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929480093] [2022-07-19 17:29:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:19,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:29:19,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:19,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:29:19,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:19,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:19,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-07-19 17:29:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:19,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:19,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:19,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:19,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:19,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:19,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:19,639 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 18 proven. 62 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2022-07-19 17:29:19,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:29:19,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929480093] [2022-07-19 17:29:19,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929480093] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:29:19,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221711234] [2022-07-19 17:29:19,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 17:29:19,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:29:19,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:29:19,641 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 17:29:19,641 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 17:29:19,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-19 17:29:19,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:29:19,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 81 conjunts are in the unsatisfiable core [2022-07-19 17:29:19,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:29:20,253 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 27 proven. 59 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-19 17:29:20,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:29:22,125 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 8 proven. 96 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-07-19 17:29:22,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221711234] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:29:22,125 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:29:22,125 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 26] total 63 [2022-07-19 17:29:22,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968447509] [2022-07-19 17:29:22,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:29:22,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-07-19 17:29:22,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:29:22,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-07-19 17:29:22,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=3657, Unknown=0, NotChecked=0, Total=3906 [2022-07-19 17:29:22,127 INFO L87 Difference]: Start difference. First operand 76 states and 96 transitions. Second operand has 63 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 42 states have internal predecessors, (86), 12 states have call successors, (12), 1 states have call predecessors, (12), 19 states have return successors, (21), 21 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-19 17:29:23,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:29:23,601 INFO L93 Difference]: Finished difference Result 88 states and 105 transitions. [2022-07-19 17:29:23,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-19 17:29:23,601 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 42 states have internal predecessors, (86), 12 states have call successors, (12), 1 states have call predecessors, (12), 19 states have return successors, (21), 21 states have call predecessors, (21), 12 states have call successors, (21) Word has length 55 [2022-07-19 17:29:23,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:29:23,602 INFO L225 Difference]: With dead ends: 88 [2022-07-19 17:29:23,602 INFO L226 Difference]: Without dead ends: 84 [2022-07-19 17:29:23,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1665 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=711, Invalid=6429, Unknown=0, NotChecked=0, Total=7140 [2022-07-19 17:29:23,604 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 77 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 1410 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 1548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1410 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 17:29:23,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 565 Invalid, 1548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1410 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 17:29:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-19 17:29:23,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-07-19 17:29:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 8 states have call successors, (8), 3 states have call predecessors, (8), 16 states have return successors, (33), 20 states have call predecessors, (33), 8 states have call successors, (33) [2022-07-19 17:29:23,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 95 transitions. [2022-07-19 17:29:23,610 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 95 transitions. Word has length 55 [2022-07-19 17:29:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:29:23,610 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 95 transitions. [2022-07-19 17:29:23,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 59 states have (on average 1.4576271186440677) internal successors, (86), 42 states have internal predecessors, (86), 12 states have call successors, (12), 1 states have call predecessors, (12), 19 states have return successors, (21), 21 states have call predecessors, (21), 12 states have call successors, (21) [2022-07-19 17:29:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 95 transitions. [2022-07-19 17:29:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-19 17:29:23,611 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:29:23,611 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:29:23,631 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 17:29:23,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-19 17:29:23,818 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:29:23,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:29:23,818 INFO L85 PathProgramCache]: Analyzing trace with hash -287264164, now seen corresponding path program 13 times [2022-07-19 17:29:23,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:29:23,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993017795] [2022-07-19 17:29:23,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:23,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:29:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:23,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:29:23,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:23,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:23,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:23,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 17:29:23,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:24,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:24,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:24,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:24,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:24,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:24,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:24,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:24,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:24,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:24,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:24,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:24,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 36 proven. 