./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.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 7334648c93226b30578843a7fb29bf568bbbf46b83ab126a034690ad505a2960 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 01:33:16,076 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 01:33:16,077 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 01:33:16,095 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 01:33:16,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 01:33:16,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 01:33:16,097 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 01:33:16,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 01:33:16,099 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 01:33:16,100 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 01:33:16,100 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 01:33:16,101 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 01:33:16,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 01:33:16,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 01:33:16,103 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 01:33:16,104 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 01:33:16,104 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 01:33:16,105 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 01:33:16,106 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 01:33:16,107 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 01:33:16,108 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 01:33:16,109 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 01:33:16,109 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 01:33:16,110 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 01:33:16,112 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 01:33:16,112 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 01:33:16,112 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 01:33:16,113 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 01:33:16,113 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 01:33:16,135 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 01:33:16,136 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 01:33:16,136 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 01:33:16,137 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 01:33:16,138 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 01:33:16,141 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 01:33:16,141 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 01:33:16,141 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 01:33:16,142 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 01:33:16,142 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 01:33:16,143 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 01:33:16,144 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 01:33:16,145 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 01:33:16,173 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 01:33:16,174 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 01:33:16,175 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 01:33:16,175 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 01:33:16,175 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 01:33:16,176 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 01:33:16,176 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 01:33:16,176 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 01:33:16,177 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 01:33:16,177 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 01:33:16,177 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 01:33:16,178 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 01:33:16,178 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 01:33:16,178 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 01:33:16,178 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 01:33:16,178 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 01:33:16,178 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 01:33:16,178 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 01:33:16,178 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 01:33:16,179 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 01:33:16,179 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 01:33:16,179 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 01:33:16,179 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 01:33:16,179 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 01:33:16,179 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:33:16,179 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 01:33:16,180 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 01:33:16,180 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 01:33:16,180 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 01:33:16,180 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 01:33:16,180 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 01:33:16,180 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 01:33:16,181 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 01:33:16,181 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7334648c93226b30578843a7fb29bf568bbbf46b83ab126a034690ad505a2960 [2021-12-28 01:33:16,450 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 01:33:16,464 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 01:33:16,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 01:33:16,466 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 01:33:16,467 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 01:33:16,468 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-28 01:33:16,522 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b9f86c0c/10a6819e4db6445d8a73f15f5ee91415/FLAGec25e38cf [2021-12-28 01:33:16,914 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 01:33:16,915 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-28 01:33:16,921 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b9f86c0c/10a6819e4db6445d8a73f15f5ee91415/FLAGec25e38cf [2021-12-28 01:33:16,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9b9f86c0c/10a6819e4db6445d8a73f15f5ee91415 [2021-12-28 01:33:16,936 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 01:33:16,937 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 01:33:16,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 01:33:16,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 01:33:16,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 01:33:16,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:33:16" (1/1) ... [2021-12-28 01:33:16,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2575ce5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:16, skipping insertion in model container [2021-12-28 01:33:16,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 01:33:16" (1/1) ... [2021-12-28 01:33:16,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 01:33:16,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 01:33:17,190 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6730,6743] [2021-12-28 01:33:17,215 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:33:17,224 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 01:33:17,257 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6730,6743] [2021-12-28 01:33:17,277 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 01:33:17,291 INFO L208 MainTranslator]: Completed translation [2021-12-28 01:33:17,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:17 WrapperNode [2021-12-28 01:33:17,292 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 01:33:17,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 01:33:17,293 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 01:33:17,293 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 01:33:17,297 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:17" (1/1) ... [2021-12-28 01:33:17,303 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:17" (1/1) ... [2021-12-28 01:33:17,324 INFO L137 Inliner]: procedures = 26, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 491 [2021-12-28 01:33:17,324 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 01:33:17,325 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 01:33:17,325 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 01:33:17,325 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 01:33:17,335 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:17" (1/1) ... [2021-12-28 01:33:17,335 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:17" (1/1) ... [2021-12-28 01:33:17,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:17" (1/1) ... [2021-12-28 01:33:17,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:17" (1/1) ... [2021-12-28 01:33:17,342 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:17" (1/1) ... [2021-12-28 01:33:17,345 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:17" (1/1) ... [2021-12-28 01:33:17,346 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:17" (1/1) ... [2021-12-28 01:33:17,348 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 01:33:17,349 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 01:33:17,349 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 01:33:17,349 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 