./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.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 890f1e18995284b0a908a97d5deeec0465d64ba29b3115b90de791926566ed26 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-e19ca92 [2021-12-22 13:00:29,386 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-22 13:00:29,387 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-22 13:00:29,417 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-22 13:00:29,420 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-22 13:00:29,422 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-22 13:00:29,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-22 13:00:29,434 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-22 13:00:29,436 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-22 13:00:29,440 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-22 13:00:29,441 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-22 13:00:29,442 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-22 13:00:29,443 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-22 13:00:29,445 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-22 13:00:29,447 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-22 13:00:29,449 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-22 13:00:29,449 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-22 13:00:29,450 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-22 13:00:29,453 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-22 13:00:29,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-22 13:00:29,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-22 13:00:29,460 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-22 13:00:29,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-22 13:00:29,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-22 13:00:29,468 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-22 13:00:29,469 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-22 13:00:29,469 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-22 13:00:29,470 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-22 13:00:29,471 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-22 13:00:29,472 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-22 13:00:29,472 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-22 13:00:29,473 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-22 13:00:29,474 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-22 13:00:29,475 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-22 13:00:29,476 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-22 13:00:29,476 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-22 13:00:29,478 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-22 13:00:29,478 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-22 13:00:29,478 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-22 13:00:29,479 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-22 13:00:29,479 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-22 13:00:29,480 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-22 13:00:29,513 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-22 13:00:29,514 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-22 13:00:29,514 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-22 13:00:29,515 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-22 13:00:29,515 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-22 13:00:29,516 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-22 13:00:29,516 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-22 13:00:29,516 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-22 13:00:29,516 INFO L138 SettingsManager]: * Use SBE=true [2021-12-22 13:00:29,517 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-22 13:00:29,517 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-22 13:00:29,518 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-22 13:00:29,518 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-22 13:00:29,518 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-22 13:00:29,518 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-22 13:00:29,518 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-22 13:00:29,519 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-22 13:00:29,519 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-22 13:00:29,519 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-22 13:00:29,519 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-22 13:00:29,519 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-22 13:00:29,523 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-22 13:00:29,523 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-22 13:00:29,524 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-22 13:00:29,524 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:00:29,524 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-22 13:00:29,524 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-22 13:00:29,525 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-22 13:00:29,525 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-22 13:00:29,525 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-22 13:00:29,525 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-22 13:00:29,525 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-22 13:00:29,526 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-22 13:00:29,526 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-22 13:00:29,526 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 890f1e18995284b0a908a97d5deeec0465d64ba29b3115b90de791926566ed26 [2021-12-22 13:00:29,775 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-22 13:00:29,798 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-22 13:00:29,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-22 13:00:29,801 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-22 13:00:29,801 INFO L275 PluginConnector]: CDTParser initialized [2021-12-22 13:00:29,802 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-22 13:00:29,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19f407418/20b7d3583822405182f9a1fd7707d7ea/FLAGb4db1cbf3 [2021-12-22 13:00:30,501 INFO L306 CDTParser]: Found 1 translation units. [2021-12-22 13:00:30,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-22 13:00:30,537 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19f407418/20b7d3583822405182f9a1fd7707d7ea/FLAGb4db1cbf3 [2021-12-22 13:00:30,831 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/19f407418/20b7d3583822405182f9a1fd7707d7ea [2021-12-22 13:00:30,833 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-22 13:00:30,836 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-22 13:00:30,840 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-22 13:00:30,840 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-22 13:00:30,843 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-22 13:00:30,843 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:00:30" (1/1) ... [2021-12-22 13:00:30,844 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50ea313f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:00:30, skipping insertion in model container [2021-12-22 13:00:30,845 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:00:30" (1/1) ... [2021-12-22 13:00:30,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-22 13:00:30,971 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-22 13:00:31,298 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c[11668,11681] [2021-12-22 13:00:31,317 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c[13543,13556] [2021-12-22 13:00:31,997 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:00:32,005 INFO L203 MainTranslator]: Completed pre-run [2021-12-22 13:00:32,046 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c[11668,11681] [2021-12-22 13:00:32,053 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/combinations/pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c[13543,13556] [2021-12-22 13:00:32,429 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-22 13:00:32,452 INFO L208 MainTranslator]: Completed translation [2021-12-22 13:00:32,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:00:32 WrapperNode [2021-12-22 13:00:32,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-22 13:00:32,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-22 13:00:32,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-22 13:00:32,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-22 13:00:32,460 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:00:32" (1/1) ... [2021-12-22 13:00:32,514 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:00:32" (1/1) ... [2021-12-22 13:00:32,905 INFO L137 Inliner]: procedures = 37, calls = 22, calls flagged for inlining = 17, calls inlined = 17, statements flattened = 5088 [2021-12-22 13:00:32,906 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-22 13:00:32,911 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-22 13:00:32,912 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-22 13:00:32,912 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-22 13:00:32,937 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:00:32" (1/1) ... [2021-12-22 13:00:32,938 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:00:32" (1/1) ... [2021-12-22 13:00:33,013 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:00:32" (1/1) ... [2021-12-22 13:00:33,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:00:32" (1/1) ... [2021-12-22 13:00:33,272 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:00:32" (1/1) ... [2021-12-22 13:00:33,303 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:00:32" (1/1) ... [2021-12-22 13:00:33,358 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:00:32" (1/1) ... [2021-12-22 13:00:33,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-22 13:00:33,477 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-22 13:00:33,477 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-22 13:00:33,477 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-22 13:00:33,479 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:00:32" (1/1) ... [2021-12-22 13:00:33,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-22 13:00:33,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:00:33,521 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 13:00:33,534 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 13:00:33,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-22 13:00:33,576 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-22 13:00:33,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-22 13:00:33,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-22 13:00:33,738 INFO L234 CfgBuilder]: Building ICFG [2021-12-22 13:00:33,744 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-22 13:00:37,272 INFO L275 CfgBuilder]: Performing block encoding [2021-12-22 13:00:37,293 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-22 13:00:37,294 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-22 13:00:37,297 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:00:37 BoogieIcfgContainer [2021-12-22 13:00:37,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-22 13:00:37,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-22 13:00:37,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-22 13:00:37,303 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-22 13:00:37,303 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:00:30" (1/3) ... [2021-12-22 13:00:37,303 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a337ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:00:37, skipping insertion in model container [2021-12-22 13:00:37,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:00:32" (2/3) ... [2021-12-22 13:00:37,304 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@63a337ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:00:37, skipping insertion in model container [2021-12-22 13:00:37,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:00:37" (3/3) ... [2021-12-22 13:00:37,305 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals+Problem12_label00.c [2021-12-22 13:00:37,310 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-22 13:00:37,310 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-22 13:00:37,365 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-22 13:00:37,373 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 13:00:37,374 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-22 13:00:37,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 0 states have call successors, (0), 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 13:00:37,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-22 