./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem11_label11.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 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/Problem11_label11.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 2521d3888c3910ac16b8a52868332f768d7d80524e896b9e06e11f157c249614 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 10:58:08,254 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 10:58:08,255 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 10:58:08,300 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 10:58:08,300 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 10:58:08,301 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 10:58:08,302 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 10:58:08,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 10:58:08,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 10:58:08,319 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 10:58:08,320 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 10:58:08,322 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 10:58:08,322 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 10:58:08,324 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 10:58:08,326 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 10:58:08,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 10:58:08,330 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 10:58:08,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 10:58:08,332 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 10:58:08,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 10:58:08,339 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 10:58:08,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 10:58:08,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 10:58:08,342 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 10:58:08,345 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 10:58:08,346 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 10:58:08,346 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 10:58:08,348 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 10:58:08,348 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 10:58:08,349 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 10:58:08,349 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 10:58:08,350 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 10:58:08,351 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 10:58:08,352 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 10:58:08,353 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 10:58:08,353 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 10:58:08,354 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 10:58:08,354 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 10:58:08,354 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 10:58:08,355 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 10:58:08,356 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 10:58:08,356 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 10:58:08,395 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 10:58:08,395 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 10:58:08,395 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 10:58:08,396 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 10:58:08,396 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 10:58:08,397 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 10:58:08,397 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 10:58:08,397 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 10:58:08,398 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 10:58:08,398 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 10:58:08,399 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 10:58:08,399 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 10:58:08,399 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 10:58:08,399 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 10:58:08,399 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 10:58:08,400 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 10:58:08,400 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 10:58:08,400 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 10:58:08,400 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 10:58:08,400 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 10:58:08,401 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 10:58:08,401 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 10:58:08,401 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 10:58:08,401 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 10:58:08,401 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:58:08,402 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 10:58:08,402 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 10:58:08,402 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 10:58:08,402 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 10:58:08,402 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 10:58:08,403 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 10:58:08,403 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 10:58:08,403 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 10:58:08,403 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 10:58:08,404 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2521d3888c3910ac16b8a52868332f768d7d80524e896b9e06e11f157c249614 [2021-12-21 10:58:08,624 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 10:58:08,649 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 10:58:08,652 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 10:58:08,653 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 10:58:08,654 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 10:58:08,655 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem11_label11.c [2021-12-21 10:58:08,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc4fed84e/921ba8158d204fafa28c99d59f227e33/FLAGae16a84a3 [2021-12-21 10:58:09,202 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 10:58:09,203 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem11_label11.c [2021-12-21 10:58:09,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc4fed84e/921ba8158d204fafa28c99d59f227e33/FLAGae16a84a3 [2021-12-21 10:58:09,499 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cc4fed84e/921ba8158d204fafa28c99d59f227e33 [2021-12-21 10:58:09,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 10:58:09,503 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 10:58:09,505 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 10:58:09,506 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 10:58:09,508 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 10:58:09,509 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:58:09" (1/1) ... [2021-12-21 10:58:09,509 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dadf5fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:09, skipping insertion in model container [2021-12-21 10:58:09,510 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 10:58:09" (1/1) ... [2021-12-21 10:58:09,515 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 10:58:09,566 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 10:58:09,752 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/Problem11_label11.c[8791,8804] [2021-12-21 10:58:09,932 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:58:09,941 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 10:58:09,963 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/Problem11_label11.c[8791,8804] [2021-12-21 10:58:10,069 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 10:58:10,082 INFO L208 MainTranslator]: Completed translation [2021-12-21 10:58:10,082 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:10 WrapperNode [2021-12-21 10:58:10,083 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 10:58:10,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 10:58:10,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 10:58:10,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 10:58:10,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:10" (1/1) ... [2021-12-21 10:58:10,151 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:10" (1/1) ... [2021-12-21 10:58:10,264 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-12-21 10:58:10,265 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 10:58:10,266 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 10:58:10,266 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 10:58:10,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 10:58:10,273 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:10" (1/1) ... [2021-12-21 10:58:10,273 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:10" (1/1) ... [2021-12-21 10:58:10,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:10" (1/1) ... [2021-12-21 10:58:10,289 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:10" (1/1) ... [2021-12-21 10:58:10,322 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:10" (1/1) ... [2021-12-21 10:58:10,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:10" (1/1) ... [2021-12-21 10:58:10,350 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:10" (1/1) ... [2021-12-21 10:58:10,375 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 10:58:10,376 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 10:58:10,377 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 10:58:10,377 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 10:58:10,378 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:10" (1/1) ... [2021-12-21 10:58:10,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 10:58:10,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:10,402 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) [2021-12-21 10:58:10,404 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 [2021-12-21 10:58:10,432 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 10:58:10,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 10:58:10,433 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 10:58:10,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 10:58:10,483 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 10:58:10,485 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 10:58:11,745 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 10:58:11,759 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 10:58:11,760 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 10:58:11,762 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:58:11 BoogieIcfgContainer [2021-12-21 10:58:11,762 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 10:58:11,764 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 10:58:11,764 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 10:58:11,767 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 10:58:11,767 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 10:58:09" (1/3) ... [2021-12-21 10:58:11,767 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f16bb20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:58:11, skipping insertion in model container [2021-12-21 10:58:11,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 10:58:10" (2/3) ... [2021-12-21 10:58:11,768 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f16bb20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 10:58:11, skipping insertion in model container [2021-12-21 10:58:11,768 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 10:58:11" (3/3) ... [2021-12-21 10:58:11,769 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label11.c [2021-12-21 10:58:11,776 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 10:58:11,777 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 10:58:11,830 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 10:58:11,837 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 10:58:11,837 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 10:58:11,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:11,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-12-21 10:58:11,879 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:11,880 INFO L514 BasicCegarLoop]: 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] [2021-12-21 10:58:11,880 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:11,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:11,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1818267785, now seen corresponding path program 1 times [2021-12-21 10:58:11,891 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:11,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109892105] [2021-12-21 10:58:11,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:11,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:12,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:12,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:12,175 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109892105] [2021-12-21 10:58:12,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109892105] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:12,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:12,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:58:12,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079305078] [2021-12-21 10:58:12,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:12,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:12,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:12,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:12,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:12,210 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 0 states have call successors, (0), 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 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:13,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:13,172 INFO L93 Difference]: Finished difference Result 769 states and 1360 transitions. [2021-12-21 10:58:13,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:13,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-12-21 10:58:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:13,192 INFO L225 Difference]: With dead ends: 769 [2021-12-21 10:58:13,192 INFO L226 Difference]: Without dead ends: 422 [2021-12-21 10:58:13,197 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:13,200 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 179 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:13,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 163 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:58:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-12-21 10:58:13,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 412. [2021-12-21 10:58:13,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 1.5231143552311435) internal successors, (626), 411 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:13,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 626 transitions. [2021-12-21 10:58:13,259 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 626 transitions. Word has length 61 [2021-12-21 10:58:13,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:13,260 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 626 transitions. [2021-12-21 10:58:13,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:13,260 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 626 transitions. [2021-12-21 10:58:13,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-12-21 10:58:13,264 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:13,264 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 10:58:13,264 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 10:58:13,265 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:13,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:13,265 INFO L85 PathProgramCache]: Analyzing trace with hash -622668213, now seen corresponding path program 1 times [2021-12-21 10:58:13,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:13,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402372275] [2021-12-21 10:58:13,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:13,266 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:13,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:13,379 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:13,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:13,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402372275] [2021-12-21 10:58:13,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402372275] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:13,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:13,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:58:13,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838233502] [2021-12-21 10:58:13,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:13,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:13,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:13,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:13,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:13,383 