./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem12_label30.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem12_label30.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y --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 0e208708a27329bc1b7bf267e92e92da86b44f6d40f860b2d7ec34e4892651a8 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:25:48,151 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:25:48,155 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:25:48,207 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:25:48,208 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:25:48,209 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:25:48,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:25:48,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:25:48,216 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:25:48,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:25:48,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:25:48,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:25:48,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:25:48,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:25:48,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:25:48,227 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:25:48,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:25:48,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:25:48,232 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:25:48,235 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:25:48,238 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:25:48,239 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:25:48,241 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:25:48,242 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:25:48,246 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:25:48,247 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:25:48,247 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:25:48,248 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:25:48,249 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:25:48,250 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:25:48,251 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:25:48,252 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:25:48,253 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:25:48,254 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:25:48,256 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:25:48,256 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:25:48,257 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:25:48,257 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:25:48,258 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:25:48,259 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:25:48,259 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:25:48,260 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:25:48,285 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:25:48,286 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:25:48,286 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:25:48,286 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:25:48,287 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:25:48,288 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:25:48,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:25:48,289 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:25:48,289 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:25:48,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:25:48,289 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:25:48,290 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:25:48,290 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:25:48,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:25:48,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:25:48,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:25:48,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:25:48,291 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:25:48,291 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:25:48,292 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:25:48,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:25:48,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:25:48,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:25:48,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:25:48,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:25:48,293 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:25:48,293 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:25:48,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:25:48,294 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:25:48,294 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:25:48,294 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:25:48,295 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:25:48,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:25:48,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:25:48,295 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0e208708a27329bc1b7bf267e92e92da86b44f6d40f860b2d7ec34e4892651a8 [2021-11-13 18:25:48,533 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:25:48,555 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:25:48,558 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:25:48,559 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:25:48,560 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:25:48,562 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/eca-rers2012/Problem12_label30.c [2021-11-13 18:25:48,639 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/data/1aa88acd3/e56c6a643e9c49958585275a69ff5a5d/FLAG4fa58b373 [2021-11-13 18:25:49,432 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:25:49,433 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/sv-benchmarks/c/eca-rers2012/Problem12_label30.c [2021-11-13 18:25:49,476 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/data/1aa88acd3/e56c6a643e9c49958585275a69ff5a5d/FLAG4fa58b373 [2021-11-13 18:25:49,523 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/data/1aa88acd3/e56c6a643e9c49958585275a69ff5a5d [2021-11-13 18:25:49,527 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:25:49,530 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:25:49,534 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:25:49,534 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:25:49,538 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:25:49,539 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:25:49" (1/1) ... [2021-11-13 18:25:49,541 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48908ef9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:25:49, skipping insertion in model container [2021-11-13 18:25:49,541 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:25:49" (1/1) ... [2021-11-13 18:25:49,548 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:25:49,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:25:50,034 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/sv-benchmarks/c/eca-rers2012/Problem12_label30.c[3429,3442] [2021-11-13 18:25:51,126 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:25:51,136 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:25:51,172 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/sv-benchmarks/c/eca-rers2012/Problem12_label30.c[3429,3442] [2021-11-13 18:25:51,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:25:51,861 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:25:51,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:25:51 WrapperNode [2021-11-13 18:25:51,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:25:51,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:25:51,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:25:51,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:25:51,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:25:51" (1/1) ... [2021-11-13 18:25:51,934 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:25:51" (1/1) ... [2021-11-13 18:25:52,372 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:25:52,373 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:25:52,373 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:25:52,373 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:25:52,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:25:51" (1/1) ... [2021-11-13 18:25:52,382 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:25:51" (1/1) ... [2021-11-13 18:25:52,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:25:51" (1/1) ... [2021-11-13 18:25:52,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:25:51" (1/1) ... [2021-11-13 18:25:52,619 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:25:51" (1/1) ... [2021-11-13 18:25:52,723 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:25:51" (1/1) ... [2021-11-13 18:25:52,785 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:25:51" (1/1) ... [2021-11-13 18:25:52,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:25:52,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:25:52,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:25:52,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:25:52,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:25:51" (1/1) ... [2021-11-13 18:25:52,937 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:25:52,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:25:52,963 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:25:53,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:25:53,069 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:25:53,069 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:25:53,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:25:53,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:25:57,974 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:25:57,974 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:25:57,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:25:57 BoogieIcfgContainer [2021-11-13 18:25:57,995 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:25:57,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:25:57,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:25:58,014 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:25:58,014 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:25:49" (1/3) ... [2021-11-13 18:25:58,015 