213 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-19 17:29:24,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:29:24,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993017795] [2022-07-19 17:29:24,518 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993017795] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:29:24,518 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631353326] [2022-07-19 17:29:24,518 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 17:29:24,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:29:24,519 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:29:24,520 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 17:29:24,521 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 17:29:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:24,594 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 145 conjunts are in the unsatisfiable core [2022-07-19 17:29:24,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:29:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 8 proven. 201 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2022-07-19 17:29:25,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:29:29,261 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 35 proven. 315 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2022-07-19 17:29:29,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631353326] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:29:29,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:29:29,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 26, 39] total 80 [2022-07-19 17:29:29,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492065080] [2022-07-19 17:29:29,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:29:29,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-19 17:29:29,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:29:29,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-19 17:29:29,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=6028, Unknown=0, NotChecked=0, Total=6320 [2022-07-19 17:29:29,265 INFO L87 Difference]: Start difference. First operand 76 states and 95 transitions. Second operand has 80 states, 76 states have (on average 1.4078947368421053) internal successors, (107), 47 states have internal predecessors, (107), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2022-07-19 17:29:31,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:29:31,236 INFO L93 Difference]: Finished difference Result 102 states and 130 transitions. [2022-07-19 17:29:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-19 17:29:31,237 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 76 states have (on average 1.4078947368421053) internal successors, (107), 47 states have internal predecessors, (107), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) Word has length 90 [2022-07-19 17:29:31,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:29:31,237 INFO L225 Difference]: With dead ends: 102 [2022-07-19 17:29:31,237 INFO L226 Difference]: Without dead ends: 96 [2022-07-19 17:29:31,239 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 143 SyntacticMatches, 13 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2708 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=827, Invalid=10515, Unknown=0, NotChecked=0, Total=11342 [2022-07-19 17:29:31,239 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 734 mSDsCounter, 0 mSdLazyCounter, 2334 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 756 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 2334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:29:31,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 756 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 2334 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 17:29:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-19 17:29:31,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 82. [2022-07-19 17:29:31,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (36), 22 states have call predecessors, (36), 8 states have call successors, (36) [2022-07-19 17:29:31,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2022-07-19 17:29:31,245 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 90 [2022-07-19 17:29:31,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:29:31,246 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2022-07-19 17:29:31,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 76 states have (on average 1.4078947368421053) internal successors, (107), 47 states have internal predecessors, (107), 16 states have call successors, (16), 1 states have call predecessors, (16), 23 states have return successors, (34), 33 states have call predecessors, (34), 16 states have call successors, (34) [2022-07-19 17:29:31,246 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2022-07-19 17:29:31,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-07-19 17:29:31,247 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:29:31,247 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:29:31,265 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 17:29:31,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:29:31,465 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:29:31,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:29:31,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1533046684, now seen corresponding path program 14 times [2022-07-19 17:29:31,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:29:31,466 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836415314] [2022-07-19 17:29:31,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:31,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:29:31,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:31,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:29:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:31,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:31,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:31,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:31,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:31,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:31,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:31,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:31,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:31,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:31,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2022-07-19 17:29:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:31,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:31,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:32,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:32,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:32,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:32,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:32,167 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 34 proven. 215 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2022-07-19 17:29:32,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:29:32,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836415314] [2022-07-19 17:29:32,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836415314] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:29:32,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071527251] [2022-07-19 17:29:32,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:29:32,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:29:32,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:29:32,169 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 17:29:32,170 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 17:29:32,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:29:32,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:29:32,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 145 conjunts are in the unsatisfiable core [2022-07-19 17:29:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:29:33,183 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 4 proven. 