./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label15.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_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/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_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label15.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/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_34a90b6c-f971-470b-823b-5d1ef6fadc68/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 a8ce96d555e872b609ed7174eef821f9a0406316106ba92ad582ec48aa272726 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 18:47:21,454 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 18:47:21,457 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 18:47:21,500 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 18:47:21,501 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 18:47:21,502 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 18:47:21,504 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 18:47:21,508 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 18:47:21,517 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 18:47:21,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 18:47:21,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 18:47:21,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 18:47:21,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 18:47:21,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 18:47:21,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 18:47:21,532 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 18:47:21,533 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 18:47:21,535 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 18:47:21,537 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 18:47:21,544 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 18:47:21,546 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 18:47:21,554 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 18:47:21,556 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 18:47:21,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 18:47:21,561 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 18:47:21,562 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 18:47:21,562 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 18:47:21,564 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 18:47:21,564 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 18:47:21,566 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 18:47:21,566 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 18:47:21,567 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 18:47:21,568 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 18:47:21,572 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 18:47:21,574 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 18:47:21,575 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 18:47:21,577 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 18:47:21,577 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 18:47:21,577 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 18:47:21,579 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 18:47:21,580 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 18:47:21,581 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 18:47:21,619 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 18:47:21,622 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 18:47:21,623 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 18:47:21,623 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 18:47:21,624 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 18:47:21,624 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 18:47:21,625 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 18:47:21,625 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 18:47:21,625 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 18:47:21,625 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 18:47:21,626 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 18:47:21,626 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 18:47:21,626 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 18:47:21,626 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 18:47:21,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 18:47:21,627 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 18:47:21,627 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 18:47:21,627 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 18:47:21,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 18:47:21,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 18:47:21,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 18:47:21,628 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 18:47:21,628 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 18:47:21,628 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 18:47:21,629 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:47:21,629 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 18:47:21,629 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 18:47:21,629 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 18:47:21,629 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 18:47:21,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 18:47:21,630 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 18:47:21,630 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 18:47:21,630 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 18:47:21,631 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 18:47:21,631 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_34a90b6c-f971-470b-823b-5d1ef6fadc68/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8ce96d555e872b609ed7174eef821f9a0406316106ba92ad582ec48aa272726 [2021-11-13 18:47:21,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 18:47:21,991 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 18:47:21,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 18:47:21,995 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 18:47:21,996 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 18:47:21,998 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/eca-rers2012/Problem17_label15.c [2021-11-13 18:47:22,090 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/data/6b2f1a763/04c3654681a142d4b33d47be0626d1c5/FLAG07e09d275 [2021-11-13 18:47:22,907 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 18:47:22,908 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/sv-benchmarks/c/eca-rers2012/Problem17_label15.c [2021-11-13 18:47:22,939 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/data/6b2f1a763/04c3654681a142d4b33d47be0626d1c5/FLAG07e09d275 [2021-11-13 18:47:23,453 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/data/6b2f1a763/04c3654681a142d4b33d47be0626d1c5 [2021-11-13 18:47:23,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 18:47:23,458 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 18:47:23,459 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 18:47:23,460 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 18:47:23,464 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 18:47:23,465 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:47:23" (1/1) ... [2021-11-13 18:47:23,466 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@187ffaf0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:47:23, skipping insertion in model container [2021-11-13 18:47:23,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 06:47:23" (1/1) ... [2021-11-13 18:47:23,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 18:47:23,556 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 18:47:23,873 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_34a90b6c-f971-470b-823b-5d1ef6fadc68/sv-benchmarks/c/eca-rers2012/Problem17_label15.c[5490,5503] [2021-11-13 18:47:24,617 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:47:24,628 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 18:47:24,670 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_34a90b6c-f971-470b-823b-5d1ef6fadc68/sv-benchmarks/c/eca-rers2012/Problem17_label15.c[5490,5503] [2021-11-13 18:47:25,239 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 18:47:25,260 INFO L208 MainTranslator]: Completed translation [2021-11-13 18:47:25,260 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:47:25 WrapperNode [2021-11-13 18:47:25,260 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 18:47:25,262 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 18:47:25,262 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 18:47:25,262 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 18:47:25,270 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:47:25" (1/1) ... [2021-11-13 18:47:25,360 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:47:25" (1/1) ... [2021-11-13 18:47:25,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 18:47:25,744 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 18:47:25,744 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 18:47:25,744 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 18:47:25,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:47:25" (1/1) ... [2021-11-13 18:47:25,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:47:25" (1/1) ... [2021-11-13 18:47:25,904 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:47:25" (1/1) ... [2021-11-13 18:47:25,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:47:25" (1/1) ... [2021-11-13 18:47:26,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:47:25" (1/1) ... [2021-11-13 18:47:26,310 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:47:25" (1/1) ... [2021-11-13 18:47:26,422 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:47:25" (1/1) ... [2021-11-13 18:47:26,521 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 18:47:26,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 18:47:26,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 18:47:26,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 18:47:26,526 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:47:25" (1/1) ... [2021-11-13 18:47:26,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 18:47:26,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:26,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 18:47:26,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 18:47:26,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 18:47:26,608 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 18:47:26,608 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 18:47:26,608 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 18:47:32,514 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 18:47:32,515 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-13 18:47:32,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:47:32 BoogieIcfgContainer [2021-11-13 18:47:32,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 18:47:32,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 18:47:32,522 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 18:47:32,526 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 18:47:32,526 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 06:47:23" (1/3) ... [2021-11-13 18:47:32,527 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aab54cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:47:32, skipping insertion in model container [2021-11-13 18:47:32,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 06:47:25" (2/3) ... [2021-11-13 18:47:32,528 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aab54cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 06:47:32, skipping insertion in model container [2021-11-13 18:47:32,528 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 06:47:32" (3/3) ... [2021-11-13 18:47:32,530 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label15.c [2021-11-13 18:47:32,537 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 18:47:32,537 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 18:47:32,603 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 18:47:32,613 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 18:47:32,613 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 18:47:32,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 18:47:32,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-13 18:47:32,660 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:32,671 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:32,671 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:32,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:32,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1318097310, now seen corresponding path program 1 times [2021-11-13 18:47:32,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:32,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430400178] [2021-11-13 18:47:32,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:32,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:32,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:33,069 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 18:47:33,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:33,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430400178] [2021-11-13 18:47:33,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430400178] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:47:33,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:47:33,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:47:33,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555168295] [2021-11-13 18:47:33,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:33,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:47:33,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:33,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:47:33,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:47:33,124 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 0 states have call successors, (0), 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 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 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 18:47:37,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:37,332 INFO L93 Difference]: Finished difference Result 1680 states and 3074 transitions. [2021-11-13 18:47:37,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:47:37,335 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 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 36 [2021-11-13 18:47:37,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:37,360 INFO L225 Difference]: With dead ends: 1680 [2021-11-13 18:47:37,360 INFO L226 Difference]: Without dead ends: 1011 [2021-11-13 18:47:37,367 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 18:47:37,371 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 545 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1600 mSolverCounterSat, 358 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3349.