13:00:37,414 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:37,414 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:00:37,415 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:37,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:37,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1599021611, now seen corresponding path program 1 times [2021-12-22 13:00:37,427 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:37,427 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180718569] [2021-12-22 13:00:37,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:37,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:37,644 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 13:00:37,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:37,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180718569] [2021-12-22 13:00:37,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180718569] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:37,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:37,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-22 13:00:37,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850687579] [2021-12-22 13:00:37,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:37,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:00:37,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:37,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:00:37,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:00:37,683 INFO L87 Difference]: Start difference. First operand has 911 states, 908 states have (on average 1.8997797356828194) internal successors, (1725), 910 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 13:00:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:41,082 INFO L93 Difference]: Finished difference Result 2538 states and 4880 transitions. [2021-12-22 13:00:41,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:00:41,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 16 [2021-12-22 13:00:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:41,106 INFO L225 Difference]: With dead ends: 2538 [2021-12-22 13:00:41,106 INFO L226 Difference]: Without dead ends: 1596 [2021-12-22 13:00:41,114 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 13:00:41,117 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 1035 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 2437 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1035 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 3208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 2437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:41,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1035 Valid, 311 Invalid, 3208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 2437 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-12-22 13:00:41,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-12-22 13:00:41,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1596. [2021-12-22 13:00:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1594 states have (on average 1.8387703889585947) internal successors, (2931), 1595 states have internal predecessors, (2931), 0 states have call successors, (0), 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 13:00:41,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2931 transitions. [2021-12-22 13:00:41,241 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2931 transitions. Word has length 16 [2021-12-22 13:00:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:41,242 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 2931 transitions. [2021-12-22 13:00:41,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 2 states have internal predecessors, (16), 0 states have call successors, (0), 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 13:00:41,242 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2931 transitions. [2021-12-22 13:00:41,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-12-22 13:00:41,244 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:41,244 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] [2021-12-22 13:00:41,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-22 13:00:41,245 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:41,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1592898568, now seen corresponding path program 1 times [2021-12-22 13:00:41,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:41,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057203118] [2021-12-22 13:00:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:41,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:41,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:41,349 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 13:00:41,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:41,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057203118] [2021-12-22 13:00:41,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057203118] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:41,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:41,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:00:41,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975034652] [2021-12-22 13:00:41,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:41,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:00:41,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:41,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:00:41,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:00:41,357 INFO L87 Difference]: Start difference. First operand 1596 states and 2931 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 13:00:41,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:41,432 INFO L93 Difference]: Finished difference Result 1654 states and 3020 transitions. [2021-12-22 13:00:41,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-22 13:00:41,433 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 34 [2021-12-22 13:00:41,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:41,440 INFO L225 Difference]: With dead ends: 1654 [2021-12-22 13:00:41,441 INFO L226 Difference]: Without dead ends: 1596 [2021-12-22 13:00:41,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:00:41,448 INFO L933 BasicCegarLoop]: 1590 mSDtfsCounter, 3 mSDsluCounter, 4736 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 6326 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:41,448 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 6326 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:00:41,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1596 states. [2021-12-22 13:00:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1596 to 1596. [2021-12-22 13:00:41,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1594 states have (on average 1.819322459222083) internal successors, (2900), 1595 states have internal predecessors, (2900), 0 states have call successors, (0), 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 13:00:41,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 2900 transitions. [2021-12-22 13:00:41,488 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 2900 transitions. Word has length 34 [2021-12-22 13:00:41,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:41,488 INFO L470 AbstractCegarLoop]: Abstraction has 1596 states and 2900 transitions. [2021-12-22 13:00:41,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 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 13:00:41,489 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 2900 transitions. [2021-12-22 13:00:41,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 13:00:41,494 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:41,494 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:00:41,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-22 13:00:41,495 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:41,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:41,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1337087153, now seen corresponding path program 1 times [2021-12-22 13:00:41,496 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:41,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406174248] [2021-12-22 13:00:41,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:41,496 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:41,572 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 13:00:41,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:41,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406174248] [2021-12-22 13:00:41,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406174248] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:41,573 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:41,574 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:00:41,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157607562] [2021-12-22 13:00:41,574 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:41,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:00:41,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:41,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:00:41,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:00:41,576 INFO L87 Difference]: Start difference. First operand 1596 states and 2900 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 13:00:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:41,606 INFO L93 Difference]: Finished difference Result 1698 states and 3060 transitions. [2021-12-22 13:00:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:00:41,607 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-22 13:00:41,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:41,613 INFO L225 Difference]: With dead ends: 1698 [2021-12-22 13:00:41,614 INFO L226 Difference]: Without dead ends: 1644 [2021-12-22 13:00:41,614 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 13:00:41,615 INFO L933 BasicCegarLoop]: 1577 mSDtfsCounter, 1498 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 1676 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:41,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1498 Valid, 1676 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:00:41,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1644 states. [2021-12-22 13:00:41,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1644 to 1642. [2021-12-22 13:00:41,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1642 states, 1640 states have (on average 1.8128048780487804) internal successors, (2973), 1641 states have internal predecessors, (2973), 0 states have call successors, (0), 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 13:00:41,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1642 states to 1642 states and 2973 transitions. [2021-12-22 13:00:41,649 INFO L78 Accepts]: Start accepts. Automaton has 1642 states and 2973 transitions. Word has length 64 [2021-12-22 13:00:41,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:41,650 INFO L470 AbstractCegarLoop]: Abstraction has 1642 states and 2973 transitions. [2021-12-22 13:00:41,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 13:00:41,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1642 states and 2973 transitions. [2021-12-22 13:00:41,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-12-22 13:00:41,651 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:41,652 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:00:41,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-22 13:00:41,652 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:41,653 INFO L85 PathProgramCache]: Analyzing trace with hash -119101755, now seen corresponding path program 1 times [2021-12-22 13:00:41,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:41,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941767322] [2021-12-22 13:00:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:41,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:41,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:41,736 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 13:00:41,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:41,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941767322] [2021-12-22 13:00:41,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941767322] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:41,737 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:41,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:00:41,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225628679] [2021-12-22 13:00:41,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:41,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:00:41,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:41,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:00:41,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:00:41,741 