INFO L87 Difference]: Start difference. First operand 412 states and 626 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:14,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:14,042 INFO L93 Difference]: Finished difference Result 1194 states and 1821 transitions. [2021-12-21 10:58:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:14,044 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 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 127 [2021-12-21 10:58:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:14,047 INFO L225 Difference]: With dead ends: 1194 [2021-12-21 10:58:14,047 INFO L226 Difference]: Without dead ends: 784 [2021-12-21 10:58:14,049 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:14,050 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 175 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:14,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 154 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2021-12-21 10:58:14,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2021-12-21 10:58:14,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 783 states have (on average 1.3742017879948913) internal successors, (1076), 783 states have internal predecessors, (1076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 1076 transitions. [2021-12-21 10:58:14,092 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 1076 transitions. Word has length 127 [2021-12-21 10:58:14,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:14,093 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 1076 transitions. [2021-12-21 10:58:14,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 2 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 1076 transitions. [2021-12-21 10:58:14,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-12-21 10:58:14,097 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:14,097 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 10:58:14,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 10:58:14,098 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:14,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:14,099 INFO L85 PathProgramCache]: Analyzing trace with hash 834203477, now seen corresponding path program 1 times [2021-12-21 10:58:14,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:14,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237305479] [2021-12-21 10:58:14,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:14,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:14,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:14,269 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:14,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237305479] [2021-12-21 10:58:14,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237305479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:14,270 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:14,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:58:14,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301358254] [2021-12-21 10:58:14,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:14,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:14,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:14,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:14,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:14,272 INFO L87 Difference]: Start difference. First operand 784 states and 1076 transitions. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:14,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:14,859 INFO L93 Difference]: Finished difference Result 1936 states and 2599 transitions. [2021-12-21 10:58:14,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:14,864 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 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 131 [2021-12-21 10:58:14,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:14,872 INFO L225 Difference]: With dead ends: 1936 [2021-12-21 10:58:14,872 INFO L226 Difference]: Without dead ends: 1154 [2021-12-21 10:58:14,873 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:14,877 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 119 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:14,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 190 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 529 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:14,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-12-21 10:58:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 1153. [2021-12-21 10:58:14,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.2699652777777777) internal successors, (1463), 1152 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:14,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1463 transitions. [2021-12-21 10:58:14,902 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1463 transitions. Word has length 131 [2021-12-21 10:58:14,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:14,902 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1463 transitions. [2021-12-21 10:58:14,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 2 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:14,903 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1463 transitions. [2021-12-21 10:58:14,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-12-21 10:58:14,911 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:14,911 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-21 10:58:14,912 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 10:58:14,912 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:14,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:14,913 INFO L85 PathProgramCache]: Analyzing trace with hash 461291020, now seen corresponding path program 1 times [2021-12-21 10:58:14,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:14,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443578102] [2021-12-21 10:58:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:14,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:15,074 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 58 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:15,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:15,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443578102] [2021-12-21 10:58:15,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443578102] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:15,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:15,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:15,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192505433] [2021-12-21 10:58:15,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:15,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:15,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:15,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:15,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:15,079 INFO L87 Difference]: Start difference. First operand 1153 states and 1463 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:15,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:15,736 INFO L93 Difference]: Finished difference Result 2679 states and 3481 transitions. [2021-12-21 10:58:15,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:15,737 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-12-21 10:58:15,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:15,743 INFO L225 Difference]: With dead ends: 2679 [2021-12-21 10:58:15,743 INFO L226 Difference]: Without dead ends: 1712 [2021-12-21 10:58:15,745 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:15,746 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 145 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:15,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 332 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:15,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1712 states. [2021-12-21 10:58:15,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1712 to 1521. [2021-12-21 10:58:15,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1521 states, 1520 states have (on average 1.255921052631579) internal successors, (1909), 1520 states have internal predecessors, (1909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:15,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1521 states to 1521 states and 1909 transitions. [2021-12-21 10:58:15,783 INFO L78 Accepts]: Start accepts. Automaton has 1521 states and 1909 transitions. Word has length 173 [2021-12-21 10:58:15,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:15,784 INFO L470 AbstractCegarLoop]: Abstraction has 1521 states and 1909 transitions. [2021-12-21 10:58:15,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1521 states and 1909 transitions. [2021-12-21 10:58:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-21 10:58:15,787 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:15,788 INFO L514 BasicCegarLoop]: 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, 3, 3, 3, 3, 3, 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] [2021-12-21 10:58:15,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-21 10:58:15,788 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:15,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:15,789 INFO L85 PathProgramCache]: Analyzing trace with hash -1875503464, now seen corresponding path program 1 times [2021-12-21 10:58:15,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:15,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956773741] [2021-12-21 10:58:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:15,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:15,916 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-21 10:58:15,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:15,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956773741] [2021-12-21 10:58:15,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956773741] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:15,917 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:15,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:15,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740717495] [2021-12-21 10:58:15,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:15,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:15,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:15,920 INFO L87 Difference]: Start difference. First operand 1521 states and 1909 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) [2021-12-21 10:58:16,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:16,586 INFO L93 Difference]: Finished difference Result 3970 states and 4986 transitions. [2021-12-21 10:58:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:16,586 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 243 [2021-12-21 10:58:16,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:16,594 INFO L225 Difference]: With dead ends: 3970 [2021-12-21 10:58:16,595 INFO L226 Difference]: Without dead ends: 2451 [2021-12-21 10:58:16,615 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:16,616 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 180 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:16,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 159 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:16,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2451 states. [2021-12-21 10:58:16,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2451 to 2450. [2021-12-21 10:58:16,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2450 states, 2449 states have (on average 1.2339730502245814) internal successors, (3022), 2449 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:16,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2450 states to 2450 states and 3022 transitions. [2021-12-21 10:58:16,654 INFO L78 Accepts]: Start accepts. Automaton has 2450 states and 3022 transitions. Word has length 243 [2021-12-21 10:58:16,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:16,655 INFO L470 AbstractCegarLoop]: Abstraction has 2450 states and 3022 transitions. [2021-12-21 10:58:16,655 INFO L471 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) [2021-12-21 10:58:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2450 states and 3022 transitions. [2021-12-21 10:58:16,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-12-21 10:58:16,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:16,660 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-21 10:58:16,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 10:58:16,660 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:16,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:16,661 INFO L85 PathProgramCache]: Analyzing trace with hash -575038418, now seen corresponding path program 1 times [2021-12-21 10:58:16,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:16,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741926648] [2021-12-21 10:58:16,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:16,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:16,782 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 117 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-21 10:58:16,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:16,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741926648] [2021-12-21 10:58:16,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741926648] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:16,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:16,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:16,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679904737] [2021-12-21 10:58:16,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:16,785 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:16,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:16,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:16,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:16,786 INFO L87 Difference]: Start difference. First operand 2450 states and 3022 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:17,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:17,533 INFO L93 Difference]: Finished difference Result 5638 states and 7017 transitions. [2021-12-21 10:58:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:17,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 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 [2021-12-21 10:58:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:17,543 INFO L225 Difference]: With dead ends: 5638 [2021-12-21 10:58:17,543 INFO L226 Difference]: Without dead ends: 3190 [2021-12-21 10:58:17,546 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:17,547 INFO L933 BasicCegarLoop]: 356 mSDtfsCounter, 140 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:17,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 378 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:58:17,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3190 states. [2021-12-21 10:58:17,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3190 to 2630. [2021-12-21 10:58:17,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2630 states, 2629 states have (on average 1.2286040319513123) internal successors, (3230), 2629 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2630 states to 2630 states and 3230 transitions. [2021-12-21 10:58:17,588 INFO L78 Accepts]: Start accepts. Automaton has 2630 states and 3230 transitions. Word has length 280 [2021-12-21 10:58:17,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:17,588 INFO L470 AbstractCegarLoop]: Abstraction has 2630 states and 3230 transitions. [2021-12-21 10:58:17,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:17,589 INFO L276 IsEmpty]: Start isEmpty. Operand 2630 states and 3230 transitions. [2021-12-21 10:58:17,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2021-12-21 10:58:17,594 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:17,594 INFO L514 BasicCegarLoop]: 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, 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] [2021-12-21 10:58:17,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 10:58:17,595 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:17,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:17,595 INFO L85 PathProgramCache]: Analyzing trace with hash 94013981, now seen corresponding path program 1 times [2021-12-21 10:58:17,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:17,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491178112] [2021-12-21 10:58:17,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:17,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:17,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:17,723 INFO L134 CoverageAnalysis]: Checked inductivity of 241 backedges. 