./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem19_label43.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 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/Problem19_label43.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 62761b3785e62b00e38a2b72a515b0478c38d00e83f95ad63b6d7081302ecf99 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:46:43,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:46:43,118 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:46:43,180 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:46:43,181 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:46:43,184 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:46:43,185 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:46:43,187 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:46:43,188 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:46:43,193 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:46:43,193 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:46:43,194 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:46:43,194 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:46:43,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:46:43,198 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:46:43,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:46:43,201 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:46:43,202 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:46:43,203 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:46:43,209 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:46:43,210 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:46:43,210 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:46:43,211 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:46:43,212 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:46:43,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:46:43,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:46:43,214 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:46:43,215 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:46:43,215 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:46:43,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:46:43,216 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:46:43,217 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:46:43,218 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:46:43,219 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:46:43,220 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:46:43,220 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:46:43,220 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:46:43,220 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:46:43,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:46:43,221 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:46:43,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:46:43,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:46:43,248 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:46:43,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:46:43,250 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:46:43,250 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:46:43,251 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:46:43,251 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:46:43,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:46:43,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:46:43,252 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:46:43,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:46:43,253 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:46:43,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:46:43,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:46:43,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:46:43,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:46:43,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:46:43,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:46:43,254 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:46:43,254 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:46:43,254 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:46:43,254 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:46:43,254 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:46:43,255 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:46:43,255 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:46:43,255 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:46:43,255 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:46:43,255 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:46:43,255 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:46:43,256 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:46:43,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:46:43,256 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:46:43,256 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:46:43,256 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:46:43,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:46:43,257 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 62761b3785e62b00e38a2b72a515b0478c38d00e83f95ad63b6d7081302ecf99 [2021-12-22 09:46:43,441 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:46:43,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:46:43,469 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:46:43,469 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:46:43,470 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:46:43,470 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem19_label43.c [2021-12-22 09:46:43,528 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13286164/7386beece25848be81871a42b205f8a5/FLAGb282cff0b [2021-12-22 09:46:44,192 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:46:44,192 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem19_label43.c [2021-12-22 09:46:44,230 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13286164/7386beece25848be81871a42b205f8a5/FLAGb282cff0b [2021-12-22 09:46:44,545 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e13286164/7386beece25848be81871a42b205f8a5 [2021-12-22 09:46:44,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:46:44,550 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:46:44,552 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:46:44,552 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:46:44,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:46:44,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:46:44" (1/1) ... [2021-12-22 09:46:44,556 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3136484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:44, skipping insertion in model container [2021-12-22 09:46:44,556 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:46:44" (1/1) ... [2021-12-22 09:46:44,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:46:44,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:46:44,946 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/Problem19_label43.c[3247,3260] [2021-12-22 09:46:45,854 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:46:45,859 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:46:45,869 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/Problem19_label43.c[3247,3260] [2021-12-22 09:46:46,363 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:46:46,388 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:46:46,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:46 WrapperNode [2021-12-22 09:46:46,388 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:46:46,389 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:46:46,389 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:46:46,389 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:46:46,394 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:46" (1/1) ... [2021-12-22 09:46:46,463 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:46" (1/1) ... [2021-12-22 09:46:47,249 INFO L137 Inliner]: procedures = 19, calls = 13, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 9425 [2021-12-22 09:46:47,249 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:46:47,249 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:46:47,250 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:46:47,250 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:46:47,255 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:46" (1/1) ... [2021-12-22 09:46:47,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:46" (1/1) ... [2021-12-22 09:46:47,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:46" (1/1) ... [2021-12-22 09:46:47,367 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:46" (1/1) ... [2021-12-22 09:46:47,585 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:46" (1/1) ... [2021-12-22 09:46:47,612 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:46" (1/1) ... [2021-12-22 09:46:47,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:46" (1/1) ... [2021-12-22 09:46:47,910 