INFO L87 Difference]: Start difference. First operand 1642 states and 2973 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 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 13:00:41,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:41,961 INFO L93 Difference]: Finished difference Result 2642 states and 4553 transitions. [2021-12-22 13:00:41,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-22 13:00:41,961 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-12-22 13:00:41,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:41,974 INFO L225 Difference]: With dead ends: 2642 [2021-12-22 13:00:41,974 INFO L226 Difference]: Without dead ends: 2542 [2021-12-22 13:00:41,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-12-22 13:00:41,984 INFO L933 BasicCegarLoop]: 1555 mSDtfsCounter, 8419 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8419 SdHoareTripleChecker+Valid, 2463 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:41,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8419 Valid, 2463 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:00:41,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2542 states. [2021-12-22 13:00:42,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2542 to 1740. [2021-12-22 13:00:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1740 states, 1738 states have (on average 1.7986191024165707) internal successors, (3126), 1739 states have internal predecessors, (3126), 0 states have call successors, (0), 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 13:00:42,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1740 states to 1740 states and 3126 transitions. [2021-12-22 13:00:42,043 INFO L78 Accepts]: Start accepts. Automaton has 1740 states and 3126 transitions. Word has length 64 [2021-12-22 13:00:42,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:42,045 INFO L470 AbstractCegarLoop]: Abstraction has 1740 states and 3126 transitions. [2021-12-22 13:00:42,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 7 states have internal predecessors, (64), 0 states have call successors, (0), 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 13:00:42,045 INFO L276 IsEmpty]: Start isEmpty. Operand 1740 states and 3126 transitions. [2021-12-22 13:00:42,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:00:42,046 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:42,046 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:00:42,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-22 13:00:42,047 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:42,049 INFO L85 PathProgramCache]: Analyzing trace with hash 91634997, now seen corresponding path program 1 times [2021-12-22 13:00:42,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:42,050 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171744702] [2021-12-22 13:00:42,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:42,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:42,142 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 13:00:42,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:42,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171744702] [2021-12-22 13:00:42,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171744702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:42,143 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:42,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:00:42,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037751235] [2021-12-22 13:00:42,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:42,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:00:42,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:42,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:00:42,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:00:42,145 INFO L87 Difference]: Start difference. First operand 1740 states and 3126 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:00:42,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:42,200 INFO L93 Difference]: Finished difference Result 2114 states and 3710 transitions. [2021-12-22 13:00:42,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:00:42,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-22 13:00:42,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:42,209 INFO L225 Difference]: With dead ends: 2114 [2021-12-22 13:00:42,209 INFO L226 Difference]: Without dead ends: 1916 [2021-12-22 13:00:42,211 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 13:00:42,211 INFO L933 BasicCegarLoop]: 1557 mSDtfsCounter, 1489 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1489 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:42,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1489 Valid, 1635 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:00:42,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1916 states. [2021-12-22 13:00:42,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1916 to 1910. [2021-12-22 13:00:42,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1908 states have (on average 1.7735849056603774) internal successors, (3384), 1909 states have internal predecessors, (3384), 0 states have call successors, (0), 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 13:00:42,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 3384 transitions. [2021-12-22 13:00:42,279 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 3384 transitions. Word has length 66 [2021-12-22 13:00:42,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:42,284 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 3384 transitions. [2021-12-22 13:00:42,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:00:42,284 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 3384 transitions. [2021-12-22 13:00:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:00:42,286 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:42,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:00:42,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-22 13:00:42,287 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:42,291 INFO L85 PathProgramCache]: Analyzing trace with hash 158128509, now seen corresponding path program 1 times [2021-12-22 13:00:42,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:42,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284225745] [2021-12-22 13:00:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:42,293 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:42,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:42,545 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 13:00:42,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:42,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284225745] [2021-12-22 13:00:42,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284225745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:42,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:42,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:00:42,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774050299] [2021-12-22 13:00:42,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:42,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:00:42,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:42,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:00:42,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:00:42,548 INFO L87 Difference]: Start difference. First operand 1910 states and 3384 transitions. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:00:42,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:42,728 INFO L93 Difference]: Finished difference Result 2280 states and 3954 transitions. [2021-12-22 13:00:42,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:00:42,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-22 13:00:42,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:42,737 INFO L225 Difference]: With dead ends: 2280 [2021-12-22 13:00:42,737 INFO L226 Difference]: Without dead ends: 1912 [2021-12-22 13:00:42,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-12-22 13:00:42,739 INFO L933 BasicCegarLoop]: 1568 mSDtfsCounter, 3170 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3170 SdHoareTripleChecker+Valid, 1896 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:42,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3170 Valid, 1896 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:00:42,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1912 states. [2021-12-22 13:00:42,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1912 to 1910. [2021-12-22 13:00:42,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1910 states, 1908 states have (on average 1.771488469601677) internal successors, (3380), 1909 states have internal predecessors, (3380), 0 states have call successors, (0), 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 13:00:42,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 3380 transitions. [2021-12-22 13:00:42,797 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 3380 transitions. Word has length 66 [2021-12-22 13:00:42,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:42,797 INFO L470 AbstractCegarLoop]: Abstraction has 1910 states and 3380 transitions. [2021-12-22 13:00:42,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:00:42,797 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 3380 transitions. [2021-12-22 13:00:42,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:00:42,798 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:42,798 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:00:42,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-22 13:00:42,799 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:42,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:42,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1100417095, now seen corresponding path program 1 times [2021-12-22 13:00:42,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:42,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119973167] [2021-12-22 13:00:42,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:42,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:42,833 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 13:00:42,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:42,834 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119973167] [2021-12-22 13:00:42,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119973167] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:42,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:42,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:00:42,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106334672] [2021-12-22 13:00:42,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:42,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:00:42,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:42,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:00:42,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:00:42,836 INFO L87 Difference]: Start difference. First operand 1910 states and 3380 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:00:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:42,903 INFO L93 Difference]: Finished difference Result 2598 states and 4430 transitions. [2021-12-22 13:00:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:00:42,904 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-22 13:00:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:42,913 INFO L225 Difference]: With dead ends: 2598 [2021-12-22 13:00:42,913 INFO L226 Difference]: Without dead ends: 2230 [2021-12-22 13:00:42,915 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 13:00:42,916 INFO L933 BasicCegarLoop]: 1591 mSDtfsCounter, 1502 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1502 SdHoareTripleChecker+Valid, 1686 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:42,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1502 Valid, 1686 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:00:42,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2230 states. [2021-12-22 13:00:42,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2230 to 2228. [2021-12-22 13:00:42,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2228 states, 2226 states have (on average 1.7322551662174304) internal successors, (3856), 2227 states have internal predecessors, (3856), 0 states have call successors, (0), 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 13:00:42,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2228 states to 2228 states and 3856 transitions. [2021-12-22 13:00:42,995 INFO L78 