241 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:17,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:17,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491178112] [2021-12-21 10:58:17,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491178112] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:17,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:17,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:17,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916576410] [2021-12-21 10:58:17,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:17,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:17,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:17,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:17,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:17,727 INFO L87 Difference]: Start difference. First operand 2630 states and 3230 transitions. Second operand has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:18,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:18,869 INFO L93 Difference]: Finished difference Result 8042 states and 9930 transitions. [2021-12-21 10:58:18,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:18,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 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 321 [2021-12-21 10:58:18,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:18,887 INFO L225 Difference]: With dead ends: 8042 [2021-12-21 10:58:18,887 INFO L226 Difference]: Without dead ends: 5414 [2021-12-21 10:58:18,890 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:18,892 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 231 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 1277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 161 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:18,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 91 Invalid, 1277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [161 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 10:58:18,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5414 states. [2021-12-21 10:58:18,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5414 to 5227. [2021-12-21 10:58:18,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5227 states, 5226 states have (on average 1.2085725220053578) internal successors, (6316), 5226 states have internal predecessors, (6316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:18,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5227 states to 5227 states and 6316 transitions. [2021-12-21 10:58:18,979 INFO L78 Accepts]: Start accepts. Automaton has 5227 states and 6316 transitions. Word has length 321 [2021-12-21 10:58:18,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:18,980 INFO L470 AbstractCegarLoop]: Abstraction has 5227 states and 6316 transitions. [2021-12-21 10:58:18,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 80.25) internal successors, (321), 3 states have internal predecessors, (321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:18,980 INFO L276 IsEmpty]: Start isEmpty. Operand 5227 states and 6316 transitions. [2021-12-21 10:58:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2021-12-21 10:58:18,989 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:18,989 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:18,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 10:58:18,990 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:18,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:18,991 INFO L85 PathProgramCache]: Analyzing trace with hash 471217609, now seen corresponding path program 1 times [2021-12-21 10:58:18,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:18,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318475210] [2021-12-21 10:58:18,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:18,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:19,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-12-21 10:58:19,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:19,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318475210] [2021-12-21 10:58:19,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318475210] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:19,169 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:19,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:19,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306227809] [2021-12-21 10:58:19,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:19,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:19,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:19,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:19,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:19,172 INFO L87 Difference]: Start difference. First operand 5227 states and 6316 transitions. Second operand has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:19,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:19,777 INFO L93 Difference]: Finished difference Result 10081 states and 12247 transitions. [2021-12-21 10:58:19,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:19,777 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 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 367 [2021-12-21 10:58:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:19,793 INFO L225 Difference]: With dead ends: 10081 [2021-12-21 10:58:19,793 INFO L226 Difference]: Without dead ends: 5224 [2021-12-21 10:58:19,799 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:19,799 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 151 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:19,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 304 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:19,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5224 states. [2021-12-21 10:58:19,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5224 to 5223. [2021-12-21 10:58:19,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5223 states, 5222 states have (on average 1.1721562619685943) internal successors, (6121), 5222 states have internal predecessors, (6121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:19,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5223 states to 5223 states and 6121 transitions. [2021-12-21 10:58:19,915 INFO L78 Accepts]: Start accepts. Automaton has 5223 states and 6121 transitions. Word has length 367 [2021-12-21 10:58:19,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:19,916 INFO L470 AbstractCegarLoop]: Abstraction has 5223 states and 6121 transitions. [2021-12-21 10:58:19,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.0) internal successors, (213), 3 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 5223 states and 6121 transitions. [2021-12-21 10:58:19,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-12-21 10:58:19,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:19,926 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:19,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 10:58:19,927 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:19,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:19,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1789756958, now seen corresponding path program 1 times [2021-12-21 10:58:19,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:19,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386383807] [2021-12-21 10:58:19,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:19,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 347 proven. 0 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2021-12-21 10:58:20,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:20,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386383807] [2021-12-21 10:58:20,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386383807] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:20,081 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:20,081 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:20,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161225592] [2021-12-21 10:58:20,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:20,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:20,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:20,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:20,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:20,085 INFO L87 Difference]: Start difference. First operand 5223 states and 6121 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:20,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:20,833 INFO L93 Difference]: Finished difference Result 11741 states and 13889 transitions. [2021-12-21 10:58:20,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:20,833 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 372 [2021-12-21 10:58:20,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:20,853 INFO L225 Difference]: With dead ends: 11741 [2021-12-21 10:58:20,853 INFO L226 Difference]: Without dead ends: 6888 [2021-12-21 10:58:20,858 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:20,859 INFO L933 BasicCegarLoop]: 335 mSDtfsCounter, 118 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 588 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:20,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 362 Invalid, 656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 588 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:58:20,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6888 states. [2021-12-21 10:58:20,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6888 to 6700. [2021-12-21 10:58:20,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6700 states, 6699 states have (on average 1.1576354679802956) internal successors, (7755), 6699 states have internal predecessors, (7755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6700 states to 6700 states and 7755 transitions. [2021-12-21 10:58:20,954 INFO L78 Accepts]: Start accepts. Automaton has 6700 states and 7755 transitions. Word has length 372 [2021-12-21 10:58:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:20,955 INFO L470 AbstractCegarLoop]: Abstraction has 6700 states and 7755 transitions. [2021-12-21 10:58:20,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:20,956 INFO L276 IsEmpty]: Start isEmpty. Operand 6700 states and 7755 transitions. [2021-12-21 10:58:20,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 387 [2021-12-21 10:58:20,966 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:20,966 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:20,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 10:58:20,967 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:20,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:20,967 INFO L85 PathProgramCache]: Analyzing trace with hash -152091538, now seen corresponding path program 1 times [2021-12-21 10:58:20,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:20,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334317483] [2021-12-21 10:58:20,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:20,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 458 backedges. 176 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-12-21 10:58:21,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:21,114 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334317483] [2021-12-21 10:58:21,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334317483] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:21,115 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:21,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:21,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244754290] [2021-12-21 10:58:21,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:21,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:21,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:21,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:21,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:21,128 INFO L87 Difference]: Start difference. First operand 6700 states and 7755 transitions. Second operand has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:21,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:21,861 INFO L93 Difference]: Finished difference Result 16527 states and 19323 transitions. [2021-12-21 10:58:21,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:21,862 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 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 386 [2021-12-21 10:58:21,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:21,893 INFO L225 Difference]: With dead ends: 16527 [2021-12-21 10:58:21,894 INFO L226 Difference]: Without dead ends: 10197 [2021-12-21 10:58:21,901 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:21,902 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 158 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 664 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:21,903 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 130 Invalid, 664 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:58:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10197 states. [2021-12-21 10:58:22,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10197 to 9827. [2021-12-21 10:58:22,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9827 states, 9826 states have (on average 1.1501119478933441) internal successors, (11301), 9826 states have internal predecessors, (11301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9827 states to 9827 states and 11301 transitions. [2021-12-21 10:58:22,073 INFO L78 Accepts]: Start accepts. Automaton has 9827 states and 11301 transitions. Word has length 386 [2021-12-21 10:58:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:22,074 INFO L470 AbstractCegarLoop]: Abstraction has 9827 states and 11301 transitions. [2021-12-21 10:58:22,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.666666666666664) internal successors, (191), 3 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:22,075 INFO L276 IsEmpty]: Start isEmpty. Operand 9827 states and 11301 transitions. [2021-12-21 10:58:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 402 [2021-12-21 10:58:22,089 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:22,090 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 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] [2021-12-21 10:58:22,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 10:58:22,090 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:22,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:22,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1552606349, now seen corresponding path program 1 times [2021-12-21 10:58:22,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:22,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446151375] [2021-12-21 10:58:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:22,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:22,275 INFO L134 CoverageAnalysis]: Checked inductivity of 488 backedges. 