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 1958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 35.13ms SdHoareTripleChecker+Time, 358 IncrementalHoareTripleChecker+Valid, 1600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4006.81ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:37,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [545 Valid, 220 Invalid, 1958 Unknown, 0 Unchecked, 35.13ms Time], IncrementalHoareTripleChecker [358 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 4006.81ms Time] [2021-11-13 18:47:37,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1011 states. [2021-11-13 18:47:37,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1011 to 996. [2021-11-13 18:47:37,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 995 states have (on average 1.735678391959799) internal successors, (1727), 995 states have internal predecessors, (1727), 0 states have call successors, (0), 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 18:47:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1727 transitions. [2021-11-13 18:47:37,488 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1727 transitions. Word has length 36 [2021-11-13 18:47:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:37,489 INFO L470 AbstractCegarLoop]: Abstraction has 996 states and 1727 transitions. [2021-11-13 18:47:37,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 2 states have internal predecessors, (36), 0 states have call successors, (0), 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 18:47:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1727 transitions. [2021-11-13 18:47:37,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-13 18:47:37,494 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:37,495 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:47:37,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 18:47:37,496 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:37,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:37,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1022017857, now seen corresponding path program 1 times [2021-11-13 18:47:37,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:37,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059605346] [2021-11-13 18:47:37,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:37,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:37,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:37,687 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:37,688 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059605346] [2021-11-13 18:47:37,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059605346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:47:37,688 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:47:37,688 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:47:37,689 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640725349] [2021-11-13 18:47:37,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:37,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:47:37,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:37,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:47:37,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:47:37,702 INFO L87 Difference]: Start difference. First operand 996 states and 1727 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 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 18:47:41,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:41,345 INFO L93 Difference]: Finished difference Result 2871 states and 5025 transitions. [2021-11-13 18:47:41,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:47:41,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 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 101 [2021-11-13 18:47:41,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:41,358 INFO L225 Difference]: With dead ends: 2871 [2021-11-13 18:47:41,359 INFO L226 Difference]: Without dead ends: 1877 [2021-11-13 18:47:41,369 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 18:47:41,372 INFO L933 BasicCegarLoop]: 447 mSDtfsCounter, 407 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 1351 mSolverCounterSat, 325 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3028.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 407 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.72ms SdHoareTripleChecker+Time, 325 IncrementalHoareTripleChecker+Valid, 1351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3520.90ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:41,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [407 Valid, 520 Invalid, 1676 Unknown, 0 Unchecked, 21.72ms Time], IncrementalHoareTripleChecker [325 Valid, 1351 Invalid, 0 Unknown, 0 Unchecked, 3520.90ms Time] [2021-11-13 18:47:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2021-11-13 18:47:41,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1870. [2021-11-13 18:47:41,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1870 states, 1869 states have (on average 1.4719101123595506) internal successors, (2751), 1869 states have internal predecessors, (2751), 0 states have call successors, (0), 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 18:47:41,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1870 states to 1870 states and 2751 transitions. [2021-11-13 18:47:41,469 INFO L78 Accepts]: Start accepts. Automaton has 1870 states and 2751 transitions. Word has length 101 [2021-11-13 18:47:41,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:41,472 INFO L470 AbstractCegarLoop]: Abstraction has 1870 states and 2751 transitions. [2021-11-13 18:47:41,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 2 states have internal predecessors, (101), 0 states have call successors, (0), 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 18:47:41,473 INFO L276 IsEmpty]: Start isEmpty. Operand 1870 states and 2751 transitions. [2021-11-13 18:47:41,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-13 18:47:41,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:41,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:47:41,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 18:47:41,486 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:41,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:41,489 INFO L85 PathProgramCache]: Analyzing trace with hash 688837838, now seen corresponding path program 1 times [2021-11-13 18:47:41,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:41,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557548382] [2021-11-13 18:47:41,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:41,495 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:41,676 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:41,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:41,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557548382] [2021-11-13 18:47:41,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557548382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:47:41,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:47:41,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:47:41,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160393725] [2021-11-13 18:47:41,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:41,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:47:41,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:41,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:47:41,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:47:41,688 INFO L87 Difference]: Start difference. First operand 1870 states and 2751 transitions. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 18:47:47,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:47,480 INFO L93 Difference]: Finished difference Result 6370 states and 9654 transitions. [2021-11-13 18:47:47,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:47:47,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 106 [2021-11-13 18:47:47,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:47,512 INFO L225 Difference]: With dead ends: 6370 [2021-11-13 18:47:47,512 INFO L226 Difference]: Without dead ends: 4502 [2021-11-13 18:47:47,517 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 18:47:47,518 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 1084 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2582 mSolverCounterSat, 893 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4826.48ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1084 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 3475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 31.47ms SdHoareTripleChecker+Time, 893 IncrementalHoareTripleChecker+Valid, 2582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5611.10ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:47,519 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1084 Valid, 193 Invalid, 3475 Unknown, 0 Unchecked, 31.47ms Time], IncrementalHoareTripleChecker [893 Valid, 2582 Invalid, 0 Unknown, 0 Unchecked, 5611.10ms Time] [2021-11-13 18:47:47,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4502 states. [2021-11-13 18:47:47,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4502 to 4497. [2021-11-13 18:47:47,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4497 states, 4496 states have (on average 1.4270462633451957) internal successors, (6416), 4496 states have internal predecessors, (6416), 0 states have call successors, (0), 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 18:47:47,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4497 states to 4497 states and 6416 transitions. [2021-11-13 18:47:47,669 INFO L78 Accepts]: Start accepts. Automaton has 4497 states and 6416 transitions. Word has length 106 [2021-11-13 18:47:47,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:47,670 INFO L470 AbstractCegarLoop]: Abstraction has 4497 states and 6416 transitions. [2021-11-13 18:47:47,671 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 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 18:47:47,671 INFO L276 IsEmpty]: Start isEmpty. Operand 4497 states and 6416 transitions. [2021-11-13 18:47:47,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 18:47:47,675 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:47,675 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:47:47,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 18:47:47,676 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:47,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:47,677 INFO L85 PathProgramCache]: Analyzing trace with hash 785603270, now seen corresponding path program 1 times [2021-11-13 18:47:47,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:47,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483640754] [2021-11-13 18:47:47,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:47,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:47,929 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:47,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:47,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483640754] [2021-11-13 18:47:47,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483640754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:47:47,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:47:47,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:47:47,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131572352] [2021-11-13 18:47:47,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:47,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:47:47,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:47,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:47:47,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:47:47,937 INFO L87 Difference]: Start difference. First operand 4497 states and 6416 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:51,032 INFO L93 Difference]: Finished difference Result 11974 states and 17431 transitions. [2021-11-13 18:47:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:47:51,033 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-13 18:47:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:51,082 INFO L225 Difference]: With dead ends: 11974 [2021-11-13 18:47:51,082 INFO L226 Difference]: Without dead ends: 7479 [2021-11-13 18:47:51,089 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 18:47:51,091 INFO L933 BasicCegarLoop]: 422 mSDtfsCounter, 364 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2522.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 1718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.62ms SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2981.24ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:51,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 497 Invalid, 1718 Unknown, 0 Unchecked, 11.62ms Time], IncrementalHoareTripleChecker [285 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 2981.24ms Time] [2021-11-13 18:47:51,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7479 states. [2021-11-13 18:47:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7479 to 7046. [2021-11-13 18:47:51,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7046 states, 7045 states have (on average 1.3349893541518807) internal successors, (9405), 7045 states have internal predecessors, (9405), 0 states have call successors, (0), 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 18:47:51,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7046 states to 7046 states and 9405 transitions. [2021-11-13 18:47:51,298 INFO L78 Accepts]: Start accepts. Automaton has 7046 states and 9405 transitions. Word has length 142 [2021-11-13 18:47:51,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:51,300 INFO L470 AbstractCegarLoop]: Abstraction has 7046 states and 9405 transitions. [2021-11-13 18:47:51,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:47:51,301 INFO L276 IsEmpty]: Start isEmpty. Operand 7046 states and 9405 transitions. [2021-11-13 18:47:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-13 18:47:51,305 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:51,306 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:47:51,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 18:47:51,306 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:51,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1939867091, now seen corresponding path program 1 times [2021-11-13 18:47:51,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:51,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399627760] [2021-11-13 18:47:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:51,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:51,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:51,613 