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:46:47,911 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:46:47,912 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:46:47,912 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:46:47,913 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:46" (1/1) ... [2021-12-22 09:46:47,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:46:47,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:46:47,936 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) [2021-12-22 09:46:47,942 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 [2021-12-22 09:46:47,961 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:46:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:46:47,962 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:46:47,962 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:46:48,008 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:46:48,010 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:46:53,163 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:46:53,177 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:46:53,177 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:46:53,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:46:53 BoogieIcfgContainer [2021-12-22 09:46:53,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:46:53,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:46:53,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:46:53,183 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:46:53,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:46:44" (1/3) ... [2021-12-22 09:46:53,184 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435e4ef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:46:53, skipping insertion in model container [2021-12-22 09:46:53,184 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:46:46" (2/3) ... [2021-12-22 09:46:53,185 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435e4ef0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:46:53, skipping insertion in model container [2021-12-22 09:46:53,185 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:46:53" (3/3) ... [2021-12-22 09:46:53,186 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem19_label43.c [2021-12-22 09:46:53,189 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:46:53,189 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:46:53,223 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:46:53,227 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 [2021-12-22 09:46:53,227 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:46:53,254 INFO L276 IsEmpty]: Start isEmpty. Operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:46:53,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-12-22 09:46:53,266 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:46:53,266 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] [2021-12-22 09:46:53,267 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:46:53,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:46:53,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1644072970, now seen corresponding path program 1 times [2021-12-22 09:46:53,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:46:53,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975490528] [2021-12-22 09:46:53,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:46:53,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:46:53,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:46:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:46:53,463 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:46:53,463 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975490528] [2021-12-22 09:46:53,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975490528] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:46:53,465 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:46:53,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:46:53,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288154100] [2021-12-22 09:46:53,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:46:53,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:46:53,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:46:53,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:46:53,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:46:53,491 INFO L87 Difference]: Start difference. First operand has 1748 states, 1746 states have (on average 1.8699885452462772) internal successors, (3265), 1747 states have internal predecessors, (3265), 0 states have call successors, (0), 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 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:46:59,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:46:59,176 INFO L93 Difference]: Finished difference Result 4919 states and 9313 transitions. [2021-12-22 09:46:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:46:59,178 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 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 22 [2021-12-22 09:46:59,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:46:59,207 INFO L225 Difference]: With dead ends: 4919 [2021-12-22 09:46:59,208 INFO L226 Difference]: Without dead ends: 3107 [2021-12-22 09:46:59,216 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 [2021-12-22 09:46:59,219 INFO L933 BasicCegarLoop]: 1276 mSDtfsCounter, 1531 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 4638 mSolverCounterSat, 1110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1531 SdHoareTripleChecker+Valid, 1457 SdHoareTripleChecker+Invalid, 5748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1110 IncrementalHoareTripleChecker+Valid, 4638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:46:59,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1531 Valid, 1457 Invalid, 5748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1110 Valid, 4638 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-22 09:46:59,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3107 states. [2021-12-22 09:46:59,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3107 to 3106. [2021-12-22 09:46:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 1.652818035426731) internal successors, (5132), 3105 states have internal predecessors, (5132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:46:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 5132 transitions. [2021-12-22 09:46:59,342 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 5132 transitions. Word has length 22 [2021-12-22 09:46:59,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:46:59,343 INFO L470 AbstractCegarLoop]: Abstraction has 3106 states and 5132 transitions. [2021-12-22 09:46:59,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 2 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:46:59,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 5132 transitions. [2021-12-22 09:46:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-22 09:46:59,347 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:46:59,347 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 09:46:59,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:46:59,348 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:46:59,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:46:59,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1906323970, now seen corresponding path program 1 times [2021-12-22 09:46:59,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:46:59,351 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650510188] [2021-12-22 09:46:59,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:46:59,351 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:46:59,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:46:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:46:59,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:46:59,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650510188] [2021-12-22 09:46:59,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650510188] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:46:59,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:46:59,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:46:59,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452334313] [2021-12-22 09:46:59,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:46:59,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:46:59,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:46:59,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:46:59,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:46:59,517 INFO L87 Difference]: Start difference. First operand 3106 states and 5132 transitions. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:09,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:47:09,409 INFO L93 Difference]: Finished difference Result 10391 states and 16943 transitions. [2021-12-22 09:47:09,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:47:09,410 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 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 91 [2021-12-22 09:47:09,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:47:09,430 INFO L225 Difference]: With dead ends: 10391 [2021-12-22 09:47:09,430 INFO L226 Difference]: Without dead ends: 7287 [2021-12-22 09:47:09,438 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 [2021-12-22 09:47:09,439 INFO L933 BasicCegarLoop]: 1842 mSDtfsCounter, 4207 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 11122 mSolverCounterSat, 1406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4207 SdHoareTripleChecker+Valid, 2104 SdHoareTripleChecker+Invalid, 12528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1406 IncrementalHoareTripleChecker+Valid, 11122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:47:09,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4207 Valid, 2104 Invalid, 12528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1406 Valid, 11122 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2021-12-22 09:47:09,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7287 states. [2021-12-22 09:47:09,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7287 to 7236. [2021-12-22 09:47:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7236 states, 7235 states have (on average 1.5214927436074637) internal successors, (11008), 7235 states have internal predecessors, (11008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7236 states to 7236 states and 11008 transitions. [2021-12-22 09:47:09,561 INFO L78 Accepts]: Start accepts. Automaton has 7236 states and 11008 transitions. Word has length 91 [2021-12-22 09:47:09,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:47:09,562 INFO L470 AbstractCegarLoop]: Abstraction has 7236 states and 11008 transitions. [2021-12-22 09:47:09,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:09,563 INFO L276 IsEmpty]: Start isEmpty. Operand 7236 states and 11008 transitions. [2021-12-22 09:47:09,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2021-12-22 09:47:09,576 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:47:09,577 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:47:09,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:47:09,579 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:47:09,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:47:09,580 INFO L85 PathProgramCache]: Analyzing trace with hash 275460643, now seen corresponding path program 1 times [2021-12-22 09:47:09,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:47:09,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027360305] [2021-12-22 09:47:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:47:09,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:47:09,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:47:09,762 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:47:09,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:47:09,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027360305] [2021-12-22 09:47:09,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027360305] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:47:09,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:47:09,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:47:09,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122843310] [2021-12-22 09:47:09,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:47:09,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:47:09,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:47:09,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:47:09,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:47:09,764 INFO L87 Difference]: Start difference. First operand 7236 states and 11008 transitions. Second operand has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:14,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:47:14,740 INFO L93 Difference]: Finished difference Result 15858 states and 25896 transitions. [2021-12-22 09:47:14,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:47:14,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 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 257 [2021-12-22 09:47:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:47:14,778 INFO L225 Difference]: With dead ends: 15858 [2021-12-22 09:47:14,778 INFO L226 Difference]: Without dead ends: 9989 [2021-12-22 09:47:14,788 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 [2021-12-22 09:47:14,794 INFO L933 BasicCegarLoop]: 2905 mSDtfsCounter, 1589 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 3684 mSolverCounterSat, 1906 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1589 SdHoareTripleChecker+Valid, 3095 SdHoareTripleChecker+Invalid, 5590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1906 IncrementalHoareTripleChecker+Valid, 3684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-22 09:47:14,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1589 Valid, 3095 Invalid, 5590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1906 Valid, 3684 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-22 09:47:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9989 states. [2021-12-22 09:47:14,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9989 to 9987. [2021-12-22 09:47:14,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9987 states, 9986 states have (on average 1.4261966753454838) internal successors, (14242), 9986 states have internal predecessors, (14242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:14,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 14242 transitions. [2021-12-22 09:47:14,943 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 14242 transitions. Word has length 257 [2021-12-22 09:47:14,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:47:14,944 INFO L470 AbstractCegarLoop]: Abstraction has 9987 states and 14242 transitions. [2021-12-22 09:47:14,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.66666666666667) internal successors, (257), 3 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:14,945 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 14242 transitions. [2021-12-22 09:47:14,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-22 09:47:14,947 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:47:14,948 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:47:14,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:47:14,948 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:47:14,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:47:14,949 INFO L85 PathProgramCache]: Analyzing trace with hash 2127912823, now seen corresponding path program 1 times [2021-12-22 09:47:14,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:47:14,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797226742] [2021-12-22 09:47:14,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:47:14,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:47:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:47:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:47:15,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:47:15,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797226742] [2021-12-22 09:47:15,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797226742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:47:15,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:47:15,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:47:15,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173847713] [2021-12-22 09:47:15,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:47:15,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:47:15,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:47:15,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:47:15,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:47:15,146 INFO L87 Difference]: Start difference. First operand 9987 states and 14242 transitions. Second operand has 4 states, 4 states have (on average 81.