429 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 10:58:22,275 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:22,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446151375] [2021-12-21 10:58:22,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446151375] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:22,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:22,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:22,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259160689] [2021-12-21 10:58:22,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:22,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:22,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:22,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:22,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:22,278 INFO L87 Difference]: Start difference. First operand 9827 states and 11301 transitions. Second operand has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:22,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:22,956 INFO L93 Difference]: Finished difference Result 21125 states and 24424 transitions. [2021-12-21 10:58:22,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:22,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 401 [2021-12-21 10:58:22,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:23,013 INFO L225 Difference]: With dead ends: 21125 [2021-12-21 10:58:23,014 INFO L226 Difference]: Without dead ends: 11668 [2021-12-21 10:58:23,021 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:23,023 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 130 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 686 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:23,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 77 Invalid, 686 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 545 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:23,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11668 states. [2021-12-21 10:58:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11668 to 11295. [2021-12-21 10:58:23,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11295 states, 11294 states have (on average 1.1512307419868957) internal successors, (13002), 11294 states have internal predecessors, (13002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11295 states to 11295 states and 13002 transitions. [2021-12-21 10:58:23,161 INFO L78 Accepts]: Start accepts. Automaton has 11295 states and 13002 transitions. Word has length 401 [2021-12-21 10:58:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:23,162 INFO L470 AbstractCegarLoop]: Abstraction has 11295 states and 13002 transitions. [2021-12-21 10:58:23,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.33333333333333) internal successors, (343), 3 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 11295 states and 13002 transitions. [2021-12-21 10:58:23,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 403 [2021-12-21 10:58:23,174 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:23,175 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:23,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 10:58:23,175 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:23,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:23,176 INFO L85 PathProgramCache]: Analyzing trace with hash 111498109, now seen corresponding path program 1 times [2021-12-21 10:58:23,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:23,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280681292] [2021-12-21 10:58:23,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:23,177 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:23,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 490 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:23,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:23,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280681292] [2021-12-21 10:58:23,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280681292] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:23,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:23,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:58:23,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361542688] [2021-12-21 10:58:23,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:23,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:23,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:23,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:23,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:23,398 INFO L87 Difference]: Start difference. First operand 11295 states and 13002 transitions. Second operand has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:24,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:24,320 INFO L93 Difference]: Finished difference Result 26118 states and 30099 transitions. [2021-12-21 10:58:24,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:24,321 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 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 402 [2021-12-21 10:58:24,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:24,344 INFO L225 Difference]: With dead ends: 26118 [2021-12-21 10:58:24,344 INFO L226 Difference]: Without dead ends: 15193 [2021-12-21 10:58:24,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:24,356 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 207 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1037 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 1134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 1037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:24,357 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 156 Invalid, 1134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 1037 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:24,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15193 states. [2021-12-21 10:58:24,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15193 to 13713. [2021-12-21 10:58:24,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13713 states, 13712 states have (on average 1.1468786464410734) internal successors, (15726), 13712 states have internal predecessors, (15726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:24,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13713 states to 13713 states and 15726 transitions. [2021-12-21 10:58:24,577 INFO L78 Accepts]: Start accepts. Automaton has 13713 states and 15726 transitions. Word has length 402 [2021-12-21 10:58:24,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:24,578 INFO L470 AbstractCegarLoop]: Abstraction has 13713 states and 15726 transitions. [2021-12-21 10:58:24,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.5) internal successors, (402), 4 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:24,578 INFO L276 IsEmpty]: Start isEmpty. Operand 13713 states and 15726 transitions. [2021-12-21 10:58:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 413 [2021-12-21 10:58:24,591 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:24,591 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:24,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 10:58:24,592 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:24,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1118876028, now seen corresponding path program 1 times [2021-12-21 10:58:24,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:24,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247104276] [2021-12-21 10:58:24,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:24,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:24,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 176 proven. 203 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-12-21 10:58:24,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:24,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247104276] [2021-12-21 10:58:24,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247104276] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:24,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022787413] [2021-12-21 10:58:24,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:24,813 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:24,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:24,819 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) [2021-12-21 10:58:24,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 10:58:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:25,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 565 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:58:25,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:25,952 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 441 proven. 0 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-12-21 10:58:25,953 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:25,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022787413] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:25,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:25,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 10:58:25,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954786560] [2021-12-21 10:58:25,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:25,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:25,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:25,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:25,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:58:25,956 INFO L87 Difference]: Start difference. First operand 13713 states and 15726 transitions. Second operand has 4 states, 4 states have (on average 88.5) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:27,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:27,189 INFO L93 Difference]: Finished difference Result 32407 states and 37378 transitions. [2021-12-21 10:58:27,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:27,189 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 88.5) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 412 [2021-12-21 10:58:27,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:27,212 INFO L225 Difference]: With dead ends: 32407 [2021-12-21 10:58:27,212 INFO L226 Difference]: Without dead ends: 19064 [2021-12-21 10:58:27,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 410 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:58:27,225 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 191 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:27,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 115 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 10:58:27,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19064 states. [2021-12-21 10:58:27,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19064 to 19052. [2021-12-21 10:58:27,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19052 states, 19051 states have (on average 1.1395202351582594) internal successors, (21709), 19051 states have internal predecessors, (21709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:27,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19052 states to 19052 states and 21709 transitions. [2021-12-21 10:58:27,540 INFO L78 Accepts]: Start accepts. Automaton has 19052 states and 21709 transitions. Word has length 412 [2021-12-21 10:58:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:27,540 INFO L470 AbstractCegarLoop]: Abstraction has 19052 states and 21709 transitions. [2021-12-21 10:58:27,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 88.5) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:27,541 INFO L276 IsEmpty]: Start isEmpty. Operand 19052 states and 21709 transitions. [2021-12-21 10:58:27,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-12-21 10:58:27,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:27,564 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:27,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 10:58:27,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-21 10:58:27,779 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:27,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:27,780 INFO L85 PathProgramCache]: Analyzing trace with hash -761542586, now seen corresponding path program 1 times [2021-12-21 10:58:27,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:27,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052976099] [2021-12-21 10:58:27,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:27,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:27,994 INFO L134 CoverageAnalysis]: Checked inductivity of 804 backedges. 461 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-12-21 10:58:27,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:27,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052976099] [2021-12-21 10:58:27,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052976099] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:27,994 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:27,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:27,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561799123] [2021-12-21 10:58:27,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:27,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:27,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:27,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:27,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:27,997 INFO L87 Difference]: Start difference. First operand 19052 states and 21709 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:28,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:28,732 INFO L93 Difference]: Finished difference Result 39573 states and 45097 transitions. [2021-12-21 10:58:28,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:28,733 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 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 500 [2021-12-21 10:58:28,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:28,758 INFO L225 Difference]: With dead ends: 39573 [2021-12-21 10:58:28,758 INFO L226 Difference]: Without dead ends: 19047 [2021-12-21 10:58:28,775 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:28,776 INFO L933 BasicCegarLoop]: 336 mSDtfsCounter, 196 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:28,777 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 360 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 10:58:28,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19047 states. [2021-12-21 10:58:29,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19047 to 18303. [2021-12-21 10:58:29,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18303 states, 18302 states have (on average 1.115725057370779) internal successors, (20420), 18302 states have internal predecessors, (20420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:29,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18303 states to 18303 states and 20420 transitions. [2021-12-21 10:58:29,054 INFO L78 Accepts]: Start accepts. Automaton has 18303 states and 20420 transitions. Word has length 500 [2021-12-21 10:58:29,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:29,055 INFO L470 AbstractCegarLoop]: Abstraction has 18303 states and 20420 transitions. [2021-12-21 10:58:29,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:29,056 INFO L276 IsEmpty]: Start isEmpty. Operand 18303 states and 20420 transitions. [2021-12-21 10:58:29,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2021-12-21 10:58:29,080 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:29,081 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2021-12-21 10:58:29,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 10:58:29,081 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:29,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:29,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1708266968, now seen corresponding path program 1 times [2021-12-21 10:58:29,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:29,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250030400] [2021-12-21 10:58:29,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:29,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:29,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 447 proven. 85 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-21 10:58:29,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:29,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250030400] [2021-12-21 10:58:29,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250030400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:29,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244081476] [2021-12-21 10:58:29,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:29,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:29,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:29,396 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) [2021-12-21 10:58:29,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 10:58:29,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:29,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 682 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:58:29,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:30,399 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 532 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-21 10:58:30,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:30,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244081476] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:30,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:30,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 10:58:30,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76087367] [2021-12-21 10:58:30,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:30,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:30,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:30,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:30,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:58:30,402 INFO L87 Difference]: Start difference. First operand 18303 states and 20420 transitions. Second operand has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:30,931 INFO L93 Difference]: Finished difference Result 37162 states and 41451 transitions. [2021-12-21 10:58:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 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 507 [2021-12-21 10:58:30,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:30,954 INFO L225 Difference]: With dead ends: 37162 [2021-12-21 10:58:30,954 INFO L226 Difference]: Without dead ends: 19229 [2021-12-21 10:58:30,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:58:30,967 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 83 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 519 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:30,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 162 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 519 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:30,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19229 states. [2021-12-21 10:58:31,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19229 to 18855. [2021-12-21 10:58:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18855 states, 18854 states have (on average 1.1102683780630105) internal successors, (20933), 18854 states have internal predecessors, (20933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:31,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18855 states to 18855 states and 20933 transitions. [2021-12-21 10:58:31,244 INFO L78 Accepts]: Start accepts. Automaton has 18855 states and 20933 transitions. Word has length 507 [2021-12-21 10:58:31,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:31,245 INFO L470 AbstractCegarLoop]: Abstraction has 18855 states and 20933 transitions. [2021-12-21 10:58:31,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 102.0) internal successors, (306), 3 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:31,245 INFO L276 IsEmpty]: Start isEmpty. Operand 18855 states and 20933 transitions. [2021-12-21 10:58:31,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-12-21 10:58:31,265 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:31,265 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2021-12-21 10:58:31,289 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 10:58:31,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-21 10:58:31,479 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:31,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:31,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1545968281, now seen corresponding path program 1 times [2021-12-21 10:58:31,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:31,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537889017] [2021-12-21 10:58:31,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:31,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:31,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:31,735 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 508 proven. 