./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label40.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label40.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 5822f6dcecb89719be961a38493299a8716c4a47f733fff54adb51e7e48a109b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 04:40:26,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 04:40:26,928 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 04:40:26,988 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 04:40:26,988 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 04:40:26,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 04:40:26,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 04:40:26,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 04:40:26,995 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 04:40:26,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 04:40:26,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 04:40:27,001 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 04:40:27,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 04:40:27,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 04:40:27,005 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 04:40:27,010 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 04:40:27,011 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 04:40:27,012 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 04:40:27,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 04:40:27,016 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 04:40:27,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 04:40:27,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 04:40:27,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 04:40:27,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 04:40:27,025 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 04:40:27,027 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 04:40:27,028 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 04:40:27,028 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 04:40:27,029 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 04:40:27,030 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 04:40:27,030 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 04:40:27,031 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 04:40:27,031 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 04:40:27,032 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 04:40:27,034 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 04:40:27,034 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 04:40:27,035 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 04:40:27,035 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 04:40:27,035 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 04:40:27,036 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 04:40:27,036 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 04:40:27,037 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 04:40:27,062 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 04:40:27,062 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 04:40:27,063 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 04:40:27,063 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 04:40:27,064 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 04:40:27,064 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 04:40:27,065 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 04:40:27,065 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 04:40:27,065 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 04:40:27,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 04:40:27,066 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 04:40:27,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 04:40:27,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 04:40:27,066 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 04:40:27,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 04:40:27,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 04:40:27,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 04:40:27,067 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 04:40:27,067 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 04:40:27,068 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 04:40:27,068 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 04:40:27,068 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 04:40:27,068 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 04:40:27,068 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 04:40:27,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:40:27,069 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 04:40:27,069 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 04:40:27,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 04:40:27,070 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 04:40:27,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 04:40:27,070 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 04:40:27,071 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 04:40:27,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 04:40:27,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 04:40:27,071 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5822f6dcecb89719be961a38493299a8716c4a47f733fff54adb51e7e48a109b [2021-12-17 04:40:27,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 04:40:27,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 04:40:27,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 04:40:27,300 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 04:40:27,300 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 04:40:27,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label40.c [2021-12-17 04:40:27,358 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c92fab01/ada51c2935a4481f9dca575167ad8eea/FLAG95d0e8750 [2021-12-17 04:40:27,913 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 04:40:27,914 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label40.c [2021-12-17 04:40:27,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c92fab01/ada51c2935a4481f9dca575167ad8eea/FLAG95d0e8750 [2021-12-17 04:40:28,087 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c92fab01/ada51c2935a4481f9dca575167ad8eea [2021-12-17 04:40:28,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 04:40:28,090 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 04:40:28,104 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 04:40:28,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 04:40:28,106 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 04:40:28,107 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:40:28" (1/1) ... [2021-12-17 04:40:28,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@135051a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:28, skipping insertion in model container [2021-12-17 04:40:28,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 04:40:28" (1/1) ... [2021-12-17 04:40:28,115 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 04:40:28,216 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 04:40:28,396 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label40.c[4201,4214] [2021-12-17 04:40:29,083 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:40:29,089 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 04:40:29,113 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label40.c[4201,4214] [2021-12-17 04:40:29,481 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 04:40:29,499 INFO L208 MainTranslator]: Completed translation [2021-12-17 04:40:29,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:29 WrapperNode [2021-12-17 04:40:29,499 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 04:40:29,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 04:40:29,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 04:40:29,501 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 04:40:29,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:29" (1/1) ... [2021-12-17 04:40:29,570 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:29" (1/1) ... [2021-12-17 04:40:30,102 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-17 04:40:30,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 04:40:30,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 04:40:30,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 04:40:30,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 04:40:30,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:29" (1/1) ... [2021-12-17 04:40:30,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:29" (1/1) ... [2021-12-17 04:40:30,250 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:29" (1/1) ... [2021-12-17 04:40:30,250 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:29" (1/1) ... [2021-12-17 04:40:30,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:29" (1/1) ... [2021-12-17 04:40:30,531 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:29" (1/1) ... [2021-12-17 04:40:30,639 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:29" (1/1) ... [2021-12-17 04:40:30,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 04:40:30,791 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 04:40:30,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 04:40:30,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 04:40:30,793 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:29" (1/1) ... [2021-12-17 04:40:30,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 04:40:30,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:40:30,834 