./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/eca-rers2012/Problem13_label50.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e19ca921 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/eca-rers2012/Problem13_label50.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 c0a29c0650858169a7f06788e2d55d3441e7b25ce879ddd70ee1db162c004af4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 09:23:27,959 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 09:23:27,960 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 09:23:27,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 09:23:27,994 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 09:23:27,995 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 09:23:27,996 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 09:23:27,997 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 09:23:27,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 09:23:27,999 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 09:23:28,000 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 09:23:28,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 09:23:28,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 09:23:28,001 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 09:23:28,002 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 09:23:28,003 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 09:23:28,004 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 09:23:28,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 09:23:28,005 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 09:23:28,006 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 09:23:28,014 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 09:23:28,015 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 09:23:28,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 09:23:28,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 09:23:28,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 09:23:28,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 09:23:28,018 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 09:23:28,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 09:23:28,019 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 09:23:28,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 09:23:28,020 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 09:23:28,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 09:23:28,021 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 09:23:28,022 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 09:23:28,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 09:23:28,023 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 09:23:28,023 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 09:23:28,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 09:23:28,024 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 09:23:28,025 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 09:23:28,025 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 09:23:28,026 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 09:23:28,041 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 09:23:28,046 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 09:23:28,048 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 09:23:28,048 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 09:23:28,048 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 09:23:28,049 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 09:23:28,049 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 09:23:28,049 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 09:23:28,049 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 09:23:28,050 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 09:23:28,050 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 09:23:28,050 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 09:23:28,051 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 09:23:28,051 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 09:23:28,051 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 09:23:28,051 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 09:23:28,051 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 09:23:28,051 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 09:23:28,051 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 09:23:28,051 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 09:23:28,052 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 09:23:28,052 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 09:23:28,052 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 09:23:28,052 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 09:23:28,052 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:23:28,052 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 09:23:28,053 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 09:23:28,053 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 09:23:28,053 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 09:23:28,053 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 09:23:28,053 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 09:23:28,053 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 09:23:28,054 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 09:23:28,054 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 09:23:28,054 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0a29c0650858169a7f06788e2d55d3441e7b25ce879ddd70ee1db162c004af4 [2021-12-22 09:23:28,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 09:23:28,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 09:23:28,272 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 09:23:28,272 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 09:23:28,273 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 09:23:28,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2021-12-22 09:23:28,321 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a46582ee/4b0cb7d89cc94577a440b7efbc527207/FLAGf0b698603 [2021-12-22 09:23:28,909 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 09:23:28,909 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/eca-rers2012/Problem13_label50.c [2021-12-22 09:23:28,941 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a46582ee/4b0cb7d89cc94577a440b7efbc527207/FLAGf0b698603 [2021-12-22 09:23:29,092 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5a46582ee/4b0cb7d89cc94577a440b7efbc527207 [2021-12-22 09:23:29,095 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 09:23:29,097 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 09:23:29,099 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 09:23:29,099 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 09:23:29,101 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 09:23:29,102 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:23:29" (1/1) ... [2021-12-22 09:23:29,103 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10b29dd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:23:29, skipping insertion in model container [2021-12-22 09:23:29,103 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 09:23:29" (1/1) ... [2021-12-22 09:23:29,108 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 09:23:29,198 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 09:23:29,442 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_label50.c[8814,8827] [2021-12-22 09:23:29,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:23:29,980 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 09:23:30,005 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_label50.c[8814,8827] [2021-12-22 09:23:30,341 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 09:23:30,357 INFO L208 MainTranslator]: Completed translation [2021-12-22 09:23:30,357 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:23:30 WrapperNode [2021-12-22 09:23:30,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 09:23:30,358 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 09:23:30,359 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 09:23:30,359 