199 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2022-07-19 17:29:33,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:29:51,841 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071527251] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:29:51,841 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:29:51,841 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 22] total 50 [2022-07-19 17:29:51,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873306150] [2022-07-19 17:29:51,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:29:51,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-19 17:29:51,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:29:51,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-19 17:29:51,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=4704, Unknown=7, NotChecked=0, Total=4970 [2022-07-19 17:29:51,843 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) [2022-07-19 17:29:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:29:52,848 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2022-07-19 17:29:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-19 17:29:52,848 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) Word has length 90 [2022-07-19 17:29:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:29:52,849 INFO L225 Difference]: With dead ends: 92 [2022-07-19 17:29:52,849 INFO L226 Difference]: Without dead ends: 88 [2022-07-19 17:29:52,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 118 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 18.4s TimeCoverageRelationStatistics Valid=536, Invalid=6767, Unknown=7, NotChecked=0, Total=7310 [2022-07-19 17:29:52,851 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 19 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 504 SdHoareTripleChecker+Invalid, 1105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 17:29:52,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 504 Invalid, 1105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 17:29:52,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-07-19 17:29:52,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 82. [2022-07-19 17:29:52,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 8 states have call successors, (8), 3 states have call predecessors, (8), 18 states have return successors, (36), 22 states have call predecessors, (36), 8 states have call successors, (36) [2022-07-19 17:29:52,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 102 transitions. [2022-07-19 17:29:52,857 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 102 transitions. Word has length 90 [2022-07-19 17:29:52,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:29:52,857 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 102 transitions. [2022-07-19 17:29:52,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 1.2127659574468086) internal successors, (57), 30 states have internal predecessors, (57), 5 states have call successors, (5), 1 states have call predecessors, (5), 19 states have return successors, (20), 20 states have call predecessors, (20), 5 states have call successors, (20) [2022-07-19 17:29:52,857 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 102 transitions. [2022-07-19 17:29:52,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-19 17:29:52,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:29:52,858 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:29:52,874 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 17:29:53,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-19 17:29:53,072 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:29:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:29:53,072 INFO L85 PathProgramCache]: Analyzing trace with hash -401646488, now seen corresponding path program 15 times [2022-07-19 17:29:53,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:29:53,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409623247] [2022-07-19 17:29:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:29:53,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:29:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:29:53,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:53,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 17:29:53,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:53,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:53,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:53,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:29:53,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:29:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 40 proven. 251 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-19 17:29:53,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:29:53,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409623247] [2022-07-19 17:29:53,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409623247] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:29:53,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645082173] [2022-07-19 17:29:53,854 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 17:29:53,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:29:53,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:29:53,855 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 17:29:53,857 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 17:29:53,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2022-07-19 17:29:53,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:29:53,956 WARN L261 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 156 conjunts are in the unsatisfiable core [2022-07-19 17:29:53,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:29:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 24 proven. 247 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2022-07-19 17:29:55,166 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:29:59,268 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 384 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2022-07-19 17:29:59,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645082173] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:29:59,268 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:29:59,268 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 31, 45] total 89 [2022-07-19 17:29:59,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359848442] [2022-07-19 17:29:59,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:29:59,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-07-19 17:29:59,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:29:59,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-07-19 17:29:59,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=7497, Unknown=0, NotChecked=0, Total=7832 [2022-07-19 17:29:59,270 INFO L87 Difference]: Start difference. First operand 82 states and 102 transitions. Second operand has 89 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 53 states have internal predecessors, (121), 17 states have call successors, (17), 1 states have call predecessors, (17), 26 states have return successors, (38), 36 states have call predecessors, (38), 17 states have call successors, (38) [2022-07-19 17:30:01,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:30:01,422 INFO L93 Difference]: Finished difference Result 108 states and 137 transitions. [2022-07-19 17:30:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-07-19 17:30:01,422 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 53 states have internal predecessors, (121), 17 states have call successors, (17), 1 states have call predecessors, (17), 26 states have return successors, (38), 36 states have call predecessors, (38), 17 states have call successors, (38) Word has length 97 [2022-07-19 17:30:01,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:30:01,423 INFO L225 Difference]: With dead ends: 108 [2022-07-19 17:30:01,423 INFO L226 Difference]: Without dead ends: 102 [2022-07-19 17:30:01,424 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 148 SyntacticMatches, 17 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3312 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=987, Invalid=12819, Unknown=0, NotChecked=0, Total=13806 [2022-07-19 17:30:01,425 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 169 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 2383 mSolverCounterSat, 310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 310 IncrementalHoareTripleChecker+Valid, 2383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-19 17:30:01,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 795 Invalid, 2693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [310 Valid, 2383 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-07-19 17:30:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-19 17:30:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 88. [2022-07-19 17:30:01,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 8 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (39), 24 states have call predecessors, (39), 8 states have call successors, (39) [2022-07-19 17:30:01,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-07-19 17:30:01,444 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 97 [2022-07-19 17:30:01,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:30:01,444 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-07-19 