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) [2021-12-17 04:40:30,836 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 [2021-12-17 04:40:30,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 04:40:30,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 04:40:30,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 04:40:30,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 04:40:30,916 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 04:40:30,917 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 04:40:34,222 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 04:40:34,257 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 04:40:34,257 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-17 04:40:34,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:40:34 BoogieIcfgContainer [2021-12-17 04:40:34,260 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 04:40:34,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 04:40:34,262 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 04:40:34,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 04:40:34,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 04:40:28" (1/3) ... [2021-12-17 04:40:34,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30fa27c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:40:34, skipping insertion in model container [2021-12-17 04:40:34,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 04:40:29" (2/3) ... [2021-12-17 04:40:34,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30fa27c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 04:40:34, skipping insertion in model container [2021-12-17 04:40:34,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 04:40:34" (3/3) ... [2021-12-17 04:40:34,269 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label40.c [2021-12-17 04:40:34,272 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 04:40:34,273 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 04:40:34,311 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 04:40:34,316 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 [2021-12-17 04:40:34,316 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 04:40:34,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:34,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-17 04:40:34,341 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:34,342 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:40:34,342 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:34,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:34,346 INFO L85 PathProgramCache]: Analyzing trace with hash -716875070, now seen corresponding path program 1 times [2021-12-17 04:40:34,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:34,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526727039] [2021-12-17 04:40:34,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:34,353 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:34,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:40:34,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:34,587 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526727039] [2021-12-17 04:40:34,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526727039] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:34,587 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:34,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:40:34,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048183208] [2021-12-17 04:40:34,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:34,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:34,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:34,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:34,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:34,637 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:38,010 INFO L93 Difference]: Finished difference Result 3147 states and 5806 transitions. [2021-12-17 04:40:38,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:38,012 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 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 28 [2021-12-17 04:40:38,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:38,032 INFO L225 Difference]: With dead ends: 3147 [2021-12-17 04:40:38,032 INFO L226 Difference]: Without dead ends: 1964 [2021-12-17 04:40:38,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:38,041 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 1151 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 2714 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1151 SdHoareTripleChecker+Valid, 992 SdHoareTripleChecker+Invalid, 3298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 2714 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:38,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1151 Valid, 992 Invalid, 3298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 2714 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 04:40:38,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1964 states. [2021-12-17 04:40:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1964 to 1951. [2021-12-17 04:40:38,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1951 states, 1950 states have (on average 1.6538461538461537) internal successors, (3225), 1950 states have internal predecessors, (3225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:38,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1951 states to 1951 states and 3225 transitions. [2021-12-17 04:40:38,138 INFO L78 Accepts]: Start accepts. Automaton has 1951 states and 3225 transitions. Word has length 28 [2021-12-17 04:40:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:38,139 INFO L470 AbstractCegarLoop]: Abstraction has 1951 states and 3225 transitions. [2021-12-17 04:40:38,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 2 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 1951 states and 3225 transitions. [2021-12-17 04:40:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-12-17 04:40:38,198 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:38,199 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:40:38,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 04:40:38,199 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:38,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:38,202 INFO L85 PathProgramCache]: Analyzing trace with hash 215513083, now seen corresponding path program 1 times [2021-12-17 04:40:38,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:38,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625734509] [2021-12-17 04:40:38,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:38,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:38,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:38,297 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:40:38,298 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:38,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625734509] [2021-12-17 04:40:38,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625734509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:38,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:38,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:40:38,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27304898] [2021-12-17 04:40:38,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:38,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:38,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:38,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:38,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:38,301 INFO L87 Difference]: Start difference. First operand 1951 states and 3225 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:41,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:41,415 INFO L93 Difference]: Finished difference Result 5542 states and 9222 transitions. [2021-12-17 04:40:41,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:41,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 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 99 [2021-12-17 04:40:41,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:41,428 INFO L225 Difference]: With dead ends: 5542 [2021-12-17 04:40:41,428 INFO L226 Difference]: Without dead ends: 3593 [2021-12-17 04:40:41,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:41,437 INFO L933 BasicCegarLoop]: 872 mSDtfsCounter, 924 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2592 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 924 SdHoareTripleChecker+Valid, 1009 SdHoareTripleChecker+Invalid, 3341 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 2592 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:41,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [924 Valid, 1009 Invalid, 3341 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 2592 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:40:41,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2021-12-17 04:40:41,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 3581. [2021-12-17 04:40:41,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3581 states, 3580 states have (on average 1.5050279329608938) internal successors, (5388), 3580 states have internal predecessors, (5388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3581 states to 3581 states and 5388 transitions. [2021-12-17 04:40:41,494 INFO L78 Accepts]: Start accepts. Automaton has 3581 states and 5388 transitions. Word has length 99 [2021-12-17 04:40:41,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:41,495 INFO L470 