./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem03_label28.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/eca-rers2012/Problem03_label28.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 480af262cda4397eeb9e570da47990ce157a2b110ec643ba069b0968d8ba36a6 --- Real Ultimate output --- This is Ultimate 0.2.2-?-eb692b5 [2022-07-19 11:12:19,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-19 11:12:19,553 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-19 11:12:19,584 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-19 11:12:19,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-19 11:12:19,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-19 11:12:19,590 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-19 11:12:19,595 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-19 11:12:19,597 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-19 11:12:19,602 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-19 11:12:19,603 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-19 11:12:19,605 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-19 11:12:19,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-19 11:12:19,606 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-19 11:12:19,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-19 11:12:19,609 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-19 11:12:19,610 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-19 11:12:19,611 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-19 11:12:19,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-19 11:12:19,618 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-19 11:12:19,619 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-19 11:12:19,620 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-19 11:12:19,621 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-19 11:12:19,621 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-19 11:12:19,623 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-19 11:12:19,626 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-19 11:12:19,626 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-19 11:12:19,627 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-19 11:12:19,628 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-19 11:12:19,628 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-19 11:12:19,629 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-19 11:12:19,629 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-19 11:12:19,630 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-19 11:12:19,631 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-19 11:12:19,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-19 11:12:19,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-19 11:12:19,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-19 11:12:19,632 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-19 11:12:19,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-19 11:12:19,633 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-19 11:12:19,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-19 11:12:19,635 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-19 11:12:19,636 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-19 11:12:19,661 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-19 11:12:19,662 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-19 11:12:19,662 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-19 11:12:19,662 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-19 11:12:19,663 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-19 11:12:19,663 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-19 11:12:19,664 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-19 11:12:19,664 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-19 11:12:19,664 INFO L138 SettingsManager]: * Use SBE=true [2022-07-19 11:12:19,665 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-19 11:12:19,665 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-19 11:12:19,665 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-19 11:12:19,665 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-19 11:12:19,665 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-19 11:12:19,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-19 11:12:19,666 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-19 11:12:19,666 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-19 11:12:19,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-19 11:12:19,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-19 11:12:19,667 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-19 11:12:19,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-19 11:12:19,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-19 11:12:19,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-19 11:12:19,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-19 11:12:19,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:12:19,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-19 11:12:19,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-19 11:12:19,668 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-19 11:12:19,668 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-19 11:12:19,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-19 11:12:19,669 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-19 11:12:19,669 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-19 11:12:19,669 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-19 11:12:19,669 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 480af262cda4397eeb9e570da47990ce157a2b110ec643ba069b0968d8ba36a6 [2022-07-19 11:12:19,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-19 11:12:19,920 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-19 11:12:19,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-19 11:12:19,923 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-19 11:12:19,924 INFO L275 PluginConnector]: CDTParser initialized [2022-07-19 11:12:19,924 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem03_label28.c [2022-07-19 11:12:19,967 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e57135ece/f06e361056734015ada4d615138cd715/FLAG50855005b [2022-07-19 11:12:20,416 INFO L306 CDTParser]: Found 1 translation units. [2022-07-19 11:12:20,417 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem03_label28.c [2022-07-19 11:12:20,431 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e57135ece/f06e361056734015ada4d615138cd715/FLAG50855005b [2022-07-19 11:12:20,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e57135ece/f06e361056734015ada4d615138cd715 [2022-07-19 11:12:20,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-19 11:12:20,449 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-19 11:12:20,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-19 11:12:20,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-19 11:12:20,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-19 11:12:20,452 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:12:20" (1/1) ... [2022-07-19 11:12:20,453 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@64d74717 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:20, skipping insertion in model container [2022-07-19 11:12:20,453 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.07 11:12:20" (1/1) ... [2022-07-19 11:12:20,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-19 11:12:20,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-19 11:12:20,967 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/eca-rers2012/Problem03_label28.c[54731,54744] [2022-07-19 11:12:20,999 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:12:21,006 INFO L203 MainTranslator]: Completed pre-run [2022-07-19 11:12:21,121 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/eca-rers2012/Problem03_label28.c[54731,54744] [2022-07-19 11:12:21,133 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-19 11:12:21,144 INFO L208 MainTranslator]: Completed translation [2022-07-19 11:12:21,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:21 WrapperNode [2022-07-19 11:12:21,145 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-19 11:12:21,146 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-19 11:12:21,146 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-19 11:12:21,146 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-19 11:12:21,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:21" (1/1) ... [2022-07-19 11:12:21,179 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:21" (1/1) ... [2022-07-19 11:12:21,238 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2022-07-19 11:12:21,238 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-19 11:12:21,239 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-19 11:12:21,239 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-19 11:12:21,239 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-19 11:12:21,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:21" (1/1) ... [2022-07-19 11:12:21,245 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:21" (1/1) ... [2022-07-19 11:12:21,251 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:21" (1/1) ... [2022-07-19 11:12:21,251 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:21" (1/1) ... [2022-07-19 11:12:21,280 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:21" (1/1) ... [2022-07-19 11:12:21,287 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:21" (1/1) ... [2022-07-19 11:12:21,294 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:21" (1/1) ... [2022-07-19 11:12:21,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-19 11:12:21,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-19 11:12:21,334 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-19 11:12:21,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-19 11:12:21,340 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:21" (1/1) ... [2022-07-19 11:12:21,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-19 11:12:21,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:21,371 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 11:12:21,383 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 11:12:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-19 11:12:21,422 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-19 11:12:21,423 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-19 11:12:21,423 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-19 11:12:21,478 INFO L234 CfgBuilder]: Building ICFG [2022-07-19 11:12:21,482 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-19 11:12:22,512 INFO L275 CfgBuilder]: Performing block encoding [2022-07-19 11:12:22,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-19 11:12:22,525 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-19 11:12:22,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:12:22 BoogieIcfgContainer [2022-07-19 11:12:22,528 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-19 11:12:22,530 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-19 11:12:22,530 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-19 11:12:22,532 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-19 11:12:22,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.07 11:12:20" (1/3) ... [2022-07-19 11:12:22,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfbbace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:12:22, skipping insertion in model container [2022-07-19 11:12:22,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.07 11:12:21" (2/3) ... [2022-07-19 11:12:22,533 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5bfbbace and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.07 11:12:22, skipping insertion in model container [2022-07-19 11:12:22,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.07 11:12:22" (3/3) ... [2022-07-19 11:12:22,535 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label28.c [2022-07-19 11:12:22,547 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-19 11:12:22,548 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-19 11:12:22,599 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-19 11:12:22,606 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@7272583d, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@5cef4841 [2022-07-19 11:12:22,606 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-19 11:12:22,620 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:22,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-07-19 11:12:22,636 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:22,637 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:22,638 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:22,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:22,643 INFO L85 PathProgramCache]: Analyzing trace with hash 697342114, now seen corresponding path program 1 times [2022-07-19 11:12:22,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:22,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851727025] [2022-07-19 11:12:22,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:22,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:22,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:22,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:12:22,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:22,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851727025] [2022-07-19 11:12:22,997 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851727025] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:22,997 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:22,997 