./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem17_label06.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem17_label06.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 e9764aa77a297d88a5c4424b1d4363c7dc0ea34b016b7ff505243e4a2273d457 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 22:59:06,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 22:59:06,218 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 22:59:06,244 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 22:59:06,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 22:59:06,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 22:59:06,249 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 22:59:06,254 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 22:59:06,255 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 22:59:06,260 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 22:59:06,261 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 22:59:06,262 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 22:59:06,262 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 22:59:06,264 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 22:59:06,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 22:59:06,270 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 22:59:06,272 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 22:59:06,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 22:59:06,274 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 22:59:06,277 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 22:59:06,280 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 22:59:06,281 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 22:59:06,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 22:59:06,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 22:59:06,286 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 22:59:06,286 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 22:59:06,286 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 22:59:06,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 22:59:06,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 22:59:06,288 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 22:59:06,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 22:59:06,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 22:59:06,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 22:59:06,292 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 22:59:06,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 22:59:06,293 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 22:59:06,293 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 22:59:06,293 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 22:59:06,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 22:59:06,294 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 22:59:06,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 22:59:06,296 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 22:59:06,325 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 22:59:06,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 22:59:06,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 22:59:06,326 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 22:59:06,327 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 22:59:06,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 22:59:06,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 22:59:06,328 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 22:59:06,328 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 22:59:06,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 22:59:06,329 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 22:59:06,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 22:59:06,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 22:59:06,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 22:59:06,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 22:59:06,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 22:59:06,330 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 22:59:06,330 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 22:59:06,331 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 22:59:06,331 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 22:59:06,331 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 22:59:06,331 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 22:59:06,331 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 22:59:06,331 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 22:59:06,332 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:59:06,332 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 22:59:06,332 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 22:59:06,332 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 22:59:06,333 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 22:59:06,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 22:59:06,334 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 22:59:06,334 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 22:59:06,334 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 22:59:06,334 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 22:59:06,334 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e9764aa77a297d88a5c4424b1d4363c7dc0ea34b016b7ff505243e4a2273d457 [2021-12-15 22:59:06,541 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 22:59:06,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 22:59:06,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 22:59:06,572 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 22:59:06,572 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 22:59:06,573 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem17_label06.c [2021-12-15 22:59:06,636 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b52da13b/3cad33172f0744efb5d6b55f0164172b/FLAG58a09393e [2021-12-15 22:59:07,081 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 22:59:07,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label06.c [2021-12-15 22:59:07,099 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b52da13b/3cad33172f0744efb5d6b55f0164172b/FLAG58a09393e [2021-12-15 22:59:07,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2b52da13b/3cad33172f0744efb5d6b55f0164172b [2021-12-15 22:59:07,405 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 22:59:07,407 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 22:59:07,408 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 22:59:07,408 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 22:59:07,410 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 22:59:07,411 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:59:07" (1/1) ... [2021-12-15 22:59:07,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f4bde12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:07, skipping insertion in model container [2021-12-15 22:59:07,412 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 10:59:07" (1/1) ... [2021-12-15 22:59:07,417 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 22:59:07,476 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 22:59:07,690 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label06.c[4782,4795] [2021-12-15 22:59:08,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:59:08,143 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 22:59:08,168 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem17_label06.c[4782,4795] [2021-12-15 22:59:08,322 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 22:59:08,335 INFO L208 MainTranslator]: Completed translation [2021-12-15 22:59:08,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:08 WrapperNode [2021-12-15 22:59:08,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 22:59:08,336 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 22:59:08,336 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 22:59:08,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 22:59:08,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:08" (1/1) ... [2021-12-15 22:59:08,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:08" (1/1) ... [2021-12-15 22:59:08,588 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-12-15 22:59:08,589 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 22:59:08,589 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 22:59:08,590 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 22:59:08,590 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 22:59:08,595 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:08" (1/1) ... [2021-12-15 22:59:08,595 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:08" (1/1) ... [2021-12-15 22:59:08,631 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:08" (1/1) ... [2021-12-15 22:59:08,631 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:08" (1/1) ... [2021-12-15 22:59:08,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:08" (1/1) ... [2021-12-15 22:59:08,766 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:08" (1/1) ... [2021-12-15 22:59:08,779 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:08" (1/1) ... [2021-12-15 22:59:08,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 22:59:08,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 22:59:08,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 22:59:08,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 22:59:08,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:08" (1/1) ... [2021-12-15 22:59:08,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 22:59:08,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:59:08,911 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) [2021-12-15 22:59:08,919 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 [2021-12-15 22:59:08,941 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 