AbstractCegarLoop]: Abstraction has 3581 states and 5388 transitions. [2021-12-17 04:40:41,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 2 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 3581 states and 5388 transitions. [2021-12-17 04:40:41,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-17 04:40:41,499 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:41,499 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:40:41,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-17 04:40:41,499 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:41,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:41,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1129801848, now seen corresponding path program 1 times [2021-12-17 04:40:41,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:41,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989018085] [2021-12-17 04:40:41,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:41,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:41,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:41,630 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:40:41,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:41,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989018085] [2021-12-17 04:40:41,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989018085] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:41,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:41,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:40:41,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097012479] [2021-12-17 04:40:41,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:41,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:41,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:41,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:41,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:41,635 INFO L87 Difference]: Start difference. First operand 3581 states and 5388 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:44,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:44,955 INFO L93 Difference]: Finished difference Result 10352 states and 15625 transitions. [2021-12-17 04:40:44,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:44,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 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 113 [2021-12-17 04:40:44,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:44,975 INFO L225 Difference]: With dead ends: 10352 [2021-12-17 04:40:44,975 INFO L226 Difference]: Without dead ends: 6773 [2021-12-17 04:40:44,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:44,987 INFO L933 BasicCegarLoop]: 1021 mSDtfsCounter, 786 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 2491 mSolverCounterSat, 786 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 786 SdHoareTripleChecker+Valid, 1171 SdHoareTripleChecker+Invalid, 3277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 786 IncrementalHoareTripleChecker+Valid, 2491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:44,988 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [786 Valid, 1171 Invalid, 3277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [786 Valid, 2491 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-17 04:40:44,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6773 states. [2021-12-17 04:40:45,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6773 to 6749. [2021-12-17 04:40:45,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6749 states, 6748 states have (on average 1.3255779490219324) internal successors, (8945), 6748 states have internal predecessors, (8945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:45,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6749 states to 6749 states and 8945 transitions. [2021-12-17 04:40:45,104 INFO L78 Accepts]: Start accepts. Automaton has 6749 states and 8945 transitions. Word has length 113 [2021-12-17 04:40:45,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:45,105 INFO L470 AbstractCegarLoop]: Abstraction has 6749 states and 8945 transitions. [2021-12-17 04:40:45,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:45,105 INFO L276 IsEmpty]: Start isEmpty. Operand 6749 states and 8945 transitions. [2021-12-17 04:40:45,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-17 04:40:45,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:45,111 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:40:45,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-17 04:40:45,111 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:45,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:45,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1928986802, now seen corresponding path program 1 times [2021-12-17 04:40:45,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:45,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653945649] [2021-12-17 04:40:45,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:45,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:45,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:45,241 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:40:45,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:45,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653945649] [2021-12-17 04:40:45,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653945649] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:45,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:45,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:40:45,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605938126] [2021-12-17 04:40:45,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:45,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:45,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:45,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:45,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:45,243 INFO L87 Difference]: Start difference. First operand 6749 states and 8945 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:48,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:48,484 INFO L93 Difference]: Finished difference Result 19873 states and 26326 transitions. [2021-12-17 04:40:48,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:48,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-12-17 04:40:48,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:48,532 INFO L225 Difference]: With dead ends: 19873 [2021-12-17 04:40:48,532 INFO L226 Difference]: Without dead ends: 13126 [2021-12-17 04:40:48,542 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:48,547 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 901 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 2878 mSolverCounterSat, 554 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 901 SdHoareTripleChecker+Valid, 610 SdHoareTripleChecker+Invalid, 3432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 554 IncrementalHoareTripleChecker+Valid, 2878 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:48,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [901 Valid, 610 Invalid, 3432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [554 Valid, 2878 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-12-17 04:40:48,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13126 states. [2021-12-17 04:40:48,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13126 to 13114. [2021-12-17 04:40:48,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13114 states, 13113 states have (on average 1.2759856630824373) internal successors, (16732), 13113 states have internal predecessors, (16732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13114 states to 13114 states and 16732 transitions. [2021-12-17 04:40:48,842 INFO L78 Accepts]: Start accepts. Automaton has 13114 states and 16732 transitions. Word has length 142 [2021-12-17 04:40:48,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:48,843 INFO L470 AbstractCegarLoop]: Abstraction has 13114 states and 16732 transitions. [2021-12-17 04:40:48,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 13114 states and 16732 transitions. [2021-12-17 04:40:48,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-12-17 04:40:48,846 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:48,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:40:48,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 04:40:48,846 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:48,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:48,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1888751763, now seen corresponding path program 1 times [2021-12-17 04:40:48,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:48,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337187388] [2021-12-17 04:40:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:48,848 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:48,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:40:48,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:48,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337187388] [2021-12-17 04:40:48,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337187388] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:48,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:48,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:40:48,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401294293] [2021-12-17 04:40:48,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:48,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:40:48,964 