17:30:01,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 84 states have (on average 1.4404761904761905) internal successors, (121), 53 states have internal predecessors, (121), 17 states have call successors, (17), 1 states have call predecessors, (17), 26 states have return successors, (38), 36 states have call predecessors, (38), 17 states have call successors, (38) [2022-07-19 17:30:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-07-19 17:30:01,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-07-19 17:30:01,445 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:30:01,445 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:30:01,461 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 17:30:01,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-19 17:30:01,660 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:30:01,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:30:01,660 INFO L85 PathProgramCache]: Analyzing trace with hash -14301802, now seen corresponding path program 16 times [2022-07-19 17:30:01,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:30:01,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136608068] [2022-07-19 17:30:01,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:30:01,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:30:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:01,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:30:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:01,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:01,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:01,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:01,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:01,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:01,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:01,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:01,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:02,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:02,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-07-19 17:30:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:02,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:02,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:02,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:02,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:02,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:02,440 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 38 proven. 253 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2022-07-19 17:30:02,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:30:02,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136608068] [2022-07-19 17:30:02,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136608068] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:30:02,440 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767220604] [2022-07-19 17:30:02,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-19 17:30:02,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:30:02,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:30:02,442 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 17:30:02,443 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 17:30:02,540 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-19 17:30:02,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:30:02,542 WARN L261 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 157 conjunts are in the unsatisfiable core [2022-07-19 17:30:02,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:30:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 4 proven. 237 refuted. 0 times theorem prover too weak. 259 trivial. 0 not checked. [2022-07-19 17:30:03,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:30:22,641 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767220604] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:30:22,641 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-19 17:30:22,641 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 24] total 54 [2022-07-19 17:30:22,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375405262] [2022-07-19 17:30:22,642 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-19 17:30:22,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-19 17:30:22,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:30:22,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-19 17:30:22,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5271, Unknown=8, NotChecked=0, Total=5550 [2022-07-19 17:30:22,643 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 54 states, 51 states have (on average 1.196078431372549) internal successors, (61), 32 states have internal predecessors, (61), 5 states have call successors, (5), 1 states have call predecessors, (5), 21 states have return successors, (22), 22 states have call predecessors, (22), 5 states have call successors, (22) [2022-07-19 17:30:23,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:30:23,822 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2022-07-19 17:30:23,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-19 17:30:23,822 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 1.196078431372549) internal successors, (61), 32 states have internal predecessors, (61), 5 states have call successors, (5), 1 states have call predecessors, (5), 21 states have return successors, (22), 22 states have call predecessors, (22), 5 states have call successors, (22) Word has length 97 [2022-07-19 17:30:23,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:30:23,823 INFO L225 Difference]: With dead ends: 98 [2022-07-19 17:30:23,823 INFO L226 Difference]: Without dead ends: 94 [2022-07-19 17:30:23,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 122 SyntacticMatches, 12 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=586, Invalid=7778, Unknown=8, NotChecked=0, Total=8372 [2022-07-19 17:30:23,824 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1374 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 1398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 17:30:23,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 549 Invalid, 1398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1374 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 17:30:23,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-07-19 17:30:23,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 88. [2022-07-19 17:30:23,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 8 states have call successors, (8), 3 states have call predecessors, (8), 20 states have return successors, (39), 24 states have call predecessors, (39), 8 states have call successors, (39) [2022-07-19 17:30:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 109 transitions. [2022-07-19 17:30:23,831 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 109 transitions. Word has length 97 [2022-07-19 17:30:23,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:30:23,831 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 109 transitions. [2022-07-19 17:30:23,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 1.196078431372549) internal successors, (61), 32 states have internal predecessors, (61), 5 states have call successors, (5), 1 states have call predecessors, (5), 21 states have return successors, (22), 22 states have call predecessors, (22), 5 states have call successors, (22) [2022-07-19 17:30:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 109 transitions. [2022-07-19 17:30:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-19 17:30:23,832 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:30:23,832 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:30:23,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-19 17:30:24,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:30:24,050 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:30:24,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:30:24,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1817590444, now seen corresponding path program 17 times [2022-07-19 17:30:24,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:30:24,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281411713] [2022-07-19 17:30:24,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:30:24,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:30:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:30:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:24,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:24,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 17:30:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:24,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:24,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:24,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:24,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:24,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:24,932 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 44 proven. 