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:22,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654204993] [2022-07-19 11:12:22,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:23,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:23,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:23,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:23,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:23,021 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:23,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:23,784 INFO L93 Difference]: Finished difference Result 824 states and 1460 transitions. [2022-07-19 11:12:23,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:23,786 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 152 [2022-07-19 11:12:23,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:23,801 INFO L225 Difference]: With dead ends: 824 [2022-07-19 11:12:23,802 INFO L226 Difference]: Without dead ends: 445 [2022-07-19 11:12:23,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:23,811 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 78 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 658 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 658 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:23,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 247 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 658 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-19 11:12:23,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-07-19 11:12:23,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 444. [2022-07-19 11:12:23,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.417607223476298) internal successors, (628), 443 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:23,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 628 transitions. [2022-07-19 11:12:23,859 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 628 transitions. Word has length 152 [2022-07-19 11:12:23,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:23,859 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 628 transitions. [2022-07-19 11:12:23,860 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:23,860 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 628 transitions. [2022-07-19 11:12:23,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-07-19 11:12:23,863 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:23,863 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:23,864 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-19 11:12:23,864 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:23,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:23,864 INFO L85 PathProgramCache]: Analyzing trace with hash 233587009, now seen corresponding path program 1 times [2022-07-19 11:12:23,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:23,865 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136666599] [2022-07-19 11:12:23,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:23,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:23,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:23,948 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:12:23,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:23,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136666599] [2022-07-19 11:12:23,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136666599] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:23,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:23,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:23,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391001119] [2022-07-19 11:12:23,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:23,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:23,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:23,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:23,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:23,951 INFO L87 Difference]: Start difference. First operand 444 states and 628 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:24,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:24,564 INFO L93 Difference]: Finished difference Result 1313 states and 1864 transitions. [2022-07-19 11:12:24,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:24,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2022-07-19 11:12:24,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:24,568 INFO L225 Difference]: With dead ends: 1313 [2022-07-19 11:12:24,568 INFO L226 Difference]: Without dead ends: 871 [2022-07-19 11:12:24,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:24,569 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 249 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 584 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:24,570 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 90 Invalid, 779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 584 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:12:24,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2022-07-19 11:12:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 857. [2022-07-19 11:12:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 1.3843457943925233) internal successors, (1185), 856 states have internal predecessors, (1185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:24,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 1185 transitions. [2022-07-19 11:12:24,585 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 1185 transitions. Word has length 160 [2022-07-19 11:12:24,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:24,586 INFO L495 AbstractCegarLoop]: Abstraction has 857 states and 1185 transitions. [2022-07-19 11:12:24,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:24,586 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 1185 transitions. [2022-07-19 11:12:24,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-19 11:12:24,588 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:24,589 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:24,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-19 11:12:24,589 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:24,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:24,590 INFO L85 PathProgramCache]: Analyzing trace with hash 651701228, now seen corresponding path program 1 times [2022-07-19 11:12:24,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:24,590 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313541979] [2022-07-19 11:12:24,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:24,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:12:24,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:24,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313541979] [2022-07-19 11:12:24,727 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313541979] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:24,727 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:24,727 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:24,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863041463] [2022-07-19 11:12:24,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:24,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:24,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:24,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:24,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:24,729 INFO L87 Difference]: Start difference. First operand 857 states and 1185 transitions. Second operand has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:25,305 INFO L93 Difference]: Finished difference Result 2130 states and 3052 transitions. [2022-07-19 11:12:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:25,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 167 [2022-07-19 11:12:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:25,310 INFO L225 Difference]: With dead ends: 2130 [2022-07-19 11:12:25,310 INFO L226 Difference]: Without dead ends: 1275 [2022-07-19 11:12:25,311 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:25,312 INFO L413 NwaCegarLoop]: 320 mSDtfsCounter, 126 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:25,312 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 346 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:25,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1275 states. [2022-07-19 11:12:25,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1275 to 1273. [2022-07-19 11:12:25,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1273 states, 1272 states have (on average 1.395440251572327) internal successors, (1775), 1272 states have internal predecessors, (1775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:25,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1273 states to 1273 states and 1775 transitions. [2022-07-19 11:12:25,328 INFO L78 Accepts]: Start accepts. Automaton has 1273 states and 1775 transitions. Word has length 167 [2022-07-19 11:12:25,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:25,328 INFO L495 AbstractCegarLoop]: Abstraction has 1273 states and 1775 transitions. [2022-07-19 11:12:25,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.0) internal successors, (162), 3 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:25,329 INFO L276 IsEmpty]: Start isEmpty. Operand 1273 states and 1775 transitions. [2022-07-19 11:12:25,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-07-19 11:12:25,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:25,347 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:25,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-19 11:12:25,348 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:25,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:25,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1455733754, now seen corresponding path program 1 times [2022-07-19 11:12:25,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:25,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518688802] [2022-07-19 11:12:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:25,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:25,400 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:12:25,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:25,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518688802] [2022-07-19 11:12:25,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518688802] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:25,401 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:25,401 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:25,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467093155] [2022-07-19 11:12:25,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:25,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:25,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:25,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:25,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:25,402 INFO L87 Difference]: Start difference. First operand 1273 states and 1775 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:25,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:25,982 INFO L93 Difference]: Finished difference Result 3774 states and 5271 transitions. [2022-07-19 11:12:25,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:25,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2022-07-19 11:12:25,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:25,990 INFO L225 Difference]: With dead ends: 3774 [2022-07-19 11:12:25,990 INFO L226 Difference]: Without dead ends: 2503 [2022-07-19 11:12:25,994 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:26,000 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 216 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 365 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:26,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 365 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:26,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2503 states. [2022-07-19 11:12:26,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2503 to 2499. [2022-07-19 11:12:26,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2499 states, 2498 states have (on average 1.3062449959967974) internal successors, (3263), 2498 states have internal predecessors, (3263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:26,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2499 states to 2499 states and 3263 transitions. [2022-07-19 11:12:26,050 INFO L78 Accepts]: Start accepts. Automaton has 2499 states and 3263 transitions. Word has length 173 [2022-07-19 11:12:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:26,050 INFO L495 AbstractCegarLoop]: Abstraction has 2499 states and 3263 transitions. [2022-07-19 11:12:26,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2499 states and 3263 transitions. [2022-07-19 11:12:26,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-07-19 11:12:26,054 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:26,054 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:26,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-19 11:12:26,055 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:26,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1109508564, now seen corresponding path program 1 times [2022-07-19 11:12:26,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:26,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906909060] [2022-07-19 11:12:26,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:26,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-19 11:12:26,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:26,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906909060] [2022-07-19 11:12:26,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906909060] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:26,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:26,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:26,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183040830] [2022-07-19 11:12:26,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:26,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:26,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:26,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:26,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:26,151 INFO L87 Difference]: Start difference. First operand 2499 states and 3263 transitions. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:26,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:26,755 INFO L93 Difference]: Finished difference Result 5818 states and 7631 transitions. [2022-07-19 11:12:26,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:26,756 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 180 [2022-07-19 11:12:26,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:26,765 INFO L225 Difference]: With dead ends: 5818 [2022-07-19 11:12:26,765 INFO L226 Difference]: Without dead ends: 3321 [2022-07-19 11:12:26,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:26,770 INFO L413 NwaCegarLoop]: 343 mSDtfsCounter, 214 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:26,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 364 Invalid, 725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:12:26,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2022-07-19 11:12:26,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 3312. [2022-07-19 11:12:26,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3312 states, 3311 states have (on average 1.266384778012685) internal successors, (4193), 3311 states have internal predecessors, (4193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:26,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3312 states to 3312 states and 4193 transitions. [2022-07-19 11:12:26,817 INFO L78 Accepts]: Start accepts. Automaton has 3312 states and 4193 transitions. Word has length 180 [2022-07-19 11:12:26,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:26,818 INFO L495 AbstractCegarLoop]: Abstraction has 3312 states and 4193 transitions. [2022-07-19 11:12:26,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:26,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3312 states and 4193 transitions. [2022-07-19 11:12:26,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-19 11:12:26,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:26,825 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:26,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-19 11:12:26,826 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:26,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:26,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1324416253, now seen corresponding path program 1 times [2022-07-19 11:12:26,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:26,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658317633] [2022-07-19 11:12:26,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:26,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 11:12:26,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:26,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658317633] [2022-07-19 11:12:26,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658317633] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:26,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:26,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:26,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514826112] [2022-07-19 11:12:26,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:26,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:26,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:26,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:26,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:26,908 INFO L87 Difference]: Start difference. First operand 3312 states and 4193 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:27,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:27,549 INFO L93 Difference]: Finished difference Result 8881 states and 11393 transitions. [2022-07-19 11:12:27,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:27,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 195 [2022-07-19 11:12:27,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:27,563 INFO L225 Difference]: With dead ends: 8881 [2022-07-19 11:12:27,564 INFO L226 Difference]: Without dead ends: 5571 [2022-07-19 11:12:27,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:27,569 INFO L413 NwaCegarLoop]: 210 mSDtfsCounter, 211 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:27,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [211 Valid, 238 Invalid, 800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:12:27,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2022-07-19 11:12:27,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5551. [2022-07-19 11:12:27,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5551 states, 5550 states have (on average 1.2855855855855856) internal successors, (7135), 5550 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:27,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5551 states to 5551 states and 7135 transitions. [2022-07-19 11:12:27,645 INFO L78 Accepts]: Start accepts. Automaton has 5551 states and 7135 transitions. Word has length 195 [2022-07-19 11:12:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:27,645 INFO L495 AbstractCegarLoop]: Abstraction has 5551 states and 7135 transitions. [2022-07-19 11:12:27,645 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 2 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:27,646 INFO L276 IsEmpty]: Start isEmpty. Operand 5551 states and 7135 transitions. [2022-07-19 11:12:27,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-07-19 11:12:27,651 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:27,652 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:27,652 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-19 11:12:27,652 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:27,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1341529967, now seen corresponding path program 1 times [2022-07-19 11:12:27,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:27,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450928864] [2022-07-19 11:12:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:27,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:27,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:27,730 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-19 11:12:27,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:27,731 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450928864] [2022-07-19 11:12:27,731 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450928864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:27,731 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:27,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:27,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657905766] [2022-07-19 11:12:27,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:27,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:12:27,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:27,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:12:27,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:12:27,732 INFO L87 Difference]: Start difference. First operand 5551 states and 7135 transitions. Second operand has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:28,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:28,629 INFO L93 Difference]: Finished difference Result 10714 states and 13855 transitions. [2022-07-19 11:12:28,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:12:28,630 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 196 [2022-07-19 11:12:28,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:28,643 INFO L225 Difference]: With dead ends: 10714 [2022-07-19 11:12:28,643 INFO L226 Difference]: Without dead ends: 5571 [2022-07-19 11:12:28,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:12:28,648 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 444 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:28,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 122 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 11:12:28,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5571 states. [2022-07-19 11:12:28,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5571 to 5348. [2022-07-19 11:12:28,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5348 states, 5347 states have (on average 1.2870768655320741) internal successors, (6882), 5347 states have internal predecessors, (6882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:28,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5348 states to 5348 states and 6882 transitions. [2022-07-19 11:12:28,716 INFO L78 Accepts]: Start accepts. Automaton has 5348 states and 6882 transitions. Word has length 196 [2022-07-19 11:12:28,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:28,716 INFO L495 AbstractCegarLoop]: Abstraction has 5348 states and 6882 transitions. [2022-07-19 11:12:28,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.0) internal successors, (196), 3 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:28,717 INFO L276 IsEmpty]: Start isEmpty. Operand 5348 states and 6882 transitions. [2022-07-19 11:12:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-19 11:12:28,722 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:28,722 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:28,722 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-19 11:12:28,722 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:28,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:28,723 INFO L85 PathProgramCache]: Analyzing trace with hash 221221588, now seen corresponding path program 1 times [2022-07-19 11:12:28,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:28,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694580339] [2022-07-19 11:12:28,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:28,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:28,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:28,773 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 11:12:28,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:28,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694580339] [2022-07-19 11:12:28,774 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694580339] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:28,774 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:28,774 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:28,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013043101] [2022-07-19 11:12:28,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:28,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:28,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:28,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:28,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:28,776 INFO L87 Difference]: Start difference. First operand 5348 states and 6882 transitions. Second operand has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:29,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:29,386 INFO L93 Difference]: Finished difference Result 14176 states and 18488 transitions. [2022-07-19 11:12:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:29,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2022-07-19 11:12:29,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:29,434 INFO L225 Difference]: With dead ends: 14176 [2022-07-19 11:12:29,434 INFO L226 Difference]: Without dead ends: 9236 [2022-07-19 11:12:29,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:29,442 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 219 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 669 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:29,442 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [219 Valid, 168 Invalid, 769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 669 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:29,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9236 states. [2022-07-19 11:12:29,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9236 to 9226. [2022-07-19 11:12:29,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9226 states, 9225 states have (on average 1.272411924119241) internal successors, (11738), 9225 states have internal predecessors, (11738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9226 states to 9226 states and 11738 transitions. [2022-07-19 11:12:29,593 INFO L78 Accepts]: Start accepts. Automaton has 9226 states and 11738 transitions. Word has length 199 [2022-07-19 11:12:29,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:29,593 INFO L495 AbstractCegarLoop]: Abstraction has 9226 states and 11738 transitions. [2022-07-19 11:12:29,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.666666666666664) internal successors, (182), 2 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:29,594 INFO L276 IsEmpty]: Start isEmpty. Operand 9226 states and 11738 transitions. [2022-07-19 11:12:29,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-19 11:12:29,603 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:29,603 