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f08a62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:25:58, skipping insertion in model container [2021-11-13 18:25:58,015 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:25:51" (2/3) ... [2021-11-13 18:25:58,016 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69f08a62 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:25:58, skipping insertion in model container [2021-11-13 18:25:58,016 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:25:57" (3/3) ... [2021-11-13 18:25:58,017 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem12_label30.c [2021-11-13 18:25:58,023 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:25:58,023 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:25:58,109 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:25:58,116 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 [2021-11-13 18:25:58,117 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:25:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:25:58,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-13 18:25:58,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:25:58,166 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] [2021-11-13 18:25:58,166 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:25:58,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:25:58,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1225036359, now seen corresponding path program 1 times [2021-11-13 18:25:58,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:25:58,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951392987] [2021-11-13 18:25:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:25:58,184 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:25:58,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:25:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:25:58,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:25:58,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951392987] [2021-11-13 18:25:58,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951392987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:25:58,419 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:25:58,419 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:25:58,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658460436] [2021-11-13 18:25:58,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:25:58,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:25:58,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:25:58,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:25:58,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:25:58,459 INFO L87 Difference]: Start difference. First operand has 818 states, 816 states have (on average 1.9178921568627452) internal successors, (1565), 817 states have internal predecessors, (1565), 0 states have call successors, (0), 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 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:03,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:03,100 INFO L93 Difference]: Finished difference Result 2404 states and 4645 transitions. [2021-11-13 18:26:03,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:26:03,103 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 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 25 [2021-11-13 18:26:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:03,134 INFO L225 Difference]: With dead ends: 2404 [2021-11-13 18:26:03,135 INFO L226 Difference]: Without dead ends: 1506 [2021-11-13 18:26:03,143 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 [2021-11-13 18:26:03,147 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 795 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 2337 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3664.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 795 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 3033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 36.32ms SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4433.32ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:03,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [795 Valid, 525 Invalid, 3033 Unknown, 0 Unchecked, 36.32ms Time], IncrementalHoareTripleChecker [696 Valid, 2337 Invalid, 0 Unknown, 0 Unchecked, 4433.32ms Time] [2021-11-13 18:26:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1506 states. [2021-11-13 18:26:03,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1506 to 1506. [2021-11-13 18:26:03,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1506 states, 1505 states have (on average 1.6066445182724252) internal successors, (2418), 1505 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:03,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1506 states to 1506 states and 2418 transitions. [2021-11-13 18:26:03,300 INFO L78 Accepts]: Start accepts. Automaton has 1506 states and 2418 transitions. Word has length 25 [2021-11-13 18:26:03,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:03,301 INFO L470 AbstractCegarLoop]: Abstraction has 1506 states and 2418 transitions. [2021-11-13 18:26:03,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:03,301 INFO L276 IsEmpty]: Start isEmpty. Operand 1506 states and 2418 transitions. [2021-11-13 18:26:03,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-13 18:26:03,308 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:03,309 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:03,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:26:03,310 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:03,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:03,314 INFO L85 PathProgramCache]: Analyzing trace with hash 778936309, now seen corresponding path program 1 times [2021-11-13 18:26:03,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:03,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71857997] [2021-11-13 18:26:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:03,315 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:03,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:03,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:03,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71857997] [2021-11-13 18:26:03,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71857997] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:03,575 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:03,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:26:03,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251698985] [2021-11-13 18:26:03,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:03,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:26:03,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:03,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:26:03,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:26:03,578 INFO L87 Difference]: Start difference. First operand 1506 states and 2418 transitions. Second operand has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:07,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:07,303 INFO L93 Difference]: Finished difference Result 4512 states and 7249 transitions. [2021-11-13 18:26:07,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:26:07,303 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 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 100 [2021-11-13 18:26:07,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:07,322 INFO L225 Difference]: With dead ends: 4512 [2021-11-13 18:26:07,323 INFO L226 Difference]: Without dead ends: 3008 [2021-11-13 18:26:07,333 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 [2021-11-13 18:26:07,335 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 774 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1995 mSolverCounterSat, 935 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2973.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 774 SdHoareTripleChecker+Valid, 449 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 23.54ms SdHoareTripleChecker+Time, 935 IncrementalHoareTripleChecker+Valid, 1995 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3563.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:07,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [774 Valid, 449 Invalid, 2930 Unknown, 0 Unchecked, 23.54ms Time], IncrementalHoareTripleChecker [935 Valid, 1995 Invalid, 0 Unknown, 0 Unchecked, 3563.48ms Time] [2021-11-13 18:26:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3008 states. [2021-11-13 18:26:07,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3008 to 3008. [2021-11-13 18:26:07,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3008 states, 3007 states have (on average 1.4156967076820752) internal successors, (4257), 3007 states have internal predecessors, (4257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:07,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3008 states to 3008 states and 4257 transitions. [2021-11-13 18:26:07,427 INFO L78 Accepts]: Start accepts. Automaton has 3008 states and 4257 transitions. Word has length 100 [2021-11-13 18:26:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:07,430 INFO L470 AbstractCegarLoop]: Abstraction has 3008 states and 4257 transitions. [2021-11-13 18:26:07,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.333333333333336) internal successors, (100), 2 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:07,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3008 states and 4257 transitions. [2021-11-13 18:26:07,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-13 18:26:07,438 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:07,438 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:07,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:26:07,439 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:07,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:07,441 INFO L85 PathProgramCache]: Analyzing trace with hash 601923994, now seen corresponding path program 1 times [2021-11-13 18:26:07,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:07,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868358286] [2021-11-13 18:26:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:07,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:07,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:07,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:07,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:07,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868358286] [2021-11-13 