292 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-07-19 17:30:24,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:30:24,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281411713] [2022-07-19 17:30:24,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281411713] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:30:24,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954328008] [2022-07-19 17:30:24,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-19 17:30:24,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:30:24,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:30:24,934 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 17:30:24,934 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 17:30:25,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-19 17:30:25,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:30:25,038 WARN L261 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 169 conjunts are in the unsatisfiable core [2022-07-19 17:30:25,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:30:26,200 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 21 proven. 268 refuted. 0 times theorem prover too weak. 298 trivial. 0 not checked. [2022-07-19 17:30:26,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:30:31,057 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 42 proven. 451 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-07-19 17:30:31,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954328008] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:30:31,057 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:30:31,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 30, 45] total 92 [2022-07-19 17:30:31,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950761643] [2022-07-19 17:30:31,057 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:30:31,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-07-19 17:30:31,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:30:31,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-07-19 17:30:31,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=8036, Unknown=0, NotChecked=0, Total=8372 [2022-07-19 17:30:31,059 INFO L87 Difference]: Start difference. First operand 88 states and 109 transitions. Second operand has 92 states, 88 states have (on average 1.4318181818181819) internal successors, (126), 53 states have internal predecessors, (126), 18 states have call successors, (18), 1 states have call predecessors, (18), 27 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) [2022-07-19 17:30:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:30:33,291 INFO L93 Difference]: Finished difference Result 114 states and 144 transitions. [2022-07-19 17:30:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-19 17:30:33,291 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 88 states have (on average 1.4318181818181819) internal successors, (126), 53 states have internal predecessors, (126), 18 states have call successors, (18), 1 states have call predecessors, (18), 27 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) Word has length 104 [2022-07-19 17:30:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:30:33,292 INFO L225 Difference]: With dead ends: 114 [2022-07-19 17:30:33,292 INFO L226 Difference]: Without dead ends: 108 [2022-07-19 17:30:33,293 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 163 SyntacticMatches, 17 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3675 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1019, Invalid=13987, Unknown=0, NotChecked=0, Total=15006 [2022-07-19 17:30:33,294 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 77 mSDsluCounter, 912 mSDsCounter, 0 mSdLazyCounter, 2740 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 939 SdHoareTripleChecker+Invalid, 2868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-19 17:30:33,294 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 939 Invalid, 2868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2740 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-07-19 17:30:33,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-19 17:30:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 94. [2022-07-19 17:30:33,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 8 states have call successors, (8), 3 states have call predecessors, (8), 22 states have return successors, (42), 26 states have call predecessors, (42), 8 states have call successors, (42) [2022-07-19 17:30:33,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 116 transitions. [2022-07-19 17:30:33,301 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 116 transitions. Word has length 104 [2022-07-19 17:30:33,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:30:33,301 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 116 transitions. [2022-07-19 17:30:33,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 88 states have (on average 1.4318181818181819) internal successors, (126), 53 states have internal predecessors, (126), 18 states have call successors, (18), 1 states have call predecessors, (18), 27 states have return successors, (40), 39 states have call predecessors, (40), 18 states have call successors, (40) [2022-07-19 17:30:33,302 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2022-07-19 17:30:33,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-07-19 17:30:33,302 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:30:33,302 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:30:33,319 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 17:30:33,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:30:33,520 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:30:33,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:30:33,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1254586740, now seen corresponding path program 18 times [2022-07-19 17:30:33,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:30:33,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519921557] [2022-07-19 17:30:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:30:33,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:30:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:33,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:30:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:33,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:33,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:33,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:33,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:33,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:33,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:33,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:33,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:33,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:34,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:34,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-07-19 17:30:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:34,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:34,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:34,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:34,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:34,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:34,424 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 42 proven. 294 refuted. 0 times theorem prover too weak. 251 trivial. 0 not checked. [2022-07-19 17:30:34,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:30:34,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519921557] [2022-07-19 17:30:34,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519921557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:30:34,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193250037] [2022-07-19 17:30:34,425 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-19 17:30:34,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:30:34,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:30:34,426 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 17:30:34,439 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 17:30:34,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-07-19 17:30:34,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:30:34,551 WARN L261 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 168 conjunts are in the unsatisfiable core [2022-07-19 17:30:34,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:30:35,908 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 26 proven. 