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 09:23:30,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:23:30" (1/1) ... [2021-12-22 09:23:30,411 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:23:30" (1/1) ... [2021-12-22 09:23:30,888 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-12-22 09:23:30,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 09:23:30,890 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 09:23:30,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 09:23:30,895 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 09:23:30,907 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:23:30" (1/1) ... [2021-12-22 09:23:30,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:23:30" (1/1) ... [2021-12-22 09:23:31,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:23:30" (1/1) ... [2021-12-22 09:23:31,055 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:23:30" (1/1) ... [2021-12-22 09:23:31,196 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:23:30" (1/1) ... [2021-12-22 09:23:31,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:23:30" (1/1) ... [2021-12-22 09:23:31,275 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:23:30" (1/1) ... [2021-12-22 09:23:31,334 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 09:23:31,335 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 09:23:31,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 09:23:31,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 09:23:31,337 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:23:30" (1/1) ... [2021-12-22 09:23:31,342 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 09:23:31,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:23:31,383 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-22 09:23:31,401 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-22 09:23:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 09:23:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 09:23:31,411 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 09:23:31,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 09:23:31,596 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 09:23:31,597 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 09:23:35,046 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 09:23:35,056 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 09:23:35,057 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-22 09:23:35,059 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:23:35 BoogieIcfgContainer [2021-12-22 09:23:35,059 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 09:23:35,060 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 09:23:35,060 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 09:23:35,062 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 09:23:35,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 09:23:29" (1/3) ... [2021-12-22 09:23:35,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60297449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:23:35, skipping insertion in model container [2021-12-22 09:23:35,063 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 09:23:30" (2/3) ... [2021-12-22 09:23:35,063 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@60297449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 09:23:35, skipping insertion in model container [2021-12-22 09:23:35,064 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 09:23:35" (3/3) ... [2021-12-22 09:23:35,064 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label50.c [2021-12-22 09:23:35,068 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 09:23:35,068 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-22 09:23:35,099 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 09:23:35,103 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-22 09:23:35,104 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-22 09:23:35,124 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) [2021-12-22 09:23:35,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-12-22 09:23:35,130 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:35,131 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:35,131 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:35,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash 531730986, now seen corresponding path program 1 times [2021-12-22 09:23:35,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:35,141 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178958737] [2021-12-22 09:23:35,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:35,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:23:35,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:35,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178958737] [2021-12-22 09:23:35,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1178958737] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:35,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:35,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:23:35,406 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124401713] [2021-12-22 09:23:35,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:35,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:23:35,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:35,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:23:35,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:23:35,435 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 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:41,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:41,049 INFO L93 Difference]: Finished difference Result 3829 states and 7206 transitions. [2021-12-22 09:23:41,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:23:41,051 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 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 62 [2021-12-22 09:23:41,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:41,068 INFO L225 Difference]: With dead ends: 3829 [2021-12-22 09:23:41,069 INFO L226 Difference]: Without dead ends: 2664 [2021-12-22 09:23:41,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-22 09:23:41,076 INFO L933 BasicCegarLoop]: 761 mSDtfsCounter, 2666 mSDsluCounter, 306 mSDsCounter, 0 mSdLazyCounter, 4246 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2666 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 5856 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 4246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:41,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2666 Valid, 1067 Invalid, 5856 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 4246 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-22 09:23:41,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-12-22 09:23:41,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2663. [2021-12-22 09:23:41,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2663 states, 2662 states have (on average 1.460931630353118) internal successors, (3889), 2662 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:41,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2663 states to 2663 states and 3889 transitions. [2021-12-22 09:23:41,170 INFO L78 Accepts]: Start accepts. Automaton has 2663 states and 3889 transitions. Word has length 62 [2021-12-22 09:23:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:41,171 INFO L470 AbstractCegarLoop]: Abstraction has 2663 states and 3889 transitions. [2021-12-22 09:23:41,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 2663 states and 3889 transitions. [2021-12-22 09:23:41,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-12-22 09:23:41,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:41,187 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-12-22 09:23:41,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 09:23:41,188 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:41,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:41,189 INFO L85 PathProgramCache]: Analyzing trace with hash 354009653, now seen corresponding path program 1 times [2021-12-22 09:23:41,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:41,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853398607] [2021-12-22 09:23:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:41,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:41,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:41,329 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:23:41,330 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:41,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853398607] [2021-12-22 09:23:41,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853398607] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:41,330 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:41,330 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:23:41,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886229111] [2021-12-22 09:23:41,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:41,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:23:41,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:41,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:23:41,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:23:41,333 INFO L87 Difference]: Start difference. First operand 2663 states and 3889 transitions. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:46,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:46,980 INFO L93 Difference]: Finished difference Result 7864 states and 12669 transitions. [2021-12-22 09:23:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:23:46,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 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 187 [2021-12-22 09:23:46,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:47,000 INFO L225 Difference]: With dead ends: 7864 [2021-12-22 09:23:47,000 INFO L226 Difference]: Without dead ends: 5990 [2021-12-22 09:23:47,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:23:47,005 INFO L933 BasicCegarLoop]: 894 mSDtfsCounter, 1617 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 6333 mSolverCounterSat, 831 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1617 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 7164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 831 IncrementalHoareTripleChecker+Valid, 6333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:47,006 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1617 Valid, 1191 Invalid, 7164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [831 Valid, 6333 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2021-12-22 09:23:47,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5990 states. [2021-12-22 09:23:47,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5990 to 5859. [2021-12-22 09:23:47,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5859 states, 5858 states have (on average 1.4452031410037556) internal successors, (8466), 5858 states have internal predecessors, (8466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:47,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5859 states to 5859 states and 8466 transitions. [2021-12-22 09:23:47,107 INFO L78 Accepts]: Start accepts. Automaton has 5859 states and 8466 transitions. Word has length 187 [2021-12-22 09:23:47,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:47,108 INFO L470 AbstractCegarLoop]: Abstraction has 5859 states and 8466 transitions. [2021-12-22 09:23:47,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 3 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:47,108 INFO L276 IsEmpty]: Start isEmpty. Operand 5859 states and 8466 transitions. [2021-12-22 09:23:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2021-12-22 09:23:47,111 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:47,111 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:47,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 09:23:47,111 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash 747152322, now seen corresponding path program 1 times [2021-12-22 09:23:47,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:47,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059762362] [2021-12-22 09:23:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:47,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:47,291 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-12-22 09:23:47,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:47,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059762362] [2021-12-22 09:23:47,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059762362] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:47,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:47,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:23:47,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385928051] [2021-12-22 09:23:47,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:47,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:47,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:47,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:47,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:47,297 INFO L87 Difference]: Start difference. First operand 5859 states and 8466 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:50,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:50,460 INFO L93 Difference]: Finished difference Result 15687 states and 23390 transitions. [2021-12-22 09:23:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:23:50,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 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 229 [2021-12-22 09:23:50,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:50,514 INFO L225 Difference]: With dead ends: 15687 [2021-12-22 09:23:50,514 INFO L226 Difference]: Without dead ends: 10617 [2021-12-22 09:23:50,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:50,532 INFO L933 BasicCegarLoop]: 785 mSDtfsCounter, 919 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 2554 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 919 SdHoareTripleChecker+Valid, 918 SdHoareTripleChecker+Invalid, 3310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 2554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:50,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [919 Valid, 918 Invalid, 3310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 2554 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-22 09:23:50,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10617 states. [2021-12-22 09:23:50,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10617 to 10608. [2021-12-22 09:23:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10608 states, 10607 states have (on average 1.3551428302064674) internal successors, (14374), 10607 states have internal predecessors, (14374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:50,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10608 states to 10608 states and 14374 transitions. [2021-12-22 09:23:50,795 INFO L78 Accepts]: Start accepts. Automaton has 10608 states and 14374 transitions. Word has length 229 [2021-12-22 09:23:50,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:50,796 INFO L470 AbstractCegarLoop]: Abstraction has 10608 states and 14374 transitions. [2021-12-22 09:23:50,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:50,796 INFO L276 IsEmpty]: Start isEmpty. Operand 10608 states and 14374 transitions. [2021-12-22 09:23:50,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2021-12-22 09:23:50,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:50,800 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:50,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 09:23:50,801 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:50,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1134775617, now seen corresponding path program 1 times [2021-12-22 09:23:50,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:50,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074001135] [2021-12-22 09:23:50,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:50,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:50,926 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-12-22 09:23:50,927 