18:26:07,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868358286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:07,638 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:07,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:26:07,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514598554] [2021-11-13 18:26:07,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:07,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:26:07,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:07,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:26:07,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:26:07,641 INFO L87 Difference]: Start difference. First operand 3008 states and 4257 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:13,511 INFO L93 Difference]: Finished difference Result 9769 states and 13601 transitions. [2021-11-13 18:26:13,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:26:13,512 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-11-13 18:26:13,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:13,550 INFO L225 Difference]: With dead ends: 9769 [2021-11-13 18:26:13,551 INFO L226 Difference]: Without dead ends: 6763 [2021-11-13 18:26:13,555 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 [2021-11-13 18:26:13,556 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 2182 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 4712 mSolverCounterSat, 747 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4706.55ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2182 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 5459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.74ms SdHoareTripleChecker+Time, 747 IncrementalHoareTripleChecker+Valid, 4712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5615.97ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:13,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2182 Valid, 164 Invalid, 5459 Unknown, 0 Unchecked, 33.74ms Time], IncrementalHoareTripleChecker [747 Valid, 4712 Invalid, 0 Unknown, 0 Unchecked, 5615.97ms Time] [2021-11-13 18:26:13,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6763 states. [2021-11-13 18:26:13,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6763 to 6763. [2021-11-13 18:26:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 1.3510795622596865) internal successors, (9136), 6762 states have internal predecessors, (9136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:13,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 9136 transitions. [2021-11-13 18:26:13,735 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 9136 transitions. Word has length 102 [2021-11-13 18:26:13,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:13,736 INFO L470 AbstractCegarLoop]: Abstraction has 6763 states and 9136 transitions. [2021-11-13 18:26:13,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:13,737 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 9136 transitions. [2021-11-13 18:26:13,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-13 18:26:13,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:13,748 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:13,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:26:13,749 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:13,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:13,751 INFO L85 PathProgramCache]: Analyzing trace with hash -888170950, now seen corresponding path program 1 times [2021-11-13 18:26:13,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:13,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623905994] [2021-11-13 18:26:13,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:13,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:13,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:13,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623905994] [2021-11-13 18:26:13,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623905994] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:26:13,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564117589] [2021-11-13 18:26:13,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:13,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:26:13,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:26:13,915 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:26:13,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:26:14,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:14,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:26:14,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:26:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-13 18:26:14,520 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:26:14,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564117589] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:14,521 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:26:14,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2021-11-13 18:26:14,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427627756] [2021-11-13 18:26:14,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:14,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:26:14,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:14,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:26:14,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:26:14,527 INFO L87 Difference]: Start difference. First operand 6763 states and 9136 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:17,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:17,691 INFO L93 Difference]: Finished difference Result 15777 states and 21149 transitions. [2021-11-13 18:26:17,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:26:17,692 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 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 166 [2021-11-13 18:26:17,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:17,754 INFO L225 Difference]: With dead ends: 15777 [2021-11-13 18:26:17,755 INFO L226 Difference]: Without dead ends: 9767 [2021-11-13 18:26:17,763 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:26:17,765 INFO L933 BasicCegarLoop]: 149 mSDtfsCounter, 716 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2395 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2513.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 716 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 2851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.59ms SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 2395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3027.48ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:17,766 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [716 Valid, 156 Invalid, 2851 Unknown, 0 Unchecked, 16.59ms Time], IncrementalHoareTripleChecker [456 Valid, 2395 Invalid, 0 Unknown, 0 Unchecked, 3027.48ms Time] [2021-11-13 18:26:17,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9767 states. [2021-11-13 18:26:17,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9767 to 9767. [2021-11-13 18:26:18,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9767 states, 9766 states have (on average 1.255785377841491) internal successors, (12264), 9766 states have internal predecessors, (12264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:18,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9767 states to 9767 states and 12264 transitions. [2021-11-13 18:26:18,047 INFO L78 Accepts]: Start accepts. Automaton has 9767 states and 12264 transitions. Word has length 166 [2021-11-13 18:26:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:18,049 INFO L470 AbstractCegarLoop]: Abstraction has 9767 states and 12264 transitions. [2021-11-13 18:26:18,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 2 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:18,050 INFO L276 IsEmpty]: Start isEmpty. Operand 9767 states and 12264 transitions. [2021-11-13 18:26:18,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-13 18:26:18,053 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:18,053 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:18,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 18:26:18,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:26:18,276 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:18,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:18,276 INFO L85 PathProgramCache]: Analyzing trace with hash -764569624, now seen corresponding path program 1 times [2021-11-13 18:26:18,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:18,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036484913] [2021-11-13 18:26:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:18,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 115 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:26:18,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:18,461 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036484913] [2021-11-13 18:26:18,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036484913] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:18,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:18,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:26:18,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423303576] [2021-11-13 18:26:18,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:18,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:26:18,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:18,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:26:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:26:18,464 INFO L87 Difference]: Start difference. First operand 9767 states and 12264 transitions. Second operand has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:21,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:21,718 INFO L93 Difference]: Finished difference Result 21822 states and 27290 transitions. [2021-11-13 18:26:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:26:21,720 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-11-13 18:26:21,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:21,783 INFO L225 Difference]: With dead ends: 21822 [2021-11-13 18:26:21,784 INFO L226 Difference]: Without dead ends: 12771 [2021-11-13 18:26:21,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:26:21,796 INFO L933 BasicCegarLoop]: 598 mSDtfsCounter, 704 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 3049 mSolverCounterSat, 266 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2585.