282 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-07-19 17:30:35,908 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:30:40,664 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 17 proven. 457 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2022-07-19 17:30:40,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1193250037] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:30:40,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:30:40,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 30, 37] total 84 [2022-07-19 17:30:40,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696888700] [2022-07-19 17:30:40,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:30:40,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-07-19 17:30:40,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:30:40,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-07-19 17:30:40,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=6646, Unknown=0, NotChecked=0, Total=6972 [2022-07-19 17:30:40,666 INFO L87 Difference]: Start difference. First operand 94 states and 116 transitions. Second operand has 84 states, 79 states have (on average 1.4050632911392404) internal successors, (111), 51 states have internal predecessors, (111), 15 states have call successors, (15), 1 states have call predecessors, (15), 25 states have return successors, (36), 33 states have call predecessors, (36), 15 states have call successors, (36) [2022-07-19 17:30:42,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:30:42,557 INFO L93 Difference]: Finished difference Result 110 states and 145 transitions. [2022-07-19 17:30:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-19 17:30:42,558 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 79 states have (on average 1.4050632911392404) internal successors, (111), 51 states have internal predecessors, (111), 15 states have call successors, (15), 1 states have call predecessors, (15), 25 states have return successors, (36), 33 states have call predecessors, (36), 15 states have call successors, (36) Word has length 104 [2022-07-19 17:30:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:30:42,558 INFO L225 Difference]: With dead ends: 110 [2022-07-19 17:30:42,559 INFO L226 Difference]: Without dead ends: 104 [2022-07-19 17:30:42,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 163 SyntacticMatches, 25 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3180 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=897, Invalid=11093, Unknown=0, NotChecked=0, Total=11990 [2022-07-19 17:30:42,560 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 106 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 2071 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 2278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 2071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-19 17:30:42,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 641 Invalid, 2278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 2071 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-19 17:30:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-19 17:30:42,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 92. [2022-07-19 17:30:42,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 7 states have call successors, (7), 3 states have call predecessors, (7), 22 states have return successors, (40), 25 states have call predecessors, (40), 7 states have call successors, (40) [2022-07-19 17:30:42,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 112 transitions. [2022-07-19 17:30:42,567 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 112 transitions. Word has length 104 [2022-07-19 17:30:42,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:30:42,567 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 112 transitions. [2022-07-19 17:30:42,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 79 states have (on average 1.4050632911392404) internal successors, (111), 51 states have internal predecessors, (111), 15 states have call successors, (15), 1 states have call predecessors, (15), 25 states have return successors, (36), 33 states have call predecessors, (36), 15 states have call successors, (36) [2022-07-19 17:30:42,568 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 112 transitions. [2022-07-19 17:30:42,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-19 17:30:42,568 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:30:42,568 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:30:42,585 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2022-07-19 17:30:42,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:30:42,785 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:30:42,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:30:42,786 INFO L85 PathProgramCache]: Analyzing trace with hash 200427544, now seen corresponding path program 19 times [2022-07-19 17:30:42,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:30:42,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947056122] [2022-07-19 17:30:42,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:30:42,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:30:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:42,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:30:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:42,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:42,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:42,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 17:30:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:43,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:43,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:43,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:43,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:43,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:43,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:43,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:43,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:43,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:43,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:43,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:43,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:43,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:43,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:43,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:43,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:43,807 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 48 proven. 336 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2022-07-19 17:30:43,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:30:43,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947056122] [2022-07-19 17:30:43,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947056122] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:30:43,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684293182] [2022-07-19 17:30:43,808 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-19 17:30:43,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:30:43,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:30:43,809 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 17:30:43,809 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 17:30:43,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:43,936 WARN L261 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 181 conjunts are in the unsatisfiable core [2022-07-19 17:30:43,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:30:45,425 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 11 proven. 