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:50,927 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074001135] [2021-12-22 09:23:50,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074001135] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:50,927 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:50,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:23:50,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168319054] [2021-12-22 09:23:50,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:50,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:50,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:50,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:50,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:50,929 INFO L87 Difference]: Start difference. First operand 10608 states and 14374 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:54,130 INFO L93 Difference]: Finished difference Result 28351 states and 39240 transitions. [2021-12-22 09:23:54,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:23:54,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 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 243 [2021-12-22 09:23:54,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:54,183 INFO L225 Difference]: With dead ends: 28351 [2021-12-22 09:23:54,184 INFO L226 Difference]: Without dead ends: 18532 [2021-12-22 09:23:54,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:54,203 INFO L933 BasicCegarLoop]: 448 mSDtfsCounter, 909 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 2872 mSolverCounterSat, 544 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 909 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 3416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 544 IncrementalHoareTripleChecker+Valid, 2872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:54,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [909 Valid, 613 Invalid, 3416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [544 Valid, 2872 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-22 09:23:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18532 states. [2021-12-22 09:23:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18532 to 18523. [2021-12-22 09:23:54,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18523 states, 18522 states have (on average 1.3251268761472843) internal successors, (24544), 18522 states have internal predecessors, (24544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:54,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18523 states to 18523 states and 24544 transitions. [2021-12-22 09:23:54,450 INFO L78 Accepts]: Start accepts. Automaton has 18523 states and 24544 transitions. Word has length 243 [2021-12-22 09:23:54,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:54,450 INFO L470 AbstractCegarLoop]: Abstraction has 18523 states and 24544 transitions. [2021-12-22 09:23:54,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 2 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:54,451 INFO L276 IsEmpty]: Start isEmpty. Operand 18523 states and 24544 transitions. [2021-12-22 09:23:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-12-22 09:23:54,454 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:54,454 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:54,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 09:23:54,454 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:54,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:54,455 INFO L85 PathProgramCache]: Analyzing trace with hash -251504526, now seen corresponding path program 1 times [2021-12-22 09:23:54,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:54,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952242729] [2021-12-22 09:23:54,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:54,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:54,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 214 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 09:23:54,555 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:54,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952242729] [2021-12-22 09:23:54,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952242729] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:54,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:54,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:23:54,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230018244] [2021-12-22 09:23:54,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:54,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:54,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:54,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:54,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:54,558 INFO L87 Difference]: Start difference. First operand 18523 states and 24544 transitions. Second operand has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:57,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:23:57,651 INFO L93 Difference]: Finished difference Result 52015 states and 69799 transitions. [2021-12-22 09:23:57,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:23:57,652 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 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 261 [2021-12-22 09:23:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:23:57,700 INFO L225 Difference]: With dead ends: 52015 [2021-12-22 09:23:57,700 INFO L226 Difference]: Without dead ends: 34281 [2021-12-22 09:23:57,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:57,718 INFO L933 BasicCegarLoop]: 833 mSDtfsCounter, 851 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 915 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 952 SdHoareTripleChecker+Invalid, 3308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 915 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-12-22 09:23:57,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 952 Invalid, 3308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [915 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-12-22 09:23:57,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34281 states. [2021-12-22 09:23:58,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34281 to 34271. [2021-12-22 09:23:58,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34271 states, 34270 states have (on average 1.2549168368835717) internal successors, (43006), 34270 states have internal predecessors, (43006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:58,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34271 states to 34271 states and 43006 transitions. [2021-12-22 09:23:58,072 INFO L78 Accepts]: Start accepts. Automaton has 34271 states and 43006 transitions. Word has length 261 [2021-12-22 09:23:58,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:23:58,073 INFO L470 AbstractCegarLoop]: Abstraction has 34271 states and 43006 transitions. [2021-12-22 09:23:58,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:23:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 34271 states and 43006 transitions. [2021-12-22 09:23:58,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-12-22 09:23:58,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:23:58,084 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:23:58,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 09:23:58,084 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:23:58,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:23:58,085 INFO L85 PathProgramCache]: Analyzing trace with hash -341439997, now seen corresponding path program 1 times [2021-12-22 09:23:58,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:23:58,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358077012] [2021-12-22 09:23:58,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:23:58,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:23:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:23:58,191 INFO L134 CoverageAnalysis]: Checked inductivity of 223 backedges. 