./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.BOUNDED-14.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/seq-mthreaded/pals_lcr.7.ufo.BOUNDED-14.pals.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 84bce40124007e6e483bf8a05621b58460eab347da71074e5760fdf76654ee7f --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:12:13,339 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:12:13,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:12:13,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:12:13,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:12:13,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:12:13,397 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:12:13,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:12:13,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:12:13,410 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:12:13,411 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:12:13,412 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:12:13,413 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:12:13,415 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:12:13,416 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:12:13,420 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:12:13,423 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:12:13,424 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:12:13,425 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:12:13,427 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:12:13,431 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:12:13,432 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:12:13,433 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:12:13,434 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:12:13,438 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:12:13,438 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:12:13,439 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:12:13,440 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:12:13,440 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:12:13,441 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:12:13,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:12:13,442 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:12:13,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:12:13,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:12:13,445 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:12:13,445 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:12:13,446 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:12:13,446 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:12:13,446 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:12:13,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:12:13,448 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:12:13,449 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:12:13,481 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:12:13,482 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:12:13,483 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:12:13,483 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:12:13,484 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:12:13,484 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:12:13,485 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:12:13,485 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:12:13,485 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:12:13,485 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:12:13,486 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:12:13,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:12:13,486 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:12:13,486 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:12:13,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:12:13,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:12:13,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:12:13,487 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:12:13,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:12:13,488 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:12:13,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:12:13,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:12:13,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:12:13,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:12:13,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:12:13,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:12:13,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:12:13,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:12:13,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:12:13,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:12:13,490 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:12:13,490 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:12:13,490 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:12:13,490 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 84bce40124007e6e483bf8a05621b58460eab347da71074e5760fdf76654ee7f [2021-12-28 01:12:13,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:12:13,813 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:12:13,816 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:12:13,817 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:12:13,818 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:12:13,820 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.BOUNDED-14.pals.c [2021-12-28 01:12:13,876 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3d09bbd7/baa8390fa0e04f04b1aa018c68e631e0/FLAG7fe4f83f1 [2021-12-28 01:12:14,284 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:12:14,284 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.7.ufo.BOUNDED-14.pals.c [2021-12-28 01:12:14,299 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3d09bbd7/baa8390fa0e04f04b1aa018c68e631e0/FLAG7fe4f83f1 [2021-12-28 01:12:14,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a3d09bbd7/baa8390fa0e04f04b1aa018c68e631e0 [2021-12-28 01:12:14,670 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:12:14,671 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:12:14,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:12:14,672 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:12:14,680 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:12:14,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:12:14" (1/1) ... [2021-12-28 01:12:14,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@259e5975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:14, skipping insertion in model container [2021-12-28 01:12:14,682 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:12:14" (1/1) ... [2021-12-28 01:12:14,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:12:14,730 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:12:14,990 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/seq-mthreaded/pals_lcr.7.ufo.BOUNDED-14.pals.c[20019,20032] [2021-12-28 01:12:14,992 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:12:15,002 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:12:15,084 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/seq-mthreaded/pals_lcr.7.ufo.BOUNDED-14.pals.c[20019,20032] [2021-12-28 01:12:15,086 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:12:15,102 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:12:15,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:15 WrapperNode [2021-12-28 01:12:15,103 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:12:15,105 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:12:15,105 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:12:15,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:12:15,111 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:15" (1/1) ... [2021-12-28 01:12:15,134 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:15" (1/1) ... [2021-12-28 01:12:15,177 INFO L137 Inliner]: procedures = 26, calls = 18, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 453 [2021-12-28 01:12:15,184 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:12:15,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:12:15,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:12:15,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:12:15,192 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:15" (1/1) ... [2021-12-28 01:12:15,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:15" (1/1) ... [2021-12-28 01:12:15,201 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:15" (1/1) ... [2021-12-28 