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 67 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-13 18:47:51,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:51,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399627760] [2021-11-13 18:47:51,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399627760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:47:51,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41466744] [2021-11-13 18:47:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:51,616 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:51,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:47:51,622 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:47:51,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 18:47:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:51,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:47:51,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:47:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 131 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-13 18:47:52,467 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:47:52,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [41466744] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:47:52,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:47:52,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-13 18:47:52,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277154023] [2021-11-13 18:47:52,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:52,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:47:52,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:52,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:47:52,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:47:52,470 INFO L87 Difference]: Start difference. First operand 7046 states and 9405 transitions. Second operand has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 18:47:55,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:55,762 INFO L93 Difference]: Finished difference Result 18766 states and 25514 transitions. [2021-11-13 18:47:55,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:47:55,763 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 171 [2021-11-13 18:47:55,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:55,835 INFO L225 Difference]: With dead ends: 18766 [2021-11-13 18:47:55,836 INFO L226 Difference]: Without dead ends: 12147 [2021-11-13 18:47:55,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:47:55,848 INFO L933 BasicCegarLoop]: 689 mSDtfsCounter, 571 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 1453 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2680.82ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 718 SdHoareTripleChecker+Invalid, 1720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.56ms SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1453 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3136.37ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:55,849 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 718 Invalid, 1720 Unknown, 0 Unchecked, 10.56ms Time], IncrementalHoareTripleChecker [267 Valid, 1453 Invalid, 0 Unknown, 0 Unchecked, 3136.37ms Time] [2021-11-13 18:47:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12147 states. [2021-11-13 18:47:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12147 to 11296. [2021-11-13 18:47:56,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11296 states, 11295 states have (on average 1.3667994687915006) internal successors, (15438), 11295 states have internal predecessors, (15438), 0 states have call successors, (0), 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 18:47:56,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11296 states to 11296 states and 15438 transitions. [2021-11-13 18:47:56,170 INFO L78 Accepts]: Start accepts. Automaton has 11296 states and 15438 transitions. Word has length 171 [2021-11-13 18:47:56,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:56,171 INFO L470 AbstractCegarLoop]: Abstraction has 11296 states and 15438 transitions. [2021-11-13 18:47:56,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.0) internal successors, (108), 3 states have internal predecessors, (108), 0 states have call successors, (0), 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 18:47:56,172 INFO L276 IsEmpty]: Start isEmpty. Operand 11296 states and 15438 transitions. [2021-11-13 18:47:56,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-13 18:47:56,178 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:56,178 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:47:56,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 18:47:56,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:47:56,394 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:56,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:56,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1676943937, now seen corresponding path program 1 times [2021-11-13 18:47:56,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:56,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99099224] [2021-11-13 18:47:56,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:56,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:56,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:56,543 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-11-13 18:47:56,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:56,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99099224] [2021-11-13 18:47:56,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99099224] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:47:56,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:47:56,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 18:47:56,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933464775] [2021-11-13 18:47:56,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:56,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:47:56,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:56,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:47:56,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:47:56,547 INFO L87 Difference]: Start difference. First operand 11296 states and 15438 transitions. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 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 18:47:59,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:47:59,025 INFO L93 Difference]: Finished difference Result 23015 states and 31467 transitions. [2021-11-13 18:47:59,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:47:59,025 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 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 179 [2021-11-13 18:47:59,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:47:59,056 INFO L225 Difference]: With dead ends: 23015 [2021-11-13 18:47:59,057 INFO L226 Difference]: Without dead ends: 11292 [2021-11-13 18:47:59,071 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 18:47:59,072 INFO L933 BasicCegarLoop]: 509 mSDtfsCounter, 381 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 1080 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1926.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 583 SdHoareTripleChecker+Invalid, 1620 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.29ms SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 1080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2358.08ms IncrementalHoareTripleChecker+Time [2021-11-13 18:47:59,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 583 Invalid, 1620 Unknown, 0 Unchecked, 6.29ms Time], IncrementalHoareTripleChecker [540 Valid, 1080 Invalid, 0 Unknown, 0 Unchecked, 2358.08ms Time] [2021-11-13 18:47:59,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11292 states. [2021-11-13 18:47:59,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11292 to 8315. [2021-11-13 18:47:59,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8315 states, 8314 states have (on average 1.2512629299975944) internal successors, (10403), 8314 states have internal predecessors, (10403), 0 states have call successors, (0), 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 18:47:59,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8315 states to 8315 states and 10403 transitions. [2021-11-13 18:47:59,272 INFO L78 Accepts]: Start accepts. Automaton has 8315 states and 10403 transitions. Word has length 179 [2021-11-13 18:47:59,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:47:59,272 INFO L470 AbstractCegarLoop]: Abstraction has 8315 states and 10403 transitions. [2021-11-13 18:47:59,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 2 states have internal predecessors, (111), 0 states have call successors, (0), 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 18:47:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 8315 states and 10403 transitions. [2021-11-13 18:47:59,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-13 18:47:59,277 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:47:59,277 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:47:59,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 18:47:59,277 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:47:59,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:47:59,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1190254331, now seen corresponding path program 1 times [2021-11-13 18:47:59,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:47:59,279 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840027257] [2021-11-13 18:47:59,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:47:59,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:47:59,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:47:59,398 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:47:59,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:47:59,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840027257] [2021-11-13 18:47:59,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840027257] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:47:59,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:47:59,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:47:59,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246804489] [2021-11-13 18:47:59,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:47:59,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:47:59,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:47:59,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:47:59,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:47:59,404 INFO L87 Difference]: Start difference. First operand 8315 states and 10403 transitions. Second operand has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 18:48:02,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:02,198 INFO L93 Difference]: Finished difference Result 21301 states and 27164 transitions. [2021-11-13 18:48:02,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:02,199 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 192 [2021-11-13 18:48:02,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:02,227 INFO L225 Difference]: With dead ends: 21301 [2021-11-13 18:48:02,228 INFO L226 Difference]: Without dead ends: 12988 [2021-11-13 18:48:02,236 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 18:48:02,237 INFO L933 BasicCegarLoop]: 746 mSDtfsCounter, 491 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 324 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2205.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 1589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.24ms SdHoareTripleChecker+Time, 324 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2666.95ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:02,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [491 Valid, 802 Invalid, 1589 Unknown, 0 Unchecked, 10.24ms Time], IncrementalHoareTripleChecker [324 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 2666.95ms Time] [2021-11-13 18:48:02,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12988 states. [2021-11-13 18:48:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12988 to 12988. [2021-11-13 18:48:02,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12988 states, 12987 states have (on average 1.223993223993224) internal successors, (15896), 12987 states have internal predecessors, (15896), 0 states have call successors, (0), 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 18:48:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12988 states to 12988 states and 15896 transitions. [2021-11-13 18:48:02,456 INFO L78 Accepts]: Start accepts. Automaton has 12988 states and 15896 transitions. Word has length 192 [2021-11-13 18:48:02,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:02,456 INFO L470 AbstractCegarLoop]: Abstraction has 12988 states and 15896 transitions. [2021-11-13 18:48:02,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.0) internal successors, (192), 3 states have internal predecessors, (192), 0 states have call successors, (0), 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 18:48:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 12988 states and 15896 transitions. [2021-11-13 18:48:02,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-13 18:48:02,463 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:02,463 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 18:48:02,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 18:48:02,464 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:02,465 INFO L85 PathProgramCache]: Analyzing trace with hash -525885613, now seen corresponding path program 1 times [2021-11-13 18:48:02,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:02,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382937599] [2021-11-13 18:48:02,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:02,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:02,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:02,605 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 215 trivial. 