119 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-12-22 09:23:58,191 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:23:58,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358077012] [2021-12-22 09:23:58,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358077012] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:23:58,192 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:23:58,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:23:58,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964002846] [2021-12-22 09:23:58,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:23:58,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:23:58,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:23:58,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:23:58,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:23:58,193 INFO L87 Difference]: Start difference. First operand 34271 states and 43006 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:01,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:01,049 INFO L93 Difference]: Finished difference Result 92929 states and 117608 transitions. [2021-12-22 09:24:01,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:01,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 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 292 [2021-12-22 09:24:01,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:01,143 INFO L225 Difference]: With dead ends: 92929 [2021-12-22 09:24:01,143 INFO L226 Difference]: Without dead ends: 59447 [2021-12-22 09:24:01,182 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:01,183 INFO L933 BasicCegarLoop]: 839 mSDtfsCounter, 857 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 869 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 3177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 869 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:01,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [857 Valid, 986 Invalid, 3177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [869 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-22 09:24:01,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59447 states. [2021-12-22 09:24:01,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59447 to 56294. [2021-12-22 09:24:01,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56294 states, 56293 states have (on average 1.2005045032242019) internal successors, (67580), 56293 states have internal predecessors, (67580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:01,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56294 states to 56294 states and 67580 transitions. [2021-12-22 09:24:01,982 INFO L78 Accepts]: Start accepts. Automaton has 56294 states and 67580 transitions. Word has length 292 [2021-12-22 09:24:01,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:01,982 INFO L470 AbstractCegarLoop]: Abstraction has 56294 states and 67580 transitions. [2021-12-22 09:24:01,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 2 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:01,982 INFO L276 IsEmpty]: Start isEmpty. Operand 56294 states and 67580 transitions. [2021-12-22 09:24:01,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-12-22 09:24:01,987 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:01,988 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-12-22 09:24:01,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 09:24:01,988 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:01,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:01,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1187004232, now seen corresponding path program 1 times [2021-12-22 09:24:01,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:01,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565177491] [2021-12-22 09:24:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:01,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:02,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 179 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-22 09:24:02,265 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:02,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565177491] [2021-12-22 09:24:02,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565177491] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:02,266 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:24:02,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:24:02,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497497625] [2021-12-22 09:24:02,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:02,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:02,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:02,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:02,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:02,267 INFO L87 Difference]: Start difference. First operand 56294 states and 67580 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:05,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:05,825 INFO L93 Difference]: Finished difference Result 133057 states and 162012 transitions. [2021-12-22 09:24:05,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:05,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 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 350 [2021-12-22 09:24:05,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:05,937 INFO L225 Difference]: With dead ends: 133057 [2021-12-22 09:24:05,937 INFO L226 Difference]: Without dead ends: 77552 [2021-12-22 09:24:05,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:05,958 INFO L933 BasicCegarLoop]: 1796 mSDtfsCounter, 808 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 2542 mSolverCounterSat, 723 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 808 SdHoareTripleChecker+Valid, 1947 SdHoareTripleChecker+Invalid, 3265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 723 IncrementalHoareTripleChecker+Valid, 2542 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:05,958 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [808 Valid, 1947 Invalid, 3265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [723 Valid, 2542 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-12-22 09:24:06,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77552 states. [2021-12-22 09:24:06,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77552 to 76759. [2021-12-22 09:24:06,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76759 states, 76758 states have (on average 1.1668099742046432) internal successors, (89562), 76758 states have internal predecessors, (89562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:06,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76759 states to 76759 states and 89562 transitions. [2021-12-22 09:24:06,932 INFO L78 Accepts]: Start accepts. Automaton has 76759 states and 89562 transitions. Word has length 350 [2021-12-22 09:24:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:06,933 INFO L470 AbstractCegarLoop]: Abstraction has 76759 states and 89562 transitions. [2021-12-22 09:24:06,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:06,933 INFO L276 IsEmpty]: Start isEmpty. Operand 76759 states and 89562 transitions. [2021-12-22 09:24:06,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-22 09:24:06,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:06,940 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:06,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 09:24:06,940 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:06,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:06,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1602599278, now seen corresponding path program 1 times [2021-12-22 09:24:06,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:06,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002012236] [2021-12-22 09:24:06,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:06,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:06,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:07,023 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 409 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 09:24:07,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:07,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002012236] [2021-12-22 