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 612 SdHoareTripleChecker+Invalid, 3315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.18ms SdHoareTripleChecker+Time, 266 IncrementalHoareTripleChecker+Valid, 3049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3110.87ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:21,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 612 Invalid, 3315 Unknown, 0 Unchecked, 12.18ms Time], IncrementalHoareTripleChecker [266 Valid, 3049 Invalid, 0 Unknown, 0 Unchecked, 3110.87ms Time] [2021-11-13 18:26:21,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2021-11-13 18:26:22,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 12020. [2021-11-13 18:26:22,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.2085032032615026) internal successors, (14525), 12019 states have internal predecessors, (14525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:22,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 14525 transitions. [2021-11-13 18:26:22,076 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 14525 transitions. Word has length 173 [2021-11-13 18:26:22,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:22,077 INFO L470 AbstractCegarLoop]: Abstraction has 12020 states and 14525 transitions. [2021-11-13 18:26:22,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.25) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:22,086 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 14525 transitions. [2021-11-13 18:26:22,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-13 18:26:22,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:22,092 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:22,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 18:26:22,092 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:22,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:22,093 INFO L85 PathProgramCache]: Analyzing trace with hash 289070346, now seen corresponding path program 1 times [2021-11-13 18:26:22,093 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:22,093 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217892908] [2021-11-13 18:26:22,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:22,094 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:22,277 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-13 18:26:22,277 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:22,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217892908] [2021-11-13 18:26:22,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217892908] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:22,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:22,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:26:22,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159727231] [2021-11-13 18:26:22,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:22,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:26:22,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:22,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:26:22,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:26:22,280 INFO L87 Difference]: Start difference. First operand 12020 states and 14525 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:25,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:25,752 INFO L93 Difference]: Finished difference Result 27793 states and 34552 transitions. [2021-11-13 18:26:25,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:26:25,762 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2021-11-13 18:26:25,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:25,800 INFO L225 Difference]: With dead ends: 27793 [2021-11-13 18:26:25,801 INFO L226 Difference]: Without dead ends: 16526 [2021-11-13 18:26:25,815 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 [2021-11-13 18:26:25,817 INFO L933 BasicCegarLoop]: 488 mSDtfsCounter, 761 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2728.94ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 761 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.29ms SdHoareTripleChecker+Time, 626 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3303.09ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:25,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [761 Valid, 495 Invalid, 2844 Unknown, 0 Unchecked, 13.29ms Time], IncrementalHoareTripleChecker [626 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 3303.09ms Time] [2021-11-13 18:26:25,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16526 states. [2021-11-13 18:26:26,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16526 to 12020. [2021-11-13 18:26:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12020 states, 12019 states have (on average 1.2085032032615026) internal successors, (14525), 12019 states have internal predecessors, (14525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12020 states to 12020 states and 14525 transitions. [2021-11-13 18:26:26,160 INFO L78 Accepts]: Start accepts. Automaton has 12020 states and 14525 transitions. Word has length 237 [2021-11-13 18:26:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:26,161 INFO L470 AbstractCegarLoop]: Abstraction has 12020 states and 14525 transitions. [2021-11-13 18:26:26,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:26,161 INFO L276 IsEmpty]: Start isEmpty. Operand 12020 states and 14525 transitions. [2021-11-13 18:26:26,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-13 18:26:26,165 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:26,165 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:26,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:26:26,166 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:26,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:26,168 INFO L85 PathProgramCache]: Analyzing trace with hash 478547313, now seen corresponding path program 1 times [2021-11-13 18:26:26,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:26,168 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196919535] [2021-11-13 18:26:26,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:26,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2021-11-13 18:26:26,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:26,335 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196919535] [2021-11-13 18:26:26,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196919535] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:26,335 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:26,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:26:26,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177088431] [2021-11-13 18:26:26,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:26,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:26:26,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:26:26,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:26:26,337 INFO L87 Difference]: Start difference. First operand 12020 states and 14525 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:29,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:29,534 INFO L93 Difference]: Finished difference Result 31550 states and 38845 transitions. [2021-11-13 18:26:29,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:26:29,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-13 18:26:29,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:29,573 INFO L225 Difference]: With dead ends: 31550 [2021-11-13 18:26:29,574 INFO L226 Difference]: Without dead ends: 20283 [2021-11-13 18:26:29,588 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 [2021-11-13 18:26:29,589 INFO L933 BasicCegarLoop]: 305 mSDtfsCounter, 848 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 466 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2469.52ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 2775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.13ms SdHoareTripleChecker+Time, 466 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3029.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:29,590 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [848 Valid, 312 Invalid, 2775 Unknown, 0 Unchecked, 11.13ms Time], IncrementalHoareTripleChecker [466 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 3029.38ms Time] [2021-11-13 18:26:29,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20283 states. [2021-11-13 18:26:29,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20283 to 18779. [2021-11-13 18:26:29,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18779 states, 18778 states have (on average 1.1888380019171372) internal successors, (22324), 18778 states have internal predecessors, (22324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:30,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18779 states to 18779 states and 22324 transitions. [2021-11-13 18:26:30,024 INFO L78 Accepts]: Start accepts. Automaton has 18779 states and 22324 transitions. Word has length 238 [2021-11-13 18:26:30,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:30,024 INFO L470 AbstractCegarLoop]: Abstraction has 18779 states and 22324 transitions. [2021-11-13 18:26:30,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 2 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:30,025 INFO L276 IsEmpty]: Start isEmpty. Operand 18779 states and 22324 transitions. [2021-11-13 18:26:30,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-11-13 18:26:30,031 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:30,031 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:30,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:26:30,031 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:30,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:30,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1542873532, now seen corresponding path program 1 times [2021-11-13 18:26:30,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:30,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558519606] [2021-11-13 18:26:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:30,033 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:30,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:30,180 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 205 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 18:26:30,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:30,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558519606] [2021-11-13 18:26:30,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558519606] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:30,181 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:30,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:26:30,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149382897] [2021-11-13 18:26:30,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:30,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:26:30,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:30,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:26:30,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:26:30,184 INFO L87 Difference]: Start difference. First operand 18779 states and 22324 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:33,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:33,267 INFO L93 Difference]: Finished difference Result 43564 states and 53013 transitions. [2021-11-13 18:26:33,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:26:33,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 324 [2021-11-13 18:26:33,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:33,312 INFO L225 Difference]: With dead ends: 43564 [2021-11-13 18:26:33,313 INFO L226 Difference]: Without dead ends: 25538 [2021-11-13 18:26:33,333 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 [2021-11-13 18:26:33,334 INFO L933 BasicCegarLoop]: 1208 mSDtfsCounter, 704 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2254 mSolverCounterSat, 439 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2371.