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:48,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:40:48,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:40:48,965 INFO L87 Difference]: Start difference. First operand 13114 states and 16732 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:55,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:55,520 INFO L93 Difference]: Finished difference Result 45404 states and 59058 transitions. [2021-12-17 04:40:55,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:40:55,520 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 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 153 [2021-12-17 04:40:55,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:55,584 INFO L225 Difference]: With dead ends: 45404 [2021-12-17 04:40:55,584 INFO L226 Difference]: Without dead ends: 33079 [2021-12-17 04:40:55,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:40:55,605 INFO L933 BasicCegarLoop]: 942 mSDtfsCounter, 1654 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 7427 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1654 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 8047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 7427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:55,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1654 Valid, 1233 Invalid, 8047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [620 Valid, 7427 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2021-12-17 04:40:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33079 states. [2021-12-17 04:40:56,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33079 to 32857. [2021-12-17 04:40:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32857 states, 32856 states have (on average 1.232499391283175) internal successors, (40495), 32856 states have internal predecessors, (40495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:56,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32857 states to 32857 states and 40495 transitions. [2021-12-17 04:40:56,148 INFO L78 Accepts]: Start accepts. Automaton has 32857 states and 40495 transitions. Word has length 153 [2021-12-17 04:40:56,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:56,149 INFO L470 AbstractCegarLoop]: Abstraction has 32857 states and 40495 transitions. [2021-12-17 04:40:56,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:56,150 INFO L276 IsEmpty]: Start isEmpty. Operand 32857 states and 40495 transitions. [2021-12-17 04:40:56,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-12-17 04:40:56,152 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:56,152 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:40:56,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-17 04:40:56,152 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:56,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash 245627492, now seen corresponding path program 1 times [2021-12-17 04:40:56,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:56,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072820830] [2021-12-17 04:40:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:56,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:56,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:56,240 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 113 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 04:40:56,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:56,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072820830] [2021-12-17 04:40:56,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072820830] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:56,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:56,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:40:56,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460419673] [2021-12-17 04:40:56,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:56,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:40:56,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:56,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:40:56,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:56,242 INFO L87 Difference]: Start difference. First operand 32857 states and 40495 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:59,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:40:59,034 INFO L93 Difference]: Finished difference Result 64925 states and 80181 transitions. [2021-12-17 04:40:59,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:40:59,035 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 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 218 [2021-12-17 04:40:59,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:40:59,077 INFO L225 Difference]: With dead ends: 64925 [2021-12-17 04:40:59,077 INFO L226 Difference]: Without dead ends: 32857 [2021-12-17 04:40:59,107 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:40:59,108 INFO L933 BasicCegarLoop]: 1084 mSDtfsCounter, 700 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2531 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 1213 SdHoareTripleChecker+Invalid, 2540 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 2531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:40:59,108 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [700 Valid, 1213 Invalid, 2540 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 2531 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:40:59,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32857 states. [2021-12-17 04:40:59,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32857 to 32857. [2021-12-17 04:40:59,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32857 states, 32856 states have (on average 1.2321950328707085) internal successors, (40485), 32856 states have internal predecessors, (40485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:59,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32857 states to 32857 states and 40485 transitions. [2021-12-17 04:40:59,433 INFO L78 Accepts]: Start accepts. Automaton has 32857 states and 40485 transitions. Word has length 218 [2021-12-17 04:40:59,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:40:59,434 INFO L470 AbstractCegarLoop]: Abstraction has 32857 states and 40485 transitions. [2021-12-17 04:40:59,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 2 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:40:59,434 INFO L276 IsEmpty]: Start isEmpty. Operand 32857 states and 40485 transitions. [2021-12-17 04:40:59,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-12-17 04:40:59,441 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:40:59,441 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:40:59,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-17 04:40:59,442 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:40:59,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:40:59,443 INFO L85 PathProgramCache]: Analyzing trace with hash 518295855, now seen corresponding path program 1 times [2021-12-17 04:40:59,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:40:59,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429642638] [2021-12-17 04:40:59,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:40:59,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:40:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:40:59,534 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:40:59,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:40:59,535 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429642638] [2021-12-17 04:40:59,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [429642638] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:40:59,535 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:40:59,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:40:59,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800860617] [2021-12-17 04:40:59,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:40:59,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:40:59,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:40:59,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:40:59,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:40:59,537 INFO L87 Difference]: Start difference. First operand 32857 states and 40485 transitions. Second operand has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:05,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:05,885 INFO L93 Difference]: Finished difference Result 88879 states and 111172 transitions. [2021-12-17 04:41:05,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:41:05,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 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 225 [2021-12-17 04:41:05,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:06,045 INFO L225 Difference]: With dead ends: 88879 [2021-12-17 04:41:06,046 INFO L226 Difference]: Without dead ends: 56811 [2021-12-17 04:41:06,080 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:06,081 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 1723 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 6961 mSolverCounterSat, 1071 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1723 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 8032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1071 IncrementalHoareTripleChecker+Valid, 6961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:06,082 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1723 Valid, 1015 Invalid, 8032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1071 Valid, 6961 