22:59:08,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 22:59:08,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 22:59:08,942 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 22:59:08,987 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 22:59:08,988 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 22:59:11,247 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 22:59:11,259 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 22:59:11,260 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 22:59:11,263 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:59:11 BoogieIcfgContainer [2021-12-15 22:59:11,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 22:59:11,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 22:59:11,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 22:59:11,266 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 22:59:11,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 10:59:07" (1/3) ... [2021-12-15 22:59:11,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b33c9a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:59:11, skipping insertion in model container [2021-12-15 22:59:11,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 10:59:08" (2/3) ... [2021-12-15 22:59:11,268 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b33c9a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 10:59:11, skipping insertion in model container [2021-12-15 22:59:11,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 10:59:11" (3/3) ... [2021-12-15 22:59:11,270 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label06.c [2021-12-15 22:59:11,274 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 22:59:11,274 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 22:59:11,317 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 22:59:11,322 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 [2021-12-15 22:59:11,322 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 22:59:11,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:11,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-12-15 22:59:11,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:11,342 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] [2021-12-15 22:59:11,342 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:11,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:11,346 INFO L85 PathProgramCache]: Analyzing trace with hash -1843609039, now seen corresponding path program 1 times [2021-12-15 22:59:11,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:11,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74528533] [2021-12-15 22:59:11,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:11,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:11,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:11,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:11,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74528533] [2021-12-15 22:59:11,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74528533] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:11,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:11,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:59:11,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785937115] [2021-12-15 22:59:11,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:11,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:11,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:11,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:11,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:11,505 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:13,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:13,681 INFO L93 Difference]: Finished difference Result 1642 states and 3024 transitions. [2021-12-15 22:59:13,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:13,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-12-15 22:59:13,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:13,697 INFO L225 Difference]: With dead ends: 1642 [2021-12-15 22:59:13,697 INFO L226 Difference]: Without dead ends: 975 [2021-12-15 22:59:13,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:13,704 INFO L933 BasicCegarLoop]: 474 mSDtfsCounter, 459 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 372 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 459 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 372 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:13,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [459 Valid, 550 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [372 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 22:59:13,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-12-15 22:59:13,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 972. [2021-12-15 22:59:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 972 states, 971 states have (on average 1.5077239958805355) internal successors, (1464), 971 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:13,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 972 states to 972 states and 1464 transitions. [2021-12-15 22:59:13,766 INFO L78 Accepts]: Start accepts. Automaton has 972 states and 1464 transitions. Word has length 31 [2021-12-15 22:59:13,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:13,767 INFO L470 AbstractCegarLoop]: Abstraction has 972 states and 1464 transitions. [2021-12-15 22:59:13,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 2 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:13,767 INFO L276 IsEmpty]: Start isEmpty. Operand 972 states and 1464 transitions. [2021-12-15 22:59:13,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-12-15 22:59:13,769 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:13,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:13,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 22:59:13,770 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:13,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:13,771 INFO L85 PathProgramCache]: Analyzing trace with hash 1041259748, now seen corresponding path program 1 times [2021-12-15 22:59:13,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:13,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641856284] [2021-12-15 22:59:13,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:13,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:13,860 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:13,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:13,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641856284] [2021-12-15 22:59:13,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641856284] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:13,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:13,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:13,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700192385] [2021-12-15 22:59:13,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:13,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:13,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:13,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:13,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:13,873 INFO L87 Difference]: Start difference. First operand 972 states and 1464 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:15,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:15,766 INFO L93 Difference]: Finished difference Result 2814 states and 4242 transitions. [2021-12-15 22:59:15,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:15,767 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-12-15 22:59:15,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:15,772 INFO L225 Difference]: With dead ends: 2814 [2021-12-15 22:59:15,773 INFO L226 Difference]: Without dead ends: 1844 [2021-12-15 22:59:15,774 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 [2021-12-15 22:59:15,775 INFO L933 BasicCegarLoop]: 853 mSDtfsCounter, 460 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1283 mSolverCounterSat, 414 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 921 SdHoareTripleChecker+Invalid, 1697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 414 IncrementalHoareTripleChecker+Valid, 1283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:15,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [460 Valid, 921 Invalid, 1697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [414 Valid, 1283 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2021-12-15 22:59:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1844 states. [2021-12-15 22:59:15,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1844 to 1842. [2021-12-15 22:59:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1842 states, 1841 states have (on average 1.3601303639326452) internal successors, (2504), 1841 states have internal predecessors, (2504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:15,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1842 states to 1842 states and 2504 transitions. [2021-12-15 22:59:15,815 INFO L78 Accepts]: Start accepts. Automaton has 1842 states and 2504 transitions. Word has length 101 [2021-12-15 22:59:15,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:15,817 INFO L470 AbstractCegarLoop]: Abstraction has 1842 states and 2504 transitions. [2021-12-15 22:59:15,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:15,817 INFO L276 IsEmpty]: Start isEmpty. Operand 1842 states and 2504 transitions. [2021-12-15 22:59:15,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-12-15 22:59:15,824 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:15,825 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:15,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 22:59:15,826 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:15,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:15,827 INFO L85 PathProgramCache]: Analyzing trace with hash 408306017, now seen corresponding path program 1 times [2021-12-15 22:59:15,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:15,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263669771] [2021-12-15 22:59:15,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:15,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:15,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:15,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263669771] [2021-12-15 22:59:15,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263669771] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:15,964 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:15,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:59:15,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157403735] [2021-12-15 22:59:15,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:15,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:15,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:15,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:15,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:15,966 INFO L87 Difference]: Start difference. First operand 1842 states and 2504 transitions. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 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) [2021-12-15 22:59:17,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:17,967 INFO L93 Difference]: Finished difference Result 5445 states and 7408 transitions. [2021-12-15 22:59:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:17,968 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 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) Word has length 123 [2021-12-15 22:59:17,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:17,977 INFO L225 Difference]: With dead ends: 5445 [2021-12-15 22:59:17,978 INFO L226 Difference]: Without dead ends: 3605 [2021-12-15 22:59:17,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:17,986 INFO L933 BasicCegarLoop]: 224 mSDtfsCounter, 440 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1566 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:17,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [440 Valid, 273 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1566 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2021-12-15 22:59:17,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3605 states. [2021-12-15 22:59:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3605 to 3583. [2021-12-15 22:59:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3583 states, 3582 states have (on average 1.3358458961474038) internal successors, (4785), 3582 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:18,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3583 states to 3583 states and 4785 transitions. [2021-12-15 22:59:18,042 INFO L78 Accepts]: Start accepts. Automaton has 3583 states and 4785 transitions. Word has length 123 [2021-12-15 22:59:18,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:18,044 INFO L470 AbstractCegarLoop]: Abstraction has 3583 states and 4785 transitions. [2021-12-15 22:59:18,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 2 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) [2021-12-15 22:59:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3583 states and 4785 transitions. [2021-12-15 22:59:18,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-12-15 22:59:18,049 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:18,050 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:18,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 22:59:18,050 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:18,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:18,051 INFO L85 PathProgramCache]: Analyzing trace with hash 446171936, now seen corresponding path program 1 times [2021-12-15 22:59:18,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:18,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111375158] [2021-12-15 22:59:18,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:18,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:18,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:18,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:18,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111375158] [2021-12-15 22:59:18,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111375158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:18,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:18,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:59:18,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535736194] [2021-12-15 22:59:18,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:18,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:18,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:18,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:18,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:18,146 INFO L87 Difference]: Start difference. First operand 3583 states and 4785 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:20,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:20,299 INFO L93 Difference]: Finished difference Result 8893 states and 11846 transitions. [2021-12-15 22:59:20,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:20,299 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-12-15 22:59:20,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:20,312 INFO L225 Difference]: With dead ends: 8893 [2021-12-15 22:59:20,313 INFO L226 Difference]: Without dead ends: 5312 [2021-12-15 22:59:20,316 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:20,317 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 352 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1665 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 352 SdHoareTripleChecker+Valid, 537 SdHoareTripleChecker+Invalid, 1800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 1665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:20,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [352 Valid, 537 Invalid, 1800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 1665 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-12-15 22:59:20,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5312 states. [2021-12-15 22:59:20,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5312 to 5292. [2021-12-15 22:59:20,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5292 states, 5291 states have (on average 1.2797202797202798) internal successors, (6771), 5291 states have internal predecessors, (6771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:20,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5292 states to 5292 states and 6771 transitions. [2021-12-15 22:59:20,380 INFO L78 Accepts]: Start accepts. Automaton has 5292 states and 6771 transitions. Word has length 136 [2021-12-15 22:59:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:20,380 INFO L470 AbstractCegarLoop]: Abstraction has 5292 states and 6771 transitions. [2021-12-15 22:59:20,380 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:20,381 INFO L276 IsEmpty]: Start isEmpty. Operand 5292 states and 6771 transitions. [2021-12-15 22:59:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-15 22:59:20,381 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:20,382 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:20,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 22:59:20,382 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:20,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1180835985, now seen corresponding path program 1 times [2021-12-15 22:59:20,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:20,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809549799] [2021-12-15 22:59:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:20,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:20,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:20,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809549799] [2021-12-15 22:59:20,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809549799] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:20,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:20,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:20,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669647050] [2021-12-15 22:59:20,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:20,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:59:20,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:20,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:59:20,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:59:20,477 INFO L87 Difference]: Start difference. First operand 5292 states and 6771 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:22,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:22,268 INFO L93 Difference]: Finished difference Result 9327 states and 12044 transitions. [2021-12-15 22:59:22,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:59:22,268 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 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 142 [2021-12-15 22:59:22,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:22,279 INFO L225 Difference]: With dead ends: 9327 [2021-12-15 22:59:22,280 INFO L226 Difference]: Without dead ends: 4037 [2021-12-15 22:59:22,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 22:59:22,283 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 746 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 1623 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 1845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 1623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:22,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [746 Valid, 935 Invalid, 1845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 