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 1216 SdHoareTripleChecker+Invalid, 2693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.95ms SdHoareTripleChecker+Time, 439 IncrementalHoareTripleChecker+Valid, 2254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2882.78ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:33,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [704 Valid, 1216 Invalid, 2693 Unknown, 0 Unchecked, 10.95ms Time], IncrementalHoareTripleChecker [439 Valid, 2254 Invalid, 0 Unknown, 0 Unchecked, 2882.78ms Time] [2021-11-13 18:26:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25538 states. [2021-11-13 18:26:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25538 to 24036. [2021-11-13 18:26:33,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24036 states, 24035 states have (on average 1.1785313085084252) internal successors, (28326), 24035 states have internal predecessors, (28326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24036 states to 24036 states and 28326 transitions. [2021-11-13 18:26:33,813 INFO L78 Accepts]: Start accepts. Automaton has 24036 states and 28326 transitions. Word has length 324 [2021-11-13 18:26:33,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:33,814 INFO L470 AbstractCegarLoop]: Abstraction has 24036 states and 28326 transitions. [2021-11-13 18:26:33,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:33,814 INFO L276 IsEmpty]: Start isEmpty. Operand 24036 states and 28326 transitions. [2021-11-13 18:26:33,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-13 18:26:33,823 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:33,824 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:33,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:26:33,824 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:33,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:33,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1226856098, now seen corresponding path program 1 times [2021-11-13 18:26:33,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:33,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585401343] [2021-11-13 18:26:33,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:33,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 298 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 18:26:34,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:34,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585401343] [2021-11-13 18:26:34,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585401343] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:34,009 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:34,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:26:34,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595677356] [2021-11-13 18:26:34,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:34,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:26:34,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:34,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:26:34,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:26:34,015 INFO L87 Difference]: Start difference. First operand 24036 states and 28326 transitions. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:37,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:37,575 INFO L93 Difference]: Finished difference Result 60837 states and 71503 transitions. [2021-11-13 18:26:37,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:26:37,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 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 352 [2021-11-13 18:26:37,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:37,635 INFO L225 Difference]: With dead ends: 60837 [2021-11-13 18:26:37,636 INFO L226 Difference]: Without dead ends: 37554 [2021-11-13 18:26:37,658 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 [2021-11-13 18:26:37,660 INFO L933 BasicCegarLoop]: 1239 mSDtfsCounter, 635 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2710.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 2958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 14.40ms SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3289.89ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:37,661 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 1247 Invalid, 2958 Unknown, 0 Unchecked, 14.40ms Time], IncrementalHoareTripleChecker [333 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 3289.89ms Time] [2021-11-13 18:26:37,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37554 states. [2021-11-13 18:26:38,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37554 to 35301. [2021-11-13 18:26:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35301 states, 35300 states have (on average 1.1668555240793201) internal successors, (41190), 35300 states have internal predecessors, (41190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:38,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35301 states to 35301 states and 41190 transitions. [2021-11-13 18:26:38,335 INFO L78 Accepts]: Start accepts. Automaton has 35301 states and 41190 transitions. Word has length 352 [2021-11-13 18:26:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:38,335 INFO L470 AbstractCegarLoop]: Abstraction has 35301 states and 41190 transitions. [2021-11-13 18:26:38,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:38,336 INFO L276 IsEmpty]: Start isEmpty. Operand 35301 states and 41190 transitions. [2021-11-13 18:26:38,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2021-11-13 18:26:38,345 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:38,346 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:38,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:26:38,346 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:38,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:38,347 INFO L85 PathProgramCache]: Analyzing trace with hash -733385364, now seen corresponding path program 1 times [2021-11-13 18:26:38,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:38,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217441871] [2021-11-13 18:26:38,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:38,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-13 18:26:38,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:38,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217441871] [2021-11-13 18:26:38,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217441871] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:38,513 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:38,513 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:26:38,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321221260] [2021-11-13 18:26:38,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:38,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:26:38,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:38,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:26:38,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:26:38,515 INFO L87 Difference]: Start difference. First operand 35301 states and 41190 transitions. Second operand has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:42,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:42,088 INFO L93 Difference]: Finished difference Result 102893 states and 120518 transitions. [2021-11-13 18:26:42,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:26:42,089 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 356 [2021-11-13 18:26:42,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:42,180 INFO L225 Difference]: With dead ends: 102893 [2021-11-13 18:26:42,181 INFO L226 Difference]: Without dead ends: 63839 [2021-11-13 18:26:42,207 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 [2021-11-13 18:26:42,207 INFO L933 BasicCegarLoop]: 1307 mSDtfsCounter, 768 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2234 mSolverCounterSat, 620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2657.