Accepts]: Start accepts. Automaton has 2228 states and 3856 transitions. Word has length 66 [2021-12-22 13:00:42,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:42,995 INFO L470 AbstractCegarLoop]: Abstraction has 2228 states and 3856 transitions. [2021-12-22 13:00:42,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:00:42,996 INFO L276 IsEmpty]: Start isEmpty. Operand 2228 states and 3856 transitions. [2021-12-22 13:00:42,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:00:42,996 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:42,997 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:00:42,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-22 13:00:42,997 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:42,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:42,998 INFO L85 PathProgramCache]: Analyzing trace with hash -826729383, now seen corresponding path program 1 times [2021-12-22 13:00:42,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:42,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213865232] [2021-12-22 13:00:42,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:42,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:43,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:43,041 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 13:00:43,041 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:43,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213865232] [2021-12-22 13:00:43,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213865232] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:43,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:43,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:00:43,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094573066] [2021-12-22 13:00:43,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:43,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:00:43,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:43,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:00:43,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:00:43,044 INFO L87 Difference]: Start difference. First operand 2228 states and 3856 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:00:43,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:43,147 INFO L93 Difference]: Finished difference Result 3504 states and 5778 transitions. [2021-12-22 13:00:43,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:00:43,147 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-22 13:00:43,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:43,157 INFO L225 Difference]: With dead ends: 3504 [2021-12-22 13:00:43,157 INFO L226 Difference]: Without dead ends: 2818 [2021-12-22 13:00:43,159 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 13:00:43,160 INFO L933 BasicCegarLoop]: 1604 mSDtfsCounter, 1506 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1506 SdHoareTripleChecker+Valid, 1695 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:43,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1506 Valid, 1695 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:00:43,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2818 states. [2021-12-22 13:00:43,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2818 to 2816. [2021-12-22 13:00:43,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2814 states have (on average 1.6773276474769012) internal successors, (4720), 2815 states have internal predecessors, (4720), 0 states have call successors, (0), 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 13:00:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 4720 transitions. [2021-12-22 13:00:43,287 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 4720 transitions. Word has length 66 [2021-12-22 13:00:43,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:43,287 INFO L470 AbstractCegarLoop]: Abstraction has 2816 states and 4720 transitions. [2021-12-22 13:00:43,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:00:43,288 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 4720 transitions. [2021-12-22 13:00:43,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-22 13:00:43,289 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:43,289 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:00:43,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-22 13:00:43,290 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:43,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:43,290 INFO L85 PathProgramCache]: Analyzing trace with hash 992342265, now seen corresponding path program 1 times [2021-12-22 13:00:43,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:43,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925315293] [2021-12-22 13:00:43,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:43,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:43,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:43,339 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 13:00:43,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:43,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925315293] [2021-12-22 13:00:43,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925315293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:43,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:43,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:00:43,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12957645] [2021-12-22 13:00:43,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:43,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:00:43,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:43,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:00:43,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:00:43,342 INFO L87 Difference]: Start difference. First operand 2816 states and 4720 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:00:43,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:43,565 INFO L93 Difference]: Finished difference Result 5172 states and 8210 transitions. [2021-12-22 13:00:43,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:00:43,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 66 [2021-12-22 13:00:43,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:43,580 INFO L225 Difference]: With dead ends: 5172 [2021-12-22 13:00:43,581 INFO L226 Difference]: Without dead ends: 3898 [2021-12-22 13:00:43,583 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 13:00:43,585 INFO L933 BasicCegarLoop]: 1617 mSDtfsCounter, 1510 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1510 SdHoareTripleChecker+Valid, 1704 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:43,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1510 Valid, 1704 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:00:43,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-12-22 13:00:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 3896. [2021-12-22 13:00:43,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3896 states, 3894 states have (on average 1.610683102208526) internal successors, (6272), 3895 states have internal predecessors, (6272), 0 states have call successors, (0), 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 13:00:43,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3896 states to 3896 states and 6272 transitions. [2021-12-22 13:00:43,794 INFO L78 Accepts]: Start accepts. Automaton has 3896 states and 6272 transitions. Word has length 66 [2021-12-22 13:00:43,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:43,795 INFO L470 AbstractCegarLoop]: Abstraction has 3896 states and 6272 transitions. [2021-12-22 13:00:43,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 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 13:00:43,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3896 states and 6272 transitions. [2021-12-22 13:00:43,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-22 13:00:43,799 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:43,799 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:00:43,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-22 13:00:43,799 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:43,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:43,800 INFO L85 PathProgramCache]: Analyzing trace with hash 192293446, now seen corresponding path program 1 times [2021-12-22 13:00:43,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:43,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027571789] [2021-12-22 13:00:43,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:43,801 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:43,867 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 13:00:43,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:43,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027571789] [2021-12-22 13:00:43,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2027571789] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:43,868 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:43,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-22 13:00:43,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172317072] [2021-12-22 13:00:43,868 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:43,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-22 13:00:43,869 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:43,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-22 13:00:43,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-22 13:00:43,870 INFO L87 Difference]: Start difference. First operand 3896 states and 6272 transitions. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 13:00:44,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:44,271 INFO L93 Difference]: Finished difference Result 5654 states and 8806 transitions. [2021-12-22 13:00:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:00:44,272 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 67 [2021-12-22 13:00:44,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:44,304 INFO L225 Difference]: With dead ends: 5654 [2021-12-22 13:00:44,305 INFO L226 Difference]: Without dead ends: 5652 [2021-12-22 13:00:44,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-22 13:00:44,307 INFO L933 BasicCegarLoop]: 1606 mSDtfsCounter, 225 mSDsluCounter, 4685 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 6291 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:44,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 6291 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:00:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5652 states. [2021-12-22 13:00:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5652 to 3992. [2021-12-22 13:00:44,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3992 states, 3990 states have (on average 1.5919799498746867) internal successors, (6352), 3991 states have internal predecessors, (6352), 0 states have call successors, (0), 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 13:00:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3992 states to 3992 states and 6352 transitions. [2021-12-22 13:00:44,588 INFO L78 Accepts]: Start accepts. Automaton has 3992 states and 6352 transitions. Word has length 67 [2021-12-22 13:00:44,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:44,588 INFO L470 AbstractCegarLoop]: Abstraction has 3992 states and 6352 transitions. [2021-12-22 13:00:44,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 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 13:00:44,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3992 states and 6352 transitions. [2021-12-22 13:00:44,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-22 13:00:44,590 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:44,590 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:00:44,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-22 13:00:44,590 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:44,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:44,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1338319212, now seen corresponding path program 1 times [2021-12-22 13:00:44,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:44,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589077293] [2021-12-22 13:00:44,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:44,592 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:44,621 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 13:00:44,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:44,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589077293] [2021-12-22 13:00:44,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589077293] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:44,622 