321 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2022-07-19 17:30:45,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:30:52,019 WARN L833 $PredicateComparison]: unable to prove that (and (<= (div (+ (- 11) |c_mult_#res|) (- 11)) 1) (<= |c_mult_#in~m| 0) (forall ((|aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125_139| Int) (|aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125| Int) (|aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125_139| Int) (v_mult_~n_BEFORE_CALL_275 Int) (|aux_div_v_mult_#in~n_BEFORE_CALL_275_115| Int)) (let ((.cse2 (div (+ (* 2 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125_139|) (* 22 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125_139|) (* v_mult_~n_BEFORE_CALL_275 (- 2))) 11)) (.cse3 (div (+ (* (- 22) |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125_139|) (* (- 2) |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125_139|) (* v_mult_~n_BEFORE_CALL_275 2)) (- 11))) (.cse1 (* |aux_div_v_mult_#in~n_BEFORE_CALL_275_115| 11)) (.cse0 (* 11 |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125_139|))) (or (<= (+ .cse0 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125_139| |c_mult_#res| 11) .cse1) (< |aux_div_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125_139| .cse2) (< .cse3 |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125|) (<= |aux_div_v_mult_#in~n_BEFORE_CALL_275_115| .cse3) (< |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125_139| 0) (< .cse2 .cse3) (< .cse1 (+ .cse0 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125_139| |c_mult_#res|)) (< (* |aux_div_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125| 11) (+ .cse0 |aux_mod_aux_mod_aux_mod_v_mult_#in~n_BEFORE_CALL_275_115_125_139|))))) (not (< |c_mult_#in~m| 0))) is different from false [2022-07-19 17:30:52,180 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 44 proven. 502 refuted. 0 times theorem prover too weak. 107 trivial. 28 not checked. [2022-07-19 17:30:52,181 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684293182] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:30:52,181 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:30:52,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 32, 49] total 99 [2022-07-19 17:30:52,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631623881] [2022-07-19 17:30:52,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:30:52,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-07-19 17:30:52,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:30:52,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-07-19 17:30:52,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=9149, Unknown=1, NotChecked=192, Total=9702 [2022-07-19 17:30:52,183 INFO L87 Difference]: Start difference. First operand 92 states and 112 transitions. Second operand has 99 states, 95 states have (on average 1.4) internal successors, (133), 57 states have internal predecessors, (133), 19 states have call successors, (19), 1 states have call predecessors, (19), 30 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) [2022-07-19 17:30:55,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:30:55,078 INFO L93 Difference]: Finished difference Result 114 states and 143 transitions. [2022-07-19 17:30:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-19 17:30:55,078 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 95 states have (on average 1.4) internal successors, (133), 57 states have internal predecessors, (133), 19 states have call successors, (19), 1 states have call predecessors, (19), 30 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) Word has length 111 [2022-07-19 17:30:55,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:30:55,079 INFO L225 Difference]: With dead ends: 114 [2022-07-19 17:30:55,080 INFO L226 Difference]: Without dead ends: 108 [2022-07-19 17:30:55,081 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 175 SyntacticMatches, 16 SemanticMatches, 129 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 4060 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1119, Invalid=15654, Unknown=1, NotChecked=256, Total=17030 [2022-07-19 17:30:55,081 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 83 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 3375 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1126 SdHoareTripleChecker+Invalid, 3564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-19 17:30:55,081 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 1126 Invalid, 3564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3375 Invalid, 0 Unknown, 72 Unchecked, 1.6s Time] [2022-07-19 17:30:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-07-19 17:30:55,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 98. [2022-07-19 17:30:55,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 67 states have internal predecessors, (69), 7 states have call successors, (7), 3 states have call predecessors, (7), 24 states have return successors, (43), 27 states have call predecessors, (43), 7 states have call successors, (43) [2022-07-19 17:30:55,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 119 transitions. [2022-07-19 17:30:55,088 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 119 transitions. Word has length 111 [2022-07-19 17:30:55,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:30:55,088 INFO L495 AbstractCegarLoop]: Abstraction has 98 states and 119 transitions. [2022-07-19 17:30:55,089 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 95 states have (on average 1.4) internal successors, (133), 57 states have internal predecessors, (133), 19 states have call successors, (19), 1 states have call predecessors, (19), 30 states have return successors, (43), 42 states have call predecessors, (43), 19 states have call successors, (43) [2022-07-19 17:30:55,089 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 119 transitions. [2022-07-19 17:30:55,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-07-19 17:30:55,089 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:30:55,090 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:30:55,106 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 17:30:55,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2022-07-19 17:30:55,303 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:30:55,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:30:55,304 INFO L85 PathProgramCache]: Analyzing trace with hash -745432324, now seen corresponding path program 20 times [2022-07-19 17:30:55,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:30:55,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744087318] [2022-07-19 17:30:55,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:30:55,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:30:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:55,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:30:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:55,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:55,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:55,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:55,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:55,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 17:30:55,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:55,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:55,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:55,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:55,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:55,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:55,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:55,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:55,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:55,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:55,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:55,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:56,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:56,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:56,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:56,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:56,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:56,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:30:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:30:56,377 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 52 proven. 