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 768 SdHoareTripleChecker+Valid, 1315 SdHoareTripleChecker+Invalid, 2854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.69ms SdHoareTripleChecker+Time, 620 IncrementalHoareTripleChecker+Valid, 2234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3216.16ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:42,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [768 Valid, 1315 Invalid, 2854 Unknown, 0 Unchecked, 10.69ms Time], IncrementalHoareTripleChecker [620 Valid, 2234 Invalid, 0 Unknown, 0 Unchecked, 3216.16ms Time] [2021-11-13 18:26:42,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63839 states. [2021-11-13 18:26:43,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63839 to 53325. [2021-11-13 18:26:43,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53325 states, 53324 states have (on average 1.1311416997974646) internal successors, (60317), 53324 states have internal predecessors, (60317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:43,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53325 states to 53325 states and 60317 transitions. [2021-11-13 18:26:43,324 INFO L78 Accepts]: Start accepts. Automaton has 53325 states and 60317 transitions. Word has length 356 [2021-11-13 18:26:43,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:43,325 INFO L470 AbstractCegarLoop]: Abstraction has 53325 states and 60317 transitions. [2021-11-13 18:26:43,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 57.666666666666664) internal successors, (173), 3 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:43,326 INFO L276 IsEmpty]: Start isEmpty. Operand 53325 states and 60317 transitions. [2021-11-13 18:26:43,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2021-11-13 18:26:43,337 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:43,337 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:43,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:26:43,338 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:43,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:43,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1665703124, now seen corresponding path program 1 times [2021-11-13 18:26:43,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:43,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068586107] [2021-11-13 18:26:43,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:43,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:43,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 344 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-13 18:26:43,517 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:43,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068586107] [2021-11-13 18:26:43,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068586107] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:43,518 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:43,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:26:43,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287597518] [2021-11-13 18:26:43,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:43,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:26:43,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:43,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:26:43,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:26:43,521 INFO L87 Difference]: Start difference. First operand 53325 states and 60317 transitions. Second operand has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:46,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:46,965 INFO L93 Difference]: Finished difference Result 135186 states and 154639 transitions. [2021-11-13 18:26:46,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:26:46,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 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 363 [2021-11-13 18:26:46,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:47,054 INFO L225 Difference]: With dead ends: 135186 [2021-11-13 18:26:47,054 INFO L226 Difference]: Without dead ends: 82614 [2021-11-13 18:26:47,081 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 [2021-11-13 18:26:47,082 INFO L933 BasicCegarLoop]: 1228 mSDtfsCounter, 720 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2115 mSolverCounterSat, 696 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2272.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 2811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.68ms SdHoareTripleChecker+Time, 696 IncrementalHoareTripleChecker+Valid, 2115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2783.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:47,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 1236 Invalid, 2811 Unknown, 0 Unchecked, 8.68ms Time], IncrementalHoareTripleChecker [696 Valid, 2115 Invalid, 0 Unknown, 0 Unchecked, 2783.21ms Time] [2021-11-13 18:26:47,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82614 states. [2021-11-13 18:26:48,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82614 to 76606. [2021-11-13 18:26:48,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76606 states, 76605 states have (on average 1.1163762156517198) internal successors, (85520), 76605 states have internal predecessors, (85520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:48,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76606 states to 76606 states and 85520 transitions. [2021-11-13 18:26:48,204 INFO L78 Accepts]: Start accepts. Automaton has 76606 states and 85520 transitions. Word has length 363 [2021-11-13 18:26:48,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:48,205 INFO L470 AbstractCegarLoop]: Abstraction has 76606 states and 85520 transitions. [2021-11-13 18:26:48,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.33333333333333) internal successors, (280), 3 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 76606 states and 85520 transitions. [2021-11-13 18:26:48,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2021-11-13 18:26:48,228 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:48,228 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:48,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:26:48,229 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:48,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:48,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1722659600, now seen corresponding path program 1 times [2021-11-13 18:26:48,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:48,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527757304] [2021-11-13 18:26:48,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:48,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:48,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:48,475 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-11-13 18:26:48,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:48,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527757304] [2021-11-13 18:26:48,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527757304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:48,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:48,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:26:48,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361725923] [2021-11-13 18:26:48,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:48,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:26:48,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:48,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:26:48,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:26:48,479 INFO L87 Difference]: Start difference. First operand 76606 states and 85520 transitions. Second operand has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:52,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:52,228 INFO L93 Difference]: Finished difference Result 187005 states and 210407 transitions. [2021-11-13 18:26:52,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:26:52,228 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 460 [2021-11-13 18:26:52,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:52,345 INFO L225 Difference]: With dead ends: 187005 [2021-11-13 18:26:52,346 INFO L226 Difference]: Without dead ends: 111152 [2021-11-13 18:26:52,561 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 [2021-11-13 18:26:52,575 INFO L933 BasicCegarLoop]: 1288 mSDtfsCounter, 741 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 522 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2479.25ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 1296 SdHoareTripleChecker+Invalid, 2850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.51ms SdHoareTripleChecker+Time, 522 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3239.37ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:52,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [741 Valid, 1296 Invalid, 2850 Unknown, 0 Unchecked, 8.51ms Time], IncrementalHoareTripleChecker [522 Valid, 2328 Invalid, 0 Unknown, 0 Unchecked, 3239.37ms Time] [2021-11-13 18:26:52,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111152 states. [2021-11-13 18:26:53,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111152 to 99136. [2021-11-13 18:26:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99136 states, 99135 states have (on average 1.1063095778483885) internal successors, (109674), 99135 states have internal predecessors, (109674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:53,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99136 states to 99136 states and 109674 transitions. [2021-11-13 18:26:53,978 INFO L78 Accepts]: Start accepts. Automaton has 99136 states and 109674 transitions. Word has length 460 [2021-11-13 18:26:53,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:26:53,980 INFO L470 AbstractCegarLoop]: Abstraction has 99136 states and 109674 transitions. [2021-11-13 18:26:53,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:53,980 INFO L276 IsEmpty]: Start isEmpty. Operand 99136 states and 109674 transitions. [2021-11-13 18:26:54,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 736 [2021-11-13 18:26:54,351 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:26:54,352 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:26:54,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:26:54,352 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:26:54,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:26:54,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1800625400, now seen corresponding path program 1 times [2021-11-13 18:26:54,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:26:54,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232285776] [2021-11-13 18:26:54,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:26:54,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:26:54,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:26:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 402 proven. 