24 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-21 10:58:31,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:31,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537889017] [2021-12-21 10:58:31,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1537889017] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:31,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759703602] [2021-12-21 10:58:31,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:31,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:31,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:31,737 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) [2021-12-21 10:58:31,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 10:58:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:31,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 683 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:58:31,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 532 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-21 10:58:32,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:32,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759703602] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:32,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:32,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 8 [2021-12-21 10:58:32,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620953991] [2021-12-21 10:58:32,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:32,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:32,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:32,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:32,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:58:32,877 INFO L87 Difference]: Start difference. First operand 18855 states and 20933 transitions. Second operand has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:33,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:33,676 INFO L93 Difference]: Finished difference Result 39730 states and 44007 transitions. [2021-12-21 10:58:33,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:33,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 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 508 [2021-12-21 10:58:33,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:33,694 INFO L225 Difference]: With dead ends: 39730 [2021-12-21 10:58:33,694 INFO L226 Difference]: Without dead ends: 21245 [2021-12-21 10:58:33,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 506 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:58:33,706 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 278 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 932 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 1008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:33,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 160 Invalid, 1008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 932 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 10:58:33,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21245 states. [2021-12-21 10:58:33,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21245 to 18109. [2021-12-21 10:58:33,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18109 states, 18108 states have (on average 1.1061961563949636) internal successors, (20031), 18108 states have internal predecessors, (20031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:34,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18109 states to 18109 states and 20031 transitions. [2021-12-21 10:58:34,001 INFO L78 Accepts]: Start accepts. Automaton has 18109 states and 20031 transitions. Word has length 508 [2021-12-21 10:58:34,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:34,001 INFO L470 AbstractCegarLoop]: Abstraction has 18109 states and 20031 transitions. [2021-12-21 10:58:34,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:34,002 INFO L276 IsEmpty]: Start isEmpty. Operand 18109 states and 20031 transitions. [2021-12-21 10:58:34,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 536 [2021-12-21 10:58:34,020 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:34,020 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2021-12-21 10:58:34,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 10:58:34,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:34,229 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:34,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:34,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1134199501, now seen corresponding path program 1 times [2021-12-21 10:58:34,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:34,230 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071792027] [2021-12-21 10:58:34,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:34,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:34,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:34,712 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 572 proven. 310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 10:58:34,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:34,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071792027] [2021-12-21 10:58:34,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071792027] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:34,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996999708] [2021-12-21 10:58:34,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:34,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:34,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:34,714 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) [2021-12-21 10:58:34,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 10:58:34,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:34,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 710 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:58:34,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:35,588 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 699 proven. 0 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-12-21 10:58:35,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:35,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996999708] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:35,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:35,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8] total 10 [2021-12-21 10:58:35,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17285891] [2021-12-21 10:58:35,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:35,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:35,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:35,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:35,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:58:35,591 INFO L87 Difference]: Start difference. First operand 18109 states and 20031 transitions. Second operand has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:36,184 INFO L93 Difference]: Finished difference Result 37329 states and 41284 transitions. [2021-12-21 10:58:36,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:36,184 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 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 535 [2021-12-21 10:58:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:36,200 INFO L225 Difference]: With dead ends: 37329 [2021-12-21 10:58:36,201 INFO L226 Difference]: Without dead ends: 19590 [2021-12-21 10:58:36,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-12-21 10:58:36,215 INFO L933 BasicCegarLoop]: 323 mSDtfsCounter, 91 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:36,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 342 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 516 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:36,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19590 states. [2021-12-21 10:58:36,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19590 to 18475. [2021-12-21 10:58:36,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18475 states, 18474 states have (on average 1.1047417992854822) internal successors, (20409), 18474 states have internal predecessors, (20409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:36,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18475 states to 18475 states and 20409 transitions. [2021-12-21 10:58:36,481 INFO L78 Accepts]: Start accepts. Automaton has 18475 states and 20409 transitions. Word has length 535 [2021-12-21 10:58:36,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:36,482 INFO L470 AbstractCegarLoop]: Abstraction has 18475 states and 20409 transitions. [2021-12-21 10:58:36,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 118.0) internal successors, (354), 3 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:36,482 INFO L276 IsEmpty]: Start isEmpty. Operand 18475 states and 20409 transitions. [2021-12-21 10:58:36,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2021-12-21 10:58:36,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:36,495 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 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, 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] [2021-12-21 10:58:36,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 10:58:36,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-21 10:58:36,696 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:36,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:36,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1764270116, now seen corresponding path program 1 times [2021-12-21 10:58:36,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:36,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870086826] [2021-12-21 10:58:36,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:36,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 532 proven. 0 refuted. 0 times theorem prover too weak. 284 trivial. 0 not checked. [2021-12-21 10:58:36,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:36,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870086826] [2021-12-21 10:58:36,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870086826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:36,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:36,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:58:36,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205165035] [2021-12-21 10:58:36,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:36,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:36,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:36,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:36,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:36,935 INFO L87 Difference]: Start difference. First operand 18475 states and 20409 transitions. Second operand has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:37,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:37,971 INFO L93 Difference]: Finished difference Result 41564 states and 45924 transitions. [2021-12-21 10:58:37,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:37,972 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 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 540 [2021-12-21 10:58:37,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:37,992 INFO L225 Difference]: With dead ends: 41564 [2021-12-21 10:58:37,993 INFO L226 Difference]: Without dead ends: 23459 [2021-12-21 10:58:38,003 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:38,004 INFO L933 BasicCegarLoop]: 302 mSDtfsCounter, 311 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1337 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 1426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 1337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:38,004 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 341 Invalid, 1426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 1337 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 10:58:38,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23459 states. [2021-12-21 10:58:38,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23459 to 18284. [2021-12-21 10:58:38,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18284 states, 18283 states have (on average 1.1028277634961439) internal successors, (20163), 18283 states have internal predecessors, (20163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:38,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18284 states to 18284 states and 20163 transitions. [2021-12-21 10:58:38,189 INFO L78 Accepts]: Start accepts. Automaton has 18284 states and 20163 transitions. Word has length 540 [2021-12-21 10:58:38,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:38,190 INFO L470 AbstractCegarLoop]: Abstraction has 18284 states and 20163 transitions. [2021-12-21 10:58:38,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 84.75) internal successors, (339), 4 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:38,190 INFO L276 IsEmpty]: Start isEmpty. Operand 18284 states and 20163 transitions. [2021-12-21 10:58:38,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 632 [2021-12-21 10:58:38,208 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:38,208 INFO L514 BasicCegarLoop]: 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, 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, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:38,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 10:58:38,209 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:38,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:38,210 INFO L85 PathProgramCache]: Analyzing trace with hash 2068323999, now seen corresponding path program 1 times [2021-12-21 10:58:38,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:38,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014409768] [2021-12-21 10:58:38,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:38,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:38,478 INFO L134 CoverageAnalysis]: Checked inductivity of 1195 backedges. 