01:12:15,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:15" (1/1) ... [2021-12-28 01:12:15,216 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:15" (1/1) ... [2021-12-28 01:12:15,226 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:15" (1/1) ... [2021-12-28 01:12:15,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:15" (1/1) ... [2021-12-28 01:12:15,231 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:12:15,232 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:12:15,232 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:12:15,232 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:12:15,233 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:15" (1/1) ... [2021-12-28 01:12:15,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:12:15,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:12:15,281 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) [2021-12-28 01:12:15,305 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 [2021-12-28 01:12:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:12:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:12:15,321 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:12:15,322 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:12:15,474 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:12:15,475 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:12:15,963 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:12:15,969 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:12:15,970 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 01:12:15,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:12:15 BoogieIcfgContainer [2021-12-28 01:12:15,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:12:15,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:12:15,975 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:12:15,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:12:15,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:12:14" (1/3) ... [2021-12-28 01:12:15,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24471e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:12:15, skipping insertion in model container [2021-12-28 01:12:15,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:12:15" (2/3) ... [2021-12-28 01:12:15,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24471e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:12:15, skipping insertion in model container [2021-12-28 01:12:15,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:12:15" (3/3) ... [2021-12-28 01:12:15,989 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.ufo.BOUNDED-14.pals.c [2021-12-28 01:12:15,993 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:12:15,993 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:12:16,037 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:12:16,044 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 [2021-12-28 01:12:16,045 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:12:16,066 INFO L276 IsEmpty]: Start isEmpty. Operand has 128 states, 126 states have (on average 1.753968253968254) internal successors, (221), 127 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:16,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 01:12:16,076 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:16,077 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] [2021-12-28 01:12:16,078 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:16,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:16,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1781508813, now seen corresponding path program 1 times [2021-12-28 01:12:16,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:16,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888677406] [2021-12-28 01:12:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:16,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:16,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:16,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888677406] [2021-12-28 01:12:16,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888677406] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:16,301 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:16,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 01:12:16,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421166976] [2021-12-28 01:12:16,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:16,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 01:12:16,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:16,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 01:12:16,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:12:16,341 INFO L87 Difference]: Start difference. First operand has 128 states, 126 states have (on average 1.753968253968254) internal successors, (221), 127 states have internal predecessors, (221), 0 states have call successors, (0), 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 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:16,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:16,379 INFO L93 Difference]: Finished difference Result 201 states and 336 transitions. [2021-12-28 01:12:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 01:12:16,382 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-28 01:12:16,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:16,392 INFO L225 Difference]: With dead ends: 201 [2021-12-28 01:12:16,392 INFO L226 Difference]: Without dead ends: 124 [2021-12-28 01:12:16,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 01:12:16,399 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:16,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-28 01:12:16,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-28 01:12:16,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.7398373983739837) internal successors, (214), 123 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:16,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 214 transitions. [2021-12-28 01:12:16,455 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 214 transitions. Word has length 41 [2021-12-28 01:12:16,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:16,456 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 214 transitions. [2021-12-28 01:12:16,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 20.5) internal successors, (41), 2 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:16,456 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 214 transitions. [2021-12-28 01:12:16,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-28 01:12:16,457 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:16,457 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] [2021-12-28 01:12:16,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:12:16,458 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:16,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:16,459 INFO L85 PathProgramCache]: Analyzing trace with hash 2119091697, now seen corresponding path program 1 times [2021-12-28 01:12:16,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:16,463 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605317261] [2021-12-28 01:12:16,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:16,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:16,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:16,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:16,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605317261] [2021-12-28 01:12:16,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605317261] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:16,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:16,578 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:12:16,578 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758687729] [2021-12-28 01:12:16,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:16,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:12:16,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:16,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:12:16,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:12:16,581 INFO L87 Difference]: Start difference. First operand 124 states and 214 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:16,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:16,670 INFO L93 Difference]: Finished difference Result 196 states and 326 transitions. [2021-12-28 01:12:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:12:16,671 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-12-28 01:12:16,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:16,672 INFO L225 Difference]: With dead