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:20,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:47:20,917 INFO L93 Difference]: Finished difference Result 18638 states and 27136 transitions. [2021-12-22 09:47:20,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:47:20,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 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 324 [2021-12-22 09:47:20,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:47:20,953 INFO L225 Difference]: With dead ends: 18638 [2021-12-22 09:47:20,953 INFO L226 Difference]: Without dead ends: 9987 [2021-12-22 09:47:20,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:47:20,964 INFO L933 BasicCegarLoop]: 1764 mSDtfsCounter, 1140 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7313 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1140 SdHoareTripleChecker+Valid, 2106 SdHoareTripleChecker+Invalid, 7321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2021-12-22 09:47:20,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1140 Valid, 2106 Invalid, 7321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7313 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2021-12-22 09:47:20,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2021-12-22 09:47:21,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 9987. [2021-12-22 09:47:21,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9987 states, 9986 states have (on average 1.4252954135790106) internal successors, (14233), 9986 states have internal predecessors, (14233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:21,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9987 states to 9987 states and 14233 transitions. [2021-12-22 09:47:21,098 INFO L78 Accepts]: Start accepts. Automaton has 9987 states and 14233 transitions. Word has length 324 [2021-12-22 09:47:21,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:47:21,099 INFO L470 AbstractCegarLoop]: Abstraction has 9987 states and 14233 transitions. [2021-12-22 09:47:21,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.0) internal successors, (324), 3 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:21,100 INFO L276 IsEmpty]: Start isEmpty. Operand 9987 states and 14233 transitions. [2021-12-22 09:47:21,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 579 [2021-12-22 09:47:21,108 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:47:21,109 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:47:21,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:47:21,109 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:47:21,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:47:21,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1084917904, now seen corresponding path program 1 times [2021-12-22 09:47:21,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:47:21,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205394859] [2021-12-22 09:47:21,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:47:21,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:47:21,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:47:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 61 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:47:21,414 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:47:21,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205394859] [2021-12-22 09:47:21,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205394859] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:47:21,414 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403494646] [2021-12-22 09:47:21,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:47:21,415 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:47:21,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:47:21,417 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) [2021-12-22 09:47:21,427 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:47:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:47:21,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 698 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:47:21,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:47:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:47:22,355 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:47:22,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403494646] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:47:22,355 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:47:22,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-12-22 09:47:22,356 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424254493] [2021-12-22 09:47:22,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:47:22,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:47:22,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:47:22,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:47:22,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:47:22,358 INFO L87 Difference]: Start difference. First operand 9987 states and 14233 transitions. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:27,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:47:27,483 INFO L93 Difference]: Finished difference Result 26790 states and 39374 transitions. [2021-12-22 09:47:27,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:47:27,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 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 578 [2021-12-22 09:47:27,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:47:27,513 INFO L225 Difference]: With dead ends: 26790 [2021-12-22 09:47:27,514 INFO L226 Difference]: Without dead ends: 18170 [2021-12-22 09:47:27,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 581 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-22 09:47:27,525 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 2531 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 4050 mSolverCounterSat, 1472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2531 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 5522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1472 IncrementalHoareTripleChecker+Valid, 4050 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:47:27,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2531 Valid, 813 Invalid, 5522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1472 Valid, 4050 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2021-12-22 09:47:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18170 states. [2021-12-22 09:47:27,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18170 to 18169. [2021-12-22 09:47:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18169 states, 18168 states have (on average 1.4180427124614707) internal successors, (25763), 18168 states have internal predecessors, (25763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:27,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18169 states to 18169 states and 25763 transitions. [2021-12-22 09:47:27,704 INFO L78 Accepts]: Start accepts. Automaton has 18169 states and 25763 transitions. Word has length 578 [2021-12-22 09:47:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:47:27,705 INFO L470 AbstractCegarLoop]: Abstraction has 18169 states and 25763 transitions. [2021-12-22 09:47:27,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 18169 states and 25763 transitions. [2021-12-22 09:47:27,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 586 [2021-12-22 09:47:27,712 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:47:27,712 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:47:27,733 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:47:27,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:47:27,923 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:47:27,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:47:27,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1177461922, now seen corresponding path program 1 times [2021-12-22 09:47:27,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:47:27,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695417297] [2021-12-22 09:47:27,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:47:27,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:47:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:47:28,154 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-22 09:47:28,154 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:47:28,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695417297] [2021-12-22 09:47:28,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695417297] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:47:28,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:47:28,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:47:28,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126232117] [2021-12-22 09:47:28,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:47:28,156 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:47:28,156 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:47:28,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:47:28,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:47:28,156 INFO L87 Difference]: Start difference. First operand 18169 states and 25763 transitions. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 2 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:32,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:47:32,872 INFO L93 Difference]: Finished difference Result 40438 states and 57708 transitions. [2021-12-22 09:47:32,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:47:32,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 2 states have internal predecessors, (502), 0 states have call successors, (0), 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 585 [2021-12-22 09:47:32,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:47:32,906 INFO L225 Difference]: With dead ends: 40438 [2021-12-22 09:47:32,907 INFO L226 Difference]: Without dead ends: 23636 [2021-12-22 09:47:32,925 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 [2021-12-22 09:47:32,926 INFO L933 BasicCegarLoop]: 686 mSDtfsCounter, 1391 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 3925 mSolverCounterSat, 1659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1391 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 5584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1659 IncrementalHoareTripleChecker+Valid, 3925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:47:32,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1391 Valid, 732 Invalid, 5584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1659 Valid, 3925 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-22 09:47:32,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23636 states. [2021-12-22 09:47:33,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23636 to 23632. [2021-12-22 09:47:33,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23632 states, 23631 states have (on average 1.3269857390715585) internal successors, (31358), 23631 states have internal predecessors, (31358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:33,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23632 states to 23632 states and 31358 transitions. [2021-12-22 09:47:33,150 INFO L78 Accepts]: Start accepts. Automaton has 23632 states and 31358 transitions. Word has length 585 [2021-12-22 09:47:33,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:47:33,151 INFO L470 AbstractCegarLoop]: Abstraction has 23632 states and 31358 transitions. [2021-12-22 09:47:33,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 2 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:33,151 INFO L276 IsEmpty]: Start isEmpty. Operand 23632 states and 31358 transitions. [2021-12-22 09:47:33,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 592 [2021-12-22 09:47:33,154 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:47:33,155 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:47:33,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:47:33,155 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:47:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:47:33,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1045989357, now seen corresponding path program 1 times [2021-12-22 09:47:33,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:47:33,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473010943] [2021-12-22 09:47:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:47:33,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:47:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:47:33,553 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 39 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:47:33,553 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:47:33,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473010943] [2021-12-22 09:47:33,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473010943] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:47:33,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029499499] [2021-12-22 09:47:33,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:47:33,555 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:47:33,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:47:33,556 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) [2021-12-22 09:47:33,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-22 09:47:33,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:47:33,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:47:33,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:47:34,374 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-12-22 09:47:34,375 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:47:34,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029499499] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:47:34,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:47:34,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-12-22 09:47:34,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387463134] [2021-12-22 09:47:34,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:47:34,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:47:34,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:47:34,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:47:34,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:47:34,377 INFO L87 Difference]: Start difference. First operand 23632 states and 31358 transitions. Second operand has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:39,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:47:39,759 INFO L93 Difference]: Finished difference Result 67757 states and 90811 transitions. [2021-12-22 09:47:39,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:47:39,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 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 591 [2021-12-22 09:47:39,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:47:39,809 INFO L225 Difference]: With dead ends: 67757 [2021-12-22 09:47:39,810 INFO L226 Difference]: Without dead ends: 45492 [2021-12-22 09:47:39,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 591 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-12-22 09:47:39,837 INFO L933 BasicCegarLoop]: 2083 mSDtfsCounter, 1643 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 4895 mSolverCounterSat, 1053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1643 SdHoareTripleChecker+Valid, 2185 SdHoareTripleChecker+Invalid, 5948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1053 IncrementalHoareTripleChecker+Valid, 4895 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2021-12-22 09:47:39,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1643 Valid, 2185 Invalid, 5948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1053 Valid, 4895 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2021-12-22 09:47:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45492 states. [2021-12-22 09:47:40,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45492 to 45478. [2021-12-22 09:47:40,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45478 states, 45477 states have (on average 1.3033181608285507) internal successors, (59271), 45477 states have internal predecessors, (59271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:40,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45478 states to 45478 states and 59271 transitions. [2021-12-22 09:47:40,367 INFO L78 Accepts]: Start accepts. Automaton has 45478 states and 59271 transitions. Word has length 591 [2021-12-22 09:47:40,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:47:40,368 INFO L470 AbstractCegarLoop]: Abstraction has 45478 states and 59271 transitions. [2021-12-22 09:47:40,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 167.33333333333334) internal successors, (502), 3 states have internal predecessors, (502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:47:40,368 INFO L276 IsEmpty]: Start isEmpty. Operand 45478 states and 59271 transitions. [2021-12-22 09:47:40,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2021-12-22 09:47:40,376 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:47:40,376 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:47:40,395 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-22 09:47:40,591 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,SelfDestructingSolverStorable6 [2021-12-22 09:47:40,592 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:47:40,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:47:40,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1991304213, now seen corresponding path program 1 times [2021-12-22 09:47:40,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:47:40,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377529620] [2021-12-22 09:47:40,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:47:40,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:47:40,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:47:40,808 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:47:40,809 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:47:40,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377529620] [2021-12-22 09:47:40,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377529620] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:47:40,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:47:40,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:47:40,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974394993] [2021-12-22 09:47:40,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:47:40,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:47:40,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:47:40,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:47:40,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:47:40,811 INFO L87 Difference]: Start difference. First operand 45478 states and 59271 transitions. Second operand has 3 states, 3 states have (on average 202.33333333333334) internal successors, (607), 3 states have internal predecessors, (607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)