612 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-12-21 10:58:38,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:38,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014409768] [2021-12-21 10:58:38,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014409768] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:38,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:38,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:58:38,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025099978] [2021-12-21 10:58:38,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:38,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:38,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:38,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:38,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:38,482 INFO L87 Difference]: Start difference. First operand 18284 states and 20163 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 2 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:38,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:38,856 INFO L93 Difference]: Finished difference Result 35823 states and 39522 transitions. [2021-12-21 10:58:38,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:38,857 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 2 states have internal predecessors, (290), 0 states have call successors, (0), 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 631 [2021-12-21 10:58:38,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:38,873 INFO L225 Difference]: With dead ends: 35823 [2021-12-21 10:58:38,873 INFO L226 Difference]: Without dead ends: 17909 [2021-12-21 10:58:38,881 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:38,882 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 157 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 299 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:38,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 34 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 299 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:58:38,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17909 states. [2021-12-21 10:58:39,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17909 to 17906. [2021-12-21 10:58:39,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17906 states, 17905 states have (on average 1.1019268360793075) internal successors, (19730), 17905 states have internal predecessors, (19730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17906 states to 17906 states and 19730 transitions. [2021-12-21 10:58:39,028 INFO L78 Accepts]: Start accepts. Automaton has 17906 states and 19730 transitions. Word has length 631 [2021-12-21 10:58:39,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:39,029 INFO L470 AbstractCegarLoop]: Abstraction has 17906 states and 19730 transitions. [2021-12-21 10:58:39,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 2 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 17906 states and 19730 transitions. [2021-12-21 10:58:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2021-12-21 10:58:39,048 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:39,048 INFO L514 BasicCegarLoop]: 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, 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, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:39,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 10:58:39,049 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:39,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:39,049 INFO L85 PathProgramCache]: Analyzing trace with hash 1252408039, now seen corresponding path program 1 times [2021-12-21 10:58:39,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:39,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795443425] [2021-12-21 10:58:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:39,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:39,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:39,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1252 backedges. 914 proven. 0 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2021-12-21 10:58:39,262 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:39,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795443425] [2021-12-21 10:58:39,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795443425] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:39,262 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:39,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:39,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972046665] [2021-12-21 10:58:39,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:39,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:39,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:39,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:39,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:39,266 INFO L87 Difference]: Start difference. First operand 17906 states and 19730 transitions. Second operand has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:39,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:39,877 INFO L93 Difference]: Finished difference Result 38022 states and 41945 transitions. [2021-12-21 10:58:39,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:39,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 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 651 [2021-12-21 10:58:39,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:39,897 INFO L225 Difference]: With dead ends: 38022 [2021-12-21 10:58:39,897 INFO L226 Difference]: Without dead ends: 20486 [2021-12-21 10:58:39,906 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:39,907 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 124 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:39,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 74 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:39,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20486 states. [2021-12-21 10:58:40,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20486 to 18274. [2021-12-21 10:58:40,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18274 states, 18273 states have (on average 1.0996552290264325) internal successors, (20094), 18273 states have internal predecessors, (20094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:40,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18274 states to 18274 states and 20094 transitions. [2021-12-21 10:58:40,070 INFO L78 Accepts]: Start accepts. Automaton has 18274 states and 20094 transitions. Word has length 651 [2021-12-21 10:58:40,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:40,071 INFO L470 AbstractCegarLoop]: Abstraction has 18274 states and 20094 transitions. [2021-12-21 10:58:40,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.0) internal successors, (393), 3 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:40,071 INFO L276 IsEmpty]: Start isEmpty. Operand 18274 states and 20094 transitions. [2021-12-21 10:58:40,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 653 [2021-12-21 10:58:40,128 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:40,129 INFO L514 BasicCegarLoop]: 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, 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, 6, 5, 5, 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, 4, 4, 4, 4, 4, 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] [2021-12-21 10:58:40,129 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-21 10:58:40,129 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:40,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:40,129 INFO L85 PathProgramCache]: Analyzing trace with hash -352651479, now seen corresponding path program 1 times [2021-12-21 10:58:40,130 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:40,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145577280] [2021-12-21 10:58:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:40,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:40,335 INFO L134 CoverageAnalysis]: Checked inductivity of 1289 backedges. 698 proven. 0 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2021-12-21 10:58:40,335 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:40,335 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145577280] [2021-12-21 10:58:40,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145577280] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:40,336 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:40,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:40,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893742107] [2021-12-21 10:58:40,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:40,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:40,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:40,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:40,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:40,338 INFO L87 Difference]: Start difference. First operand 18274 states and 20094 transitions. Second operand has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:40,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:40,896 INFO L93 Difference]: Finished difference Result 36728 states and 40390 transitions. [2021-12-21 10:58:40,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:40,896 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 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 652 [2021-12-21 10:58:40,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:40,913 INFO L225 Difference]: With dead ends: 36728 [2021-12-21 10:58:40,913 INFO L226 Difference]: Without dead ends: 18824 [2021-12-21 10:58:40,923 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:40,924 INFO L933 BasicCegarLoop]: 318 mSDtfsCounter, 87 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:40,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 337 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:40,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18824 states. [2021-12-21 10:58:41,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18824 to 17166. [2021-12-21 10:58:41,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17166 states, 17165 states have (on average 1.0982813865423828) internal successors, (18852), 17165 states have internal predecessors, (18852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:41,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17166 states to 17166 states and 18852 transitions. [2021-12-21 10:58:41,077 INFO L78 Accepts]: Start accepts. Automaton has 17166 states and 18852 transitions. Word has length 652 [2021-12-21 10:58:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:41,077 INFO L470 AbstractCegarLoop]: Abstraction has 17166 states and 18852 transitions. [2021-12-21 10:58:41,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.0) internal successors, (336), 3 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:41,078 INFO L276 IsEmpty]: Start isEmpty. Operand 17166 states and 18852 transitions. [2021-12-21 10:58:41,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 709 [2021-12-21 10:58:41,091 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:41,092 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:41,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 10:58:41,092 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:41,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:41,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1883102673, now seen corresponding path program 1 times [2021-12-21 10:58:41,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:41,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394974164] [2021-12-21 10:58:41,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:41,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1789 backedges. 1223 proven. 61 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-12-21 10:58:41,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:41,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394974164] [2021-12-21 10:58:41,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394974164] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:41,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765576771] [2021-12-21 10:58:41,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:41,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:41,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:41,335 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) [2021-12-21 10:58:41,336 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 10:58:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:41,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 938 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-21 10:58:41,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:42,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1789 backedges. 1284 proven. 0 refuted. 0 times theorem prover too weak. 505 trivial. 0 not checked. [2021-12-21 10:58:42,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:42,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765576771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:42,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:42,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-21 10:58:42,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378090937] [2021-12-21 10:58:42,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:42,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:42,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:42,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:42,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:58:42,364 INFO L87 Difference]: Start difference. First operand 17166 states and 18852 transitions. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:42,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:42,989 INFO L93 Difference]: Finished difference Result 34891 states and 38315 transitions. [2021-12-21 10:58:42,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:42,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 708 [2021-12-21 10:58:42,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:43,006 INFO L225 Difference]: With dead ends: 34891 [2021-12-21 10:58:43,007 INFO L226 Difference]: Without dead ends: 18095 [2021-12-21 10:58:43,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 711 GetRequests, 707 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-21 10:58:43,018 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 122 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:43,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 79 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18095 states. [2021-12-21 10:58:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18095 to 16982. [2021-12-21 10:58:43,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16982 states, 16981 states have (on average 1.0981685413108768) internal successors, (18648), 16981 states have internal predecessors, (18648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:43,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16982 states to 16982 states and 18648 transitions. [2021-12-21 10:58:43,205 INFO L78 Accepts]: Start accepts. Automaton has 16982 states and 18648 transitions. Word has length 708 [2021-12-21 10:58:43,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:43,206 INFO L470 AbstractCegarLoop]: Abstraction has 16982 states and 18648 transitions. [2021-12-21 10:58:43,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:43,207 INFO L276 IsEmpty]: Start isEmpty. Operand 16982 states and 18648 transitions. [2021-12-21 10:58:43,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 710 [2021-12-21 10:58:43,226 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:43,226 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:43,243 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 10:58:43,426 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-12-21 10:58:43,427 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:43,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:43,427 INFO L85 PathProgramCache]: Analyzing trace with hash 965344910, now seen corresponding path program 1 times [2021-12-21 10:58:43,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:43,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811937964] [2021-12-21 10:58:43,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:43,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:43,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 1789 backedges. 1236 proven. 0 refuted. 0 times theorem prover too weak. 553 trivial. 