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:29,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-19 11:12:29,605 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:29,605 INFO L85 PathProgramCache]: Analyzing trace with hash 399462554, now seen corresponding path program 1 times [2022-07-19 11:12:29,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:29,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674626565] [2022-07-19 11:12:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:29,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 56 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-07-19 11:12:29,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:29,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674626565] [2022-07-19 11:12:29,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674626565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:29,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415974509] [2022-07-19 11:12:29,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:29,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:29,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:29,712 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 11:12:29,741 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 11:12:29,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:29,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:12:29,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2022-07-19 11:12:30,124 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:30,124 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415974509] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:30,124 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:30,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2022-07-19 11:12:30,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595826283] [2022-07-19 11:12:30,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:30,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:30,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:30,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:30,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:30,125 INFO L87 Difference]: Start difference. First operand 9226 states and 11738 transitions. Second operand has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:30,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:30,740 INFO L93 Difference]: Finished difference Result 18272 states and 23302 transitions. [2022-07-19 11:12:30,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:30,740 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 203 [2022-07-19 11:12:30,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:30,768 INFO L225 Difference]: With dead ends: 18272 [2022-07-19 11:12:30,768 INFO L226 Difference]: Without dead ends: 9048 [2022-07-19 11:12:30,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-07-19 11:12:30,799 INFO L413 NwaCegarLoop]: 328 mSDtfsCounter, 86 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:30,800 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 350 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9048 states. [2022-07-19 11:12:30,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9048 to 9023. [2022-07-19 11:12:30,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9023 states, 9022 states have (on average 1.2631345599645312) internal successors, (11396), 9022 states have internal predecessors, (11396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:30,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9023 states to 9023 states and 11396 transitions. [2022-07-19 11:12:30,915 INFO L78 Accepts]: Start accepts. Automaton has 9023 states and 11396 transitions. Word has length 203 [2022-07-19 11:12:30,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:30,916 INFO L495 AbstractCegarLoop]: Abstraction has 9023 states and 11396 transitions. [2022-07-19 11:12:30,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.0) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:30,916 INFO L276 IsEmpty]: Start isEmpty. Operand 9023 states and 11396 transitions. [2022-07-19 11:12:30,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2022-07-19 11:12:30,926 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:30,926 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:30,968 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-19 11:12:31,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:31,171 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:31,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1333067857, now seen corresponding path program 1 times [2022-07-19 11:12:31,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:31,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181682799] [2022-07-19 11:12:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:31,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:31,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:31,246 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-07-19 11:12:31,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181682799] [2022-07-19 11:12:31,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181682799] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:31,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819643925] [2022-07-19 11:12:31,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:31,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:31,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:31,264 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 11:12:31,266 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 11:12:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:31,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 11:12:31,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:31,670 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 11:12:31,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-19 11:12:31,869 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 93 proven. 26 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 11:12:31,869 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819643925] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-19 11:12:31,869 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-19 11:12:31,869 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2022-07-19 11:12:31,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962959036] [2022-07-19 11:12:31,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-19 11:12:31,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-19 11:12:31,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:31,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-19 11:12:31,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:31,870 INFO L87 Difference]: Start difference. First operand 9023 states and 11396 transitions. Second operand has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:35,024 INFO L93 Difference]: Finished difference Result 50965 states and 65536 transitions. [2022-07-19 11:12:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-19 11:12:35,025 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2022-07-19 11:12:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:35,092 INFO L225 Difference]: With dead ends: 50965 [2022-07-19 11:12:35,093 INFO L226 Difference]: Without dead ends: 42350 [2022-07-19 11:12:35,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 478 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-07-19 11:12:35,109 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 2714 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 3887 mSolverCounterSat, 1047 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2714 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 4934 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1047 IncrementalHoareTripleChecker+Valid, 3887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:35,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2714 Valid, 339 Invalid, 4934 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1047 Valid, 3887 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-07-19 11:12:35,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42350 states. [2022-07-19 11:12:35,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42350 to 42295. [2022-07-19 11:12:35,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42295 states, 42294 states have (on average 1.2161772355416844) internal successors, (51437), 42294 states have internal predecessors, (51437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:35,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42295 states to 42295 states and 51437 transitions. [2022-07-19 11:12:35,815 INFO L78 Accepts]: Start accepts. Automaton has 42295 states and 51437 transitions. Word has length 237 [2022-07-19 11:12:35,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:35,815 INFO L495 AbstractCegarLoop]: Abstraction has 42295 states and 51437 transitions. [2022-07-19 11:12:35,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.0) internal successors, (390), 6 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 42295 states and 51437 transitions. [2022-07-19 11:12:35,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-07-19 11:12:35,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:35,844 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:35,863 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 11:12:36,060 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,SelfDestructingSolverStorable9 [2022-07-19 11:12:36,061 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:36,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:36,061 INFO L85 PathProgramCache]: Analyzing trace with hash -879094002, now seen corresponding path program 1 times [2022-07-19 11:12:36,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:36,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403768077] [2022-07-19 11:12:36,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:36,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:36,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:36,271 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 11:12:36,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:36,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403768077] [2022-07-19 11:12:36,271 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403768077] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:36,272 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:36,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:36,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025937459] [2022-07-19 11:12:36,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:36,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:12:36,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:36,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:12:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:12:36,274 INFO L87 Difference]: Start difference. First operand 42295 states and 51437 transitions. Second operand has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:37,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:37,106 INFO L93 Difference]: Finished difference Result 79779 states and 97309 transitions. [2022-07-19 11:12:37,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:12:37,106 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2022-07-19 11:12:37,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:37,166 INFO L225 Difference]: With dead ends: 79779 [2022-07-19 11:12:37,167 INFO L226 Difference]: Without dead ends: 38095 [2022-07-19 11:12:37,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:12:37,203 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 460 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 790 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:37,203 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 55 Invalid, 921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 790 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:37,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38095 states. [2022-07-19 11:12:37,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38095 to 36877. [2022-07-19 11:12:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36877 states, 36876 states have (on average 1.1884423473261743) internal successors, (43825), 36876 states have internal predecessors, (43825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:37,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36877 states to 36877 states and 43825 transitions. [2022-07-19 11:12:37,778 INFO L78 Accepts]: Start accepts. Automaton has 36877 states and 43825 transitions. Word has length 254 [2022-07-19 11:12:37,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:37,778 INFO L495 AbstractCegarLoop]: Abstraction has 36877 states and 43825 transitions. [2022-07-19 11:12:37,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.0) internal successors, (208), 3 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:37,779 INFO L276 IsEmpty]: Start isEmpty. Operand 36877 states and 43825 transitions. [2022-07-19 11:12:37,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-07-19 11:12:37,800 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:37,801 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:37,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-19 11:12:37,801 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:37,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:37,802 INFO L85 PathProgramCache]: Analyzing trace with hash 222566490, now seen corresponding path program 1 times [2022-07-19 11:12:37,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:37,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158698381] [2022-07-19 11:12:37,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:37,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:37,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:37,940 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 98 proven. 