09:24:07,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002012236] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:07,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:24:07,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:24:07,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087753814] [2021-12-22 09:24:07,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:07,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 09:24:07,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:07,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 09:24:07,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:24:07,026 INFO L87 Difference]: Start difference. First operand 76759 states and 89562 transitions. Second operand has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:13,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:13,531 INFO L93 Difference]: Finished difference Result 205688 states and 241921 transitions. [2021-12-22 09:24:13,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 09:24:13,532 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 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 359 [2021-12-22 09:24:13,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:13,723 INFO L225 Difference]: With dead ends: 205688 [2021-12-22 09:24:13,723 INFO L226 Difference]: Without dead ends: 129718 [2021-12-22 09:24:13,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-22 09:24:13,923 INFO L933 BasicCegarLoop]: 465 mSDtfsCounter, 1736 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 6653 mSolverCounterSat, 1133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1736 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 7786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1133 IncrementalHoareTripleChecker+Valid, 6653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:13,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1736 Valid, 707 Invalid, 7786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1133 Valid, 6653 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2021-12-22 09:24:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129718 states. [2021-12-22 09:24:15,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129718 to 128793. [2021-12-22 09:24:15,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128793 states, 128792 states have (on average 1.162339275731412) internal successors, (149700), 128792 states have internal predecessors, (149700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:15,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128793 states to 128793 states and 149700 transitions. [2021-12-22 09:24:15,481 INFO L78 Accepts]: Start accepts. Automaton has 128793 states and 149700 transitions. Word has length 359 [2021-12-22 09:24:15,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:15,482 INFO L470 AbstractCegarLoop]: Abstraction has 128793 states and 149700 transitions. [2021-12-22 09:24:15,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 75.0) internal successors, (300), 3 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:15,482 INFO L276 IsEmpty]: Start isEmpty. Operand 128793 states and 149700 transitions. [2021-12-22 09:24:15,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2021-12-22 09:24:15,487 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:15,487 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:15,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 09:24:15,488 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:15,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:15,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1513951045, now seen corresponding path program 1 times [2021-12-22 09:24:15,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:15,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568774249] [2021-12-22 09:24:15,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:15,489 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:15,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 443 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2021-12-22 09:24:15,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:15,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568774249] [2021-12-22 09:24:15,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568774249] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:15,569 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:24:15,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 09:24:15,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507650515] [2021-12-22 09:24:15,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:15,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:15,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:15,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:15,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:15,571 INFO L87 Difference]: Start difference. First operand 128793 states and 149700 transitions. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:19,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:19,114 INFO L93 Difference]: Finished difference Result 240271 states and 281024 transitions. [2021-12-22 09:24:19,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:19,115 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 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 359 [2021-12-22 09:24:19,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:19,372 INFO L225 Difference]: With dead ends: 240271 [2021-12-22 09:24:19,372 INFO L226 Difference]: Without dead ends: 128806 [2021-12-22 09:24:19,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:19,459 INFO L933 BasicCegarLoop]: 1019 mSDtfsCounter, 730 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 2705 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 730 SdHoareTripleChecker+Valid, 1199 SdHoareTripleChecker+Invalid, 2709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 2705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:19,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [730 Valid, 1199 Invalid, 2709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 2705 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2021-12-22 09:24:19,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128806 states. [2021-12-22 09:24:20,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128806 to 128006. [2021-12-22 09:24:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128006 states, 128005 states have (on average 1.1624389672278426) internal successors, (148798), 128005 states have internal predecessors, (148798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128006 states to 128006 states and 148798 transitions. [2021-12-22 09:24:21,116 INFO L78 Accepts]: Start accepts. Automaton has 128006 states and 148798 transitions. Word has length 359 [2021-12-22 09:24:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:21,116 INFO L470 AbstractCegarLoop]: Abstraction has 128006 states and 148798 transitions. [2021-12-22 09:24:21,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 2 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:21,117 INFO L276 IsEmpty]: Start isEmpty. Operand 128006 states and 148798 transitions. [2021-12-22 09:24:21,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 389 [2021-12-22 09:24:21,121 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:21,122 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 09:24:21,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 09:24:21,122 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:21,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:21,123 INFO L85 PathProgramCache]: Analyzing trace with hash 558961745, now seen corresponding path program 1 times [2021-12-22 09:24:21,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:21,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905829902] [2021-12-22 09:24:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:21,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:21,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:21,403 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 288 proven. 