0 not checked. [2021-12-21 10:58:43,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:43,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811937964] [2021-12-21 10:58:43,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811937964] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:43,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:43,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:43,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333688809] [2021-12-21 10:58:43,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:43,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:43,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:43,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:43,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:43,676 INFO L87 Difference]: Start difference. First operand 16982 states and 18648 transitions. Second operand has 4 states, 4 states have (on average 93.5) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:44,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:44,576 INFO L93 Difference]: Finished difference Result 38207 states and 41942 transitions. [2021-12-21 10:58:44,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:44,576 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 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 709 [2021-12-21 10:58:44,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:44,600 INFO L225 Difference]: With dead ends: 38207 [2021-12-21 10:58:44,600 INFO L226 Difference]: Without dead ends: 21595 [2021-12-21 10:58:44,613 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:44,613 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 221 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:44,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 69 Invalid, 1110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:44,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21595 states. [2021-12-21 10:58:44,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21595 to 15510. [2021-12-21 10:58:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15510 states, 15509 states have (on average 1.0996195757302212) internal successors, (17054), 15509 states have internal predecessors, (17054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:44,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15510 states to 15510 states and 17054 transitions. [2021-12-21 10:58:44,801 INFO L78 Accepts]: Start accepts. Automaton has 15510 states and 17054 transitions. Word has length 709 [2021-12-21 10:58:44,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:44,801 INFO L470 AbstractCegarLoop]: Abstraction has 15510 states and 17054 transitions. [2021-12-21 10:58:44,801 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 93.5) internal successors, (374), 3 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:44,802 INFO L276 IsEmpty]: Start isEmpty. Operand 15510 states and 17054 transitions. [2021-12-21 10:58:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 795 [2021-12-21 10:58:44,817 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:44,818 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:44,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 10:58:44,818 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:44,819 INFO L85 PathProgramCache]: Analyzing trace with hash 2095403203, now seen corresponding path program 1 times [2021-12-21 10:58:44,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:44,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585078031] [2021-12-21 10:58:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:44,820 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:45,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2328 backedges. 1095 proven. 0 refuted. 0 times theorem prover too weak. 1233 trivial. 0 not checked. [2021-12-21 10:58:45,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:45,045 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585078031] [2021-12-21 10:58:45,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585078031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:45,045 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:45,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:45,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334090500] [2021-12-21 10:58:45,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:45,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:45,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:45,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:45,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:45,048 INFO L87 Difference]: Start difference. First operand 15510 states and 17054 transitions. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:45,927 INFO L93 Difference]: Finished difference Result 32130 states and 35360 transitions. [2021-12-21 10:58:45,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:45,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 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 794 [2021-12-21 10:58:45,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:45,941 INFO L225 Difference]: With dead ends: 32130 [2021-12-21 10:58:45,941 INFO L226 Difference]: Without dead ends: 16990 [2021-12-21 10:58:45,950 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:45,951 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 225 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:45,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 108 Invalid, 1189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16990 states. [2021-12-21 10:58:46,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16990 to 15698. [2021-12-21 10:58:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15698 states, 15697 states have (on average 1.0986812766770722) internal successors, (17246), 15697 states have internal predecessors, (17246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:46,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15698 states to 15698 states and 17246 transitions. [2021-12-21 10:58:46,074 INFO L78 Accepts]: Start accepts. Automaton has 15698 states and 17246 transitions. Word has length 794 [2021-12-21 10:58:46,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:46,074 INFO L470 AbstractCegarLoop]: Abstraction has 15698 states and 17246 transitions. [2021-12-21 10:58:46,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 3 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:46,074 INFO L276 IsEmpty]: Start isEmpty. Operand 15698 states and 17246 transitions. [2021-12-21 10:58:46,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 861 [2021-12-21 10:58:46,088 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:46,089 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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] [2021-12-21 10:58:46,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 10:58:46,089 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:46,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:46,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1612885747, now seen corresponding path program 1 times [2021-12-21 10:58:46,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:46,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802399576] [2021-12-21 10:58:46,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:46,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:46,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2469 backedges. 1886 proven. 0 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2021-12-21 10:58:46,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:46,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802399576] [2021-12-21 10:58:46,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802399576] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:46,400 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:46,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-21 10:58:46,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242059778] [2021-12-21 10:58:46,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:46,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:46,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:46,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:46,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:46,402 INFO L87 Difference]: Start difference. First operand 15698 states and 17246 transitions. Second operand has 4 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:47,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:47,322 INFO L93 Difference]: Finished difference Result 38405 states and 42177 transitions. [2021-12-21 10:58:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:47,323 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 860 [2021-12-21 10:58:47,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:47,341 INFO L225 Difference]: With dead ends: 38405 [2021-12-21 10:58:47,341 INFO L226 Difference]: Without dead ends: 23077 [2021-12-21 10:58:47,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:47,351 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 240 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:47,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 83 Invalid, 1215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:47,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23077 states. [2021-12-21 10:58:47,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23077 to 16071. [2021-12-21 10:58:47,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16071 states, 16070 states have (on average 1.0965774735532048) internal successors, (17622), 16070 states have internal predecessors, (17622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:47,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16071 states to 16071 states and 17622 transitions. [2021-12-21 10:58:47,510 INFO L78 Accepts]: Start accepts. Automaton has 16071 states and 17622 transitions. Word has length 860 [2021-12-21 10:58:47,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:47,510 INFO L470 AbstractCegarLoop]: Abstraction has 16071 states and 17622 transitions. [2021-12-21 10:58:47,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 123.75) internal successors, (495), 4 states have internal predecessors, (495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:47,511 INFO L276 IsEmpty]: Start isEmpty. Operand 16071 states and 17622 transitions. [2021-12-21 10:58:47,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2021-12-21 10:58:47,527 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:47,527 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 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, 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] [2021-12-21 10:58:47,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 10:58:47,527 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:47,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:47,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1417283486, now seen corresponding path program 1 times [2021-12-21 10:58:47,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:47,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841340399] [2021-12-21 10:58:47,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:47,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:47,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:47,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3855 backedges. 2290 proven. 830 refuted. 0 times theorem prover too weak. 735 trivial. 0 not checked. [2021-12-21 10:58:47,939 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:47,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841340399] [2021-12-21 10:58:47,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841340399] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:47,940 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629046554] [2021-12-21 10:58:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:47,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:47,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:47,943 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) [2021-12-21 10:58:47,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 10:58:48,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:48,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:58:48,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3855 backedges. 2335 proven. 0 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2021-12-21 10:58:49,557 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:49,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629046554] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:49,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:49,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 8 [2021-12-21 10:58:49,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472061016] [2021-12-21 10:58:49,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:49,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:49,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:49,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:49,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:58:49,559 INFO L87 Difference]: Start difference. First operand 16071 states and 17622 transitions. Second operand has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:50,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:50,060 INFO L93 Difference]: Finished difference Result 32336 states and 35486 transitions. [2021-12-21 10:58:50,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:50,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 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 1067 [2021-12-21 10:58:50,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:50,075 INFO L225 Difference]: With dead ends: 32336 [2021-12-21 10:58:50,075 INFO L226 Difference]: Without dead ends: 16635 [2021-12-21 10:58:50,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1074 GetRequests, 1068 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 10:58:50,085 INFO L933 BasicCegarLoop]: 312 mSDtfsCounter, 104 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 511 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 331 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:50,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 331 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 511 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:58:50,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16635 states. [2021-12-21 10:58:50,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16635 to 16627. [2021-12-21 10:58:50,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16627 states, 16626 states have (on average 1.094731143991339) internal successors, (18201), 16626 states have internal predecessors, (18201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:50,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16627 states to 16627 states and 18201 transitions. [2021-12-21 10:58:50,222 INFO L78 Accepts]: Start accepts. Automaton has 16627 states and 18201 transitions. Word has length 1067 [2021-12-21 10:58:50,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:50,223 INFO L470 AbstractCegarLoop]: Abstraction has 16627 states and 18201 transitions. [2021-12-21 10:58:50,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:50,223 INFO L276 IsEmpty]: Start isEmpty. Operand 16627 states and 18201 transitions. [2021-12-21 10:58:50,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1133 [2021-12-21 10:58:50,240 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:50,240 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-12-21 10:58:50,257 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 10:58:50,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-21 10:58:50,441 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:50,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:50,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1678456145, now seen corresponding path program 1 times [2021-12-21 10:58:50,441 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:50,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246109135] [2021-12-21 10:58:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:50,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 4049 backedges. 2161 proven. 0 refuted. 0 times theorem prover too weak. 1888 trivial. 0 not checked. [2021-12-21 10:58:50,795 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:50,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246109135] [2021-12-21 10:58:50,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246109135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:50,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:50,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 10:58:50,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505222360] [2021-12-21 10:58:50,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:50,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:50,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:50,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:50,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 10:58:50,797 INFO L87 Difference]: Start difference. First operand 16627 states and 18201 transitions. Second operand has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:51,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:51,200 INFO L93 Difference]: Finished difference Result 32510 states and 35607 transitions. [2021-12-21 10:58:51,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:51,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 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 1132 [2021-12-21 10:58:51,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:51,217 INFO L225 Difference]: With dead ends: 32510 [2021-12-21 10:58:51,218 INFO L226 Difference]: Without dead ends: 16253 [2021-12-21 10:58:51,229 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:51,231 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 155 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:51,231 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 34 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 10:58:51,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16253 states. [2021-12-21 10:58:51,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16253 to 16253. [2021-12-21 10:58:51,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16253 states, 16252 states have (on average 1.094203790302732) internal successors, (17783), 16252 states have internal predecessors, (17783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16253 states to 16253 states and 17783 transitions. [2021-12-21 10:58:51,422 INFO L78 Accepts]: Start accepts. Automaton has 16253 states and 17783 transitions. Word has length 1132 [2021-12-21 10:58:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:51,423 INFO L470 AbstractCegarLoop]: Abstraction has 16253 states and 17783 transitions. [2021-12-21 10:58:51,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 107.33333333333333) internal successors, (322), 2 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:51,424 INFO L276 IsEmpty]: Start isEmpty. Operand 16253 states and 17783 transitions. [2021-12-21 10:58:51,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1157 [2021-12-21 10:58:51,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:51,446 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:51,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-12-21 10:58:51,447 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:51,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:51,448 INFO L85 PathProgramCache]: Analyzing trace with hash 750491527, now seen corresponding path program 1 times [2021-12-21 10:58:51,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:51,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943524705] [2021-12-21 10:58:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:51,448 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:51,804 INFO L134 CoverageAnalysis]: Checked inductivity of 4066 backedges. 