383 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-07-19 17:30:56,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:30:56,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744087318] [2022-07-19 17:30:56,377 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744087318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:30:56,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713960281] [2022-07-19 17:30:56,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-19 17:30:56,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:30:56,377 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:30:56,379 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 17:30:56,379 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 17:30:56,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-19 17:30:56,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:30:56,514 WARN L261 TraceCheckSpWp]: Trace formula consists of 349 conjuncts, 193 conjunts are in the unsatisfiable core [2022-07-19 17:30:56,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:30:58,291 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 12 proven. 367 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2022-07-19 17:30:58,291 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 17:31:04,785 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 47 proven. 611 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2022-07-19 17:31:04,785 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [713960281] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 17:31:04,785 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 17:31:04,786 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 34, 51] total 104 [2022-07-19 17:31:04,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374121530] [2022-07-19 17:31:04,786 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 17:31:04,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-07-19 17:31:04,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 17:31:04,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-07-19 17:31:04,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=10332, Unknown=0, NotChecked=0, Total=10712 [2022-07-19 17:31:04,788 INFO L87 Difference]: Start difference. First operand 98 states and 119 transitions. Second operand has 104 states, 100 states have (on average 1.39) internal successors, (139), 59 states have internal predecessors, (139), 20 states have call successors, (20), 1 states have call predecessors, (20), 31 states have return successors, (46), 45 states have call predecessors, (46), 20 states have call successors, (46) [2022-07-19 17:31:07,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 17:31:07,858 INFO L93 Difference]: Finished difference Result 120 states and 150 transitions. [2022-07-19 17:31:07,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-19 17:31:07,859 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 100 states have (on average 1.39) internal successors, (139), 59 states have internal predecessors, (139), 20 states have call successors, (20), 1 states have call predecessors, (20), 31 states have return successors, (46), 45 states have call predecessors, (46), 20 states have call successors, (46) Word has length 118 [2022-07-19 17:31:07,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 17:31:07,860 INFO L225 Difference]: With dead ends: 120 [2022-07-19 17:31:07,860 INFO L226 Difference]: Without dead ends: 114 [2022-07-19 17:31:07,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 186 SyntacticMatches, 18 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4590 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=1223, Invalid=17683, Unknown=0, NotChecked=0, Total=18906 [2022-07-19 17:31:07,862 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 188 mSDsluCounter, 1026 mSDsCounter, 0 mSdLazyCounter, 3365 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 1052 SdHoareTripleChecker+Invalid, 3722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 3365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-19 17:31:07,862 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 1052 Invalid, 3722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 3365 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-19 17:31:07,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-07-19 17:31:07,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 104. [2022-07-19 17:31:07,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 70 states have (on average 1.042857142857143) internal successors, (73), 71 states have internal predecessors, (73), 7 states have call successors, (7), 3 states have call predecessors, (7), 26 states have return successors, (46), 29 states have call predecessors, (46), 7 states have call successors, (46) [2022-07-19 17:31:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 126 transitions. [2022-07-19 17:31:07,870 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 126 transitions. Word has length 118 [2022-07-19 17:31:07,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 17:31:07,870 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 126 transitions. [2022-07-19 17:31:07,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 100 states have (on average 1.39) internal successors, (139), 59 states have internal predecessors, (139), 20 states have call successors, (20), 1 states have call predecessors, (20), 31 states have return successors, (46), 45 states have call predecessors, (46), 20 states have call successors, (46) [2022-07-19 17:31:07,870 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 126 transitions. [2022-07-19 17:31:07,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-07-19 17:31:07,872 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 17:31:07,872 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 17:31:07,889 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 17:31:08,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2022-07-19 17:31:08,079 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 17:31:08,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 17:31:08,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1149117496, now seen corresponding path program 21 times [2022-07-19 17:31:08,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 17:31:08,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083994581] [2022-07-19 17:31:08,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 17:31:08,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 17:31:08,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-19 17:31:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:08,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-07-19 17:31:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:08,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:08,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:08,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:08,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:08,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:08,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:09,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:09,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:09,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:09,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:09,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-07-19 17:31:09,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 17:31:09,243 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 56 proven. 433 refuted. 0 times theorem prover too weak. 401 trivial. 0 not checked. [2022-07-19 17:31:09,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 17:31:09,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083994581] [2022-07-19 17:31:09,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083994581] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 17:31:09,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949371917] [2022-07-19 17:31:09,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-19 17:31:09,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 17:31:09,244 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 17:31:09,245 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 17:31:09,246 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 17:31:09,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2022-07-19 17:31:09,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-19 17:31:09,449 WARN L261 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 204 conjunts are in the unsatisfiable core [2022-07-19 17:31:09,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 17:31:11,493 INFO L134 CoverageAnalysis]: Checked inductivity of 890 backedges. 32 proven. 429 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2022-07-19 17:31:11,493 INFO L328 TraceCheckSpWp]: Computing backward predicates...