01:33:17,350 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:17" (1/1) ... [2021-12-28 01:33:17,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 01:33:17,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 01:33:17,386 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 01:33:17,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 01:33:17,413 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 01:33:17,413 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 01:33:17,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 01:33:17,414 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 01:33:17,514 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 01:33:17,516 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 01:33:17,963 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 01:33:17,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 01:33:17,971 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-28 01:33:17,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:33:17 BoogieIcfgContainer [2021-12-28 01:33:17,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 01:33:17,975 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 01:33:17,976 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 01:33:17,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 01:33:17,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 01:33:16" (1/3) ... [2021-12-28 01:33:17,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edff58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:33:17, skipping insertion in model container [2021-12-28 01:33:17,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 01:33:17" (2/3) ... [2021-12-28 01:33:17,979 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2edff58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 01:33:17, skipping insertion in model container [2021-12-28 01:33:17,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 01:33:17" (3/3) ... [2021-12-28 01:33:17,980 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2021-12-28 01:33:17,983 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 01:33:17,983 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 01:33:18,026 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 01:33:18,033 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 01:33:18,034 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 01:33:18,045 INFO L276 IsEmpty]: Start isEmpty. Operand has 118 states, 116 states have (on average 1.7327586206896552) internal successors, (201), 117 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:18,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-28 01:33:18,054 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:18,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:18,055 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:18,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:18,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1122612567, now seen corresponding path program 1 times [2021-12-28 01:33:18,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:18,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822682663] [2021-12-28 01:33:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:18,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:18,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:18,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:18,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:18,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822682663] [2021-12-28 01:33:18,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822682663] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:18,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:18,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:33:18,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064753790] [2021-12-28 01:33:18,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:18,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:33:18,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:18,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:33:18,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:18,395 INFO L87 Difference]: Start difference. First operand has 118 states, 116 states have (on average 1.7327586206896552) internal successors, (201), 117 states have internal predecessors, (201), 0 states have call successors, (0), 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 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:18,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:18,505 INFO L93 Difference]: Finished difference Result 260 states and 422 transitions. [2021-12-28 01:33:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:33:18,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 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 73 [2021-12-28 01:33:18,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:18,515 INFO L225 Difference]: With dead ends: 260 [2021-12-28 01:33:18,531 INFO L226 Difference]: Without dead ends: 179 [2021-12-28 01:33:18,534 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:18,537 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 133 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:18,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 403 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:33:18,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-12-28 01:33:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2021-12-28 01:33:18,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.4545454545454546) internal successors, (256), 176 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:18,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 256 transitions. [2021-12-28 01:33:18,597 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 256 transitions. Word has length 73 [2021-12-28 01:33:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:18,597 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 256 transitions. [2021-12-28 01:33:18,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 3 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 256 transitions. [2021-12-28 01:33:18,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-28 01:33:18,599 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:18,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:18,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 01:33:18,600 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:18,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1622464055, now seen corresponding path program 1 times [2021-12-28 01:33:18,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:18,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511677345] [2021-12-28 01:33:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:18,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:18,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:18,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:18,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511677345] [2021-12-28 01:33:18,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511677345] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:18,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:18,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:33:18,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746567543] [2021-12-28 01:33:18,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:18,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:33:18,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:18,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:33:18,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:18,686 INFO L87 Difference]: Start difference. First operand 177 states and 256 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:18,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:18,725 INFO L93 Difference]: Finished difference Result 429 states and 656 transitions. [2021-12-28 01:33:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:33:18,726 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 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 74 [2021-12-28 01:33:18,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:18,731 INFO L225 Difference]: With dead ends: 429 [2021-12-28 01:33:18,731 INFO L226 Difference]: Without dead ends: 295 [2021-12-28 01:33:18,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:18,733 INFO L933 BasicCegarLoop]: 227 mSDtfsCounter, 94 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:18,733 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 344 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:33:18,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2021-12-28 01:33:18,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 293. [2021-12-28 01:33:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.5068493150684932) internal successors, (440), 292 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 440 transitions. [2021-12-28 01:33:18,755 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 440 transitions. Word has length 74 [2021-12-28 01:33:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:18,755 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 440 transitions. [2021-12-28 01:33:18,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 440 transitions. [2021-12-28 01:33:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-28 