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:44,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:00:44,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263489446] [2021-12-22 13:00:44,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:44,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:00:44,623 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:44,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:00:44,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:00:44,625 INFO L87 Difference]: Start difference. First operand 3992 states and 6352 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 13:00:44,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:44,929 INFO L93 Difference]: Finished difference Result 6495 states and 10006 transitions. [2021-12-22 13:00:44,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:00:44,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 68 [2021-12-22 13:00:44,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:44,940 INFO L225 Difference]: With dead ends: 6495 [2021-12-22 13:00:44,940 INFO L226 Difference]: Without dead ends: 5116 [2021-12-22 13:00:44,943 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 13:00:44,944 INFO L933 BasicCegarLoop]: 1625 mSDtfsCounter, 1511 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1511 SdHoareTripleChecker+Valid, 1708 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:44,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1511 Valid, 1708 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:00:44,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5116 states. [2021-12-22 13:00:45,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5116 to 5114. [2021-12-22 13:00:45,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5114 states, 5112 states have (on average 1.5528169014084507) internal successors, (7938), 5113 states have internal predecessors, (7938), 0 states have call successors, (0), 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 13:00:45,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5114 states to 5114 states and 7938 transitions. [2021-12-22 13:00:45,286 INFO L78 Accepts]: Start accepts. Automaton has 5114 states and 7938 transitions. Word has length 68 [2021-12-22 13:00:45,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:45,286 INFO L470 AbstractCegarLoop]: Abstraction has 5114 states and 7938 transitions. [2021-12-22 13:00:45,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 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 13:00:45,287 INFO L276 IsEmpty]: Start isEmpty. Operand 5114 states and 7938 transitions. [2021-12-22 13:00:45,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-22 13:00:45,288 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:45,288 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:00:45,288 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-22 13:00:45,289 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:45,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:45,289 INFO L85 PathProgramCache]: Analyzing trace with hash 363365800, now seen corresponding path program 1 times [2021-12-22 13:00:45,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:45,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104485640] [2021-12-22 13:00:45,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:45,290 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:45,359 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:00:45,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:45,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104485640] [2021-12-22 13:00:45,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104485640] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:45,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:45,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:00:45,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444713489] [2021-12-22 13:00:45,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:45,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-22 13:00:45,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:45,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-22 13:00:45,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-22 13:00:45,362 INFO L87 Difference]: Start difference. First operand 5114 states and 7938 transitions. Second operand has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 13:00:51,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:51,195 INFO L93 Difference]: Finished difference Result 8873 states and 14829 transitions. [2021-12-22 13:00:51,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-22 13:00:51,200 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 85 [2021-12-22 13:00:51,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:51,214 INFO L225 Difference]: With dead ends: 8873 [2021-12-22 13:00:51,215 INFO L226 Difference]: Without dead ends: 7369 [2021-12-22 13:00:51,218 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 13:00:51,219 INFO L933 BasicCegarLoop]: 817 mSDtfsCounter, 2405 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 4807 mSolverCounterSat, 1137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2405 SdHoareTripleChecker+Valid, 838 SdHoareTripleChecker+Invalid, 5944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1137 IncrementalHoareTripleChecker+Valid, 4807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:51,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2405 Valid, 838 Invalid, 5944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1137 Valid, 4807 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2021-12-22 13:00:51,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7369 states. [2021-12-22 13:00:51,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7369 to 7367. [2021-12-22 13:00:51,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7367 states, 7365 states have (on average 1.4294636795655125) internal successors, (10528), 7366 states have internal predecessors, (10528), 0 states have call successors, (0), 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 13:00:51,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7367 states to 7367 states and 10528 transitions. [2021-12-22 13:00:51,681 INFO L78 Accepts]: Start accepts. Automaton has 7367 states and 10528 transitions. Word has length 85 [2021-12-22 13:00:51,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:51,682 INFO L470 AbstractCegarLoop]: Abstraction has 7367 states and 10528 transitions. [2021-12-22 13:00:51,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.25) internal successors, (85), 3 states have internal predecessors, (85), 0 states have call successors, (0), 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 13:00:51,683 INFO L276 IsEmpty]: Start isEmpty. Operand 7367 states and 10528 transitions. [2021-12-22 13:00:51,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-12-22 13:00:51,684 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:51,684 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:00:51,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-22 13:00:51,685 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:51,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:51,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1621045453, now seen corresponding path program 1 times [2021-12-22 13:00:51,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:51,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332883121] [2021-12-22 13:00:51,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:51,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:51,731 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:00:51,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:51,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332883121] [2021-12-22 13:00:51,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332883121] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:51,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:51,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:00:51,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424026968] [2021-12-22 13:00:51,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:51,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:00:51,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:51,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:00:51,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:00:51,734 INFO L87 Difference]: Start difference. First operand 7367 states and 10528 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 13:00:54,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:54,478 INFO L93 Difference]: Finished difference Result 11875 states and 17912 transitions. [2021-12-22 13:00:54,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:00:54,478 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 87 [2021-12-22 13:00:54,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:54,495 INFO L225 Difference]: With dead ends: 11875 [2021-12-22 13:00:54,496 INFO L226 Difference]: Without dead ends: 8869 [2021-12-22 13:00:54,501 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 13:00:54,503 INFO L933 BasicCegarLoop]: 1092 mSDtfsCounter, 775 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 2319 mSolverCounterSat, 746 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 775 SdHoareTripleChecker+Valid, 1222 SdHoareTripleChecker+Invalid, 3065 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 746 IncrementalHoareTripleChecker+Valid, 2319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:54,503 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [775 Valid, 1222 Invalid, 3065 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [746 Valid, 2319 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-12-22 13:00:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8869 states. [2021-12-22 13:00:54,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8869 to 8869. [2021-12-22 13:00:54,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8869 states, 8867 states have (on average 1.4555091913837825) internal successors, (12906), 8868 states have internal predecessors, (12906), 0 states have call successors, (0), 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 13:00:54,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8869 states to 8869 states and 12906 transitions. [2021-12-22 13:00:54,901 INFO L78 Accepts]: Start accepts. Automaton has 8869 states and 12906 transitions. Word has length 87 [2021-12-22 13:00:54,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:54,902 INFO L470 AbstractCegarLoop]: Abstraction has 8869 states and 12906 transitions. [2021-12-22 13:00:54,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 0 states have call successors, (0), 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 13:00:54,902 INFO L276 IsEmpty]: Start isEmpty. Operand 8869 states and 12906 transitions. [2021-12-22 13:00:54,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 13:00:54,905 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:54,905 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:00:54,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-22 13:00:54,906 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:54,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:54,906 INFO L85 PathProgramCache]: Analyzing trace with hash -482219864, now seen corresponding path program 1 times [2021-12-22 13:00:54,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:54,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133663510] [2021-12-22 13:00:54,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:54,907 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:54,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-12-22 13:00:54,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:54,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133663510] [2021-12-22 13:00:54,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133663510] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:54,980 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:54,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:00:54,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489019237] [2021-12-22 13:00:54,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:54,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:00:54,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:54,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:00:54,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:00:54,982 INFO L87 Difference]: Start difference. First operand 8869 states and 12906 transitions. Second operand