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2021-12-17 04:41:06,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56811 states. [2021-12-17 04:41:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56811 to 56623. [2021-12-17 04:41:06,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56623 states, 56622 states have (on average 1.2245416975733814) internal successors, (69336), 56622 states have internal predecessors, (69336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:06,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56623 states to 56623 states and 69336 transitions. [2021-12-17 04:41:06,863 INFO L78 Accepts]: Start accepts. Automaton has 56623 states and 69336 transitions. Word has length 225 [2021-12-17 04:41:06,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:06,864 INFO L470 AbstractCegarLoop]: Abstraction has 56623 states and 69336 transitions. [2021-12-17 04:41:06,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 56.25) internal successors, (225), 3 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:06,864 INFO L276 IsEmpty]: Start isEmpty. Operand 56623 states and 69336 transitions. [2021-12-17 04:41:06,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2021-12-17 04:41:06,866 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:06,867 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:06,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-17 04:41:06,867 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:06,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:06,868 INFO L85 PathProgramCache]: Analyzing trace with hash -1054166602, now seen corresponding path program 1 times [2021-12-17 04:41:06,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:06,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329632313] [2021-12-17 04:41:06,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:06,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:06,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 146 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:41:06,953 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:06,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329632313] [2021-12-17 04:41:06,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329632313] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:06,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:06,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:06,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83348267] [2021-12-17 04:41:06,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:06,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:06,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:06,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:06,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:06,956 INFO L87 Difference]: Start difference. First operand 56623 states and 69336 transitions. Second operand has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:10,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:10,455 INFO L93 Difference]: Finished difference Result 137657 states and 172287 transitions. [2021-12-17 04:41:10,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:10,455 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 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 235 [2021-12-17 04:41:10,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:10,822 INFO L225 Difference]: With dead ends: 137657 [2021-12-17 04:41:10,822 INFO L226 Difference]: Without dead ends: 81823 [2021-12-17 04:41:10,845 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 [2021-12-17 04:41:10,846 INFO L933 BasicCegarLoop]: 941 mSDtfsCounter, 825 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 888 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 3325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 888 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:10,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 1062 Invalid, 3325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [888 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:41:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81823 states. [2021-12-17 04:41:11,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81823 to 81808. [2021-12-17 04:41:11,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81808 states, 81807 states have (on average 1.206155952424609) internal successors, (98672), 81807 states have internal predecessors, (98672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:11,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81808 states to 81808 states and 98672 transitions. [2021-12-17 04:41:11,690 INFO L78 Accepts]: Start accepts. Automaton has 81808 states and 98672 transitions. Word has length 235 [2021-12-17 04:41:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:11,690 INFO L470 AbstractCegarLoop]: Abstraction has 81808 states and 98672 transitions. [2021-12-17 04:41:11,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 78.33333333333333) internal successors, (235), 3 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 81808 states and 98672 transitions. [2021-12-17 04:41:11,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-12-17 04:41:11,693 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:11,693 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:11,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-17 04:41:11,695 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:11,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:11,696 INFO L85 PathProgramCache]: Analyzing trace with hash 945283299, now seen corresponding path program 1 times [2021-12-17 04:41:11,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:11,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879884982] [2021-12-17 04:41:11,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:11,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:11,768 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 04:41:11,768 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:11,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879884982] [2021-12-17 04:41:11,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879884982] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:11,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:11,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:11,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893823070] [2021-12-17 04:41:11,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:11,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:11,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:11,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:11,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:11,771 INFO L87 Difference]: Start difference. First operand 81808 states and 98672 transitions. Second operand has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:14,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:14,978 INFO L93 Difference]: Finished difference Result 161019 states and 194543 transitions. [2021-12-17 04:41:14,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:14,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 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 242 [2021-12-17 04:41:14,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:15,101 INFO L225 Difference]: With dead ends: 161019 [2021-12-17 04:41:15,102 INFO L226 Difference]: Without dead ends: 80000 [2021-12-17 04:41:15,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:15,135 INFO L933 BasicCegarLoop]: 1519 mSDtfsCounter, 1038 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 596 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1038 SdHoareTripleChecker+Valid, 1662 SdHoareTripleChecker+Invalid, 2950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 596 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:15,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1038 Valid, 1662 Invalid, 2950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [596 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:41:15,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80000 states. [2021-12-17 04:41:16,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80000 to 79991. [2021-12-17 04:41:16,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79991 states, 79990 states have (on average 1.1415301912739093) internal successors, (91311), 79990 states have internal predecessors, (91311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:16,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79991 states to 79991 states and 91311 transitions. [2021-12-17 04:41:16,189 INFO L78 Accepts]: Start accepts. Automaton has 79991 states and 91311 transitions. Word has length 242 [2021-12-17 04:41:16,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:16,190 INFO L470 AbstractCegarLoop]: Abstraction has 79991 states and 91311 transitions. [2021-12-17 04:41:16,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.66666666666667) internal successors, (242), 3 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:16,190 INFO L276 IsEmpty]: Start isEmpty. Operand 79991 states and 91311 transitions. [2021-12-17 04:41:16,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-12-17 04:41:16,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:16,191 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:16,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-17 04:41:16,192 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:16,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1728912165, now seen corresponding