1623 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-12-15 22:59:22,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4037 states. [2021-12-15 22:59:22,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4037 to 4008. [2021-12-15 22:59:22,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4008 states, 4007 states have (on average 1.3017219865235836) internal successors, (5216), 4007 states have internal predecessors, (5216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:22,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4008 states to 4008 states and 5216 transitions. [2021-12-15 22:59:22,326 INFO L78 Accepts]: Start accepts. Automaton has 4008 states and 5216 transitions. Word has length 142 [2021-12-15 22:59:22,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:22,327 INFO L470 AbstractCegarLoop]: Abstraction has 4008 states and 5216 transitions. [2021-12-15 22:59:22,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:22,330 INFO L276 IsEmpty]: Start isEmpty. Operand 4008 states and 5216 transitions. [2021-12-15 22:59:22,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-12-15 22:59:22,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:22,331 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:22,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-15 22:59:22,331 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:22,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:22,333 INFO L85 PathProgramCache]: Analyzing trace with hash -142832468, now seen corresponding path program 1 times [2021-12-15 22:59:22,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:22,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829536361] [2021-12-15 22:59:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:22,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:22,424 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-12-15 22:59:22,424 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:22,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829536361] [2021-12-15 22:59:22,424 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829536361] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:22,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:22,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 22:59:22,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623118203] [2021-12-15 22:59:22,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:22,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:22,425 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:22,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:22,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:22,426 INFO L87 Difference]: Start difference. First operand 4008 states and 5216 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:23,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:23,930 INFO L93 Difference]: Finished difference Result 10996 states and 14542 transitions. [2021-12-15 22:59:23,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:23,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 170 [2021-12-15 22:59:23,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:23,942 INFO L225 Difference]: With dead ends: 10996 [2021-12-15 22:59:23,942 INFO L226 Difference]: Without dead ends: 5711 [2021-12-15 22:59:23,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:23,947 INFO L933 BasicCegarLoop]: 516 mSDtfsCounter, 386 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 386 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:23,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [386 Valid, 591 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 22:59:23,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5711 states. [2021-12-15 22:59:23,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5711 to 4427. [2021-12-15 22:59:23,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4427 states, 4426 states have (on average 1.208992318120199) internal successors, (5351), 4426 states have internal predecessors, (5351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:23,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4427 states to 4427 states and 5351 transitions. [2021-12-15 22:59:23,998 INFO L78 Accepts]: Start accepts. Automaton has 4427 states and 5351 transitions. Word has length 170 [2021-12-15 22:59:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:23,998 INFO L470 AbstractCegarLoop]: Abstraction has 4427 states and 5351 transitions. [2021-12-15 22:59:23,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:23,998 INFO L276 IsEmpty]: Start isEmpty. Operand 4427 states and 5351 transitions. [2021-12-15 22:59:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-12-15 22:59:24,000 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:24,000 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:24,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-15 22:59:24,000 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:24,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:24,001 INFO L85 PathProgramCache]: Analyzing trace with hash -2084215794, now seen corresponding path program 1 times [2021-12-15 22:59:24,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:24,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783264826] [2021-12-15 22:59:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:24,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:24,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:24,071 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 125 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:24,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:24,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783264826] [2021-12-15 22:59:24,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783264826] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:24,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:24,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:24,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607958829] [2021-12-15 22:59:24,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:24,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:24,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:24,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:24,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:24,074 INFO L87 Difference]: Start difference. First operand 4427 states and 5351 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:25,469 INFO L93 Difference]: Finished difference Result 11399 states and 13997 transitions. [2021-12-15 22:59:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:25,469 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-12-15 22:59:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:25,485 INFO L225 Difference]: With dead ends: 11399 [2021-12-15 22:59:25,485 INFO L226 Difference]: Without dead ends: 6974 [2021-12-15 22:59:25,490 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 [2021-12-15 22:59:25,490 INFO L933 BasicCegarLoop]: 727 mSDtfsCounter, 496 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1136 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 1136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:25,490 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 785 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 1136 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 22:59:25,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6974 states. [2021-12-15 22:59:25,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6974 to 6974. [2021-12-15 22:59:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6974 states, 6973 states have (on average 1.1834217696830633) internal successors, (8252), 6973 states have internal predecessors, (8252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6974 states to 6974 states and 8252 transitions. [2021-12-15 22:59:25,569 INFO L78 Accepts]: Start accepts. Automaton has 6974 states and 8252 transitions. Word has length 183 [2021-12-15 22:59:25,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:25,569 INFO L470 AbstractCegarLoop]: Abstraction has 6974 states and 8252 transitions. [2021-12-15 22:59:25,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:25,569 INFO L276 IsEmpty]: Start isEmpty. Operand 6974 states and 8252 transitions. [2021-12-15 22:59:25,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-12-15 22:59:25,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:25,571 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:25,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-15 22:59:25,571 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:25,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:25,572 INFO L85 PathProgramCache]: Analyzing trace with hash 851513907, now seen corresponding path program 1 times [2021-12-15 22:59:25,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:25,572 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118342823] [2021-12-15 22:59:25,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:25,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:25,620 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-15 22:59:25,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:25,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118342823] [2021-12-15 22:59:25,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118342823] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:25,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:25,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:25,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721024488] [2021-12-15 22:59:25,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:25,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:25,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:25,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:25,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:25,623 