01:33:18,757 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:18,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:18,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-28 01:33:18,758 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:18,758 INFO L85 PathProgramCache]: Analyzing trace with hash 549627260, now seen corresponding path program 1 times [2021-12-28 01:33:18,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:18,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106077079] [2021-12-28 01:33:18,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:18,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:18,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:18,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:18,808 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:18,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106077079] [2021-12-28 01:33:18,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106077079] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:18,809 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:18,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:33:18,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262897260] [2021-12-28 01:33:18,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:18,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:33:18,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:18,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:33:18,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:18,810 INFO L87 Difference]: Start difference. First operand 293 states and 440 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:18,838 INFO L93 Difference]: Finished difference Result 761 states and 1182 transitions. [2021-12-28 01:33:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:33:18,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 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 75 [2021-12-28 01:33:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:18,840 INFO L225 Difference]: With dead ends: 761 [2021-12-28 01:33:18,840 INFO L226 Difference]: Without dead ends: 511 [2021-12-28 01:33:18,841 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:18,842 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 89 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:18,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 340 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:33:18,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2021-12-28 01:33:18,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 509. [2021-12-28 01:33:18,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.5354330708661417) internal successors, (780), 508 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:18,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 780 transitions. [2021-12-28 01:33:18,876 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 780 transitions. Word has length 75 [2021-12-28 01:33:18,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:18,876 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 780 transitions. [2021-12-28 01:33:18,877 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:18,877 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 780 transitions. [2021-12-28 01:33:18,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-28 01:33:18,878 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:18,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:18,878 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-28 01:33:18,878 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:18,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:18,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1347673334, now seen corresponding path program 1 times [2021-12-28 01:33:18,879 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:18,879 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782717385] [2021-12-28 01:33:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:18,879 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:18,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:18,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:18,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782717385] [2021-12-28 01:33:18,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782717385] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:18,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:18,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:33:18,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863874229] [2021-12-28 01:33:18,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:18,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:33:18,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:18,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:33:18,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:18,927 INFO L87 Difference]: Start difference. First operand 509 states and 780 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:18,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:18,963 INFO L93 Difference]: Finished difference Result 1377 states and 2150 transitions. [2021-12-28 01:33:18,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:33:18,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 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 76 [2021-12-28 01:33:18,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:18,972 INFO L225 Difference]: With dead ends: 1377 [2021-12-28 01:33:18,972 INFO L226 Difference]: Without dead ends: 911 [2021-12-28 01:33:18,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:18,974 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 84 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:18,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 336 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:33:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 911 states. [2021-12-28 01:33:19,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 911 to 909. [2021-12-28 01:33:19,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 1.5462555066079295) internal successors, (1404), 908 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:19,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 1404 transitions. [2021-12-28 01:33:19,013 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 1404 transitions. Word has length 76 [2021-12-28 01:33:19,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:19,013 INFO L470 AbstractCegarLoop]: Abstraction has 909 states and 1404 transitions. [2021-12-28 01:33:19,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:19,014 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 1404 transitions. [2021-12-28 01:33:19,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-28 01:33:19,014 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:19,014 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:19,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-28 01:33:19,015 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:19,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:19,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1762980839, now seen corresponding path program 1 times [2021-12-28 01:33:19,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:19,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593023348] [2021-12-28 01:33:19,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:19,016 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:19,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:19,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:19,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:19,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593023348] [2021-12-28 01:33:19,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593023348] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:19,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:19,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:33:19,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481536533] [2021-12-28 01:33:19,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:19,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:33:19,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:19,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:33:19,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:19,056 INFO L87 Difference]: Start difference. First operand 909 states and 1404 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:19,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:19,145 INFO L93 Difference]: Finished difference Result 2513 states and 3918 transitions. [2021-12-28 01:33:19,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:33:19,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 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 77 [2021-12-28 01:33:19,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:19,151 INFO L225 Difference]: With dead ends: 2513 [2021-12-28 01:33:19,151 INFO L226 Difference]: Without dead ends: 1647 [2021-12-28 01:33:19,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:19,153 INFO L933 BasicCegarLoop]: 203 mSDtfsCounter, 79 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:19,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 332 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:33:19,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-12-28 