ends: 196 [2021-12-28 01:12:16,672 INFO L226 Difference]: Without dead ends: 124 [2021-12-28 01:12:16,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:12:16,674 INFO L933 BasicCegarLoop]: 212 mSDtfsCounter, 3 mSDsluCounter, 583 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 795 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:16,675 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 795 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:12:16,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-12-28 01:12:16,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2021-12-28 01:12:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.3333333333333333) internal successors, (164), 123 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 164 transitions. [2021-12-28 01:12:16,682 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 164 transitions. Word has length 41 [2021-12-28 01:12:16,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:16,683 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 164 transitions. [2021-12-28 01:12:16,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 164 transitions. [2021-12-28 01:12:16,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:12:16,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:16,686 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:16,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:12:16,686 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:16,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:16,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1557003755, now seen corresponding path program 1 times [2021-12-28 01:12:16,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:16,687 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354824613] [2021-12-28 01:12:16,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:16,688 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:16,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:16,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:16,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354824613] [2021-12-28 01:12:16,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354824613] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:16,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:16,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:16,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616071284] [2021-12-28 01:12:16,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:16,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:16,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:16,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:16,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:16,860 INFO L87 Difference]: Start difference. First operand 124 states and 164 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:16,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:16,885 INFO L93 Difference]: Finished difference Result 254 states and 370 transitions. [2021-12-28 01:12:16,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:16,886 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-28 01:12:16,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:16,887 INFO L225 Difference]: With dead ends: 254 [2021-12-28 01:12:16,887 INFO L226 Difference]: Without dead ends: 186 [2021-12-28 01:12:16,888 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 [2021-12-28 01:12:16,889 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 98 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:16,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 364 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:16,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-12-28 01:12:16,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-12-28 01:12:16,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.4207650273224044) internal successors, (260), 183 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 260 transitions. [2021-12-28 01:12:16,902 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 260 transitions. Word has length 90 [2021-12-28 01:12:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:16,902 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 260 transitions. [2021-12-28 01:12:16,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 260 transitions. [2021-12-28 01:12:16,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:12:16,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:16,905 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:16,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:12:16,906 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:16,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:16,907 INFO L85 PathProgramCache]: Analyzing trace with hash -309494901, now seen corresponding path program 1 times [2021-12-28 01:12:16,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:16,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452216518] [2021-12-28 01:12:16,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:16,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:16,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:16,969 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:16,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452216518] [2021-12-28 01:12:16,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452216518] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:16,970 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:16,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:16,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670662030] [2021-12-28 01:12:16,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:16,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:16,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:16,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:16,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:16,972 INFO L87 Difference]: Start difference. First operand 184 states and 260 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:16,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:16,993 INFO L93 Difference]: Finished difference Result 428 states and 648 transitions. [2021-12-28 01:12:16,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:16,993 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-28 01:12:16,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:16,995 INFO L225 Difference]: With dead ends: 428 [2021-12-28 01:12:16,996 INFO L226 Difference]: Without dead ends: 300 [2021-12-28 01:12:16,996 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 [2021-12-28 01:12:16,998 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 94 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:16,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 363 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:16,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-12-28 01:12:17,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 298. [2021-12-28 01:12:17,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 297 states have (on average 1.4848484848484849) internal successors, (441), 297 states have internal predecessors, (441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:17,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 441 transitions. [2021-12-28 01:12:17,024 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 441 transitions. Word has length 90 [2021-12-28 01:12:17,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:17,025 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 441 transitions. [2021-12-28 01:12:17,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:17,025 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 441 transitions. [2021-12-28 01:12:17,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:12:17,027 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:17,028 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:17,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:12:17,028 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:17,029 INFO L85 PathProgramCache]: Analyzing trace with hash -1050927103, now seen corresponding path program 1 times [2021-12-28 01:12:17,029 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:17,029 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945052316] [2021-12-28 01:12:17,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:17,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:17,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:17,141 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:17,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945052316] [2021-12-28 