0 not checked. [2021-11-13 18:48:02,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:02,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382937599] [2021-11-13 18:48:02,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382937599] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:02,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:02,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:48:02,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294177100] [2021-11-13 18:48:02,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:02,607 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:02,607 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:02,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:02,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:48:02,608 INFO L87 Difference]: Start difference. First operand 12988 states and 15896 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:05,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:05,185 INFO L93 Difference]: Finished difference Result 31487 states and 38492 transitions. [2021-11-13 18:48:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:05,186 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 289 [2021-11-13 18:48:05,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:05,223 INFO L225 Difference]: With dead ends: 31487 [2021-11-13 18:48:05,223 INFO L226 Difference]: Without dead ends: 17651 [2021-11-13 18:48:05,235 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 18:48:05,236 INFO L933 BasicCegarLoop]: 877 mSDtfsCounter, 408 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 345 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2062.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 946 SdHoareTripleChecker+Invalid, 1618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.11ms SdHoareTripleChecker+Time, 345 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2441.09ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:05,237 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [408 Valid, 946 Invalid, 1618 Unknown, 0 Unchecked, 6.11ms Time], IncrementalHoareTripleChecker [345 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 2441.09ms Time] [2021-11-13 18:48:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17651 states. [2021-11-13 18:48:05,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17651 to 12114. [2021-11-13 18:48:05,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12114 states, 12113 states have (on average 1.1775778089655742) internal successors, (14264), 12113 states have internal predecessors, (14264), 0 states have call successors, (0), 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 18:48:05,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12114 states to 12114 states and 14264 transitions. [2021-11-13 18:48:05,462 INFO L78 Accepts]: Start accepts. Automaton has 12114 states and 14264 transitions. Word has length 289 [2021-11-13 18:48:05,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:05,463 INFO L470 AbstractCegarLoop]: Abstraction has 12114 states and 14264 transitions. [2021-11-13 18:48:05,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:05,463 INFO L276 IsEmpty]: Start isEmpty. Operand 12114 states and 14264 transitions. [2021-11-13 18:48:05,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2021-11-13 18:48:05,470 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:05,471 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 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 18:48:05,471 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 18:48:05,472 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:05,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:05,472 INFO L85 PathProgramCache]: Analyzing trace with hash 1232130859, now seen corresponding path program 1 times [2021-11-13 18:48:05,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:05,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510941026] [2021-11-13 18:48:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:05,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:05,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 349 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 248 trivial. 0 not checked. [2021-11-13 18:48:05,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:05,644 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510941026] [2021-11-13 18:48:05,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510941026] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:05,645 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:05,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:48:05,649 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823628971] [2021-11-13 18:48:05,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:05,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:05,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:05,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:05,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:48:05,652 INFO L87 Difference]: Start difference. First operand 12114 states and 14264 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:08,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:08,133 INFO L93 Difference]: Finished difference Result 31031 states and 36608 transitions. [2021-11-13 18:48:08,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:08,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 306 [2021-11-13 18:48:08,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:08,261 INFO L225 Difference]: With dead ends: 31031 [2021-11-13 18:48:08,262 INFO L226 Difference]: Without dead ends: 18919 [2021-11-13 18:48:08,273 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 18:48:08,274 INFO L933 BasicCegarLoop]: 345 mSDtfsCounter, 456 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 1262 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1962.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 1552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.08ms SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 1262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2340.75ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:08,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 401 Invalid, 1552 Unknown, 0 Unchecked, 6.08ms Time], IncrementalHoareTripleChecker [290 Valid, 1262 Invalid, 0 Unknown, 0 Unchecked, 2340.75ms Time] [2021-11-13 18:48:08,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18919 states. [2021-11-13 18:48:08,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18919 to 16786. [2021-11-13 18:48:08,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16786 states, 16785 states have (on average 1.1661006851355378) internal successors, (19573), 16785 states have internal predecessors, (19573), 0 states have call successors, (0), 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 18:48:08,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16786 states to 16786 states and 19573 transitions. [2021-11-13 18:48:08,590 INFO L78 Accepts]: Start accepts. Automaton has 16786 states and 19573 transitions. Word has length 306 [2021-11-13 18:48:08,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:08,591 INFO L470 AbstractCegarLoop]: Abstraction has 16786 states and 19573 transitions. [2021-11-13 18:48:08,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 18:48:08,592 INFO L276 IsEmpty]: Start isEmpty. Operand 16786 states and 19573 transitions. [2021-11-13 18:48:08,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2021-11-13 18:48:08,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:08,606 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:48:08,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 18:48:08,606 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:08,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:08,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1461489624, now seen corresponding path program 1 times [2021-11-13 18:48:08,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:08,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576188590] [2021-11-13 18:48:08,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:08,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:08,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:08,827 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:48:08,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:08,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576188590] [2021-11-13 18:48:08,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576188590] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:08,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:08,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:48:08,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705083086] [2021-11-13 18:48:08,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:08,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:08,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:08,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:08,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:48:08,831 INFO L87 Difference]: Start difference. First operand 16786 states and 19573 transitions. Second operand has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 18:48:11,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:11,608 INFO L93 Difference]: Finished difference Result 40431 states and 47471 transitions. [2021-11-13 18:48:11,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:11,609 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 350 [2021-11-13 18:48:11,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:11,633 INFO L225 Difference]: With dead ends: 40431 [2021-11-13 18:48:11,633 INFO L226 Difference]: Without dead ends: 22797 [2021-11-13 18:48:11,644 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 18:48:11,645 INFO L933 BasicCegarLoop]: 841 mSDtfsCounter, 381 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1296 mSolverCounterSat, 246 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2205.77ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 1542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.68ms SdHoareTripleChecker+Time, 246 IncrementalHoareTripleChecker+Valid, 1296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2593.38ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:11,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 916 Invalid, 1542 Unknown, 0 Unchecked, 6.68ms Time], IncrementalHoareTripleChecker [246 Valid, 1296 Invalid, 0 Unknown, 0 Unchecked, 2593.38ms Time] [2021-11-13 18:48:11,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22797 states. [2021-11-13 18:48:12,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22797 to 22362. [2021-11-13 18:48:12,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22362 states, 22361 states have (on average 1.1453423371047806) internal successors, (25611), 22361 states have internal predecessors, (25611), 0 states have call successors, (0), 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 18:48:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22362 states to 22362 states and 25611 transitions. [2021-11-13 18:48:12,080 INFO L78 Accepts]: Start accepts. Automaton has 22362 states and 25611 transitions. Word has length 350 [2021-11-13 18:48:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:12,081 INFO L470 AbstractCegarLoop]: Abstraction has 22362 states and 25611 transitions. [2021-11-13 18:48:12,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 105.66666666666667) internal successors, (317), 3 states have internal predecessors, (317), 0 states have call successors, (0), 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 18:48:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 22362 states and 25611 transitions. [2021-11-13 18:48:12,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-11-13 18:48:12,089 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:12,090 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:48:12,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 18:48:12,091 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:12,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:12,091 INFO L85 PathProgramCache]: Analyzing trace with hash -397845730, now seen corresponding path program 1 times [2021-11-13 18:48:12,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:12,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351418165] [2021-11-13 18:48:12,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:12,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:12,302 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 288 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 18:48:12,302 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:12,302 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351418165] [2021-11-13 18:48:12,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351418165] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:12,303 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:12,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:48:12,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156436168] [2021-11-13 18:48:12,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:12,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:12,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:12,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:12,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:48:12,306 INFO L87 Difference]: Start difference. First operand 22362 states and 25611 transitions. Second operand has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 18:48:14,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:14,897 INFO L93 Difference]: Finished difference Result 55815 states and 63977 transitions. [2021-11-13 18:48:14,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:14,900 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 357 [2021-11-13 18:48:14,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:14,934 INFO L225 Difference]: With dead ends: 55815 [2021-11-13 18:48:14,934 INFO L226 Difference]: Without dead ends: 33016 [2021-11-13 18:48:14,947 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 18:48:14,948 INFO L933 BasicCegarLoop]: 703 mSDtfsCounter, 395 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1298 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1972.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 1566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.38ms SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2368.