01:33:19,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1645. [2021-12-28 01:33:19,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 1.5450121654501217) internal successors, (2540), 1644 states have internal predecessors, (2540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:19,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 2540 transitions. [2021-12-28 01:33:19,230 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 2540 transitions. Word has length 77 [2021-12-28 01:33:19,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:19,231 INFO L470 AbstractCegarLoop]: Abstraction has 1645 states and 2540 transitions. [2021-12-28 01:33:19,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:19,231 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 2540 transitions. [2021-12-28 01:33:19,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-28 01:33:19,232 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:19,232 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:19,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-28 01:33:19,232 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:19,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:19,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1296361934, now seen corresponding path program 1 times [2021-12-28 01:33:19,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:19,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742259893] [2021-12-28 01:33:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:19,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:19,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:19,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742259893] [2021-12-28 01:33:19,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742259893] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:19,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:19,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:33:19,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933630083] [2021-12-28 01:33:19,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:19,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:33:19,305 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:19,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:33:19,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:33:19,306 INFO L87 Difference]: Start difference. First operand 1645 states and 2540 transitions. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:20,519 INFO L93 Difference]: Finished difference Result 20869 states and 32504 transitions. [2021-12-28 01:33:20,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-28 01:33:20,519 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 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 78 [2021-12-28 01:33:20,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:20,574 INFO L225 Difference]: With dead ends: 20869 [2021-12-28 01:33:20,574 INFO L226 Difference]: Without dead ends: 19267 [2021-12-28 01:33:20,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-12-28 01:33:20,584 INFO L933 BasicCegarLoop]: 153 mSDtfsCounter, 1770 mSDsluCounter, 2750 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1770 SdHoareTripleChecker+Valid, 2903 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:20,584 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1770 Valid, 2903 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:33:20,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19267 states. [2021-12-28 01:33:20,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19267 to 3245. [2021-12-28 01:33:20,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3245 states, 3244 states have (on average 1.532675709001233) internal successors, (4972), 3244 states have internal predecessors, (4972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:21,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3245 states to 3245 states and 4972 transitions. [2021-12-28 01:33:21,006 INFO L78 Accepts]: Start accepts. Automaton has 3245 states and 4972 transitions. Word has length 78 [2021-12-28 01:33:21,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:21,006 INFO L470 AbstractCegarLoop]: Abstraction has 3245 states and 4972 transitions. [2021-12-28 01:33:21,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:21,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3245 states and 4972 transitions. [2021-12-28 01:33:21,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-28 01:33:21,009 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:21,010 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:21,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-28 01:33:21,010 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:21,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:21,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1185122290, now seen corresponding path program 1 times [2021-12-28 01:33:21,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:21,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524274998] [2021-12-28 01:33:21,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:21,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:21,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:21,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:21,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524274998] [2021-12-28 01:33:21,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524274998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:21,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:21,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:33:21,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995325679] [2021-12-28 01:33:21,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:21,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:33:21,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:21,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:33:21,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:21,085 INFO L87 Difference]: Start difference. First operand 3245 states and 4972 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:21,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:21,667 INFO L93 Difference]: Finished difference Result 9297 states and 14222 transitions. [2021-12-28 01:33:21,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:33:21,668 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-28 01:33:21,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:21,693 INFO L225 Difference]: With dead ends: 9297 [2021-12-28 01:33:21,693 INFO L226 Difference]: Without dead ends: 6095 [2021-12-28 01:33:21,696 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:21,698 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 69 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:21,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 262 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:33:21,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6095 states. [2021-12-28 01:33:22,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6095 to 6029. [2021-12-28 01:33:22,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6029 states, 6028 states have (on average 1.504313205043132) internal successors, (9068), 6028 states have internal predecessors, (9068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:22,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6029 states to 6029 states and 9068 transitions. [2021-12-28 01:33:22,220 INFO L78 Accepts]: Start accepts. Automaton has 6029 states and 9068 transitions. Word has length 80 [2021-12-28 01:33:22,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:22,220 INFO L470 AbstractCegarLoop]: Abstraction has 6029 states and 9068 transitions. [2021-12-28 01:33:22,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 6029 states and 9068 transitions. [2021-12-28 01:33:22,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-28 01:33:22,221 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:22,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:22,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-28 01:33:22,222 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:22,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:22,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1164119635, now seen corresponding path program 1 times [2021-12-28 01:33:22,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:22,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714739460] [2021-12-28 01:33:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:22,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:22,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:22,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:22,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:22,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714739460] [2021-12-28 01:33:22,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714739460] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:22,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:22,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:33:22,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504275425] [2021-12-28 01:33:22,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:22,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:33:22,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:22,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:33:22,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:33:22,419 INFO L87 Difference]: Start difference. First operand 6029 states and 9068 transitions. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:23,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:23,078 INFO L93 Difference]: Finished difference Result 12017 states and 18094 transitions. [2021-12-28 01:33:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:33:23,078 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 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 80 [2021-12-28 01:33:23,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:23,089 INFO L225 Difference]: With dead ends: 12017 [2021-12-28 01:33:23,089 INFO L226 Difference]: Without dead ends: 6031 [2021-12-28 01:33:23,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-12-28 01:33:23,097 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 660 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 660 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:23,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [660 Valid, 747 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:33:23,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6031 states. [2021-12-28 01:33:23,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6031 to 6029. [2021-12-28 01:33:23,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6029 states, 6028 states have (on average 1.493696084936961) internal successors, (9004), 6028 states have internal predecessors, (9004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:23,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6029 states to 6029 states and 9004 transitions. [2021-12-28 01:33:23,574 INFO L78 Accepts]: Start accepts. Automaton has 6029 states and 9004 transitions. Word has length 80 [2021-12-28 01:33:23,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:23,574 INFO L470 AbstractCegarLoop]: Abstraction has 6029 states and 9004 transitions. [2021-12-28 01:33:23,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:23,575 INFO L276 IsEmpty]: Start isEmpty. Operand 6029 states and 9004 transitions. [2021-12-28 01:33:23,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-28 01:33:23,575 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:23,576 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:23,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-28 01:33:23,576 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:23,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:23,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1866969369, now seen corresponding path program 1 times [2021-12-28 01:33:23,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:23,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681725488] [2021-12-28 01:33:23,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:23,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:23,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:23,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:23,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681725488] [2021-12-28 01:33:23,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681725488] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:23,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:23,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-28 01:33:23,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963484015] [2021-12-28 01:33:23,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:23,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-28 01:33:23,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:23,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-28 01:33:23,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:23,622 INFO L87 Difference]: Start difference. First operand 6029 states and 9004 transitions. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:24,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:24,222 INFO L93 Difference]: Finished difference Result 11796 states and 17778 transitions. [2021-12-28 01:33:24,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-28 01:33:24,223 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-28 01:33:24,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:24,236 INFO L225 Difference]: With dead ends: 11796 [2021-12-28 01:33:24,237 INFO L226 Difference]: Without dead ends: 8593 [2021-12-28 01:33:24,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-28 01:33:24,245 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 101 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:24,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 356 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:33:24,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8593 states. [2021-12-28 01:33:25,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8593 to 8591. [2021-12-28 01:33:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 1.4917345750873108) internal successors, (12814), 8590 states have internal predecessors, (12814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 12814 transitions. [2021-12-28 01:33:25,098 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 12814 transitions. Word has length 81 [2021-12-28 01:33:25,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:25,099 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 12814 transitions. [2021-12-28 01:33:25,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:25,100 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 12814 transitions. [2021-12-28 01:33:25,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-28 01:33:25,100 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:25,100 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:25,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-28 01:33:25,101 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:25,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:25,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1729879629, now seen corresponding path program 1 times [2021-12-28 01:33:25,102 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:25,102 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422274317] [2021-12-28 01:33:25,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:25,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:25,158 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:25,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422274317] [2021-12-28 01:33:25,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422274317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:25,159 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:25,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:33:25,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885334139] [2021-12-28 01:33:25,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:25,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:33:25,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:25,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:33:25,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:33:25,161 INFO L87 Difference]: Start difference. First operand 8591 states and 12814 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:25,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:25,882 INFO L93 Difference]: Finished difference Result 17137 states and 25583 transitions. [2021-12-28 01:33:25,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:33:25,883 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-28 01:33:25,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:25,897 INFO L225 Difference]: With dead ends: 17137 [2021-12-28 01:33:25,897 INFO L226 Difference]: Without dead ends: 8591 [2021-12-28 01:33:25,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:33:25,907 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 360 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:25,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 133 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:33:25,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8591 states. [2021-12-28 01:33:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8591 to 8591. [2021-12-28 01:33:26,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 1.480558789289872) internal successors, (12718), 8590 states have internal predecessors, (12718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:26,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 12718 transitions. [2021-12-28 01:33:26,597 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 12718 transitions. Word has length 81 [2021-12-28 01:33:26,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:26,597 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 12718 transitions. [2021-12-28 01:33:26,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:26,597 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 12718 transitions. [2021-12-28 01:33:26,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-28 01:33:26,600 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:26,600 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:26,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-28 01:33:26,601 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:26,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:26,601 