01:12:17,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945052316] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:17,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:17,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:17,142 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327889586] [2021-12-28 01:12:17,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:17,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:17,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:17,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:17,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:17,143 INFO L87 Difference]: Start difference. First operand 298 states and 441 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:17,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:17,190 INFO L93 Difference]: Finished difference Result 758 states and 1171 transitions. [2021-12-28 01:12:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:17,201 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-28 01:12:17,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:17,204 INFO L225 Difference]: With dead ends: 758 [2021-12-28 01:12:17,205 INFO L226 Difference]: Without dead ends: 516 [2021-12-28 01:12:17,206 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 [2021-12-28 01:12:17,207 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 90 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:17,207 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 362 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:17,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-12-28 01:12:17,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 514. [2021-12-28 01:12:17,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 514 states, 513 states have (on average 1.5224171539961013) internal successors, (781), 513 states have internal predecessors, (781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:17,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 514 states to 514 states and 781 transitions. [2021-12-28 01:12:17,276 INFO L78 Accepts]: Start accepts. Automaton has 514 states and 781 transitions. Word has length 90 [2021-12-28 01:12:17,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:17,276 INFO L470 AbstractCegarLoop]: Abstraction has 514 states and 781 transitions. [2021-12-28 01:12:17,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 514 states and 781 transitions. [2021-12-28 01:12:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:12:17,282 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:17,282 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:17,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:12:17,285 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:17,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:17,285 INFO L85 PathProgramCache]: Analyzing trace with hash -1796509833, now seen corresponding path program 1 times [2021-12-28 01:12:17,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:17,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000417847] [2021-12-28 01:12:17,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:17,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:17,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:17,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:17,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000417847] [2021-12-28 01:12:17,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000417847] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:17,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:17,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:17,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657054123] [2021-12-28 01:12:17,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:17,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:17,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:17,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:17,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:17,350 INFO L87 Difference]: Start difference. First operand 514 states and 781 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:17,414 INFO L93 Difference]: Finished difference Result 1382 states and 2151 transitions. [2021-12-28 01:12:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:17,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-28 01:12:17,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:17,424 INFO L225 Difference]: With dead ends: 1382 [2021-12-28 01:12:17,424 INFO L226 Difference]: Without dead ends: 924 [2021-12-28 01:12:17,426 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 [2021-12-28 01:12:17,427 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 86 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:17,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 361 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:17,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 924 states. [2021-12-28 01:12:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 924 to 922. [2021-12-28 01:12:17,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 1.5385450597176982) internal successors, (1417), 921 states have internal predecessors, (1417), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1417 transitions. [2021-12-28 01:12:17,502 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1417 transitions. Word has length 90 [2021-12-28 01:12:17,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:17,503 INFO L470 AbstractCegarLoop]: Abstraction has 922 states and 1417 transitions. [2021-12-28 01:12:17,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:17,503 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1417 transitions. [2021-12-28 01:12:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:12:17,505 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:17,505 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:17,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:12:17,505 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:17,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash -259221845, now seen corresponding path program 1 times [2021-12-28 01:12:17,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:17,506 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125644134] [2021-12-28 01:12:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:17,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:17,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:17,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:17,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125644134] [2021-12-28 01:12:17,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125644134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:17,571 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:17,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:17,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276645677] [2021-12-28 01:12:17,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:17,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:17,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:17,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:17,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:17,573 INFO L87 Difference]: Start difference. First operand 922 states and 1417 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:17,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:17,650 INFO L93 Difference]: Finished difference Result 2558 states and 3979 transitions. [2021-12-28 01:12:17,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:17,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-28 01:12:17,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:17,660 INFO L225 Difference]: With dead ends: 2558 [2021-12-28 01:12:17,660 INFO L226 Difference]: Without dead ends: 1692 [2021-12-28 01:12:17,661 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 [2021-12-28 01:12:17,668 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 82 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:17,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 360 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:17,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-12-28 01:12:17,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 1690. [2021-12-28 01:12:17,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1690 states, 1689 states have (on average 1.5399644760213145) internal successors, (2601), 1689 states have internal predecessors, (2601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1690 states to 1690 states and 2601 transitions. [2021-12-28 01:12:17,755 