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:14,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 755 Invalid, 1566 Unknown, 0 Unchecked, 6.38ms Time], IncrementalHoareTripleChecker [268 Valid, 1298 Invalid, 0 Unknown, 0 Unchecked, 2368.03ms Time] [2021-11-13 18:48:14,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33016 states. [2021-11-13 18:48:15,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33016 to 28329. [2021-11-13 18:48:15,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28329 states, 28328 states have (on average 1.1432857949731714) internal successors, (32387), 28328 states have internal predecessors, (32387), 0 states have call successors, (0), 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 18:48:15,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28329 states to 28329 states and 32387 transitions. [2021-11-13 18:48:15,583 INFO L78 Accepts]: Start accepts. Automaton has 28329 states and 32387 transitions. Word has length 357 [2021-11-13 18:48:15,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:15,584 INFO L470 AbstractCegarLoop]: Abstraction has 28329 states and 32387 transitions. [2021-11-13 18:48:15,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.0) internal successors, (276), 3 states have internal predecessors, (276), 0 states have call successors, (0), 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 18:48:15,585 INFO L276 IsEmpty]: Start isEmpty. Operand 28329 states and 32387 transitions. [2021-11-13 18:48:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2021-11-13 18:48:15,598 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:15,599 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-11-13 18:48:15,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 18:48:15,600 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:15,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:15,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1041601103, now seen corresponding path program 1 times [2021-11-13 18:48:15,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:15,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86372246] [2021-11-13 18:48:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:15,602 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:15,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 527 proven. 0 refuted. 0 times theorem prover too weak. 115 trivial. 0 not checked. [2021-11-13 18:48:16,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:16,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86372246] [2021-11-13 18:48:16,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86372246] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:16,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:16,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:48:16,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996574461] [2021-11-13 18:48:16,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:16,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:16,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:16,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:16,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:48:16,065 INFO L87 Difference]: Start difference. First operand 28329 states and 32387 transitions. Second operand has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 18:48:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:19,172 INFO L93 Difference]: Finished difference Result 70282 states and 80282 transitions. [2021-11-13 18:48:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:19,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 432 [2021-11-13 18:48:19,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:19,220 INFO L225 Difference]: With dead ends: 70282 [2021-11-13 18:48:19,220 INFO L226 Difference]: Without dead ends: 41089 [2021-11-13 18:48:19,245 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 18:48:19,246 INFO L933 BasicCegarLoop]: 612 mSDtfsCounter, 446 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2419.62ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 650 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.78ms SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2806.94ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:19,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [446 Valid, 650 Invalid, 1509 Unknown, 0 Unchecked, 6.78ms Time], IncrementalHoareTripleChecker [304 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 2806.94ms Time] [2021-11-13 18:48:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41089 states. [2021-11-13 18:48:19,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41089 to 36400. [2021-11-13 18:48:19,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36400 states, 36399 states have (on average 1.1283551745927085) internal successors, (41071), 36399 states have internal predecessors, (41071), 0 states have call successors, (0), 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 18:48:19,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36400 states to 36400 states and 41071 transitions. [2021-11-13 18:48:19,997 INFO L78 Accepts]: Start accepts. Automaton has 36400 states and 41071 transitions. Word has length 432 [2021-11-13 18:48:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:19,997 INFO L470 AbstractCegarLoop]: Abstraction has 36400 states and 41071 transitions. [2021-11-13 18:48:19,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.33333333333333) internal successors, (319), 3 states have internal predecessors, (319), 0 states have call successors, (0), 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 18:48:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 36400 states and 41071 transitions. [2021-11-13 18:48:20,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 437 [2021-11-13 18:48:20,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:20,013 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-11-13 18:48:20,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 18:48:20,014 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:20,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:20,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1448528408, now seen corresponding path program 1 times [2021-11-13 18:48:20,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:20,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535939515] [2021-11-13 18:48:20,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:20,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 606 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:48:20,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:20,402 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535939515] [2021-11-13 18:48:20,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535939515] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:20,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:20,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:48:20,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747619822] [2021-11-13 18:48:20,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:20,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:48:20,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:20,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:48:20,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:48:20,406 INFO L87 Difference]: Start difference. First operand 36400 states and 41071 transitions. Second operand has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 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 18:48:24,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:24,581 INFO L93 Difference]: Finished difference Result 89020 states and 100635 transitions. [2021-11-13 18:48:24,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:48:24,581 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 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 436 [2021-11-13 18:48:24,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:24,636 INFO L225 Difference]: With dead ends: 89020 [2021-11-13 18:48:24,637 INFO L226 Difference]: Without dead ends: 52622 [2021-11-13 18:48:24,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:48:24,654 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 825 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 2332 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3135.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 825 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 2817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.94ms SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 2332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3783.80ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:24,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [825 Valid, 195 Invalid, 2817 Unknown, 0 Unchecked, 9.94ms Time], IncrementalHoareTripleChecker [485 Valid, 2332 Invalid, 0 Unknown, 0 Unchecked, 3783.80ms Time] [2021-11-13 18:48:24,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52622 states. [2021-11-13 18:48:25,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52622 to 47077. [2021-11-13 18:48:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47077 states, 47076 states have (on average 1.1351431727419492) internal successors, (53438), 47076 states have internal predecessors, (53438), 0 states have call successors, (0), 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 18:48:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47077 states to 47077 states and 53438 transitions. [2021-11-13 18:48:25,435 INFO L78 Accepts]: Start accepts. Automaton has 47077 states and 53438 transitions. Word has length 436 [2021-11-13 18:48:25,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:25,436 INFO L470 AbstractCegarLoop]: Abstraction has 47077 states and 53438 transitions. [2021-11-13 18:48:25,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 100.75) internal successors, (403), 4 states have internal predecessors, (403), 0 states have call successors, (0), 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 18:48:25,437 INFO L276 IsEmpty]: Start isEmpty. Operand 47077 states and 53438 transitions. [2021-11-13 18:48:25,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 456 [2021-11-13 18:48:25,455 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:25,455 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-11-13 18:48:25,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 18:48:25,456 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:25,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:25,457 INFO L85 PathProgramCache]: Analyzing trace with hash 510641702, now seen corresponding path program 1 times [2021-11-13 18:48:25,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:25,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212108543] [2021-11-13 18:48:25,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:25,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:25,684 INFO L134 CoverageAnalysis]: Checked inductivity of 682 backedges. 566 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-13 18:48:25,684 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:25,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212108543] [2021-11-13 18:48:25,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212108543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:25,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:25,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:48:25,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326522756] [2021-11-13 18:48:25,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:25,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:25,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:25,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:25,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:48:25,687 INFO L87 Difference]: Start difference. First operand 47077 states and 53438 transitions. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 18:48:28,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:28,417 INFO L93 Difference]: Finished difference Result 112880 states and 128589 transitions. [2021-11-13 18:48:28,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:28,418 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 455 [2021-11-13 18:48:28,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:28,491 INFO L225 Difference]: With dead ends: 112880 [2021-11-13 18:48:28,492 INFO L226 Difference]: Without dead ends: 65805 [2021-11-13 18:48:28,514 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 18:48:28,515 INFO L933 BasicCegarLoop]: 271 mSDtfsCounter, 393 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1246 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2074.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.76ms SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2395.60ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:28,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 314 Invalid, 1455 Unknown, 0 Unchecked, 4.76ms Time], IncrementalHoareTripleChecker [209 Valid, 1246 Invalid, 0 Unknown, 0 Unchecked, 2395.60ms Time] [2021-11-13 18:48:28,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65805 states. [2021-11-13 18:48:29,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65805 to 64513. [2021-11-13 18:48:29,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64513 states, 64512 states have (on average 1.1274646577380953) internal successors, (72735), 64512 states have internal predecessors, (72735), 0 states have call successors, (0), 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 18:48:29,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64513 states to 64513 states and 72735 transitions. [2021-11-13 18:48:29,615 INFO L78 Accepts]: Start accepts. Automaton has 64513 states and 72735 transitions. Word has length 455 [2021-11-13 18:48:29,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:29,616 INFO L470 AbstractCegarLoop]: Abstraction has 64513 states and 72735 transitions. [2021-11-13 18:48:29,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 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 18:48:29,616 INFO L276 IsEmpty]: Start isEmpty. Operand 64513 states and 72735 transitions. [2021-11-13 18:48:29,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 457 [2021-11-13 18:48:29,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:29,633 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:48:29,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 18:48:29,633 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:29,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:29,634 INFO L85 PathProgramCache]: Analyzing trace with hash -526620874, now seen corresponding path program 1 times [2021-11-13 18:48:29,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:29,635 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382271408] [2021-11-13 18:48:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:29,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 544 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-13 18:48:30,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:30,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382271408] [2021-11-13 18:48:30,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382271408] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:30,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:30,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:48:30,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611321064] [2021-11-13 18:48:30,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:30,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:30,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:30,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:30,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:48:30,159 