INFO L85 PathProgramCache]: Analyzing trace with hash -864347240, now seen corresponding path program 1 times [2021-12-28 01:33:26,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:26,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459743317] [2021-12-28 01:33:26,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:26,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:26,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:26,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:26,652 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459743317] [2021-12-28 01:33:26,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459743317] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:26,652 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:26,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:33:26,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767769020] [2021-12-28 01:33:26,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:26,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:33:26,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:26,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:33:26,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:33:26,654 INFO L87 Difference]: Start difference. First operand 8591 states and 12718 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:27,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:27,423 INFO L93 Difference]: Finished difference Result 17137 states and 25391 transitions. [2021-12-28 01:33:27,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:33:27,424 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-28 01:33:27,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:27,439 INFO L225 Difference]: With dead ends: 17137 [2021-12-28 01:33:27,439 INFO L226 Difference]: Without dead ends: 8591 [2021-12-28 01:33:27,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:33:27,450 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 370 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:27,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 125 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:33:27,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8591 states. [2021-12-28 01:33:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8591 to 8591. [2021-12-28 01:33:28,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 1.4693830034924331) internal successors, (12622), 8590 states have internal predecessors, (12622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:28,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 12622 transitions. [2021-12-28 01:33:28,406 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 12622 transitions. Word has length 81 [2021-12-28 01:33:28,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:28,407 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 12622 transitions. [2021-12-28 01:33:28,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:28,407 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 12622 transitions. [2021-12-28 01:33:28,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-28 01:33:28,410 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:28,410 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:28,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-28 01:33:28,410 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:28,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:28,411 INFO L85 PathProgramCache]: Analyzing trace with hash -736261933, now seen corresponding path program 1 times [2021-12-28 01:33:28,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:28,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303018821] [2021-12-28 01:33:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:28,411 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:28,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:28,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:28,468 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303018821] [2021-12-28 01:33:28,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303018821] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:28,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:28,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:33:28,469 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621957705] [2021-12-28 01:33:28,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:28,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:33:28,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:28,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:33:28,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:33:28,470 INFO L87 Difference]: Start difference. First operand 8591 states and 12622 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:29,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:29,472 INFO L93 Difference]: Finished difference Result 17137 states and 25199 transitions. [2021-12-28 01:33:29,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:33:29,472 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-28 01:33:29,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:29,562 INFO L225 Difference]: With dead ends: 17137 [2021-12-28 01:33:29,563 INFO L226 Difference]: Without dead ends: 8591 [2021-12-28 01:33:29,569 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:33:29,570 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 393 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:29,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 109 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:33:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8591 states. [2021-12-28 01:33:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8591 to 8591. [2021-12-28 01:33:30,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 1.4582072176949943) internal successors, (12526), 8590 states have internal predecessors, (12526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:30,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 12526 transitions. [2021-12-28 01:33:30,313 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 12526 transitions. Word has length 81 [2021-12-28 01:33:30,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:30,313 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 12526 transitions. [2021-12-28 01:33:30,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:30,314 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 12526 transitions. [2021-12-28 01:33:30,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-28 01:33:30,314 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:30,314 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:30,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-28 01:33:30,315 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:30,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:30,316 INFO L85 PathProgramCache]: Analyzing trace with hash -367990706, now seen corresponding path program 1 times [2021-12-28 01:33:30,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:30,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697483842] [2021-12-28 01:33:30,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:30,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:30,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:30,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:30,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697483842] [2021-12-28 01:33:30,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697483842] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:30,359 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:30,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-28 01:33:30,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982044253] [2021-12-28 01:33:30,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:30,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:33:30,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:30,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:33:30,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:33:30,361 INFO L87 Difference]: Start difference. First operand 8591 states and 12526 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:31,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:31,193 INFO L93 Difference]: Finished difference Result 17137 states and 25007 transitions. [2021-12-28 01:33:31,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-28 01:33:31,195 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-28 01:33:31,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:31,206 INFO L225 Difference]: With dead ends: 17137 [2021-12-28 01:33:31,206 INFO L226 Difference]: Without dead ends: 8591 [2021-12-28 01:33:31,213 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-28 01:33:31,219 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 377 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:31,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [377 Valid, 117 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:33:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8591 states. [2021-12-28 01:33:31,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8591 to 8591. [2021-12-28 01:33:31,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8591 states, 8590 states have (on average 1.4470314318975552) internal