INFO L78 Accepts]: Start accepts. Automaton has 1690 states and 2601 transitions. Word has length 90 [2021-12-28 01:12:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:17,758 INFO L470 AbstractCegarLoop]: Abstraction has 1690 states and 2601 transitions. [2021-12-28 01:12:17,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:17,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1690 states and 2601 transitions. [2021-12-28 01:12:17,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:12:17,760 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:17,761 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:17,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:12:17,761 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:17,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:17,762 INFO L85 PathProgramCache]: Analyzing trace with hash 1420392415, now seen corresponding path program 1 times [2021-12-28 01:12:17,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:17,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73631937] [2021-12-28 01:12:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:17,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:17,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:17,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73631937] [2021-12-28 01:12:17,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73631937] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:17,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:17,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:17,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143278506] [2021-12-28 01:12:17,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:17,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:17,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:17,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:17,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:17,852 INFO L87 Difference]: Start difference. First operand 1690 states and 2601 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:17,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:17,977 INFO L93 Difference]: Finished difference Result 4766 states and 7371 transitions. [2021-12-28 01:12:17,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:17,978 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-28 01:12:17,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:17,989 INFO L225 Difference]: With dead ends: 4766 [2021-12-28 01:12:17,990 INFO L226 Difference]: Without dead ends: 3132 [2021-12-28 01:12:17,992 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 [2021-12-28 01:12:17,994 INFO L933 BasicCegarLoop]: 233 mSDtfsCounter, 78 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 359 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:17,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 359 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:17,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3132 states. [2021-12-28 01:12:18,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3132 to 3130. [2021-12-28 01:12:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3130 states, 3129 states have (on average 1.531799296899968) internal successors, (4793), 3129 states have internal predecessors, (4793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:18,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3130 states to 3130 states and 4793 transitions. [2021-12-28 01:12:18,155 INFO L78 Accepts]: Start accepts. Automaton has 3130 states and 4793 transitions. Word has length 90 [2021-12-28 01:12:18,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:18,161 INFO L470 AbstractCegarLoop]: Abstraction has 3130 states and 4793 transitions. [2021-12-28 01:12:18,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:18,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3130 states and 4793 transitions. [2021-12-28 01:12:18,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:12:18,163 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:18,164 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:18,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:12:18,164 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:18,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:18,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1758185557, now seen corresponding path program 1 times [2021-12-28 01:12:18,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:18,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71043519] [2021-12-28 01:12:18,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:18,170 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:18,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:18,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:18,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:18,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71043519] [2021-12-28 01:12:18,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71043519] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:18,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:18,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:18,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103628273] [2021-12-28 01:12:18,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:18,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:18,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:18,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:18,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:18,249 INFO L87 Difference]: Start difference. First operand 3130 states and 4793 transitions. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:18,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:18,481 INFO L93 Difference]: Finished difference Result 8894 states and 13627 transitions. [2021-12-28 01:12:18,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:18,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-28 01:12:18,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:18,504 INFO L225 Difference]: With dead ends: 8894 [2021-12-28 01:12:18,504 INFO L226 Difference]: Without dead ends: 5820 [2021-12-28 01:12:18,508 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 [2021-12-28 01:12:18,510 INFO L933 BasicCegarLoop]: 228 mSDtfsCounter, 74 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:18,511 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 358 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:18,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-12-28 01:12:18,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 5818. [2021-12-28 01:12:18,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5818 states, 5817 states have (on average 1.5171050369606327) internal successors, (8825), 5817 states have internal predecessors, (8825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:18,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5818 states to 5818 states and 8825 transitions. [2021-12-28 01:12:18,815 INFO L78 Accepts]: Start accepts. Automaton has 5818 states and 8825 transitions. Word has length 90 [2021-12-28 01:12:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:18,815 INFO L470 AbstractCegarLoop]: Abstraction has 5818 states and 8825 transitions. [2021-12-28 01:12:18,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:18,816 INFO L276 IsEmpty]: Start isEmpty. Operand 5818 states and 8825 transitions. [2021-12-28 01:12:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-12-28 01:12:18,816 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:18,817 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:18,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:12:18,817 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:18,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:18,818 INFO L85 PathProgramCache]: Analyzing trace with hash -1318796341, now seen corresponding path program 1 times [2021-12-28 01:12:18,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:18,818 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960909793] [2021-12-28 01:12:18,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:18,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:18,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:18,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:18,958 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:18,958 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960909793] [2021-12-28 01:12:18,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960909793] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:18,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:18,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:12:18,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965272723] [2021-12-28 