has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:00:56,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:56,076 INFO L93 Difference]: Finished difference Result 27441 states and 39504 transitions. [2021-12-22 13:00:56,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:00:56,077 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2021-12-22 13:00:56,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:56,128 INFO L225 Difference]: With dead ends: 27441 [2021-12-22 13:00:56,128 INFO L226 Difference]: Without dead ends: 23871 [2021-12-22 13:00:56,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:00:56,142 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6643 mSDsluCounter, 1936 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6643 SdHoareTripleChecker+Valid, 3571 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:56,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6643 Valid, 3571 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:00:56,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23871 states. [2021-12-22 13:00:56,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23871 to 12437. [2021-12-22 13:00:56,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12437 states, 12435 states have (on average 1.4457579412947326) internal successors, (17978), 12436 states have internal predecessors, (17978), 0 states have call successors, (0), 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 13:00:56,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12437 states to 12437 states and 17978 transitions. [2021-12-22 13:00:56,811 INFO L78 Accepts]: Start accepts. Automaton has 12437 states and 17978 transitions. Word has length 95 [2021-12-22 13:00:56,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:56,812 INFO L470 AbstractCegarLoop]: Abstraction has 12437 states and 17978 transitions. [2021-12-22 13:00:56,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.142857142857142) internal successors, (78), 7 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-22 13:00:56,812 INFO L276 IsEmpty]: Start isEmpty. Operand 12437 states and 17978 transitions. [2021-12-22 13:00:56,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 13:00:56,815 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:56,815 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:00:56,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-22 13:00:56,816 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:56,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:56,816 INFO L85 PathProgramCache]: Analyzing trace with hash -452697646, now seen corresponding path program 1 times [2021-12-22 13:00:56,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:56,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211240435] [2021-12-22 13:00:56,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:56,817 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:56,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:56,883 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-22 13:00:56,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:56,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211240435] [2021-12-22 13:00:56,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211240435] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:56,884 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:56,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:00:56,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286081844] [2021-12-22 13:00:56,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:56,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:00:56,885 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:56,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:00:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:00:56,885 INFO L87 Difference]: Start difference. First operand 12437 states and 17978 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 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 13:00:58,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:00:58,404 INFO L93 Difference]: Finished difference Result 31009 states and 44576 transitions. [2021-12-22 13:00:58,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:00:58,405 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 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 95 [2021-12-22 13:00:58,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:00:58,463 INFO L225 Difference]: With dead ends: 31009 [2021-12-22 13:00:58,463 INFO L226 Difference]: Without dead ends: 27439 [2021-12-22 13:00:58,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:00:58,478 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6527 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6527 SdHoareTripleChecker+Valid, 3644 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:00:58,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6527 Valid, 3644 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:00:58,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27439 states. [2021-12-22 13:00:59,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27439 to 17797. [2021-12-22 13:00:59,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17797 states, 17795 states have (on average 1.4355717898286036) internal successors, (25546), 17796 states have internal predecessors, (25546), 0 states have call successors, (0), 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 13:00:59,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17797 states to 17797 states and 25546 transitions. [2021-12-22 13:00:59,519 INFO L78 Accepts]: Start accepts. Automaton has 17797 states and 25546 transitions. Word has length 95 [2021-12-22 13:00:59,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:00:59,519 INFO L470 AbstractCegarLoop]: Abstraction has 17797 states and 25546 transitions. [2021-12-22 13:00:59,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 0 states have call successors, (0), 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 13:00:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 17797 states and 25546 transitions. [2021-12-22 13:00:59,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 13:00:59,526 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:00:59,526 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:00:59,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-22 13:00:59,526 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:00:59,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:00:59,527 INFO L85 PathProgramCache]: Analyzing trace with hash -179009934, now seen corresponding path program 1 times [2021-12-22 13:00:59,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:00:59,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102299766] [2021-12-22 13:00:59,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:00:59,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:00:59,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:00:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-22 13:00:59,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:00:59,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102299766] [2021-12-22 13:00:59,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102299766] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:00:59,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:00:59,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:00:59,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798606384] [2021-12-22 13:00:59,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:00:59,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:00:59,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:00:59,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:00:59,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:00:59,603 INFO L87 Difference]: Start difference. First operand 17797 states and 25546 transitions. Second operand has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 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 13:01:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:01:01,598 INFO L93 Difference]: Finished difference Result 34577 states and 49648 transitions. [2021-12-22 13:01:01,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:01:01,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 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 95 [2021-12-22 13:01:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:01:01,646 INFO L225 Difference]: With dead ends: 34577 [2021-12-22 13:01:01,647 INFO L226 Difference]: Without dead ends: 31007 [2021-12-22 13:01:01,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:01:01,664 INFO L933 BasicCegarLoop]: 1637 mSDtfsCounter, 6541 mSDsluCounter, 2020 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6541 SdHoareTripleChecker+Valid, 3657 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:01:01,665 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6541 Valid, 3657 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:01:01,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31007 states. [2021-12-22 13:01:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31007 to 21365. [2021-12-22 13:01:02,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21365 states, 21363 states have (on average 1.4332256705518889) internal successors, (30618), 21364 states have internal predecessors, (30618), 0 states have call successors, (0), 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 13:01:02,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21365 states to 21365 states and 30618 transitions. [2021-12-22 13:01:02,989 INFO L78 Accepts]: Start accepts. Automaton has 21365 states and 30618 transitions. Word has length 95 [2021-12-22 13:01:02,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:01:02,989 INFO L470 AbstractCegarLoop]: Abstraction has 21365 states and 30618 transitions. [2021-12-22 13:01:02,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.285714285714286) internal successors, (86), 7 states have internal predecessors, (86), 0 states have call successors, (0), 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 13:01:02,990 INFO L276 IsEmpty]: Start isEmpty. Operand 21365 states and 30618 transitions. [2021-12-22 13:01:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-12-22 13:01:02,994 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:01:02,994 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:01:02,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-22 13:01:02,995 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:01:02,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:01:02,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1640061714, now seen corresponding path program 1 times [2021-12-22 13:01:02,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:01:02,996 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470103820] [2021-12-22 13:01:02,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:01:02,996 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:01:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:01:03,084 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-22 13:01:03,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:01:03,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470103820] [2021-12-22 13:01:03,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470103820] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:01:03,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:01:03,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:01:03,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051172390] [2021-12-22 13:01:03,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:01:03,086 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:01:03,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:01:03,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:01:03,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:01:03,087 INFO L87 Difference]: Start difference. First operand 21365 states and 30618 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 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 13:01:05,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:01:05,261 INFO L93 Difference]: Finished difference Result 38145 states and 54720 transitions. [2021-12-22 13:01:05,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:01:05,262 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 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 95 [2021-12-22 13:01:05,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:01:05,315 INFO L225 Difference]: With dead ends: 38145 [2021-12-22 13:01:05,315 INFO L226 Difference]: Without dead ends: 34575 [2021-12-22 13:01:05,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:01:05,334 