path program 1 times [2021-12-17 04:41:16,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:16,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531393556] [2021-12-17 04:41:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:16,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:16,273 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 51 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-17 04:41:16,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:16,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531393556] [2021-12-17 04:41:16,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531393556] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:16,274 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:16,274 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 04:41:16,274 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010656982] [2021-12-17 04:41:16,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:16,275 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:16,275 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:16,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:16,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:16,275 INFO L87 Difference]: Start difference. First operand 79991 states and 91311 transitions. Second operand has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:19,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:19,872 INFO L93 Difference]: Finished difference Result 211905 states and 243536 transitions. [2021-12-17 04:41:19,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:19,872 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 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 258 [2021-12-17 04:41:19,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:20,069 INFO L225 Difference]: With dead ends: 211905 [2021-12-17 04:41:20,069 INFO L226 Difference]: Without dead ends: 132703 [2021-12-17 04:41:20,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:20,126 INFO L933 BasicCegarLoop]: 915 mSDtfsCounter, 814 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 863 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 814 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 3223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 863 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:20,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [814 Valid, 1051 Invalid, 3223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [863 Valid, 2360 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-17 04:41:20,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132703 states. [2021-12-17 04:41:21,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132703 to 124820. [2021-12-17 04:41:21,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124820 states, 124819 states have (on average 1.1132439772791) internal successors, (138954), 124819 states have internal predecessors, (138954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:21,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124820 states to 124820 states and 138954 transitions. [2021-12-17 04:41:21,792 INFO L78 Accepts]: Start accepts. Automaton has 124820 states and 138954 transitions. Word has length 258 [2021-12-17 04:41:21,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:21,793 INFO L470 AbstractCegarLoop]: Abstraction has 124820 states and 138954 transitions. [2021-12-17 04:41:21,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.666666666666664) internal successors, (155), 2 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:21,793 INFO L276 IsEmpty]: Start isEmpty. Operand 124820 states and 138954 transitions. [2021-12-17 04:41:21,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2021-12-17 04:41:21,796 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:21,797 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:21,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-17 04:41:21,797 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:21,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1755959963, now seen corresponding path program 1 times [2021-12-17 04:41:21,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:21,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802952998] [2021-12-17 04:41:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:21,799 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-17 04:41:22,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:22,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802952998] [2021-12-17 04:41:22,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802952998] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:22,133 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:22,133 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:22,133 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017591576] [2021-12-17 04:41:22,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:22,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:22,134 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:22,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:22,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:22,135 INFO L87 Difference]: Start difference. First operand 124820 states and 138954 transitions. Second operand has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:25,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:25,477 INFO L93 Difference]: Finished difference Result 251216 states and 279500 transitions. [2021-12-17 04:41:25,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:25,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 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 314 [2021-12-17 04:41:25,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:25,635 INFO L225 Difference]: With dead ends: 251216 [2021-12-17 04:41:25,636 INFO L226 Difference]: Without dead ends: 127185 [2021-12-17 04:41:25,669 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 [2021-12-17 04:41:25,670 INFO L933 BasicCegarLoop]: 1391 mSDtfsCounter, 939 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2487 mSolverCounterSat, 606 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 939 SdHoareTripleChecker+Valid, 1477 SdHoareTripleChecker+Invalid, 3093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 606 IncrementalHoareTripleChecker+Valid, 2487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:25,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [939 Valid, 1477 Invalid, 3093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [606 Valid, 2487 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2021-12-17 04:41:25,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127185 states. [2021-12-17 04:41:26,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127185 to 124813. [2021-12-17 04:41:27,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124813 states, 124812 states have (on average 1.0930439380828767) internal successors, (136425), 124812 states have internal predecessors, (136425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124813 states to 124813 states and 136425 transitions. [2021-12-17 04:41:27,392 INFO L78 Accepts]: Start accepts. Automaton has 124813 states and 136425 transitions. Word has length 314 [2021-12-17 04:41:27,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:27,393 INFO L470 AbstractCegarLoop]: Abstraction has 124813 states and 136425 transitions. [2021-12-17 04:41:27,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:27,393 INFO L276 IsEmpty]: Start isEmpty. Operand 124813 states and 136425 transitions. [2021-12-17 04:41:27,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-12-17 04:41:27,395 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:27,396 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:27,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-17 04:41:27,396 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:27,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:27,396 INFO L85 PathProgramCache]: Analyzing trace with hash -444136852, now seen corresponding path program 1 times [2021-12-17 04:41:27,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:27,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019333000] [2021-12-17 04:41:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:27,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:27,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:27,479 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 261 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-12-17 04:41:27,479 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:27,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019333000] [2021-12-17 04:41:27,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019333000] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:27,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:27,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:27,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517777813] [2021-12-17 04:41:27,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:27,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:27,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:27,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:27,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:27,481 INFO L87 Difference]: Start difference. First operand 124813 states and 136425 transitions. Second operand has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:31,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:31,042 INFO L93 Difference]: Finished difference Result 282686 