01:12:18,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:18,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:12:18,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:18,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:12:18,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:12:18,960 INFO L87 Difference]: Start difference. First operand 5818 states and 8825 transitions. Second operand has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:22,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:22,718 INFO L93 Difference]: Finished difference Result 86486 states and 131591 transitions. [2021-12-28 01:12:22,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-28 01:12:22,718 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 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 90 [2021-12-28 01:12:22,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:22,990 INFO L225 Difference]: With dead ends: 86486 [2021-12-28 01:12:22,990 INFO L226 Difference]: Without dead ends: 80724 [2021-12-28 01:12:23,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-12-28 01:12:23,115 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 3049 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3049 SdHoareTripleChecker+Valid, 1799 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:23,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3049 Valid, 1799 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-28 01:12:23,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80724 states. [2021-12-28 01:12:24,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80724 to 11578. [2021-12-28 01:12:24,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 1.4975382223373932) internal successors, (17337), 11577 states have internal predecessors, (17337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:24,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 17337 transitions. [2021-12-28 01:12:24,669 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 17337 transitions. Word has length 90 [2021-12-28 01:12:24,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:24,669 INFO L470 AbstractCegarLoop]: Abstraction has 11578 states and 17337 transitions. [2021-12-28 01:12:24,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.0) internal successors, (90), 9 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:24,670 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 17337 transitions. [2021-12-28 01:12:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-28 01:12:24,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:24,671 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:24,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:12:24,672 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:24,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:24,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1697127869, now seen corresponding path program 1 times [2021-12-28 01:12:24,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:24,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171781266] [2021-12-28 01:12:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:24,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:24,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:24,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:24,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171781266] [2021-12-28 01:12:24,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171781266] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:24,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:24,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:12:24,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87553978] [2021-12-28 01:12:24,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:24,954 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:12:24,954 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:24,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:12:24,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:12:24,955 INFO L87 Difference]: Start difference. First operand 11578 states and 17337 transitions. Second operand has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:26,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:26,134 INFO L93 Difference]: Finished difference Result 23102 states and 34619 transitions. [2021-12-28 01:12:26,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:12:26,135 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-12-28 01:12:26,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:26,158 INFO L225 Difference]: With dead ends: 23102 [2021-12-28 01:12:26,158 INFO L226 Difference]: Without dead ends: 11580 [2021-12-28 01:12:26,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-12-28 01:12:26,176 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 749 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:26,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 785 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:12:26,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11580 states. [2021-12-28 01:12:27,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11580 to 11578. [2021-12-28 01:12:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11578 states, 11577 states have (on average 1.4864818173965622) internal successors, (17209), 11577 states have internal predecessors, (17209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:27,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11578 states to 11578 states and 17209 transitions. [2021-12-28 01:12:27,278 INFO L78 Accepts]: Start accepts. Automaton has 11578 states and 17209 transitions. Word has length 92 [2021-12-28 01:12:27,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:27,278 INFO L470 AbstractCegarLoop]: Abstraction has 11578 states and 17209 transitions. [2021-12-28 01:12:27,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.222222222222221) internal successors, (92), 9 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:27,279 INFO L276 IsEmpty]: Start isEmpty. Operand 11578 states and 17209 transitions. [2021-12-28 01:12:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-12-28 01:12:27,280 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:27,280 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:27,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:12:27,281 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:27,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:27,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1763621381, now seen corresponding path program 1 times [2021-12-28 01:12:27,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:27,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511170726] [2021-12-28 01:12:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:27,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:27,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:27,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511170726] [2021-12-28 01:12:27,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511170726] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:27,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:27,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:12:27,330 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41118831] [2021-12-28 01:12:27,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:27,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:12:27,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:27,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:12:27,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:12:27,331 INFO L87 Difference]: Start difference. First operand 11578 states and 17209 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:28,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:28,365 INFO L93 Difference]: Finished difference Result 28544 states and 42429 transitions. [2021-12-28 01:12:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:12:28,365 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 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 92 [2021-12-28 01:12:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:28,399 INFO L225 Difference]: With dead ends: 28544 [2021-12-28 01:12:28,399 INFO L226 Difference]: Without dead ends: 17022 [2021-12-28 01:12:28,420 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 [2021-12-28 01:12:28,420 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 66 