113 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-12-22 09:24:21,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:21,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905829902] [2021-12-22 09:24:21,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905829902] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 09:24:21,403 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207075672] [2021-12-22 09:24:21,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:21,404 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 09:24:21,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 09:24:21,405 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-22 09:24:21,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-22 09:24:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:21,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-22 09:24:21,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 09:24:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 461 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-22 09:24:22,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-22 09:24:22,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [207075672] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:22,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-22 09:24:22,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-12-22 09:24:22,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640376397] [2021-12-22 09:24:22,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:22,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:22,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:22,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:22,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:24:22,491 INFO L87 Difference]: Start difference. First operand 128006 states and 148798 transitions. Second operand has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:25,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:25,682 INFO L93 Difference]: Finished difference Result 254434 states and 295649 transitions. [2021-12-22 09:24:25,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:25,683 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 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 388 [2021-12-22 09:24:25,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:26,135 INFO L225 Difference]: With dead ends: 254434 [2021-12-22 09:24:26,135 INFO L226 Difference]: Without dead ends: 127217 [2021-12-22 09:24:26,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 387 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-22 09:24:26,193 INFO L933 BasicCegarLoop]: 1363 mSDtfsCounter, 1122 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 2466 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1122 SdHoareTripleChecker+Valid, 1444 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 2466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:26,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1122 Valid, 1444 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 2466 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-22 09:24:26,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127217 states. [2021-12-22 09:24:27,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127217 to 127216. [2021-12-22 09:24:27,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127216 states, 127215 states have (on average 1.1196792831034077) internal successors, (142440), 127215 states have internal predecessors, (142440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:27,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127216 states to 127216 states and 142440 transitions. [2021-12-22 09:24:27,811 INFO L78 Accepts]: Start accepts. Automaton has 127216 states and 142440 transitions. Word has length 388 [2021-12-22 09:24:27,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 09:24:27,812 INFO L470 AbstractCegarLoop]: Abstraction has 127216 states and 142440 transitions. [2021-12-22 09:24:27,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 72.33333333333333) internal successors, (217), 3 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 127216 states and 142440 transitions. [2021-12-22 09:24:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2021-12-22 09:24:27,821 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 09:24:27,822 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2021-12-22 09:24:27,848 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-22 09:24:28,039 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,SelfDestructingSolverStorable9 [2021-12-22 09:24:28,040 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 09:24:28,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 09:24:28,040 INFO L85 PathProgramCache]: Analyzing trace with hash -684842412, now seen corresponding path program 1 times [2021-12-22 09:24:28,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 09:24:28,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343742917] [2021-12-22 09:24:28,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 09:24:28,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 09:24:28,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 09:24:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 738 backedges. 466 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-12-22 09:24:28,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 09:24:28,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343742917] [2021-12-22 09:24:28,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343742917] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 09:24:28,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 09:24:28,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 09:24:28,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374297031] [2021-12-22 09:24:28,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 09:24:28,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 09:24:28,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 09:24:28,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 09:24:28,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:28,160 INFO L87 Difference]: Start difference. First operand 127216 states and 142440 transitions. Second operand has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 09:24:32,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 09:24:32,060 INFO L93 Difference]: Finished difference Result 279629 states and 316499 transitions. [2021-12-22 09:24:32,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 09:24:32,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 91.33333333333333) internal successors, (274), 3 states have internal predecessors, (274), 0 states have call successors, (0), 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 456 [2021-12-22 09:24:32,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 09:24:32,271 INFO L225 Difference]: With dead ends: 279629 [2021-12-22 09:24:32,271 INFO L226 Difference]: Without dead ends: 153202 [2021-12-22 09:24:32,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 09:24:32,307 INFO L933 BasicCegarLoop]: 1759 mSDtfsCounter, 787 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2534 mSolverCounterSat, 714 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 3248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 714 IncrementalHoareTripleChecker+Valid, 2534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2021-12-22 09:24:32,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 1913 Invalid, 3248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [714 Valid, 2534 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2021-12-22 09:24:32,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153202 states. [2021-12-22 09:24:33,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153202 to 150820. [2021-12-22 09:24:33,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150820 states, 150819 states have (on average 1.1036474184287126) internal successors, (166451), 150819 states have internal predecessors, (166451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)