states and 310306 transitions. [2021-12-17 04:41:31,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:31,043 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2021-12-17 04:41:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:31,243 INFO L225 Difference]: With dead ends: 282686 [2021-12-17 04:41:31,243 INFO L226 Difference]: Without dead ends: 158662 [2021-12-17 04:41:31,290 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 [2021-12-17 04:41:31,291 INFO L933 BasicCegarLoop]: 764 mSDtfsCounter, 894 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2402 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 894 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 3176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 2402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:31,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [894 Valid, 845 Invalid, 3176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [774 Valid, 2402 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-17 04:41:31,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158662 states. [2021-12-17 04:41:32,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158662 to 157068. [2021-12-17 04:41:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157068 states, 157067 states have (on average 1.0880515958157984) internal successors, (170897), 157067 states have internal predecessors, (170897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:33,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157068 states to 157068 states and 170897 transitions. [2021-12-17 04:41:33,132 INFO L78 Accepts]: Start accepts. Automaton has 157068 states and 170897 transitions. Word has length 324 [2021-12-17 04:41:33,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:33,133 INFO L470 AbstractCegarLoop]: Abstraction has 157068 states and 170897 transitions. [2021-12-17 04:41:33,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 79.0) internal successors, (237), 3 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:33,133 INFO L276 IsEmpty]: Start isEmpty. Operand 157068 states and 170897 transitions. [2021-12-17 04:41:33,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2021-12-17 04:41:33,136 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:33,136 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:33,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-17 04:41:33,136 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:33,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:33,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1192441845, now seen corresponding path program 1 times [2021-12-17 04:41:33,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:33,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142882933] [2021-12-17 04:41:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:33,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:33,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:33,491 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 342 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 04:41:33,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:33,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142882933] [2021-12-17 04:41:33,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142882933] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:33,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:33,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:33,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050655781] [2021-12-17 04:41:33,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:33,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:33,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:33,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:33,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-17 04:41:33,493 INFO L87 Difference]: Start difference. First operand 157068 states and 170897 transitions. Second operand has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:36,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:36,765 INFO L93 Difference]: Finished difference Result 315742 states and 343409 transitions. [2021-12-17 04:41:36,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:36,766 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 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 341 [2021-12-17 04:41:36,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:36,949 INFO L225 Difference]: With dead ends: 315742 [2021-12-17 04:41:36,949 INFO L226 Difference]: Without dead ends: 156310 [2021-12-17 04:41:37,019 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 [2021-12-17 04:41:37,022 INFO L933 BasicCegarLoop]: 1746 mSDtfsCounter, 770 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 1884 SdHoareTripleChecker+Invalid, 2806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:37,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [770 Valid, 1884 Invalid, 2806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-12-17 04:41:37,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156310 states. [2021-12-17 04:41:38,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156310 to 152334. [2021-12-17 04:41:38,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152334 states, 152333 states have (on average 1.0791883570861205) internal successors, (164396), 152333 states have internal predecessors, (164396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:38,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152334 states to 152334 states and 164396 transitions. [2021-12-17 04:41:38,875 INFO L78 Accepts]: Start accepts. Automaton has 152334 states and 164396 transitions. Word has length 341 [2021-12-17 04:41:38,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:38,876 INFO L470 AbstractCegarLoop]: Abstraction has 152334 states and 164396 transitions. [2021-12-17 04:41:38,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.33333333333333) internal successors, (316), 3 states have internal predecessors, (316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:38,876 INFO L276 IsEmpty]: Start isEmpty. Operand 152334 states and 164396 transitions. [2021-12-17 04:41:38,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2021-12-17 04:41:38,886 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:38,887 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:38,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-17 04:41:38,888 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:38,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:38,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1539895112, now seen corresponding path program 1 times [2021-12-17 04:41:38,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:38,888 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059788921] [2021-12-17 04:41:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:38,889 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:39,072 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-17 04:41:39,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:39,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059788921] [2021-12-17 04:41:39,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059788921] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:39,073 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:39,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-17 04:41:39,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701166774] [2021-12-17 04:41:39,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:39,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:41:39,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:39,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:41:39,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:39,076 INFO L87 Difference]: Start difference. First operand 152334 states and 164396 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:44,695 INFO L93 Difference]: Finished difference Result 329921 states and 357854 transitions. [2021-12-17 04:41:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:41:44,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 355 [2021-12-17 04:41:44,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:44,954 INFO L225 Difference]: With dead ends: 329921 [2021-12-17 04:41:44,955 INFO L226 Difference]: Without dead ends: 194909 [2021-12-17 04:41:45,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:45,040 INFO L933 BasicCegarLoop]: 711 mSDtfsCounter, 1627 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 6115 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1627 SdHoareTripleChecker+Valid, 1034 SdHoareTripleChecker+Invalid, 6838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 6115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:45,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1627 Valid, 1034 Invalid, 6838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 6115 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2021-12-17 04:41:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194909 states. [2021-12-17 04:41:46,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194909 to 173604. [2021-12-17 04:41:47,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173604 states, 173603 states have (on average 1.0739157733449307) internal successors, (186435), 173603 states have internal predecessors, (186435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173604 states to 173604 states and 186435 transitions. [2021-12-17 04:41:47,192 INFO L78 Accepts]: Start accepts. Automaton has 173604 states and 186435 transitions. Word has length 355 [2021-12-17 04:41:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:47,193 INFO L470 AbstractCegarLoop]: Abstraction has 173604 states and 186435 transitions. [2021-12-17 04:41:47,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:47,193 INFO L276 IsEmpty]: Start isEmpty. Operand 173604 states and 186435 transitions. [2021-12-17 04:41:47,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 371 [2021-12-17 04:41:47,197 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:47,197 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:47,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-17 04:41:47,197 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:47,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:47,198 INFO L85 PathProgramCache]: Analyzing trace with hash 221236577, now seen corresponding path program 1 times [2021-12-17 04:41:47,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:47,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383398988] [2021-12-17 04:41:47,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:47,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:47,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:47,788 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 255 proven. 