0 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2022-07-19 11:12:37,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:37,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158698381] [2022-07-19 11:12:37,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158698381] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:37,941 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:37,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:37,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476625350] [2022-07-19 11:12:37,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:37,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:37,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:37,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:37,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:37,943 INFO L87 Difference]: Start difference. First operand 36877 states and 43825 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:38,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:38,808 INFO L93 Difference]: Finished difference Result 89218 states and 106693 transitions. [2022-07-19 11:12:38,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:38,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 254 [2022-07-19 11:12:38,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:38,882 INFO L225 Difference]: With dead ends: 89218 [2022-07-19 11:12:38,882 INFO L226 Difference]: Without dead ends: 52952 [2022-07-19 11:12:38,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:38,906 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 224 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:38,906 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [224 Valid, 119 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:38,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52952 states. [2022-07-19 11:12:39,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52952 to 52946. [2022-07-19 11:12:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52946 states, 52945 states have (on average 1.1929171782037964) internal successors, (63159), 52945 states have internal predecessors, (63159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52946 states to 52946 states and 63159 transitions. [2022-07-19 11:12:39,607 INFO L78 Accepts]: Start accepts. Automaton has 52946 states and 63159 transitions. Word has length 254 [2022-07-19 11:12:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:39,607 INFO L495 AbstractCegarLoop]: Abstraction has 52946 states and 63159 transitions. [2022-07-19 11:12:39,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:39,608 INFO L276 IsEmpty]: Start isEmpty. Operand 52946 states and 63159 transitions. [2022-07-19 11:12:39,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-07-19 11:12:39,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:39,630 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:39,630 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-19 11:12:39,630 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:39,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:39,631 INFO L85 PathProgramCache]: Analyzing trace with hash -52091255, now seen corresponding path program 1 times [2022-07-19 11:12:39,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:39,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528714063] [2022-07-19 11:12:39,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:39,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:39,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:39,703 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 118 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-07-19 11:12:39,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:39,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528714063] [2022-07-19 11:12:39,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528714063] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:39,704 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:39,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:39,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280326476] [2022-07-19 11:12:39,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:39,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:39,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:39,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:39,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:39,706 INFO L87 Difference]: Start difference. First operand 52946 states and 63159 transitions. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:40,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:40,655 INFO L93 Difference]: Finished difference Result 119085 states and 143041 transitions. [2022-07-19 11:12:40,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:40,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 266 [2022-07-19 11:12:40,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:40,868 INFO L225 Difference]: With dead ends: 119085 [2022-07-19 11:12:40,868 INFO L226 Difference]: Without dead ends: 67765 [2022-07-19 11:12:40,914 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:40,916 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 140 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:40,916 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [140 Valid, 152 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:41,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67765 states. [2022-07-19 11:12:41,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67765 to 67765. [2022-07-19 11:12:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67765 states, 67764 states have (on average 1.1491942624402338) internal successors, (77874), 67764 states have internal predecessors, (77874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:41,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67765 states to 67765 states and 77874 transitions. [2022-07-19 11:12:41,821 INFO L78 Accepts]: Start accepts. Automaton has 67765 states and 77874 transitions. Word has length 266 [2022-07-19 11:12:41,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:41,822 INFO L495 AbstractCegarLoop]: Abstraction has 67765 states and 77874 transitions. [2022-07-19 11:12:41,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 2 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:41,822 INFO L276 IsEmpty]: Start isEmpty. Operand 67765 states and 77874 transitions. [2022-07-19 11:12:41,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-07-19 11:12:41,843 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:41,843 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:41,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-19 11:12:41,844 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:41,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:41,844 INFO L85 PathProgramCache]: Analyzing trace with hash 1098622564, now seen corresponding path program 1 times [2022-07-19 11:12:41,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:41,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74632976] [2022-07-19 11:12:41,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:41,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:41,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 159 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 11:12:41,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:41,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74632976] [2022-07-19 11:12:41,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74632976] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:41,939 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:41,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:41,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58546870] [2022-07-19 11:12:41,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:41,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:41,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:41,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:41,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:41,941 INFO L87 Difference]: Start difference. First operand 67765 states and 77874 transitions. Second operand has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:42,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:42,803 INFO L93 Difference]: Finished difference Result 116617 states and 133672 transitions. [2022-07-19 11:12:42,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:42,803 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2022-07-19 11:12:42,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:42,889 INFO L225 Difference]: With dead ends: 116617 [2022-07-19 11:12:42,889 INFO L226 Difference]: Without dead ends: 69795 [2022-07-19 11:12:42,931 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:42,931 INFO L413 NwaCegarLoop]: 342 mSDtfsCounter, 161 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:42,932 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 359 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:12:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69795 states. [2022-07-19 11:12:43,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69795 to 69795. [2022-07-19 11:12:43,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69795 states, 69794 states have (on average 1.1438232512823452) internal successors, (79832), 69794 states have internal predecessors, (79832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69795 states to 69795 states and 79832 transitions. [2022-07-19 11:12:43,798 INFO L78 Accepts]: Start accepts. Automaton has 69795 states and 79832 transitions. Word has length 268 [2022-07-19 11:12:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:43,798 INFO L495 AbstractCegarLoop]: Abstraction has 69795 states and 79832 transitions. [2022-07-19 11:12:43,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 74.0) internal successors, (222), 3 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 69795 states and 79832 transitions. [2022-07-19 11:12:43,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2022-07-19 11:12:43,818 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:43,818 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:43,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-19 11:12:43,819 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:43,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:43,819 INFO L85 PathProgramCache]: Analyzing trace with hash -170040178, now seen corresponding path program 1 times [2022-07-19 11:12:43,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:43,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712106536] [2022-07-19 11:12:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:43,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:43,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:44,018 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-19 11:12:44,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:44,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712106536] [2022-07-19 11:12:44,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712106536] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:44,019 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:44,019 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:44,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929874688] [2022-07-19 11:12:44,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:44,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:44,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:44,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:44,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:44,020 INFO L87 Difference]: Start difference. First operand 69795 states and 79832 transitions. Second operand has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:44,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:44,992 INFO L93 Difference]: Finished difference Result 131685 states and 150641 transitions. [2022-07-19 11:12:44,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:44,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 273 [2022-07-19 11:12:44,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:45,097 INFO L225 Difference]: With dead ends: 131685 [2022-07-19 11:12:45,097 INFO L226 Difference]: Without dead ends: 83239 [2022-07-19 11:12:45,124 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:45,124 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 160 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 696 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 706 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 696 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:45,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 170 Invalid, 706 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 696 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:45,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83239 states. [2022-07-19 11:12:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83239 to 76709. [2022-07-19 11:12:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76709 states, 76708 states have (on average 1.151314074151327) internal successors, (88315), 76708 states have internal