INFO L87 Difference]: Start difference. First operand 6974 states and 8252 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:27,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:27,112 INFO L93 Difference]: Finished difference Result 16914 states and 20159 transitions. [2021-12-15 22:59:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:27,113 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 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 185 [2021-12-15 22:59:27,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:27,126 INFO L225 Difference]: With dead ends: 16914 [2021-12-15 22:59:27,126 INFO L226 Difference]: Without dead ends: 9941 [2021-12-15 22:59:27,130 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 [2021-12-15 22:59:27,131 INFO L933 BasicCegarLoop]: 382 mSDtfsCounter, 420 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1215 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 420 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 1489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:27,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [420 Valid, 444 Invalid, 1489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1215 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-12-15 22:59:27,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9941 states. [2021-12-15 22:59:27,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9941 to 7373. [2021-12-15 22:59:27,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7373 states, 7372 states have (on average 1.1795984807379274) internal successors, (8696), 7372 states have internal predecessors, (8696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:27,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7373 states to 7373 states and 8696 transitions. [2021-12-15 22:59:27,228 INFO L78 Accepts]: Start accepts. Automaton has 7373 states and 8696 transitions. Word has length 185 [2021-12-15 22:59:27,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:27,228 INFO L470 AbstractCegarLoop]: Abstraction has 7373 states and 8696 transitions. [2021-12-15 22:59:27,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 3 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:27,228 INFO L276 IsEmpty]: Start isEmpty. Operand 7373 states and 8696 transitions. [2021-12-15 22:59:27,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-12-15 22:59:27,231 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:27,231 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:27,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-15 22:59:27,232 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:27,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:27,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1437277011, now seen corresponding path program 1 times [2021-12-15 22:59:27,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:27,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632570840] [2021-12-15 22:59:27,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:27,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:27,328 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 22:59:27,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:27,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632570840] [2021-12-15 22:59:27,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632570840] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:27,329 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:27,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:27,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052783924] [2021-12-15 22:59:27,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:27,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:27,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:27,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:27,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:27,331 INFO L87 Difference]: Start difference. First operand 7373 states and 8696 transitions. Second operand has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:29,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:29,056 INFO L93 Difference]: Finished difference Result 18168 states and 21744 transitions. [2021-12-15 22:59:29,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:29,057 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 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 251 [2021-12-15 22:59:29,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:29,071 INFO L225 Difference]: With dead ends: 18168 [2021-12-15 22:59:29,072 INFO L226 Difference]: Without dead ends: 10797 [2021-12-15 22:59:29,078 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 [2021-12-15 22:59:29,079 INFO L933 BasicCegarLoop]: 367 mSDtfsCounter, 474 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 1294 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:29,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 413 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1294 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 22:59:29,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10797 states. [2021-12-15 22:59:29,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10797 to 10362. [2021-12-15 22:59:29,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10362 states, 10361 states have (on average 1.1945758131454494) internal successors, (12377), 10361 states have internal predecessors, (12377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:29,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10362 states to 10362 states and 12377 transitions. [2021-12-15 22:59:29,180 INFO L78 Accepts]: Start accepts. Automaton has 10362 states and 12377 transitions. Word has length 251 [2021-12-15 22:59:29,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:29,181 INFO L470 AbstractCegarLoop]: Abstraction has 10362 states and 12377 transitions. [2021-12-15 22:59:29,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.666666666666664) internal successors, (170), 3 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:29,181 INFO L276 IsEmpty]: Start isEmpty. Operand 10362 states and 12377 transitions. [2021-12-15 22:59:29,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-12-15 22:59:29,184 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:29,184 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:29,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-15 22:59:29,184 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:29,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:29,185 INFO L85 PathProgramCache]: Analyzing trace with hash -212138063, now seen corresponding path program 1 times [2021-12-15 22:59:29,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:29,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974805043] [2021-12-15 22:59:29,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:29,185 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:29,265 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 219 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-15 22:59:29,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:29,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974805043] [2021-12-15 22:59:29,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974805043] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:29,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:29,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:29,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600719423] [2021-12-15 22:59:29,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:29,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:29,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:29,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:29,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:29,268 INFO L87 Difference]: Start difference. First operand 10362 states and 12377 transitions. Second operand has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:30,967 INFO L93 Difference]: Finished difference Result 25856 states and 31145 transitions. [2021-12-15 22:59:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:30,967 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-12-15 22:59:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:30,990 INFO L225 Difference]: With dead ends: 25856 [2021-12-15 22:59:30,991 INFO L226 Difference]: Without dead ends: 15059 [2021-12-15 22:59:31,000 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 [2021-12-15 22:59:31,001 INFO L933 BasicCegarLoop]: 588 mSDtfsCounter, 493 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1240 mSolverCounterSat, 349 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 493 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 349 IncrementalHoareTripleChecker+Valid, 1240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:31,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [493 Valid, 630 Invalid, 1589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [349 Valid, 1240 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-12-15 22:59:31,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15059 states. [2021-12-15 22:59:31,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15059 to 14203. [2021-12-15 22:59:31,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14203 states, 14202 states have (on average 1.1811716659625404) internal successors, (16775), 14202 states have internal predecessors, (16775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:31,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14203 states to 14203 states and 16775 transitions. [2021-12-15 22:59:31,156 INFO L78 Accepts]: Start accepts. Automaton has 14203 states and 16775 transitions. Word has length 263 [2021-12-15 22:59:31,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:31,156 