INFO L87 Difference]: Start difference. First operand 64513 states and 72735 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 18:48:33,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:33,058 INFO L93 Difference]: Finished difference Result 142216 states and 159759 transitions. [2021-11-13 18:48:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:33,059 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 456 [2021-11-13 18:48:33,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:33,289 INFO L225 Difference]: With dead ends: 142216 [2021-11-13 18:48:33,290 INFO L226 Difference]: Without dead ends: 77280 [2021-11-13 18:48:33,319 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 18:48:33,321 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 368 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 1286 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2004.51ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.71ms SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 1286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2367.77ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:33,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 809 Invalid, 1446 Unknown, 0 Unchecked, 5.71ms Time], IncrementalHoareTripleChecker [160 Valid, 1286 Invalid, 0 Unknown, 0 Unchecked, 2367.77ms Time] [2021-11-13 18:48:33,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77280 states. [2021-11-13 18:48:34,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77280 to 74709. [2021-11-13 18:48:34,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74709 states, 74708 states have (on average 1.1155967232424908) internal successors, (83344), 74708 states have internal predecessors, (83344), 0 states have call successors, (0), 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 18:48:34,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74709 states to 74709 states and 83344 transitions. [2021-11-13 18:48:34,407 INFO L78 Accepts]: Start accepts. Automaton has 74709 states and 83344 transitions. Word has length 456 [2021-11-13 18:48:34,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:34,407 INFO L470 AbstractCegarLoop]: Abstraction has 74709 states and 83344 transitions. [2021-11-13 18:48:34,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 18:48:34,407 INFO L276 IsEmpty]: Start isEmpty. Operand 74709 states and 83344 transitions. [2021-11-13 18:48:34,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-11-13 18:48:34,423 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:34,424 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:48:34,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 18:48:34,425 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:34,426 INFO L85 PathProgramCache]: Analyzing trace with hash 102580086, now seen corresponding path program 1 times [2021-11-13 18:48:34,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:34,426 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108673160] [2021-11-13 18:48:34,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:34,427 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:34,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:34,929 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 424 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-13 18:48:34,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:34,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108673160] [2021-11-13 18:48:34,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108673160] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:34,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:34,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:48:34,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983507696] [2021-11-13 18:48:34,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:34,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:34,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:34,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:34,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:48:34,934 INFO L87 Difference]: Start difference. First operand 74709 states and 83344 transitions. Second operand has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 18:48:37,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:37,880 INFO L93 Difference]: Finished difference Result 158785 states and 177330 transitions. [2021-11-13 18:48:37,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:37,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 474 [2021-11-13 18:48:37,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:37,975 INFO L225 Difference]: With dead ends: 158785 [2021-11-13 18:48:37,975 INFO L226 Difference]: Without dead ends: 84078 [2021-11-13 18:48:38,002 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 18:48:38,003 INFO L933 BasicCegarLoop]: 707 mSDtfsCounter, 338 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1147 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1934.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 1334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.13ms SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 1147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2279.03ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:38,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 761 Invalid, 1334 Unknown, 0 Unchecked, 5.13ms Time], IncrementalHoareTripleChecker [187 Valid, 1147 Invalid, 0 Unknown, 0 Unchecked, 2279.03ms Time] [2021-11-13 18:48:38,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84078 states. [2021-11-13 18:48:39,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84078 to 75530. [2021-11-13 18:48:39,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75530 states, 75529 states have (on average 1.104675025486899) internal successors, (83435), 75529 states have internal predecessors, (83435), 0 states have call successors, (0), 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 18:48:39,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75530 states to 75530 states and 83435 transitions. [2021-11-13 18:48:39,574 INFO L78 Accepts]: Start accepts. Automaton has 75530 states and 83435 transitions. Word has length 474 [2021-11-13 18:48:39,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:39,575 INFO L470 AbstractCegarLoop]: Abstraction has 75530 states and 83435 transitions. [2021-11-13 18:48:39,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 106.66666666666667) internal successors, (320), 3 states have internal predecessors, (320), 0 states have call successors, (0), 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 18:48:39,575 INFO L276 IsEmpty]: Start isEmpty. Operand 75530 states and 83435 transitions. [2021-11-13 18:48:39,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-13 18:48:39,604 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:39,605 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:48:39,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-13 18:48:39,605 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:39,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:39,606 INFO L85 PathProgramCache]: Analyzing trace with hash 984657420, now seen corresponding path program 1 times [2021-11-13 18:48:39,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:39,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785279946] [2021-11-13 18:48:39,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:39,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:39,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 416 proven. 0 refuted. 0 times theorem prover too weak. 229 trivial. 0 not checked. [2021-11-13 18:48:39,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:39,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785279946] [2021-11-13 18:48:39,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785279946] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:39,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:39,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:48:39,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789377791] [2021-11-13 18:48:39,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:39,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:39,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:39,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:39,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:48:39,863 INFO L87 Difference]: Start difference. First operand 75530 states and 83435 transitions. Second operand has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 18:48:42,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:42,737 INFO L93 Difference]: Finished difference Result 166393 states and 183605 transitions. [2021-11-13 18:48:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 479 [2021-11-13 18:48:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:42,831 INFO L225 Difference]: With dead ends: 166393 [2021-11-13 18:48:42,831 INFO L226 Difference]: Without dead ends: 90865 [2021-11-13 18:48:42,851 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 18:48:42,852 INFO L933 BasicCegarLoop]: 756 mSDtfsCounter, 290 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 1306 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1809.81ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 811 SdHoareTripleChecker+Invalid, 1416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.28ms SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 1306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2151.25ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:42,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 811 Invalid, 1416 Unknown, 0 Unchecked, 5.28ms Time], IncrementalHoareTripleChecker [110 Valid, 1306 Invalid, 0 Unknown, 0 Unchecked, 2151.25ms Time] [2021-11-13 18:48:42,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90865 states. [2021-11-13 18:48:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90865 to 89992. [2021-11-13 18:48:43,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89992 states, 89991 states have (on average 1.0961096109610962) internal successors, (98640), 89991 states have internal predecessors, (98640), 0 states have call successors, (0), 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 18:48:44,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89992 states to 89992 states and 98640 transitions. [2021-11-13 18:48:44,029 INFO L78 Accepts]: Start accepts. Automaton has 89992 states and 98640 transitions. Word has length 479 [2021-11-13 18:48:44,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:44,029 INFO L470 AbstractCegarLoop]: Abstraction has 89992 states and 98640 transitions. [2021-11-13 18:48:44,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 108.33333333333333) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 18:48:44,030 INFO L276 IsEmpty]: Start isEmpty. Operand 89992 states and 98640 transitions. [2021-11-13 18:48:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-11-13 18:48:44,039 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:44,040 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:48:44,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-13 18:48:44,040 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:44,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:44,041 INFO L85 PathProgramCache]: Analyzing trace with hash -1207529746, now seen corresponding path program 1 times [2021-11-13 18:48:44,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:44,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920389415] [2021-11-13 18:48:44,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:44,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:44,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 668 backedges. 552 proven. 0 refuted. 0 times theorem prover too weak. 116 trivial. 0 not checked. [2021-11-13 18:48:44,590 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:44,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920389415] [2021-11-13 18:48:44,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920389415] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:44,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:48:44,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 18:48:44,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295593119] [2021-11-13 18:48:44,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:44,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:44,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:44,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:44,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 18:48:44,594 INFO L87 Difference]: Start difference. First operand 89992 states and 98640 transitions. Second operand has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 18:48:47,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:47,371 INFO L93 Difference]: Finished difference Result 191077 states and 209690 transitions. [2021-11-13 18:48:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:47,372 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 479 [2021-11-13 18:48:47,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:47,501 INFO L225 Difference]: With dead ends: 191077 [2021-11-13 18:48:47,501 INFO L226 Difference]: Without dead ends: 100658 [2021-11-13 18:48:47,904 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 18:48:47,905 INFO L933 BasicCegarLoop]: 198 mSDtfsCounter, 436 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1239 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1826.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 436 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.27ms SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2149.64ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:47,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [436 Valid, 245 Invalid, 1458 Unknown, 0 Unchecked, 5.27ms Time], IncrementalHoareTripleChecker [219 Valid, 1239 Invalid, 0 Unknown, 0 Unchecked, 2149.64ms Time] [2021-11-13 18:48:47,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100658 states. [2021-11-13 18:48:48,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100658 to 97653. [2021-11-13 18:48:49,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97653 states, 97652 states have (on average 1.0970487035595788) internal successors, (107129), 97652 states have internal predecessors, (107129), 0 states have call successors, (0), 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 18:48:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97653 states to 97653 states and 107129 transitions. [2021-11-13 18:48:49,167 INFO L78 Accepts]: Start accepts. Automaton has 97653 states and 107129 transitions. Word has length 479 [2021-11-13 18:48:49,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:49,168 INFO L470 AbstractCegarLoop]: Abstraction has 97653 states and 107129 transitions. [2021-11-13 18:48:49,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.66666666666667) internal successors, (365), 3 states have internal predecessors, (365), 0 states have call successors, (0), 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 18:48:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 97653 states and 107129 transitions. [2021-11-13 18:48:49,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-11-13 18:48:49,179 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:49,180 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:48:49,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 18:48:49,181 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:49,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:49,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1207972705, now seen corresponding path program 1 times [2021-11-13 18:48:49,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:49,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979171774] [2021-11-13 18:48:49,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:49,183 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 17 proven. 