INFO L933 BasicCegarLoop]: 1635 mSDtfsCounter, 6608 mSDsluCounter, 2005 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6608 SdHoareTripleChecker+Valid, 3640 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-22 13:01:05,334 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6608 Valid, 3640 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-22 13:01:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34575 states. [2021-12-22 13:01:07,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34575 to 24933. [2021-12-22 13:01:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24933 states, 24931 states have (on average 1.4315510809835146) internal successors, (35690), 24932 states have internal predecessors, (35690), 0 states have call successors, (0), 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 13:01:07,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24933 states to 24933 states and 35690 transitions. [2021-12-22 13:01:07,516 INFO L78 Accepts]: Start accepts. Automaton has 24933 states and 35690 transitions. Word has length 95 [2021-12-22 13:01:07,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:01:07,516 INFO L470 AbstractCegarLoop]: Abstraction has 24933 states and 35690 transitions. [2021-12-22 13:01:07,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 0 states have call successors, (0), 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 13:01:07,516 INFO L276 IsEmpty]: Start isEmpty. Operand 24933 states and 35690 transitions. [2021-12-22 13:01:07,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-22 13:01:07,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:01:07,522 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:01:07,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-22 13:01:07,523 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:01:07,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:01:07,523 INFO L85 PathProgramCache]: Analyzing trace with hash -906023264, now seen corresponding path program 1 times [2021-12-22 13:01:07,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:01:07,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795798426] [2021-12-22 13:01:07,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:01:07,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:01:07,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:01:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:01:07,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:01:07,578 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795798426] [2021-12-22 13:01:07,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795798426] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:01:07,578 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:01:07,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:01:07,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904078663] [2021-12-22 13:01:07,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:01:07,579 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:01:07,579 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:01:07,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:01:07,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:01:07,580 INFO L87 Difference]: Start difference. First operand 24933 states and 35690 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 13:01:08,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:01:08,593 INFO L93 Difference]: Finished difference Result 38695 states and 55440 transitions. [2021-12-22 13:01:08,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:01:08,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 97 [2021-12-22 13:01:08,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:01:08,616 INFO L225 Difference]: With dead ends: 38695 [2021-12-22 13:01:08,617 INFO L226 Difference]: Without dead ends: 19061 [2021-12-22 13:01:08,639 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 13:01:08,640 INFO L933 BasicCegarLoop]: 1601 mSDtfsCounter, 54 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 3146 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:01:08,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 3146 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:01:08,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19061 states. [2021-12-22 13:01:09,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19061 to 19059. [2021-12-22 13:01:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19059 states, 19057 states have (on average 1.4355354987668574) internal successors, (27357), 19058 states have internal predecessors, (27357), 0 states have call successors, (0), 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 13:01:09,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19059 states to 19059 states and 27357 transitions. [2021-12-22 13:01:09,856 INFO L78 Accepts]: Start accepts. Automaton has 19059 states and 27357 transitions. Word has length 97 [2021-12-22 13:01:09,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:01:09,857 INFO L470 AbstractCegarLoop]: Abstraction has 19059 states and 27357 transitions. [2021-12-22 13:01:09,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 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 13:01:09,857 INFO L276 IsEmpty]: Start isEmpty. Operand 19059 states and 27357 transitions. [2021-12-22 13:01:09,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-12-22 13:01:09,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:01:09,861 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:01:09,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-22 13:01:09,861 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:01:09,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:01:09,862 INFO L85 PathProgramCache]: Analyzing trace with hash -615309075, now seen corresponding path program 1 times [2021-12-22 13:01:09,862 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:01:09,862 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989263950] [2021-12-22 13:01:09,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:01:09,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:01:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:01:09,924 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:01:09,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:01:09,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989263950] [2021-12-22 13:01:09,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989263950] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:01:09,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:01:09,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-22 13:01:09,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894108043] [2021-12-22 13:01:09,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:01:09,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-22 13:01:09,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:01:09,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-22 13:01:09,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-12-22 13:01:09,927 INFO L87 Difference]: Start difference. First operand 19059 states and 27357 transitions. Second operand has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 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 13:01:11,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:01:11,792 INFO L93 Difference]: Finished difference Result 31551 states and 45283 transitions. [2021-12-22 13:01:11,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-22 13:01:11,792 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 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 97 [2021-12-22 13:01:11,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:01:11,833 INFO L225 Difference]: With dead ends: 31551 [2021-12-22 13:01:11,833 INFO L226 Difference]: Without dead ends: 29053 [2021-12-22 13:01:11,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-22 13:01:11,846 INFO L933 BasicCegarLoop]: 1634 mSDtfsCounter, 6588 mSDsluCounter, 1974 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6588 SdHoareTripleChecker+Valid, 3608 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:01:11,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6588 Valid, 3608 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:01:11,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29053 states. [2021-12-22 13:01:13,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29053 to 21555. [2021-12-22 13:01:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21555 states, 21553 states have (on average 1.4340927017120586) internal successors, (30909), 21554 states have internal predecessors, (30909), 0 states have call successors, (0), 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 13:01:13,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21555 states to 21555 states and 30909 transitions. [2021-12-22 13:01:13,672 INFO L78 Accepts]: Start accepts. Automaton has 21555 states and 30909 transitions. Word has length 97 [2021-12-22 13:01:13,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:01:13,672 INFO L470 AbstractCegarLoop]: Abstraction has 21555 states and 30909 transitions. [2021-12-22 13:01:13,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.714285714285714) internal successors, (96), 7 states have internal predecessors, (96), 0 states have call successors, (0), 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 13:01:13,672 INFO L276 IsEmpty]: Start isEmpty. Operand 21555 states and 30909 transitions. [2021-12-22 13:01:13,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-22 13:01:13,676 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:01:13,676 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:01:13,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-22 13:01:13,677 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:01:13,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:01:13,677 INFO L85 PathProgramCache]: Analyzing trace with hash -605888281, now seen corresponding path program 1 times [2021-12-22 13:01:13,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:01:13,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572038605] [2021-12-22 13:01:13,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:01:13,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:01:13,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:01:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:01:13,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:01:13,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572038605] [2021-12-22 13:01:13,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572038605] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:01:13,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:01:13,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:01:13,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620958985] [2021-12-22 13:01:13,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:01:13,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:01:13,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:01:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:01:13,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:01:13,720 INFO L87 Difference]: Start difference. First operand 21555 states and 30909 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 13:01:14,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:01:14,657 INFO L93 Difference]: Finished difference Result 29671 states and 42455 transitions. [2021-12-22 13:01:14,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:01:14,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-22 13:01:14,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:01:14,680 INFO L225 Difference]: With dead ends: 29671 [2021-12-22 13:01:14,680 INFO L226 Difference]: Without dead ends: 13445 [2021-12-22 13:01:14,702 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 13:01:14,704 INFO L933 BasicCegarLoop]: 1594 mSDtfsCounter, 48 mSDsluCounter, 1537 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 3131 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:01:14,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 3131 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:01:14,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13445 states. [2021-12-22 13:01:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13445 to 13443. [2021-12-22 13:01:15,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13443 states, 13441 states have (on average 1.4330034967636336) internal successors, (19261), 13442 states have internal predecessors, (19261), 0 states have call successors, (0), 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 13:01:15,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13443 