INFO L470 AbstractCegarLoop]: Abstraction has 14203 states and 16775 transitions. [2021-12-15 22:59:31,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.0) internal successors, (183), 3 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:31,157 INFO L276 IsEmpty]: Start isEmpty. Operand 14203 states and 16775 transitions. [2021-12-15 22:59:31,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-12-15 22:59:31,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:31,160 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:31,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-15 22:59:31,160 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:31,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:31,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1010683278, now seen corresponding path program 1 times [2021-12-15 22:59:31,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:31,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909764905] [2021-12-15 22:59:31,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:31,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:31,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-12-15 22:59:31,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:31,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909764905] [2021-12-15 22:59:31,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909764905] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:31,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:31,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:31,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471750540] [2021-12-15 22:59:31,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:31,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:31,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:31,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:31,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:31,230 INFO L87 Difference]: Start difference. First operand 14203 states and 16775 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:32,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:32,716 INFO L93 Difference]: Finished difference Result 33929 states and 40433 transitions. [2021-12-15 22:59:32,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:32,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 268 [2021-12-15 22:59:32,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:32,738 INFO L225 Difference]: With dead ends: 33929 [2021-12-15 22:59:32,738 INFO L226 Difference]: Without dead ends: 19728 [2021-12-15 22:59:32,749 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 [2021-12-15 22:59:32,749 INFO L933 BasicCegarLoop]: 760 mSDtfsCounter, 379 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 1178 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 1417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:32,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [379 Valid, 826 Invalid, 1417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1178 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 22:59:32,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19728 states. [2021-12-15 22:59:32,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19728 to 18878. [2021-12-15 22:59:32,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18878 states, 18877 states have (on average 1.1560629337288764) internal successors, (21823), 18877 states have internal predecessors, (21823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18878 states to 18878 states and 21823 transitions. [2021-12-15 22:59:32,922 INFO L78 Accepts]: Start accepts. Automaton has 18878 states and 21823 transitions. Word has length 268 [2021-12-15 22:59:32,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:32,922 INFO L470 AbstractCegarLoop]: Abstraction has 18878 states and 21823 transitions. [2021-12-15 22:59:32,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:32,923 INFO L276 IsEmpty]: Start isEmpty. Operand 18878 states and 21823 transitions. [2021-12-15 22:59:32,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2021-12-15 22:59:32,926 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:32,927 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:32,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-15 22:59:32,927 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:32,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:32,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1351221799, now seen corresponding path program 1 times [2021-12-15 22:59:32,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:32,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529575062] [2021-12-15 22:59:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:32,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:33,021 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 229 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-12-15 22:59:33,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:33,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529575062] [2021-12-15 22:59:33,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529575062] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:33,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:33,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 22:59:33,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072931721] [2021-12-15 22:59:33,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:33,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 22:59:33,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:33,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 22:59:33,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:59:33,024 INFO L87 Difference]: Start difference. First operand 18878 states and 21823 transitions. Second operand has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:35,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:35,908 INFO L93 Difference]: Finished difference Result 60809 states and 70117 transitions. [2021-12-15 22:59:35,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 22:59:35,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 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 291 [2021-12-15 22:59:35,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:35,954 INFO L225 Difference]: With dead ends: 60809 [2021-12-15 22:59:35,955 INFO L226 Difference]: Without dead ends: 40220 [2021-12-15 22:59:35,971 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 22:59:35,972 INFO L933 BasicCegarLoop]: 195 mSDtfsCounter, 880 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 2762 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 880 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 3201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:35,972 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [880 Valid, 318 Invalid, 3201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [439 Valid, 2762 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-15 22:59:36,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40220 states. [2021-12-15 22:59:36,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40220 to 39749. [2021-12-15 22:59:36,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39749 states, 39748 states have (on average 1.1313776793800947) internal successors, (44970), 39748 states have internal predecessors, (44970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:36,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39749 states to 39749 states and 44970 transitions. [2021-12-15 22:59:36,618 INFO L78 Accepts]: Start accepts. Automaton has 39749 states and 44970 transitions. Word has length 291 [2021-12-15 22:59:36,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:36,618 INFO L470 AbstractCegarLoop]: Abstraction has 39749 states and 44970 transitions. [2021-12-15 22:59:36,618 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 52.5) internal successors, (210), 4 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:36,618 INFO L276 IsEmpty]: Start isEmpty. Operand 39749 states and 44970 transitions. [2021-12-15 22:59:36,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 373 [2021-12-15 22:59:36,624 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:36,624 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:36,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-15 22:59:36,625 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:36,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:36,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1410506514, now seen corresponding path program 1 times [2021-12-15 22:59:36,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:36,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971327897] [2021-12-15 22:59:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:36,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:36,742 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 200 proven. 82 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-12-15 22:59:36,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:36,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971327897] [2021-12-15 22:59:36,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971327897] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:59:36,742 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987612242] [2021-12-15 22:59:36,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:36,743 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:59:36,743 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:59:36,744 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:59:36,745 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-15 22:59:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:36,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 22:59:36,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:59:37,807 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 158 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:37,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 22:59:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 311 backedges. 