84 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-11-13 18:48:49,466 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:49,466 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979171774] [2021-11-13 18:48:49,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979171774] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:49,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100660720] [2021-11-13 18:48:49,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:49,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:49,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:49,469 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:49,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 18:48:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:49,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 624 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:48:49,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:50,545 INFO L134 CoverageAnalysis]: Checked inductivity of 413 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2021-11-13 18:48:50,545 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:48:50,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100660720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:50,545 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:48:50,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-13 18:48:50,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73144164] [2021-11-13 18:48:50,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:50,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:48:50,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:50,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:48:50,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:48:50,548 INFO L87 Difference]: Start difference. First operand 97653 states and 107129 transitions. Second operand has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 18:48:53,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:53,352 INFO L93 Difference]: Finished difference Result 194449 states and 213228 transitions. [2021-11-13 18:48:53,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:48:53,353 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 482 [2021-11-13 18:48:53,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:53,456 INFO L225 Difference]: With dead ends: 194449 [2021-11-13 18:48:53,456 INFO L226 Difference]: Without dead ends: 96370 [2021-11-13 18:48:53,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-13 18:48:53,499 INFO L933 BasicCegarLoop]: 284 mSDtfsCounter, 437 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1982.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.23ms SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2270.91ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:53,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [437 Valid, 327 Invalid, 1364 Unknown, 0 Unchecked, 4.23ms Time], IncrementalHoareTripleChecker [193 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 2270.91ms Time] [2021-11-13 18:48:53,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96370 states. [2021-11-13 18:48:54,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96370 to 90406. [2021-11-13 18:48:55,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90406 states, 90405 states have (on average 1.087694264697749) internal successors, (98333), 90405 states have internal predecessors, (98333), 0 states have call successors, (0), 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 18:48:55,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90406 states to 90406 states and 98333 transitions. [2021-11-13 18:48:55,554 INFO L78 Accepts]: Start accepts. Automaton has 90406 states and 98333 transitions. Word has length 482 [2021-11-13 18:48:55,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:48:55,554 INFO L470 AbstractCegarLoop]: Abstraction has 90406 states and 98333 transitions. [2021-11-13 18:48:55,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 84.66666666666667) internal successors, (254), 3 states have internal predecessors, (254), 0 states have call successors, (0), 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 18:48:55,555 INFO L276 IsEmpty]: Start isEmpty. Operand 90406 states and 98333 transitions. [2021-11-13 18:48:55,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 514 [2021-11-13 18:48:55,566 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:48:55,567 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 18:48:55,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 18:48:55,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:55,782 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:48:55,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:48:55,782 INFO L85 PathProgramCache]: Analyzing trace with hash 618495215, now seen corresponding path program 1 times [2021-11-13 18:48:55,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:48:55,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711876243] [2021-11-13 18:48:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:55,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:48:55,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:56,052 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 532 proven. 108 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 18:48:56,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:48:56,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711876243] [2021-11-13 18:48:56,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711876243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:48:56,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475064690] [2021-11-13 18:48:56,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:48:56,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:48:56,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:48:56,055 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:48:56,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 18:48:56,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:48:56,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 680 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-13 18:48:56,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:48:58,155 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 450 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-13 18:48:58,155 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:48:58,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475064690] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:48:58,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:48:58,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-13 18:48:58,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838219060] [2021-11-13 18:48:58,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:48:58,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:48:58,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:48:58,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:48:58,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:48:58,159 INFO L87 Difference]: Start difference. First operand 90406 states and 98333 transitions. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 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 18:48:59,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:48:59,046 INFO L93 Difference]: Finished difference Result 90891 states and 98826 transitions. [2021-11-13 18:48:59,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:48:59,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 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 513 [2021-11-13 18:48:59,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:48:59,172 INFO L225 Difference]: With dead ends: 90891 [2021-11-13 18:48:59,172 INFO L226 Difference]: Without dead ends: 90889 [2021-11-13 18:48:59,181 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 517 GetRequests, 512 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:48:59,182 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 0 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 159.40ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 882 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.50ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 883 IncrementalHoareTripleChecker+Unchecked, 194.72ms IncrementalHoareTripleChecker+Time [2021-11-13 18:48:59,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 882 Invalid, 1046 Unknown, 0 Unchecked, 7.50ms Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 883 Unchecked, 194.72ms Time] [2021-11-13 18:48:59,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90889 states. [2021-11-13 18:49:00,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90889 to 90762. [2021-11-13 18:49:00,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90762 states, 90761 states have (on average 1.087438437214222) internal successors, (98697), 90761 states have internal predecessors, (98697), 0 states have call successors, (0), 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 18:49:00,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90762 states to 90762 states and 98697 transitions. [2021-11-13 18:49:00,579 INFO L78 Accepts]: Start accepts. Automaton has 90762 states and 98697 transitions. Word has length 513 [2021-11-13 18:49:00,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:00,580 INFO L470 AbstractCegarLoop]: Abstraction has 90762 states and 98697 transitions. [2021-11-13 18:49:00,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 4 states have internal predecessors, (325), 0 states have call successors, (0), 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 18:49:00,580 INFO L276 IsEmpty]: Start isEmpty. Operand 90762 states and 98697 transitions. [2021-11-13 18:49:00,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2021-11-13 18:49:00,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:00,590 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:49:00,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:00,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:00,791 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:00,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:00,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1842067513, now seen corresponding path program 1 times [2021-11-13 18:49:00,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:00,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891360473] [2021-11-13 18:49:00,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:00,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:00,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,069 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 336 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 18:49:01,070 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:01,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891360473] [2021-11-13 18:49:01,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891360473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:01,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682421190] [2021-11-13 18:49:01,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:01,071 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:01,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:01,072 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:01,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 18:49:01,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:01,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-13 18:49:01,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:02,785 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 254 proven. 82 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:49:02,786 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 18:49:05,571 INFO L134 CoverageAnalysis]: Checked inductivity of 370 backedges. 254 proven. 82 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:49:05,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682421190] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 18:49:05,571 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 18:49:05,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 9 [2021-11-13 18:49:05,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007503499] [2021-11-13 18:49:05,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 18:49:05,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-13 18:49:05,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:05,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-13 18:49:05,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-13 18:49:05,576 INFO L87 Difference]: Start difference. First operand 90762 states and 98697 transitions. Second operand has 9 states, 9 states have (on average 134.33333333333334) internal successors, (1209), 9 states have internal predecessors, (1209), 0 states have call successors, (0), 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 18:49:25,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:25,716 INFO L93 Difference]: Finished difference Result 281914 states and 307468 transitions. [2021-11-13 18:49:25,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-13 18:49:25,716 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 134.33333333333334) internal successors, (1209), 9 states have internal predecessors, (1209), 0 states have call successors, (0), 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 527 [2021-11-13 18:49:25,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:25,938 INFO L225 Difference]: With dead ends: 281914 [2021-11-13 18:49:25,938 INFO L226 Difference]: Without dead ends: 190729 [2021-11-13 18:49:25,986 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1083 GetRequests, 1063 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2021-11-13 18:49:25,987 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 7979 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 13188 mSolverCounterSat, 2142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15778.