states to 13443 states and 19261 transitions. [2021-12-22 13:01:15,514 INFO L78 Accepts]: Start accepts. Automaton has 13443 states and 19261 transitions. Word has length 98 [2021-12-22 13:01:15,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:01:15,514 INFO L470 AbstractCegarLoop]: Abstraction has 13443 states and 19261 transitions. [2021-12-22 13:01:15,514 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 13:01:15,515 INFO L276 IsEmpty]: Start isEmpty. Operand 13443 states and 19261 transitions. [2021-12-22 13:01:15,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-22 13:01:15,516 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:01:15,517 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-22 13:01:15,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-12-22 13:01:15,517 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:01:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:01:15,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1773467421, now seen corresponding path program 1 times [2021-12-22 13:01:15,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:01:15,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831513919] [2021-12-22 13:01:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:01:15,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:01:15,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:01:15,556 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:01:15,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:01:15,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831513919] [2021-12-22 13:01:15,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [831513919] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:01:15,557 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:01:15,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:01:15,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074301001] [2021-12-22 13:01:15,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:01:15,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:01:15,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:01:15,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:01:15,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:01:15,559 INFO L87 Difference]: Start difference. First operand 13443 states and 19261 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 13:01:15,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:01:15,926 INFO L93 Difference]: Finished difference Result 17503 states and 24983 transitions. [2021-12-22 13:01:15,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:01:15,927 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-22 13:01:15,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:01:15,940 INFO L225 Difference]: With dead ends: 17503 [2021-12-22 13:01:15,940 INFO L226 Difference]: Without dead ends: 9389 [2021-12-22 13:01:15,949 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 13:01:15,949 INFO L933 BasicCegarLoop]: 1587 mSDtfsCounter, 44 mSDsluCounter, 1529 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 3116 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:01:15,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 3116 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:01:15,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9389 states. [2021-12-22 13:01:16,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9389 to 9387. [2021-12-22 13:01:16,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9387 states, 9385 states have (on average 1.4372935535428877) internal successors, (13489), 9386 states have internal predecessors, (13489), 0 states have call successors, (0), 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 13:01:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9387 states to 9387 states and 13489 transitions. [2021-12-22 13:01:16,373 INFO L78 Accepts]: Start accepts. Automaton has 9387 states and 13489 transitions. Word has length 98 [2021-12-22 13:01:16,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:01:16,374 INFO L470 AbstractCegarLoop]: Abstraction has 9387 states and 13489 transitions. [2021-12-22 13:01:16,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 13:01:16,374 INFO L276 IsEmpty]: Start isEmpty. Operand 9387 states and 13489 transitions. [2021-12-22 13:01:16,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-22 13:01:16,375 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:01:16,375 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:01:16,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-22 13:01:16,375 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:01:16,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:01:16,376 INFO L85 PathProgramCache]: Analyzing trace with hash -934897581, now seen corresponding path program 1 times [2021-12-22 13:01:16,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:01:16,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44877444] [2021-12-22 13:01:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:01:16,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:01:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:01:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:01:16,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:01:16,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44877444] [2021-12-22 13:01:16,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44877444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-22 13:01:16,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-22 13:01:16,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-22 13:01:16,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516315802] [2021-12-22 13:01:16,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-22 13:01:16,414 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-22 13:01:16,414 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:01:16,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-22 13:01:16,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-22 13:01:16,415 INFO L87 Difference]: Start difference. First operand 9387 states and 13489 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 13:01:16,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:01:16,633 INFO L93 Difference]: Finished difference Result 11419 states and 16325 transitions. [2021-12-22 13:01:16,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-22 13:01:16,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 98 [2021-12-22 13:01:16,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:01:16,642 INFO L225 Difference]: With dead ends: 11419 [2021-12-22 13:01:16,643 INFO L226 Difference]: Without dead ends: 7361 [2021-12-22 13:01:16,647 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 13:01:16,648 INFO L933 BasicCegarLoop]: 1580 mSDtfsCounter, 40 mSDsluCounter, 1521 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 3101 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-22 13:01:16,648 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 3101 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-22 13:01:16,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7361 states. [2021-12-22 13:01:16,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7361 to 7359. [2021-12-22 13:01:16,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7359 states, 7357 states have (on average 1.4447464999320374) internal successors, (10629), 7358 states have internal predecessors, (10629), 0 states have call successors, (0), 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 13:01:16,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7359 states to 7359 states and 10629 transitions. [2021-12-22 13:01:16,878 INFO L78 Accepts]: Start accepts. Automaton has 7359 states and 10629 transitions. Word has length 98 [2021-12-22 13:01:16,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-22 13:01:16,879 INFO L470 AbstractCegarLoop]: Abstraction has 7359 states and 10629 transitions. [2021-12-22 13:01:16,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 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 13:01:16,879 INFO L276 IsEmpty]: Start isEmpty. Operand 7359 states and 10629 transitions. [2021-12-22 13:01:16,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-12-22 13:01:16,880 INFO L506 BasicCegarLoop]: Found error trace [2021-12-22 13:01:16,880 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-22 13:01:16,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-12-22 13:01:16,880 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-22 13:01:16,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-22 13:01:16,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1022016375, now seen corresponding path program 1 times [2021-12-22 13:01:16,881 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-22 13:01:16,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836312561] [2021-12-22 13:01:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:01:16,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-22 13:01:16,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:01:17,106 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-22 13:01:17,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-22 13:01:17,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836312561] [2021-12-22 13:01:17,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836312561] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-22 13:01:17,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230188069] [2021-12-22 13:01:17,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-22 13:01:17,108 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-22 13:01:17,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-22 13:01:17,118 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 13:01:17,122 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 13:01:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-22 13:01:17,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 439 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-22 13:01:17,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-22 13:01:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:01:17,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-22 13:01:17,975 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-22 13:01:17,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230188069] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-22 13:01:17,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-22 13:01:17,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 4, 4] total 18 [2021-12-22 13:01:17,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308532394] [2021-12-22 13:01:17,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-22 13:01:17,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-22 13:01:17,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-22 13:01:17,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-22 13:01:17,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-12-22 13:01:17,977 INFO L87 Difference]: Start difference. First operand 7359 states and 10629 transitions. Second operand has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 0 states have call successors, (0), 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 13:01:23,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-22 13:01:23,150 INFO L93 Difference]: Finished difference Result 32535 states and 44813 transitions. [2021-12-22 13:01:23,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-12-22 13:01:23,151 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.38888888888889) internal successors, (277), 18 states have internal predecessors, (277), 0 states have call successors, (0), 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 98 [2021-12-22 13:01:23,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-22 13:01:23,194 INFO L225 Difference]: With dead ends: 32535 [2021-12-22 13:01:23,194 INFO L226 Difference]: Without dead ends: 30505 [2021-12-22 13:01:23,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 191 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2232 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1175, Invalid=5467, Unknown=0, NotChecked=0, Total=6642 [2021-12-22 13:01:23,209 INFO L933 BasicCegarLoop]: 1574 mSDtfsCounter, 13988 mSDsluCounter, 5449 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13988 SdHoareTripleChecker+Valid, 7023 SdHoareTripleChecker+Invalid, 1358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-22 13:01:23,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13988 Valid, 7023 Invalid, 1358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-22 13:01:23,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30505 states.