0 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2021-11-13 18:26:54,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:26:54,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232285776] [2021-11-13 18:26:54,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232285776] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:26:54,838 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:26:54,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:26:54,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337583382] [2021-11-13 18:26:54,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:26:54,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:26:54,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:26:54,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:26:54,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:26:54,841 INFO L87 Difference]: Start difference. First operand 99136 states and 109674 transitions. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:26:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:26:58,446 INFO L93 Difference]: Finished difference Result 222302 states and 248518 transitions. [2021-11-13 18:26:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:26:58,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 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 735 [2021-11-13 18:26:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:26:58,567 INFO L225 Difference]: With dead ends: 222302 [2021-11-13 18:26:58,567 INFO L226 Difference]: Without dead ends: 123919 [2021-11-13 18:26:58,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:26:58,596 INFO L933 BasicCegarLoop]: 291 mSDtfsCounter, 748 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2035 mSolverCounterSat, 891 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2405.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 2926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.42ms SdHoareTripleChecker+Time, 891 IncrementalHoareTripleChecker+Valid, 2035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2901.52ms IncrementalHoareTripleChecker+Time [2021-11-13 18:26:58,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 297 Invalid, 2926 Unknown, 0 Unchecked, 7.42ms Time], IncrementalHoareTripleChecker [891 Valid, 2035 Invalid, 0 Unknown, 0 Unchecked, 2901.52ms Time] [2021-11-13 18:26:58,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123919 states. [2021-11-13 18:27:00,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123919 to 123168. [2021-11-13 18:27:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123168 states, 123167 states have (on average 1.1150714071139185) internal successors, (137340), 123167 states have internal predecessors, (137340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:00,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123168 states to 123168 states and 137340 transitions. [2021-11-13 18:27:00,591 INFO L78 Accepts]: Start accepts. Automaton has 123168 states and 137340 transitions. Word has length 735 [2021-11-13 18:27:00,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:00,592 INFO L470 AbstractCegarLoop]: Abstraction has 123168 states and 137340 transitions. [2021-11-13 18:27:00,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:00,593 INFO L276 IsEmpty]: Start isEmpty. Operand 123168 states and 137340 transitions. [2021-11-13 18:27:00,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2021-11-13 18:27:00,667 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:00,669 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:00,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:27:00,669 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:00,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:00,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1748883327, now seen corresponding path program 1 times [2021-11-13 18:27:00,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:00,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005443858] [2021-11-13 18:27:00,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:00,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:01,017 INFO L134 CoverageAnalysis]: Checked inductivity of 779 backedges. 640 proven. 0 refuted. 0 times theorem prover too weak. 139 trivial. 0 not checked. [2021-11-13 18:27:01,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:01,018 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005443858] [2021-11-13 18:27:01,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005443858] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:01,018 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:01,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:01,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694423758] [2021-11-13 18:27:01,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:01,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:01,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:01,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:01,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:01,021 INFO L87 Difference]: Start difference. First operand 123168 states and 137340 transitions. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:04,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:04,554 INFO L93 Difference]: Finished difference Result 245583 states and 273922 transitions. [2021-11-13 18:27:04,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:04,555 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 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 754 [2021-11-13 18:27:04,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:04,997 INFO L225 Difference]: With dead ends: 245583 [2021-11-13 18:27:04,997 INFO L226 Difference]: Without dead ends: 123168 [2021-11-13 18:27:05,042 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 [2021-11-13 18:27:05,042 INFO L933 BasicCegarLoop]: 1262 mSDtfsCounter, 405 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 2228 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2183.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1270 SdHoareTripleChecker+Invalid, 2662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.93ms SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 2228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2668.44ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:05,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [405 Valid, 1270 Invalid, 2662 Unknown, 0 Unchecked, 7.93ms Time], IncrementalHoareTripleChecker [434 Valid, 2228 Invalid, 0 Unknown, 0 Unchecked, 2668.44ms Time] [2021-11-13 18:27:05,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123168 states. [2021-11-13 18:27:06,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123168 to 120915. [2021-11-13 18:27:06,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120915 states, 120914 states have (on average 1.0836048761929966) internal successors, (131023), 120914 states have internal predecessors, (131023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:07,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120915 states to 120915 states and 131023 transitions. [2021-11-13 18:27:07,070 INFO L78 Accepts]: Start accepts. Automaton has 120915 states and 131023 transitions. Word has length 754 [2021-11-13 18:27:07,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:07,071 INFO L470 AbstractCegarLoop]: Abstraction has 120915 states and 131023 transitions. [2021-11-13 18:27:07,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:07,072 INFO L276 IsEmpty]: Start isEmpty. Operand 120915 states and 131023 transitions. [2021-11-13 18:27:07,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2021-11-13 18:27:07,103 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:07,104 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:07,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:27:07,105 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:07,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:07,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1039376707, now seen corresponding path program 1 times [2021-11-13 18:27:07,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:07,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177123269] [2021-11-13 18:27:07,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:07,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:07,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:07,432 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 655 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2021-11-13 18:27:07,432 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:07,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177123269] [2021-11-13 18:27:07,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177123269] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:07,432 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:07,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:27:07,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703620433] [2021-11-13 18:27:07,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:07,436 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:27:07,436 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:07,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:27:07,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:27:07,437 INFO L87 Difference]: Start difference. First operand 120915 states and 131023 transitions. Second operand has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:11,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:11,276 INFO L93 Difference]: Finished difference Result 255346 states and 275996 transitions. [2021-11-13 18:27:11,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:27:11,277 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 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 769 [2021-11-13 18:27:11,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:11,416 INFO L225 Difference]: With dead ends: 255346 [2021-11-13 18:27:11,416 INFO L226 Difference]: Without dead ends: 135184 [2021-11-13 18:27:11,465 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 [2021-11-13 18:27:11,465 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 449 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2257 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2390.95ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 449 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.98ms SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 2257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2888.21ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:11,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [449 Valid, 202 Invalid, 2921 Unknown, 0 Unchecked, 8.98ms Time], IncrementalHoareTripleChecker [664 Valid, 2257 Invalid, 0 Unknown, 0 Unchecked, 2888.21ms Time] [2021-11-13 18:27:11,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135184 