311 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 22:59:38,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987612242] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-15 22:59:38,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-15 22:59:38,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 4] total 7 [2021-12-15 22:59:38,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344745481] [2021-12-15 22:59:38,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:38,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-15 22:59:38,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:38,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-15 22:59:38,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:59:38,370 INFO L87 Difference]: Start difference. First operand 39749 states and 44970 transitions. Second operand has 5 states, 5 states have (on average 74.4) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:41,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:41,607 INFO L93 Difference]: Finished difference Result 105901 states and 119385 transitions. [2021-12-15 22:59:41,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-15 22:59:41,608 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 372 [2021-12-15 22:59:41,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:41,685 INFO L225 Difference]: With dead ends: 105901 [2021-12-15 22:59:41,686 INFO L226 Difference]: Without dead ends: 65302 [2021-12-15 22:59:41,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 745 GetRequests, 737 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2021-12-15 22:59:41,716 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1286 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 3116 mSolverCounterSat, 635 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1286 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 3751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 635 IncrementalHoareTripleChecker+Valid, 3116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:41,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1286 Valid, 194 Invalid, 3751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [635 Valid, 3116 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2021-12-15 22:59:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65302 states. [2021-12-15 22:59:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65302 to 63583. [2021-12-15 22:59:42,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63583 states, 63582 states have (on average 1.101679720675663) internal successors, (70047), 63582 states have internal predecessors, (70047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:42,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63583 states to 63583 states and 70047 transitions. [2021-12-15 22:59:42,516 INFO L78 Accepts]: Start accepts. Automaton has 63583 states and 70047 transitions. Word has length 372 [2021-12-15 22:59:42,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:42,516 INFO L470 AbstractCegarLoop]: Abstraction has 63583 states and 70047 transitions. [2021-12-15 22:59:42,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 74.4) internal successors, (372), 4 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 63583 states and 70047 transitions. [2021-12-15 22:59:42,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-12-15 22:59:42,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:42,522 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:42,539 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-15 22:59:42,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-12-15 22:59:42,735 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:42,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:42,736 INFO L85 PathProgramCache]: Analyzing trace with hash -817627984, now seen corresponding path program 1 times [2021-12-15 22:59:42,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:42,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890883173] [2021-12-15 22:59:42,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:42,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 605 backedges. 495 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-12-15 22:59:42,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:42,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890883173] [2021-12-15 22:59:42,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890883173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 22:59:42,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 22:59:42,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 22:59:42,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059214531] [2021-12-15 22:59:42,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 22:59:42,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 22:59:42,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:42,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 22:59:42,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 22:59:42,840 INFO L87 Difference]: Start difference. First operand 63583 states and 70047 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:44,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:44,500 INFO L93 Difference]: Finished difference Result 147604 states and 162997 transitions. [2021-12-15 22:59:44,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 22:59:44,500 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 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 377 [2021-12-15 22:59:44,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:44,593 INFO L225 Difference]: With dead ends: 147604 [2021-12-15 22:59:44,593 INFO L226 Difference]: Without dead ends: 83595 [2021-12-15 22:59:44,631 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 [2021-12-15 22:59:44,632 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 397 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1187 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 1381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 1187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:44,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [397 Valid, 334 Invalid, 1381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 1187 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-15 22:59:44,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83595 states. [2021-12-15 22:59:45,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83595 to 78041. [2021-12-15 22:59:45,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78041 states, 78040 states have (on average 1.0901973347001537) internal successors, (85079), 78040 states have internal predecessors, (85079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78041 states to 78041 states and 85079 transitions. [2021-12-15 22:59:45,740 INFO L78 Accepts]: Start accepts. Automaton has 78041 states and 85079 transitions. Word has length 377 [2021-12-15 22:59:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 22:59:45,740 INFO L470 AbstractCegarLoop]: Abstraction has 78041 states and 85079 transitions. [2021-12-15 22:59:45,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:45,741 INFO L276 IsEmpty]: Start isEmpty. Operand 78041 states and 85079 transitions. [2021-12-15 22:59:45,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2021-12-15 22:59:45,748 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 22:59:45,748 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 22:59:45,748 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-15 22:59:45,749 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 22:59:45,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 22:59:45,749 INFO L85 PathProgramCache]: Analyzing trace with hash 2097456585, now seen corresponding path program 1 times [2021-12-15 22:59:45,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 22:59:45,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773167875] [2021-12-15 22:59:45,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:45,749 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 22:59:45,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 301 proven. 29 refuted. 0 times theorem prover too weak. 269 trivial. 0 not checked. [2021-12-15 22:59:45,899 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 22:59:45,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773167875] [2021-12-15 22:59:45,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773167875] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-15 22:59:45,900 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133260219] [2021-12-15 22:59:45,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 22:59:45,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-15 22:59:45,900 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 22:59:45,901 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-15 22:59:45,902 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-15 22:59:46,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 22:59:46,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 572 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-15 22:59:46,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 22:59:46,756 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 387 proven. 82 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-15 22:59:46,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 22:59:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 387 proven. 82 refuted. 0 times theorem prover too weak. 130 trivial. 