predecessors, (88315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:46,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76709 states to 76709 states and 88315 transitions. [2022-07-19 11:12:46,079 INFO L78 Accepts]: Start accepts. Automaton has 76709 states and 88315 transitions. Word has length 273 [2022-07-19 11:12:46,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:46,080 INFO L495 AbstractCegarLoop]: Abstraction has 76709 states and 88315 transitions. [2022-07-19 11:12:46,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 77.33333333333333) internal successors, (232), 2 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:46,080 INFO L276 IsEmpty]: Start isEmpty. Operand 76709 states and 88315 transitions. [2022-07-19 11:12:46,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-07-19 11:12:46,102 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:46,102 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:46,102 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-07-19 11:12:46,103 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:46,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:46,103 INFO L85 PathProgramCache]: Analyzing trace with hash -752188596, now seen corresponding path program 1 times [2022-07-19 11:12:46,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:46,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866243306] [2022-07-19 11:12:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:46,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:46,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 126 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-19 11:12:46,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:46,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866243306] [2022-07-19 11:12:46,183 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866243306] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:46,183 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:46,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:46,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116926286] [2022-07-19 11:12:46,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:46,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:46,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:46,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:46,185 INFO L87 Difference]: Start difference. First operand 76709 states and 88315 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:47,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:47,056 INFO L93 Difference]: Finished difference Result 151387 states and 174442 transitions. [2022-07-19 11:12:47,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:47,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 280 [2022-07-19 11:12:47,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:47,142 INFO L225 Difference]: With dead ends: 151387 [2022-07-19 11:12:47,142 INFO L226 Difference]: Without dead ends: 76710 [2022-07-19 11:12:47,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:47,189 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 133 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:47,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 151 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-19 11:12:47,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76710 states. [2022-07-19 11:12:48,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76710 to 76709. [2022-07-19 11:12:48,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76709 states, 76708 states have (on average 1.1512749648015852) internal successors, (88312), 76708 states have internal predecessors, (88312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:48,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76709 states to 76709 states and 88312 transitions. [2022-07-19 11:12:48,370 INFO L78 Accepts]: Start accepts. Automaton has 76709 states and 88312 transitions. Word has length 280 [2022-07-19 11:12:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:48,370 INFO L495 AbstractCegarLoop]: Abstraction has 76709 states and 88312 transitions. [2022-07-19 11:12:48,370 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 2 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand 76709 states and 88312 transitions. [2022-07-19 11:12:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-07-19 11:12:48,397 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:48,397 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:48,397 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-07-19 11:12:48,398 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:48,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:48,398 INFO L85 PathProgramCache]: Analyzing trace with hash -428999522, now seen corresponding path program 1 times [2022-07-19 11:12:48,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:48,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465537267] [2022-07-19 11:12:48,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:48,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:48,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:48,555 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-19 11:12:48,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:48,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465537267] [2022-07-19 11:12:48,555 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465537267] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:48,555 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:48,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:12:48,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808340295] [2022-07-19 11:12:48,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:48,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:12:48,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:48,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:12:48,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:12:48,557 INFO L87 Difference]: Start difference. First operand 76709 states and 88312 transitions. Second operand has 4 states, 4 states have (on average 64.0) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:50,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:50,042 INFO L93 Difference]: Finished difference Result 159579 states and 184201 transitions. [2022-07-19 11:12:50,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:12:50,043 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 294 [2022-07-19 11:12:50,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:50,172 INFO L225 Difference]: With dead ends: 159579 [2022-07-19 11:12:50,172 INFO L226 Difference]: Without dead ends: 84902 [2022-07-19 11:12:50,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:12:50,191 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 373 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 1308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:50,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [373 Valid, 86 Invalid, 1308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-19 11:12:50,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84902 states. [2022-07-19 11:12:50,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84902 to 81400. [2022-07-19 11:12:51,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81400 states, 81399 states have (on average 1.1520043243774494) internal successors, (93772), 81399 states have internal predecessors, (93772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:51,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81400 states to 81400 states and 93772 transitions. [2022-07-19 11:12:51,130 INFO L78 Accepts]: Start accepts. Automaton has 81400 states and 93772 transitions. Word has length 294 [2022-07-19 11:12:51,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:51,130 INFO L495 AbstractCegarLoop]: Abstraction has 81400 states and 93772 transitions. [2022-07-19 11:12:51,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 64.0) internal successors, (256), 3 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:51,131 INFO L276 IsEmpty]: Start isEmpty. Operand 81400 states and 93772 transitions. [2022-07-19 11:12:51,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-07-19 11:12:51,160 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:51,160 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:51,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-07-19 11:12:51,160 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:51,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:51,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1433879905, now seen corresponding path program 1 times [2022-07-19 11:12:51,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:51,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474915565] [2022-07-19 11:12:51,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:51,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 298 backedges. 141 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2022-07-19 11:12:51,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:51,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474915565] [2022-07-19 11:12:51,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474915565] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:51,228 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:51,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:51,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709908988] [2022-07-19 11:12:51,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:51,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:51,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:51,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:51,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:51,230 INFO L87 Difference]: Start difference. First operand 81400 states and 93772 transitions. Second operand has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:52,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:52,414 INFO L93 Difference]: Finished difference Result 181528 states and 209177 transitions. [2022-07-19 11:12:52,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:52,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 304 [2022-07-19 11:12:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:52,541 INFO L225 Difference]: With dead ends: 181528 [2022-07-19 11:12:52,541 INFO L226 Difference]: Without dead ends: 102160 [2022-07-19 11:12:52,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:52,580 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 208 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 700 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 700 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:52,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 179 Invalid, 721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 700 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102160 states. [2022-07-19 11:12:53,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102160 to 102150. [2022-07-19 11:12:53,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102150 states, 102149 states have (on average 1.1487826606232072) internal successors, (117347), 102149 states have internal predecessors, (117347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:54,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102150 states to 102150 states and 117347 transitions. [2022-07-19 11:12:54,043 INFO L78 Accepts]: Start accepts. Automaton has 102150 states and 117347 transitions. Word has length 304 [2022-07-19 11:12:54,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:54,043 INFO L495 AbstractCegarLoop]: Abstraction has 102150 states and 117347 transitions. [2022-07-19 11:12:54,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.66666666666667) internal successors, (209), 2 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:54,043 INFO L276 IsEmpty]: Start isEmpty. Operand 102150 states and 117347 transitions. [2022-07-19 11:12:54,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2022-07-19 11:12:54,078 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:54,078 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:54,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-07-19 11:12:54,079 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:54,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:54,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1079103819, now seen corresponding path program 1 times [2022-07-19 11:12:54,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:54,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275515926] [2022-07-19 11:12:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:54,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:54,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:54,479 INFO L134 CoverageAnalysis]: Checked inductivity of 237 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-19 11:12:54,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:54,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275515926] [2022-07-19 11:12:54,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275515926] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:54,480 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:12:54,480 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-19 11:12:54,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990887891] [2022-07-19 11:12:54,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:54,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:54,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:54,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:54,482 