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:28,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 314 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:28,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17022 states. [2021-12-28 01:12:29,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17022 to 17020. [2021-12-28 01:12:29,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17019 states have (on average 1.473823373876256) internal successors, (25083), 17019 states have internal predecessors, (25083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:29,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 25083 transitions. [2021-12-28 01:12:29,520 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 25083 transitions. Word has length 92 [2021-12-28 01:12:29,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:29,521 INFO L470 AbstractCegarLoop]: Abstraction has 17020 states and 25083 transitions. [2021-12-28 01:12:29,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:29,521 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 25083 transitions. [2021-12-28 01:12:29,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 01:12:29,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:29,522 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:29,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:12:29,522 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:29,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:29,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1486079254, now seen corresponding path program 1 times [2021-12-28 01:12:29,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:29,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622059486] [2021-12-28 01:12:29,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:29,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:29,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:29,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622059486] [2021-12-28 01:12:29,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622059486] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:29,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:29,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:12:29,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081085129] [2021-12-28 01:12:29,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:29,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:12:29,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:29,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:12:29,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:12:29,608 INFO L87 Difference]: Start difference. First operand 17020 states and 25083 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:30,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:30,731 INFO L93 Difference]: Finished difference Result 33982 states and 50108 transitions. [2021-12-28 01:12:30,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:12:30,731 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-28 01:12:30,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:30,761 INFO L225 Difference]: With dead ends: 33982 [2021-12-28 01:12:30,762 INFO L226 Difference]: Without dead ends: 17020 [2021-12-28 01:12:30,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:12:30,781 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 525 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 525 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:30,781 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [525 Valid, 190 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:12:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17020 states. [2021-12-28 01:12:31,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17020 to 17020. [2021-12-28 01:12:31,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17019 states have (on average 1.4625418649744404) internal successors, (24891), 17019 states have internal predecessors, (24891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:31,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 24891 transitions. [2021-12-28 01:12:31,884 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 24891 transitions. Word has length 93 [2021-12-28 01:12:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:31,884 INFO L470 AbstractCegarLoop]: Abstraction has 17020 states and 24891 transitions. [2021-12-28 01:12:31,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 24891 transitions. [2021-12-28 01:12:31,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 01:12:31,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:31,886 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:31,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:12:31,886 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:31,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:31,887 INFO L85 PathProgramCache]: Analyzing trace with hash 202864488, now seen corresponding path program 1 times [2021-12-28 01:12:31,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:31,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397959479] [2021-12-28 01:12:31,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:31,888 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:31,952 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:31,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397959479] [2021-12-28 01:12:31,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397959479] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:31,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:31,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:12:31,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644852103] [2021-12-28 01:12:31,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:31,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 01:12:31,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:31,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 01:12:31,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:12:31,954 INFO L87 Difference]: Start difference. First operand 17020 states and 24891 transitions. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:33,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:33,531 INFO L93 Difference]: Finished difference Result 33982 states and 49724 transitions. [2021-12-28 01:12:33,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:12:33,532 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-28 01:12:33,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:33,559 INFO L225 Difference]: With dead ends: 33982 [2021-12-28 01:12:33,559 INFO L226 Difference]: Without dead ends: 17020 [2021-12-28 01:12:33,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:12:33,584 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 557 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:33,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [557 Valid, 195 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:12:33,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17020 states. [2021-12-28 01:12:34,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17020 to 17020. [2021-12-28 01:12:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17020 states, 17019 states have (on average 1.4512603560726247) internal successors, (24699), 17019 states have internal predecessors, (24699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17020 states to 17020 states and 24699 transitions. [2021-12-28 01:12:34,788 INFO L78 Accepts]: Start accepts. Automaton has 17020 states and 24699 transitions. Word has length 93 [2021-12-28 01:12:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:34,789 INFO L470 AbstractCegarLoop]: Abstraction has 17020 states and 24699 transitions. [2021-12-28 01:12:34,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 17020 states and 24699 transitions. [2021-12-28 01:12:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-12-28 01:12:34,790 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:34,790 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:34,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:12:34,790 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:34,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:34,791 INFO L85 PathProgramCache]: Analyzing trace with hash 2008302822, now seen corresponding path program 1 times [2021-12-28 01:12:34,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:34,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100360468] [2021-12-28 01:12:34,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:34,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:34,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:34,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:12:34,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:34,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100360468] [2021-12-28 01:12:34,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100360468] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:34,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:34,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:12:34,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975715222] [2021-12-28 01:12:34,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:34,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:12:34,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:34,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:12:34,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:12:34,850 INFO L87 Difference]: Start difference. First operand 17020 states and 24699 transitions. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:37,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:37,201 INFO L93 Difference]: Finished difference Result 31519 states and 45297 transitions. [2021-12-28 01:12:37,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-28 01:12:37,202 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 93 [2021-12-28 01:12:37,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:37,248 INFO L225 Difference]: With dead ends: 31519 [2021-12-28 01:12:37,248 INFO L226 Difference]: Without dead ends: 31517 [2021-12-28 01:12:37,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:12:37,258 INFO L933 BasicCegarLoop]: 197 mSDtfsCounter, 289 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:37,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 676 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:12:37,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31517 states. [2021-12-28 01:12:38,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31517 to 17788. [2021-12-28 01:12:38,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17788 states, 17787 states have (on average 1.4281778827233373) internal successors, (25403), 17787 states have internal predecessors, (25403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:38,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17788 states to 17788 states and 25403 transitions. [2021-12-28 01:12:38,618 INFO L78 Accepts]: Start accepts. Automaton has 17788 states and 25403 transitions. Word has length 93 [2021-12-28 01:12:38,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:38,619 INFO L470 AbstractCegarLoop]: Abstraction has 17788 states and 25403 transitions. [2021-12-28 01:12:38,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:38,619 INFO L276 IsEmpty]: Start isEmpty. Operand 17788 states and 25403 transitions. [2021-12-28 01:12:38,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-28 01:12:38,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:38,629 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:38,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:12:38,629 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:38,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:38,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1787662099, now seen corresponding path program 1 times [2021-12-28 01:12:38,630 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:38,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746101374] [2021-12-28 01:12:38,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:38,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:38,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:38,719 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-28 01:12:38,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:38,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746101374] [2021-12-28 01:12:38,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746101374] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:38,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:38,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:12:38,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160720063] [2021-12-28 01:12:38,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:38,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:12:38,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:38,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:12:38,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:12:38,721 INFO L87 Difference]: Start difference. First operand 17788 states and 25403 transitions. Second operand has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:47,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:12:47,367 INFO L93 Difference]: Finished difference Result 145356 states and 207555 transitions. [2021-12-28 01:12:47,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-28 01:12:47,367 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 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 129 [2021-12-28 01:12:47,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:12:47,725 INFO L225 Difference]: With dead ends: 145356 [2021-12-28 01:12:47,726 INFO L226 Difference]: Without dead ends: 127626 [2021-12-28 01:12:47,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-28 01:12:47,768 INFO L933 BasicCegarLoop]: 258 mSDtfsCounter, 2142 mSDsluCounter, 953 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2142 SdHoareTripleChecker+Valid, 1211 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:12:47,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2142 Valid, 1211 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:12:47,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127626 states. [2021-12-28 01:12:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127626 to 35516. [2021-12-28 01:12:51,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35516 states, 35515 states have (on average 1.4234830353371815) internal successors, (50555), 35515 states have internal predecessors, (50555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:51,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35516 states to 35516 states and 50555 transitions. [2021-12-28 01:12:51,347 INFO L78 Accepts]: Start accepts. Automaton has 35516 states and 50555 transitions. Word has length 129 [2021-12-28 01:12:51,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:12:51,348 INFO L470 AbstractCegarLoop]: Abstraction has 35516 states and 50555 transitions. [2021-12-28 01:12:51,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.555555555555555) internal successors, (122), 9 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:12:51,348 INFO L276 IsEmpty]: Start isEmpty. Operand 35516 states and 50555 transitions. [2021-12-28 01:12:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-12-28 01:12:51,361 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:12:51,361 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:12:51,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:12:51,362 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:12:51,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:12:51,362 INFO L85 PathProgramCache]: Analyzing trace with hash 18879283, now seen corresponding path program 1 times [2021-12-28 01:12:51,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:12:51,363 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947330190] [2021-12-28 01:12:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:12:51,363 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:12:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:12:51,459 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-28 01:12:51,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:12:51,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947330190] [2021-12-28 01:12:51,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947330190] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:12:51,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:12:51,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-28 01:12:51,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176530799] [2021-12-28 01:12:51,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:12:51,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-28 01:12:51,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:12:51,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-28 01:12:51,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-28 01:12:51,462 INFO L87 Difference]: Start difference. First operand 35516 states and 50555 transitions. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)