110 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-17 04:41:47,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:47,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383398988] [2021-12-17 04:41:47,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383398988] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 04:41:47,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578517894] [2021-12-17 04:41:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:47,789 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 04:41:47,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 04:41:47,804 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-17 04:41:47,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 04:41:47,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:47,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-17 04:41:47,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 04:41:48,514 INFO L134 CoverageAnalysis]: Checked inductivity of 391 backedges. 278 proven. 0 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2021-12-17 04:41:48,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-17 04:41:48,514 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578517894] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:48,514 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-17 04:41:48,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-12-17 04:41:48,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932233924] [2021-12-17 04:41:48,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:48,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-17 04:41:48,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:48,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-17 04:41:48,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:41:48,516 INFO L87 Difference]: Start difference. First operand 173604 states and 186435 transitions. Second operand has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:51,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:41:51,834 INFO L93 Difference]: Finished difference Result 344056 states and 369410 transitions. [2021-12-17 04:41:51,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-17 04:41:51,835 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 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 370 [2021-12-17 04:41:51,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:41:52,069 INFO L225 Difference]: With dead ends: 344056 [2021-12-17 04:41:52,070 INFO L226 Difference]: Without dead ends: 171241 [2021-12-17 04:41:52,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-17 04:41:52,170 INFO L933 BasicCegarLoop]: 1334 mSDtfsCounter, 1094 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 2447 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1094 SdHoareTripleChecker+Valid, 1412 SdHoareTripleChecker+Invalid, 2888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 2447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:41:52,170 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1094 Valid, 1412 Invalid, 2888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 2447 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-17 04:41:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171241 states. [2021-12-17 04:41:54,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171241 to 169661. [2021-12-17 04:41:54,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169661 states, 169660 states have (on average 1.056029706471767) internal successors, (179166), 169660 states have internal predecessors, (179166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:54,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169661 states to 169661 states and 179166 transitions. [2021-12-17 04:41:54,331 INFO L78 Accepts]: Start accepts. Automaton has 169661 states and 179166 transitions. Word has length 370 [2021-12-17 04:41:54,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 04:41:54,331 INFO L470 AbstractCegarLoop]: Abstraction has 169661 states and 179166 transitions. [2021-12-17 04:41:54,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 86.0) internal successors, (258), 3 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:41:54,331 INFO L276 IsEmpty]: Start isEmpty. Operand 169661 states and 179166 transitions. [2021-12-17 04:41:54,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 384 [2021-12-17 04:41:54,334 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 04:41:54,334 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 04:41:54,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-17 04:41:54,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-17 04:41:54,542 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 04:41:54,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 04:41:54,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1276482095, now seen corresponding path program 1 times [2021-12-17 04:41:54,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 04:41:54,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937886875] [2021-12-17 04:41:54,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 04:41:54,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 04:41:54,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 04:41:54,646 INFO L134 CoverageAnalysis]: Checked inductivity of 593 backedges. 360 proven. 0 refuted. 0 times theorem prover too weak. 233 trivial. 0 not checked. [2021-12-17 04:41:54,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 04:41:54,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937886875] [2021-12-17 04:41:54,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937886875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 04:41:54,647 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 04:41:54,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-17 04:41:54,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418124395] [2021-12-17 04:41:54,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 04:41:54,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-17 04:41:54,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 04:41:54,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-17 04:41:54,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:41:54,648 INFO L87 Difference]: Start difference. First operand 169661 states and 179166 transitions. Second operand has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-17 04:42:00,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 04:42:00,535 INFO L93 Difference]: Finished difference Result 411079 states and 435852 transitions. [2021-12-17 04:42:00,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-17 04:42:00,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 56.0) internal successors, (224), 4 states have internal predecessors, (224), 0 states have call successors, (0), 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 383 [2021-12-17 04:42:00,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 04:42:00,913 INFO L225 Difference]: With dead ends: 411079 [2021-12-17 04:42:00,913 INFO L226 Difference]: Without dead ends: 256374 [2021-12-17 04:42:00,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-17 04:42:00,999 INFO L933 BasicCegarLoop]: 552 mSDtfsCounter, 1921 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 5213 mSolverCounterSat, 1238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1921 SdHoareTripleChecker+Valid, 817 SdHoareTripleChecker+Invalid, 6451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1238 IncrementalHoareTripleChecker+Valid, 5213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2021-12-17 04:42:00,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1921 Valid, 817 Invalid, 6451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1238 Valid, 5213 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2021-12-17 04:42:01,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256374 states. [2021-12-17 04:42:03,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256374 to 246907. [2021-12-17 04:42:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246907 states, 246906 states have (on average 1.0545997262115947) internal successors, (260387), 246906 states have internal predecessors, (260387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)