0 not checked. [2021-12-15 22:59:48,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133260219] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 22:59:48,122 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-15 22:59:48,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-12-15 22:59:48,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350678111] [2021-12-15 22:59:48,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-15 22:59:48,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-15 22:59:48,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 22:59:48,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-15 22:59:48,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-12-15 22:59:48,124 INFO L87 Difference]: Start difference. First operand 78041 states and 85079 transitions. Second operand has 9 states, 9 states have (on average 80.66666666666667) internal successors, (726), 9 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 22:59:59,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 22:59:59,275 INFO L93 Difference]: Finished difference Result 206358 states and 224208 transitions. [2021-12-15 22:59:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-15 22:59:59,276 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 80.66666666666667) internal successors, (726), 9 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 411 [2021-12-15 22:59:59,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 22:59:59,437 INFO L225 Difference]: With dead ends: 206358 [2021-12-15 22:59:59,437 INFO L226 Difference]: Without dead ends: 126617 [2021-12-15 22:59:59,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 855 GetRequests, 833 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=402, Unknown=0, NotChecked=0, Total=552 [2021-12-15 22:59:59,472 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 10735 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 12779 mSolverCounterSat, 1713 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10735 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 14492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1713 IncrementalHoareTripleChecker+Valid, 12779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.1s IncrementalHoareTripleChecker+Time [2021-12-15 22:59:59,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10735 Valid, 394 Invalid, 14492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1713 Valid, 12779 Invalid, 0 Unknown, 0 Unchecked, 10.1s Time] [2021-12-15 22:59:59,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126617 states. [2021-12-15 23:00:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126617 to 100153. [2021-12-15 23:00:00,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100153 states, 100152 states have (on average 1.0728692387570893) internal successors, (107450), 100152 states have internal predecessors, (107450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:00,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100153 states to 100153 states and 107450 transitions. [2021-12-15 23:00:00,867 INFO L78 Accepts]: Start accepts. Automaton has 100153 states and 107450 transitions. Word has length 411 [2021-12-15 23:00:00,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:00,867 INFO L470 AbstractCegarLoop]: Abstraction has 100153 states and 107450 transitions. [2021-12-15 23:00:00,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 80.66666666666667) internal successors, (726), 9 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:00,867 INFO L276 IsEmpty]: Start isEmpty. Operand 100153 states and 107450 transitions. [2021-12-15 23:00:00,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2021-12-15 23:00:00,875 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:00,876 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:00,893 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-15 23:00:01,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-15 23:00:01,093 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:01,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:01,094 INFO L85 PathProgramCache]: Analyzing trace with hash 300395610, now seen corresponding path program 1 times [2021-12-15 23:00:01,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:01,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557054147] [2021-12-15 23:00:01,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:01,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:01,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:01,391 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 86 proven. 0 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2021-12-15 23:00:01,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:01,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557054147] [2021-12-15 23:00:01,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557054147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:01,392 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:01,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:00:01,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946257818] [2021-12-15 23:00:01,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:01,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:00:01,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:01,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:00:01,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:00:01,393 INFO L87 Difference]: Start difference. First operand 100153 states and 107450 transitions. Second operand has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:03,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:00:03,061 INFO L93 Difference]: Finished difference Result 198174 states and 212622 transitions. [2021-12-15 23:00:03,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:00:03,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 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 497 [2021-12-15 23:00:03,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:00:03,185 INFO L225 Difference]: With dead ends: 198174 [2021-12-15 23:00:03,186 INFO L226 Difference]: Without dead ends: 98873 [2021-12-15 23:00:03,230 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 [2021-12-15 23:00:03,231 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 451 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1131 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 685 SdHoareTripleChecker+Invalid, 1246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-15 23:00:03,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [451 Valid, 685 Invalid, 1246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1131 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-15 23:00:03,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98873 states. [2021-12-15 23:00:04,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98873 to 98445. [2021-12-15 23:00:04,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98445 states, 98444 states have (on average 1.0620251107228476) internal successors, (104550), 98444 states have internal predecessors, (104550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:04,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98445 states to 98445 states and 104550 transitions. [2021-12-15 23:00:04,469 INFO L78 Accepts]: Start accepts. Automaton has 98445 states and 104550 transitions. Word has length 497 [2021-12-15 23:00:04,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:00:04,471 INFO L470 AbstractCegarLoop]: Abstraction has 98445 states and 104550 transitions. [2021-12-15 23:00:04,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.33333333333333) internal successors, (238), 3 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:00:04,471 INFO L276 IsEmpty]: Start isEmpty. Operand 98445 states and 104550 transitions. [2021-12-15 23:00:04,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 599 [2021-12-15 23:00:04,491 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:00:04,491 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:00:04,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-15 23:00:04,492 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:00:04,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:00:04,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1778925136, now seen corresponding path program 1 times [2021-12-15 23:00:04,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:00:04,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344620684] [2021-12-15 23:00:04,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:00:04,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:00:04,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:00:04,702 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 498 proven. 0 refuted. 0 times theorem prover too weak. 510 trivial. 0 not checked. [2021-12-15 23:00:04,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:00:04,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344620684] [2021-12-15 23:00:04,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344620684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:00:04,702 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:00:04,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:00:04,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971078622] [2021-12-15 23:00:04,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:00:04,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:00:04,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:00:04,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:00:04,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:00:04,704 INFO L87 Difference]: Start difference. First operand 98445 states and 104550 transitions. Second operand has 4 states, 4 states have (on average 80.0) internal successors, (320), 4 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)