1501 proven. 0 refuted. 0 times theorem prover too weak. 2565 trivial. 0 not checked. [2021-12-21 10:58:51,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:51,804 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943524705] [2021-12-21 10:58:51,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943524705] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:51,804 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 10:58:51,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 10:58:51,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022112929] [2021-12-21 10:58:51,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:51,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 10:58:51,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:51,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 10:58:51,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-21 10:58:51,807 INFO L87 Difference]: Start difference. First operand 16253 states and 17783 transitions. Second operand has 4 states, 4 states have (on average 103.0) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:52,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:52,643 INFO L93 Difference]: Finished difference Result 32689 states and 35774 transitions. [2021-12-21 10:58:52,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-21 10:58:52,643 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 103.0) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 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 1156 [2021-12-21 10:58:52,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:52,656 INFO L225 Difference]: With dead ends: 32689 [2021-12-21 10:58:52,656 INFO L226 Difference]: Without dead ends: 16622 [2021-12-21 10:58:52,663 INFO L932 BasicCegarLoop]: 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 [2021-12-21 10:58:52,664 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 205 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 1011 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 1164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 1011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:52,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [205 Valid, 85 Invalid, 1164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 1011 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 10:58:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16622 states. [2021-12-21 10:58:52,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16622 to 16621. [2021-12-21 10:58:52,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16621 states, 16620 states have (on average 1.0927797833935018) internal successors, (18162), 16620 states have internal predecessors, (18162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:52,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16621 states to 16621 states and 18162 transitions. [2021-12-21 10:58:52,798 INFO L78 Accepts]: Start accepts. Automaton has 16621 states and 18162 transitions. Word has length 1156 [2021-12-21 10:58:52,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:52,799 INFO L470 AbstractCegarLoop]: Abstraction has 16621 states and 18162 transitions. [2021-12-21 10:58:52,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 103.0) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:52,799 INFO L276 IsEmpty]: Start isEmpty. Operand 16621 states and 18162 transitions. [2021-12-21 10:58:52,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1195 [2021-12-21 10:58:52,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:52,817 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:52,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 10:58:52,817 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:52,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:52,818 INFO L85 PathProgramCache]: Analyzing trace with hash 1701280617, now seen corresponding path program 1 times [2021-12-21 10:58:52,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:52,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824594219] [2021-12-21 10:58:52,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:52,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:53,163 INFO L134 CoverageAnalysis]: Checked inductivity of 4127 backedges. 2240 proven. 73 refuted. 0 times theorem prover too weak. 1814 trivial. 0 not checked. [2021-12-21 10:58:53,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:53,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824594219] [2021-12-21 10:58:53,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824594219] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:53,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5322522] [2021-12-21 10:58:53,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:53,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:53,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:53,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:58:53,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 10:58:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:53,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 1507 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 10:58:53,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:54,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4127 backedges. 2598 proven. 0 refuted. 0 times theorem prover too weak. 1529 trivial. 0 not checked. [2021-12-21 10:58:54,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:54,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5322522] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:54,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:54,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-21 10:58:54,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652641436] [2021-12-21 10:58:54,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:54,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:54,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:54,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:54,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:58:54,970 INFO L87 Difference]: Start difference. First operand 16621 states and 18162 transitions. Second operand has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:55,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:55,533 INFO L93 Difference]: Finished difference Result 37667 states and 41173 transitions. [2021-12-21 10:58:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:55,533 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 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 1194 [2021-12-21 10:58:55,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:55,549 INFO L225 Difference]: With dead ends: 37667 [2021-12-21 10:58:55,549 INFO L226 Difference]: Without dead ends: 21416 [2021-12-21 10:58:55,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1197 GetRequests, 1194 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-21 10:58:55,558 INFO L933 BasicCegarLoop]: 298 mSDtfsCounter, 77 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 505 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:55,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 319 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 505 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 10:58:55,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21416 states. [2021-12-21 10:58:55,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21416 to 16813. [2021-12-21 10:58:55,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16813 states, 16812 states have (on average 1.0874970259338568) internal successors, (18283), 16812 states have internal predecessors, (18283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:55,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16813 states to 16813 states and 18283 transitions. [2021-12-21 10:58:55,715 INFO L78 Accepts]: Start accepts. Automaton has 16813 states and 18283 transitions. Word has length 1194 [2021-12-21 10:58:55,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:55,715 INFO L470 AbstractCegarLoop]: Abstraction has 16813 states and 18283 transitions. [2021-12-21 10:58:55,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.66666666666666) internal successors, (440), 3 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:55,716 INFO L276 IsEmpty]: Start isEmpty. Operand 16813 states and 18283 transitions. [2021-12-21 10:58:55,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1356 [2021-12-21 10:58:55,736 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:55,736 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 10:58:55,753 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-21 10:58:55,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:55,937 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:55,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:55,937 INFO L85 PathProgramCache]: Analyzing trace with hash 164681189, now seen corresponding path program 1 times [2021-12-21 10:58:55,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:55,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208535544] [2021-12-21 10:58:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:55,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:56,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:56,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6001 backedges. 3683 proven. 811 refuted. 0 times theorem prover too weak. 1507 trivial. 0 not checked. [2021-12-21 10:58:56,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:56,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208535544] [2021-12-21 10:58:56,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208535544] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:56,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245247643] [2021-12-21 10:58:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:56,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:56,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:56,389 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:58:56,390 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-21 10:58:56,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:56,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 1728 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-21 10:58:56,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 10:58:58,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6001 backedges. 3704 proven. 0 refuted. 0 times theorem prover too weak. 2297 trivial. 0 not checked. [2021-12-21 10:58:58,451 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 10:58:58,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245247643] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 10:58:58,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 10:58:58,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-21 10:58:58,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039960802] [2021-12-21 10:58:58,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 10:58:58,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 10:58:58,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 10:58:58,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 10:58:58,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:58:58,453 INFO L87 Difference]: Start difference. First operand 16813 states and 18283 transitions. Second operand has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:58,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 10:58:58,959 INFO L93 Difference]: Finished difference Result 34734 states and 37759 transitions. [2021-12-21 10:58:58,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 10:58:58,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 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 1355 [2021-12-21 10:58:58,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 10:58:59,037 INFO L225 Difference]: With dead ends: 34734 [2021-12-21 10:58:59,037 INFO L226 Difference]: Without dead ends: 17923 [2021-12-21 10:58:59,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1362 GetRequests, 1357 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-12-21 10:58:59,041 INFO L933 BasicCegarLoop]: 325 mSDtfsCounter, 98 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 10:58:59,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 344 Invalid, 518 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 10:58:59,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17923 states. [2021-12-21 10:58:59,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17923 to 17921. [2021-12-21 10:58:59,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17921 states, 17920 states have (on average 1.0834263392857142) internal successors, (19415), 17920 states have internal predecessors, (19415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:59,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17921 states to 17921 states and 19415 transitions. [2021-12-21 10:58:59,211 INFO L78 Accepts]: Start accepts. Automaton has 17921 states and 19415 transitions. Word has length 1355 [2021-12-21 10:58:59,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 10:58:59,212 INFO L470 AbstractCegarLoop]: Abstraction has 17921 states and 19415 transitions. [2021-12-21 10:58:59,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.66666666666666) internal successors, (422), 3 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 10:58:59,213 INFO L276 IsEmpty]: Start isEmpty. Operand 17921 states and 19415 transitions. [2021-12-21 10:58:59,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1442 [2021-12-21 10:58:59,241 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 10:58:59,241 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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, 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] [2021-12-21 10:58:59,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-21 10:58:59,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:59,442 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 10:58:59,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 10:58:59,443 INFO L85 PathProgramCache]: Analyzing trace with hash -405637536, now seen corresponding path program 1 times [2021-12-21 10:58:59,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 10:58:59,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936956915] [2021-12-21 10:58:59,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:59,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 10:58:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:58:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6354 backedges. 3845 proven. 206 refuted. 0 times theorem prover too weak. 2303 trivial. 0 not checked. [2021-12-21 10:58:59,970 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 10:58:59,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936956915] [2021-12-21 10:58:59,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936956915] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 10:58:59,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211567061] [2021-12-21 10:58:59,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 10:58:59,971 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 10:58:59,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 10:58:59,972 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 10:59:00,007 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-21 10:59:00,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 10:59:00,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 1814 conjuncts, 21 conjunts are in the unsatisfiable core [2021-12-21 10:59:00,351 INFO L286 TraceCheckSpWp]: Computing forward predicates...