INFO L87 Difference]: Start difference. First operand 102150 states and 117347 transitions. Second operand has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 2 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:55,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:55,271 INFO L93 Difference]: Finished difference Result 179901 states and 206547 transitions. [2022-07-19 11:12:55,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:55,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 2 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 337 [2022-07-19 11:12:55,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:55,399 INFO L225 Difference]: With dead ends: 179901 [2022-07-19 11:12:55,399 INFO L226 Difference]: Without dead ends: 102151 [2022-07-19 11:12:55,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:12:55,453 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 70 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:55,453 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 150 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 11:12:55,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102151 states. [2022-07-19 11:12:56,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102151 to 102150. [2022-07-19 11:12:56,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102150 states, 102149 states have (on average 1.1487043436548572) internal successors, (117339), 102149 states have internal predecessors, (117339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:56,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102150 states to 102150 states and 117339 transitions. [2022-07-19 11:12:56,981 INFO L78 Accepts]: Start accepts. Automaton has 102150 states and 117339 transitions. Word has length 337 [2022-07-19 11:12:56,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:12:56,982 INFO L495 AbstractCegarLoop]: Abstraction has 102150 states and 117339 transitions. [2022-07-19 11:12:56,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.66666666666667) internal successors, (296), 2 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:56,982 INFO L276 IsEmpty]: Start isEmpty. Operand 102150 states and 117339 transitions. [2022-07-19 11:12:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2022-07-19 11:12:57,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:12:57,012 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:12:57,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-19 11:12:57,013 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:12:57,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:12:57,013 INFO L85 PathProgramCache]: Analyzing trace with hash 251001855, now seen corresponding path program 1 times [2022-07-19 11:12:57,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:12:57,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122752393] [2022-07-19 11:12:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:57,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:12:57,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:57,122 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 213 proven. 9 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2022-07-19 11:12:57,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:12:57,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122752393] [2022-07-19 11:12:57,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122752393] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:12:57,123 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777987911] [2022-07-19 11:12:57,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:12:57,123 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:12:57,124 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:12:57,125 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 11:12:57,126 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 11:12:57,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:12:57,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:12:57,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:12:57,447 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 204 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-07-19 11:12:57,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:12:57,447 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777987911] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:12:57,447 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:12:57,447 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 11:12:57,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716022477] [2022-07-19 11:12:57,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:12:57,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:12:57,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:12:57,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:12:57,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:57,449 INFO L87 Difference]: Start difference. First operand 102150 states and 117339 transitions. Second operand has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:12:58,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:12:58,589 INFO L93 Difference]: Finished difference Result 199204 states and 229907 transitions. [2022-07-19 11:12:58,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:12:58,589 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2022-07-19 11:12:58,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:12:58,758 INFO L225 Difference]: With dead ends: 199204 [2022-07-19 11:12:58,758 INFO L226 Difference]: Without dead ends: 121454 [2022-07-19 11:12:58,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 344 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:12:58,823 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 98 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:12:58,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 292 Invalid, 666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:12:58,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121454 states. [2022-07-19 11:13:00,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121454 to 117375. [2022-07-19 11:13:00,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117375 states, 117374 states have (on average 1.155801114386491) internal successors, (135661), 117374 states have internal predecessors, (135661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:00,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117375 states to 117375 states and 135661 transitions. [2022-07-19 11:13:00,462 INFO L78 Accepts]: Start accepts. Automaton has 117375 states and 135661 transitions. Word has length 345 [2022-07-19 11:13:00,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:00,462 INFO L495 AbstractCegarLoop]: Abstraction has 117375 states and 135661 transitions. [2022-07-19 11:13:00,463 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:00,463 INFO L276 IsEmpty]: Start isEmpty. Operand 117375 states and 135661 transitions. [2022-07-19 11:13:00,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2022-07-19 11:13:00,499 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:00,500 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:00,518 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 11:13:00,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:00,718 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:00,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:00,718 INFO L85 PathProgramCache]: Analyzing trace with hash 451988262, now seen corresponding path program 1 times [2022-07-19 11:13:00,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:00,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642702352] [2022-07-19 11:13:00,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:00,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:01,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 233 proven. 9 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-07-19 11:13:01,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:01,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642702352] [2022-07-19 11:13:01,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642702352] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:13:01,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033424871] [2022-07-19 11:13:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:01,405 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:01,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:13:01,406 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 11:13:01,407 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 11:13:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:01,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:13:01,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:13:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 289 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2022-07-19 11:13:01,602 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:13:01,602 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033424871] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:01,602 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:13:01,602 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2022-07-19 11:13:01,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436401701] [2022-07-19 11:13:01,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:01,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:01,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:01,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:01,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:13:01,604 INFO L87 Difference]: Start difference. First operand 117375 states and 135661 transitions. Second operand has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:02,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:02,639 INFO L93 Difference]: Finished difference Result 257980 states and 298859 transitions. [2022-07-19 11:13:02,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:02,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 365 [2022-07-19 11:13:02,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:02,811 INFO L225 Difference]: With dead ends: 257980 [2022-07-19 11:13:02,811 INFO L226 Difference]: Without dead ends: 143449 [2022-07-19 11:13:03,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 364 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:13:03,156 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 202 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:03,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 101 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:13:03,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143449 states. [2022-07-19 11:13:04,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143449 to 129792. [2022-07-19 11:13:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129792 states, 129791 states have (on average 1.1417894923376815) internal successors, (148194), 129791 states have internal predecessors, (148194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129792 states to 129792 states and 148194 transitions. [2022-07-19 11:13:04,846 INFO L78 Accepts]: Start accepts. Automaton has 129792 states and 148194 transitions. Word has length 365 [2022-07-19 11:13:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:04,846 INFO L495 AbstractCegarLoop]: Abstraction has 129792 states and 148194 transitions. [2022-07-19 11:13:04,846 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 117.33333333333333) internal successors, (352), 3 states have internal predecessors, (352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 129792 states and 148194 transitions. [2022-07-19 11:13:04,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2022-07-19 11:13:04,886 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:04,886 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:04,904 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 11:13:05,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:05,104 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:05,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:05,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1260477996, now seen corresponding path program 1 times [2022-07-19 11:13:05,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:05,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144555693] [2022-07-19 11:13:05,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:05,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:05,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 271 proven. 0 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2022-07-19 11:13:05,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:05,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144555693] [2022-07-19 11:13:05,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144555693] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:05,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:05,289 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:13:05,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398104035] [2022-07-19 11:13:05,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:05,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:05,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:05,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:05,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:05,290 INFO L87 Difference]: Start difference. First operand 129792 states and 148194 transitions. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:06,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:06,558 INFO L93 Difference]: Finished difference Result 228067 states and 260839 transitions. [2022-07-19 11:13:06,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:06,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 382 [2022-07-19 11:13:06,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:06,666 INFO L225 Difference]: With dead ends: 228067 [2022-07-19 11:13:06,666 INFO L226 Difference]: Without dead ends: 98277 [2022-07-19 11:13:06,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-19 11:13:06,740 INFO L413 NwaCegarLoop]: 358 mSDtfsCounter, 88 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 379 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:06,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 379 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-19 11:13:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98277 states. [2022-07-19 11:13:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98277 to 90754. [2022-07-19 11:13:07,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90754 states, 90753 states have (on average 1.0779147796767048) internal successors, (97824), 90753 states have internal predecessors, (97824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:07,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90754 states to 90754 states and 97824 transitions. [2022-07-19 11:13:07,985 INFO L78 Accepts]: Start accepts. Automaton has 90754 states and 97824 transitions. Word has length 382 [2022-07-19 11:13:07,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:07,985 INFO L495 AbstractCegarLoop]: Abstraction has 90754 states and 97824 transitions. [2022-07-19 11:13:07,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:07,986 INFO L276 IsEmpty]: Start isEmpty. Operand 90754 states and 97824 transitions. [2022-07-19 11:13:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 401 [2022-07-19 11:13:08,010 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:08,010 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:08,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-07-19 11:13:08,011 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:08,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:08,012 INFO L85 PathProgramCache]: Analyzing trace with hash 798316484, now seen corresponding path program 1 times [2022-07-19 11:13:08,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:08,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316578167] [2022-07-19 11:13:08,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:08,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:08,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:08,177 INFO L134 CoverageAnalysis]: Checked inductivity of 587 backedges. 395 proven. 0 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-07-19 11:13:08,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:08,178 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316578167] [2022-07-19 11:13:08,178 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316578167] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:08,178 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-19 11:13:08,178 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-19 11:13:08,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384847874] [2022-07-19 11:13:08,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:08,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-19 11:13:08,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:08,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-19 11:13:08,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:08,180 INFO L87 Difference]: Start difference. First operand 90754 states and 97824 transitions. Second operand has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:09,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:09,553 INFO L93 Difference]: Finished difference Result 211215 states and 227643 transitions. [2022-07-19 11:13:09,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-19 11:13:09,553 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 400 [2022-07-19 11:13:09,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:09,703 INFO L225 Difference]: With dead ends: 211215 [2022-07-19 11:13:09,703 INFO L226 Difference]: Without dead ends: 125135 [2022-07-19 11:13:09,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:09,765 INFO L413 NwaCegarLoop]: 208 mSDtfsCounter, 340 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:09,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [340 Valid, 405 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-07-19 11:13:09,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125135 states. [2022-07-19 11:13:11,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125135 to 119440. [2022-07-19 11:13:11,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119440 states, 119439 states have (on average 1.076733730188632) internal successors, (128604), 119439 states have internal predecessors, (128604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:11,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119440 states to 119440 states and 128604 transitions. [2022-07-19 11:13:11,746 INFO L78 Accepts]: Start accepts. Automaton has 119440 states and 128604 transitions. Word has length 400 [2022-07-19 11:13:11,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:11,746 INFO L495 AbstractCegarLoop]: Abstraction has 119440 states and 128604 transitions. [2022-07-19 11:13:11,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.0) internal successors, (304), 3 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:11,746 INFO L276 IsEmpty]: Start isEmpty. Operand 119440 states and 128604 transitions. [2022-07-19 11:13:11,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-07-19 11:13:11,777 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:11,777 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:11,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-07-19 11:13:11,778 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:11,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:11,778 INFO L85 PathProgramCache]: Analyzing trace with hash -486918447, now seen corresponding path program 1 times [2022-07-19 11:13:11,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:11,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830871836] [2022-07-19 11:13:11,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:11,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 298 proven. 12 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-19 11:13:11,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:11,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830871836] [2022-07-19 11:13:11,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830871836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:13:11,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150732439] [2022-07-19 11:13:11,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:11,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:11,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:13:11,929 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 11:13:11,963 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 11:13:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:12,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 693 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-19 11:13:12,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:13:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 382 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-19 11:13:12,309 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:13:12,309 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150732439] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:12,309 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:13:12,309 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-07-19 11:13:12,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241358852] [2022-07-19 11:13:12,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:12,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:12,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:12,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:12,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:12,311 INFO L87 Difference]: Start difference. First operand 119440 states and 128604 transitions. Second operand has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-19 11:13:13,561 INFO L93 Difference]: Finished difference Result 239533 states and 258096 transitions. [2022-07-19 11:13:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-19 11:13:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 411 [2022-07-19 11:13:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-19 11:13:13,749 INFO L225 Difference]: With dead ends: 239533 [2022-07-19 11:13:13,749 INFO L226 Difference]: Without dead ends: 122124 [2022-07-19 11:13:13,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 411 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-19 11:13:13,803 INFO L413 NwaCegarLoop]: 333 mSDtfsCounter, 136 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-19 11:13:13,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 349 Invalid, 588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 539 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-19 11:13:13,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122124 states. [2022-07-19 11:13:15,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122124 to 117603. [2022-07-19 11:13:15,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117603 states, 117602 states have (on average 1.073221543851295) internal successors, (126213), 117602 states have internal predecessors, (126213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117603 states to 117603 states and 126213 transitions. [2022-07-19 11:13:15,402 INFO L78 Accepts]: Start accepts. Automaton has 117603 states and 126213 transitions. Word has length 411 [2022-07-19 11:13:15,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-19 11:13:15,402 INFO L495 AbstractCegarLoop]: Abstraction has 117603 states and 126213 transitions. [2022-07-19 11:13:15,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 124.33333333333333) internal successors, (373), 3 states have internal predecessors, (373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-19 11:13:15,403 INFO L276 IsEmpty]: Start isEmpty. Operand 117603 states and 126213 transitions. [2022-07-19 11:13:15,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2022-07-19 11:13:15,432 INFO L187 NwaCegarLoop]: Found error trace [2022-07-19 11:13:15,433 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-19 11:13:15,450 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-19 11:13:15,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-07-19 11:13:15,651 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-19 11:13:15,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-19 11:13:15,653 INFO L85 PathProgramCache]: Analyzing trace with hash -2003901746, now seen corresponding path program 1 times [2022-07-19 11:13:15,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-19 11:13:15,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929588308] [2022-07-19 11:13:15,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:15,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-19 11:13:15,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 442 proven. 18 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-19 11:13:15,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-19 11:13:15,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929588308] [2022-07-19 11:13:15,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929588308] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-19 11:13:15,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318332531] [2022-07-19 11:13:15,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-19 11:13:15,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-19 11:13:15,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-19 11:13:15,848 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 11:13:15,850 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 11:13:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-19 11:13:16,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 750 conjuncts, 2 conjunts are in the unsatisfiable core [2022-07-19 11:13:16,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-19 11:13:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 514 backedges. 339 proven. 0 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2022-07-19 11:13:16,202 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-07-19 11:13:16,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318332531] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-19 11:13:16,202 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-07-19 11:13:16,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2022-07-19 11:13:16,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71642123] [2022-07-19 11:13:16,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-19 11:13:16,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-19 11:13:16,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-19 11:13:16,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-19 11:13:16,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-19 11:13:16,204 INFO L87 Difference]: Start difference. First operand 117603 states and 126213 transitions. Second operand has 3 states, 3 states have (on average 94.0) internal successors, (282), 2 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)