states. [2021-11-13 18:27:13,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135184 to 123168. [2021-11-13 18:27:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123168 states, 123167 states have (on average 1.0769524304399718) internal successors, (132645), 123167 states have internal predecessors, (132645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:13,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123168 states to 123168 states and 132645 transitions. [2021-11-13 18:27:13,503 INFO L78 Accepts]: Start accepts. Automaton has 123168 states and 132645 transitions. Word has length 769 [2021-11-13 18:27:13,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:13,504 INFO L470 AbstractCegarLoop]: Abstraction has 123168 states and 132645 transitions. [2021-11-13 18:27:13,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 204.33333333333334) internal successors, (613), 3 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:13,504 INFO L276 IsEmpty]: Start isEmpty. Operand 123168 states and 132645 transitions. [2021-11-13 18:27:13,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 770 [2021-11-13 18:27:13,551 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:13,552 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:13,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:27:13,552 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:13,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:13,553 INFO L85 PathProgramCache]: Analyzing trace with hash -404829369, now seen corresponding path program 1 times [2021-11-13 18:27:13,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:13,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157898739] [2021-11-13 18:27:13,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:13,554 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:14,375 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 445 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:27:14,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:14,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157898739] [2021-11-13 18:27:14,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157898739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:14,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:27:14,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 18:27:14,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198866425] [2021-11-13 18:27:14,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:14,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-13 18:27:14,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:14,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-13 18:27:14,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-11-13 18:27:14,378 INFO L87 Difference]: Start difference. First operand 123168 states and 132645 transitions. Second operand has 8 states, 8 states have (on average 96.125) internal successors, (769), 7 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:28,197 INFO L93 Difference]: Finished difference Result 301885 states and 324235 transitions. [2021-11-13 18:27:28,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-13 18:27:28,197 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 96.125) internal successors, (769), 7 states have internal predecessors, (769), 0 states have call successors, (0), 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 769 [2021-11-13 18:27:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:28,406 INFO L225 Difference]: With dead ends: 301885 [2021-11-13 18:27:28,406 INFO L226 Difference]: Without dead ends: 179470 [2021-11-13 18:27:28,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-11-13 18:27:28,461 INFO L933 BasicCegarLoop]: 454 mSDtfsCounter, 4714 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 14396 mSolverCounterSat, 1154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9995.90ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4714 SdHoareTripleChecker+Valid, 791 SdHoareTripleChecker+Invalid, 15550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.69ms SdHoareTripleChecker+Time, 1154 IncrementalHoareTripleChecker+Valid, 14396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12220.19ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:28,461 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4714 Valid, 791 Invalid, 15550 Unknown, 0 Unchecked, 51.69ms Time], IncrementalHoareTripleChecker [1154 Valid, 14396 Invalid, 0 Unknown, 0 Unchecked, 12220.19ms Time] [2021-11-13 18:27:28,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179470 states. [2021-11-13 18:27:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179470 to 163781. [2021-11-13 18:27:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163781 states, 163780 states have (on average 1.0762852607155942) internal successors, (176274), 163780 states have internal predecessors, (176274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163781 states to 163781 states and 176274 transitions. [2021-11-13 18:27:31,312 INFO L78 Accepts]: Start accepts. Automaton has 163781 states and 176274 transitions. Word has length 769 [2021-11-13 18:27:31,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:27:31,313 INFO L470 AbstractCegarLoop]: Abstraction has 163781 states and 176274 transitions. [2021-11-13 18:27:31,314 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 96.125) internal successors, (769), 7 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:31,314 INFO L276 IsEmpty]: Start isEmpty. Operand 163781 states and 176274 transitions. [2021-11-13 18:27:31,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 793 [2021-11-13 18:27:31,381 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:27:31,382 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:27:31,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:27:31,382 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:27:31,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:27:31,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1194585177, now seen corresponding path program 1 times [2021-11-13 18:27:31,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:27:31,384 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069446906] [2021-11-13 18:27:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:31,384 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:27:31,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:31,841 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 415 proven. 54 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 18:27:31,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:27:31,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069446906] [2021-11-13 18:27:31,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069446906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:27:31,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279441810] [2021-11-13 18:27:31,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:27:31,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:27:31,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:27:31,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:27:31,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_126ef5ff-512b-4c0b-bfc8-68ff5a32a18a/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:27:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:27:32,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 18:27:32,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:27:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 424 trivial. 0 not checked. [2021-11-13 18:27:34,917 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:27:34,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279441810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:27:34,918 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:27:34,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-13 18:27:34,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835869342] [2021-11-13 18:27:34,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:27:34,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:27:34,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:27:34,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:27:34,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:27:34,921 INFO L87 Difference]: Start difference. First operand 163781 states and 176274 transitions. Second operand has 4 states, 4 states have (on average 127.5) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:27:41,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:27:41,873 INFO L93 Difference]: Finished difference Result 493786 states and 532612 transitions. [2021-11-13 18:27:41,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:27:41,873 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 127.5) internal successors, (510), 3 states have internal predecessors, (510), 0 states have call successors, (0), 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 792 [2021-11-13 18:27:41,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:27:42,859 INFO L225 Difference]: With dead ends: 493786 [2021-11-13 18:27:42,860 INFO L226 Difference]: Without dead ends: 330758 [2021-11-13 18:27:43,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 795 GetRequests, 790 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:27:43,029 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 1477 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 4743 mSolverCounterSat, 508 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4521.18ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 5251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.36ms SdHoareTripleChecker+Time, 508 IncrementalHoareTripleChecker+Valid, 4743 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5433.02ms IncrementalHoareTripleChecker+Time [2021-11-13 18:27:43,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 60 Invalid, 5251 Unknown, 0 Unchecked, 18.36ms Time], IncrementalHoareTripleChecker [508 Valid, 4743 Invalid, 0 Unknown, 0 Unchecked, 5433.02ms Time] [2021-11-13 18:27:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330758 states. [2021-11-13 18:27:47,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330758 to 328647. [2021-11-13 18:27:47,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328647 states, 328646 states have (on average 1.0763435429002635) internal successors, (353736), 328646 states have internal predecessors, (353736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)