successors, (12430), 8590 states have internal predecessors, (12430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:32,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8591 states to 8591 states and 12430 transitions. [2021-12-28 01:33:32,006 INFO L78 Accepts]: Start accepts. Automaton has 8591 states and 12430 transitions. Word has length 81 [2021-12-28 01:33:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:32,007 INFO L470 AbstractCegarLoop]: Abstraction has 8591 states and 12430 transitions. [2021-12-28 01:33:32,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 8591 states and 12430 transitions. [2021-12-28 01:33:32,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-28 01:33:32,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:32,008 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 01:33:32,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-28 01:33:32,008 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:32,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:32,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1130854413, now seen corresponding path program 1 times [2021-12-28 01:33:32,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:32,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024044927] [2021-12-28 01:33:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:32,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:32,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 01:33:32,061 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:32,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024044927] [2021-12-28 01:33:32,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024044927] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:32,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:32,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 01:33:32,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835089299] [2021-12-28 01:33:32,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:32,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-28 01:33:32,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:32,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-28 01:33:32,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-28 01:33:32,063 INFO L87 Difference]: Start difference. First operand 8591 states and 12430 transitions. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:33,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:33,569 INFO L93 Difference]: Finished difference Result 15485 states and 22341 transitions. [2021-12-28 01:33:33,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 01:33:33,570 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 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 81 [2021-12-28 01:33:33,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:33,592 INFO L225 Difference]: With dead ends: 15485 [2021-12-28 01:33:33,592 INFO L226 Difference]: Without dead ends: 15483 [2021-12-28 01:33:33,597 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-28 01:33:33,598 INFO L933 BasicCegarLoop]: 201 mSDtfsCounter, 204 mSDsluCounter, 494 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 695 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:33,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 695 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 01:33:33,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15483 states. [2021-12-28 01:33:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15483 to 8847. [2021-12-28 01:33:34,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8847 states, 8846 states have (on average 1.4304770517748135) internal successors, (12654), 8846 states have internal predecessors, (12654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:34,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8847 states to 8847 states and 12654 transitions. [2021-12-28 01:33:34,763 INFO L78 Accepts]: Start accepts. Automaton has 8847 states and 12654 transitions. Word has length 81 [2021-12-28 01:33:34,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:34,764 INFO L470 AbstractCegarLoop]: Abstraction has 8847 states and 12654 transitions. [2021-12-28 01:33:34,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:34,764 INFO L276 IsEmpty]: Start isEmpty. Operand 8847 states and 12654 transitions. [2021-12-28 01:33:34,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 01:33:34,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:34,772 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:33:34,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-28 01:33:34,772 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:34,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:34,773 INFO L85 PathProgramCache]: Analyzing trace with hash 905576252, now seen corresponding path program 1 times [2021-12-28 01:33:34,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:34,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050022713] [2021-12-28 01:33:34,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:34,774 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:34,854 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-28 01:33:34,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:34,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050022713] [2021-12-28 01:33:34,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050022713] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:34,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:34,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:33:34,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471209290] [2021-12-28 01:33:34,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:34,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:33:34,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:34,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:33:34,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:33:34,857 INFO L87 Difference]: Start difference. First operand 8847 states and 12654 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:41,104 INFO L93 Difference]: Finished difference Result 63293 states and 90581 transitions. [2021-12-28 01:33:41,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:33:41,104 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 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 112 [2021-12-28 01:33:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:41,196 INFO L225 Difference]: With dead ends: 63293 [2021-12-28 01:33:41,196 INFO L226 Difference]: Without dead ends: 54491 [2021-12-28 01:33:41,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:33:41,217 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 1550 mSDsluCounter, 875 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1550 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:41,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1550 Valid, 1131 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:33:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54491 states. [2021-12-28 01:33:43,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54491 to 17647. [2021-12-28 01:33:43,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17647 states, 17646 states have (on average 1.4261589028675055) internal successors, (25166), 17646 states have internal predecessors, (25166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:43,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17647 states to 17647 states and 25166 transitions. [2021-12-28 01:33:43,739 INFO L78 Accepts]: Start accepts. Automaton has 17647 states and 25166 transitions. Word has length 112 [2021-12-28 01:33:43,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:43,740 INFO L470 AbstractCegarLoop]: Abstraction has 17647 states and 25166 transitions. [2021-12-28 01:33:43,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:43,740 INFO L276 IsEmpty]: Start isEmpty. Operand 17647 states and 25166 transitions. [2021-12-28 01:33:43,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 01:33:43,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:43,744 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:33:43,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-28 01:33:43,745 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:43,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:43,745 INFO L85 PathProgramCache]: Analyzing trace with hash -818965810, now seen corresponding path program 1 times [2021-12-28 01:33:43,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:43,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12649920] [2021-12-28 01:33:43,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:43,746 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-28 01:33:43,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:43,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12649920] [2021-12-28 01:33:43,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12649920] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:43,849 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:43,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:33:43,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622177096] [2021-12-28 01:33:43,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:43,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:33:43,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:43,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:33:43,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:33:43,850 INFO L87 Difference]: Start difference. First operand 17647 states and 25166 transitions. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:51,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:33:51,752 INFO L93 Difference]: Finished difference Result 72093 states and 103093 transitions. [2021-12-28 01:33:51,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:33:51,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 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 112 [2021-12-28 01:33:51,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:33:51,853 INFO L225 Difference]: With dead ends: 72093 [2021-12-28 01:33:51,853 INFO L226 Difference]: Without dead ends: 63291 [2021-12-28 01:33:51,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:33:51,879 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 1441 mSDsluCounter, 922 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1441 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:33:51,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1441 Valid, 1178 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:33:51,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63291 states. [2021-12-28 01:33:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63291 to 30863. [2021-12-28 01:33:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30863 states, 30862 states have (on average 1.4209707731190462) internal successors, (43854), 30862 states have internal predecessors, (43854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:56,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30863 states to 30863 states and 43854 transitions. [2021-12-28 01:33:56,319 INFO L78 Accepts]: Start accepts. Automaton has 30863 states and 43854 transitions. Word has length 112 [2021-12-28 01:33:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:33:56,320 INFO L470 AbstractCegarLoop]: Abstraction has 30863 states and 43854 transitions. [2021-12-28 01:33:56,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:33:56,320 INFO L276 IsEmpty]: Start isEmpty. Operand 30863 states and 43854 transitions. [2021-12-28 01:33:56,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 01:33:56,324 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:33:56,325 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:33:56,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-28 01:33:56,325 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:33:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:33:56,325 INFO L85 PathProgramCache]: Analyzing trace with hash 334980296, now seen corresponding path program 1 times [2021-12-28 01:33:56,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:33:56,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952812388] [2021-12-28 01:33:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:33:56,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:33:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:33:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-28 01:33:56,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:33:56,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952812388] [2021-12-28 01:33:56,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952812388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:33:56,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:33:56,388 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:33:56,388 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796033230] [2021-12-28 01:33:56,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:33:56,388 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:33:56,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:33:56,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:33:56,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:33:56,389 INFO L87 Difference]: Start difference. First operand 30863 states and 43854 transitions. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2021-12-28 01:34:06,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:06,394 INFO L93 Difference]: Finished difference Result 80893 states and 115605 transitions. [2021-12-28 01:34:06,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:34:06,394 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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 112 [2021-12-28 01:34:06,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:06,499 INFO L225 Difference]: With dead ends: 80893 [2021-12-28 01:34:06,500 INFO L226 Difference]: Without dead ends: 72091 [2021-12-28 01:34:06,523 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:34:06,524 INFO L933 BasicCegarLoop]: 256 mSDtfsCounter, 1273 mSDsluCounter, 996 mSDsCounter, 0 mSdLazyCounter, 114 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1273 SdHoareTripleChecker+Valid, 1252 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:06,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1273 Valid, 1252 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 114 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:34:06,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72091 states. [2021-12-28 01:34:12,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72091 to 39663. [2021-12-28 01:34:12,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39663 states, 39662 states have (on average 1.4211587917906308) internal successors, (56366), 39662 states have internal predecessors, (56366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39663 states to 39663 states and 56366 transitions. [2021-12-28 01:34:12,879 INFO L78 Accepts]: Start accepts. Automaton has 39663 states and 56366 transitions. Word has length 112 [2021-12-28 01:34:12,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 01:34:12,879 INFO L470 AbstractCegarLoop]: Abstraction has 39663 states and 56366 transitions. [2021-12-28 01:34:12,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 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) [2021-12-28 01:34:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 39663 states and 56366 transitions. [2021-12-28 01:34:12,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-12-28 01:34:12,884 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 01:34:12,884 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-28 01:34:12,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-28 01:34:12,884 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 01:34:12,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 01:34:12,885 INFO L85 PathProgramCache]: Analyzing trace with hash -522920382, now seen corresponding path program 1 times [2021-12-28 01:34:12,885 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 01:34:12,885 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902611198] [2021-12-28 01:34:12,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 01:34:12,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 01:34:12,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 01:34:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-28 01:34:12,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 01:34:12,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902611198] [2021-12-28 01:34:12,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902611198] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 01:34:12,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 01:34:12,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-28 01:34:12,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804072003] [2021-12-28 01:34:12,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 01:34:12,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-28 01:34:12,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 01:34:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-28 01:34:12,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-12-28 01:34:12,944 INFO L87 Difference]: Start difference. First operand 39663 states and 56366 transitions. Second operand has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-28 01:34:24,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 01:34:24,851 INFO L93 Difference]: Finished difference Result 89693 states and 128117 transitions. [2021-12-28 01:34:24,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-28 01:34:24,851 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 13.0) internal successors, (104), 8 states have internal predecessors, (104), 0 states have call successors, (0), 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 112 [2021-12-28 01:34:24,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 01:34:24,988 INFO L225 Difference]: With dead ends: 89693 [2021-12-28 01:34:24,988 INFO L226 Difference]: Without dead ends: 80891 [2021-12-28 01:34:25,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-12-28 01:34:25,016 INFO L933 BasicCegarLoop]: 257 mSDtfsCounter, 1268 mSDsluCounter, 1095 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1268 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-28 01:34:25,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1268 Valid, 1352 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-28 01:34:25,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80891 states.