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 7979 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 15330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 58.27ms SdHoareTripleChecker+Time, 2142 IncrementalHoareTripleChecker+Valid, 13188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18424.17ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:25,987 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7979 Valid, 454 Invalid, 15330 Unknown, 0 Unchecked, 58.27ms Time], IncrementalHoareTripleChecker [2142 Valid, 13188 Invalid, 0 Unknown, 0 Unchecked, 18424.17ms Time] [2021-11-13 18:49:26,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190729 states. [2021-11-13 18:49:28,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190729 to 137643. [2021-11-13 18:49:28,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137643 states, 137642 states have (on average 1.0855698115400823) internal successors, (149420), 137642 states have internal predecessors, (149420), 0 states have call successors, (0), 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 18:49:28,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137643 states to 137643 states and 149420 transitions. [2021-11-13 18:49:28,721 INFO L78 Accepts]: Start accepts. Automaton has 137643 states and 149420 transitions. Word has length 527 [2021-11-13 18:49:28,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:28,721 INFO L470 AbstractCegarLoop]: Abstraction has 137643 states and 149420 transitions. [2021-11-13 18:49:28,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 134.33333333333334) internal successors, (1209), 9 states have internal predecessors, (1209), 0 states have call successors, (0), 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 18:49:28,722 INFO L276 IsEmpty]: Start isEmpty. Operand 137643 states and 149420 transitions. [2021-11-13 18:49:28,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2021-11-13 18:49:28,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:28,731 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 18:49:28,759 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:28,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:28,932 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:28,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:28,933 INFO L85 PathProgramCache]: Analyzing trace with hash 69490722, now seen corresponding path program 1 times [2021-11-13 18:49:28,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:28,933 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449115993] [2021-11-13 18:49:28,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:28,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:29,205 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 613 proven. 141 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:49:29,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:29,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449115993] [2021-11-13 18:49:29,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449115993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:29,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291018386] [2021-11-13 18:49:29,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:29,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:29,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:29,208 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:29,230 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 18:49:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:29,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 713 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:49:29,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:32,932 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 135 proven. 0 refuted. 0 times theorem prover too weak. 653 trivial. 0 not checked. [2021-11-13 18:49:32,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:49:32,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291018386] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:32,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:32,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-13 18:49:32,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075765430] [2021-11-13 18:49:32,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:32,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:49:32,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:32,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:49:32,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:49:32,935 INFO L87 Difference]: Start difference. First operand 137643 states and 149420 transitions. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 18:49:33,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:33,388 INFO L93 Difference]: Finished difference Result 138070 states and 149847 transitions. [2021-11-13 18:49:33,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:49:33,389 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 543 [2021-11-13 18:49:33,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:33,986 INFO L225 Difference]: With dead ends: 138070 [2021-11-13 18:49:33,986 INFO L226 Difference]: Without dead ends: 137643 [2021-11-13 18:49:33,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 18:49:33,999 INFO L933 BasicCegarLoop]: 758 mSDtfsCounter, 392 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 392 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 1119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.71ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1119 IncrementalHoareTripleChecker+Unchecked, 1.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:33,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [392 Valid, 813 Invalid, 1119 Unknown, 0 Unchecked, 2.71ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 1119 Unchecked, 1.58ms Time] [2021-11-13 18:49:34,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137643 states. [2021-11-13 18:49:35,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137643 to 137643. [2021-11-13 18:49:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137643 states, 137642 states have (on average 1.0851121024106014) internal successors, (149357), 137642 states have internal predecessors, (149357), 0 states have call successors, (0), 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 18:49:35,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137643 states to 137643 states and 149357 transitions. [2021-11-13 18:49:35,880 INFO L78 Accepts]: Start accepts. Automaton has 137643 states and 149357 transitions. Word has length 543 [2021-11-13 18:49:35,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:35,880 INFO L470 AbstractCegarLoop]: Abstraction has 137643 states and 149357 transitions. [2021-11-13 18:49:35,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 0 states have call successors, (0), 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 18:49:35,881 INFO L276 IsEmpty]: Start isEmpty. Operand 137643 states and 149357 transitions. [2021-11-13 18:49:35,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2021-11-13 18:49:35,892 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:35,892 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 18:49:35,917 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:36,092 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-13 18:49:36,093 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:36,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:36,094 INFO L85 PathProgramCache]: Analyzing trace with hash -762174023, now seen corresponding path program 1 times [2021-11-13 18:49:36,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:36,094 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057973644] [2021-11-13 18:49:36,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:36,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:36,427 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 274 proven. 82 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-13 18:49:36,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:36,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057973644] [2021-11-13 18:49:36,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057973644] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 18:49:36,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179085723] [2021-11-13 18:49:36,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:36,428 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:36,428 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 18:49:36,429 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 18:49:36,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-13 18:49:36,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:36,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 18:49:36,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 18:49:38,920 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2021-11-13 18:49:38,920 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-13 18:49:38,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179085723] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:38,921 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 18:49:38,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2021-11-13 18:49:38,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381179304] [2021-11-13 18:49:38,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:38,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 18:49:38,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:38,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 18:49:38,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:38,923 INFO L87 Difference]: Start difference. First operand 137643 states and 149357 transitions. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 18:49:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:39,373 INFO L93 Difference]: Finished difference Result 137680 states and 149394 transitions. [2021-11-13 18:49:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 18:49:39,374 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 547 [2021-11-13 18:49:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:39,532 INFO L225 Difference]: With dead ends: 137680 [2021-11-13 18:49:39,533 INFO L226 Difference]: Without dead ends: 137678 [2021-11-13 18:49:39,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 546 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-13 18:49:39,562 INFO L933 BasicCegarLoop]: 757 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 728 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.94ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 728 IncrementalHoareTripleChecker+Unchecked, 1.30ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:39,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 812 Invalid, 728 Unknown, 0 Unchecked, 1.94ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 728 Unchecked, 1.30ms Time] [2021-11-13 18:49:39,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137678 states. [2021-11-13 18:49:41,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137678 to 137644. [2021-11-13 18:49:41,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137644 states, 137643 states have (on average 1.0851114840565812) internal successors, (149358), 137643 states have internal predecessors, (149358), 0 states have call successors, (0), 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 18:49:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137644 states to 137644 states and 149358 transitions. [2021-11-13 18:49:41,917 INFO L78 Accepts]: Start accepts. Automaton has 137644 states and 149358 transitions. Word has length 547 [2021-11-13 18:49:41,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 18:49:41,917 INFO L470 AbstractCegarLoop]: Abstraction has 137644 states and 149358 transitions. [2021-11-13 18:49:41,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 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 18:49:41,917 INFO L276 IsEmpty]: Start isEmpty. Operand 137644 states and 149358 transitions. [2021-11-13 18:49:41,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2021-11-13 18:49:41,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 18:49:41,928 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 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] [2021-11-13 18:49:41,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-13 18:49:42,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_34a90b6c-f971-470b-823b-5d1ef6fadc68/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 18:49:42,129 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 18:49:42,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 18:49:42,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1939608736, now seen corresponding path program 1 times [2021-11-13 18:49:42,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 18:49:42,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490457188] [2021-11-13 18:49:42,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 18:49:42,130 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 18:49:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 18:49:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 483 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-11-13 18:49:42,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 18:49:42,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490457188] [2021-11-13 18:49:42,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490457188] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 18:49:42,403 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 18:49:42,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 18:49:42,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993878551] [2021-11-13 18:49:42,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 18:49:42,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 18:49:42,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 18:49:42,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 18:49:42,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:49:42,405 INFO L87 Difference]: Start difference. First operand 137644 states and 149358 transitions. Second operand has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 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 18:49:47,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 18:49:47,810 INFO L93 Difference]: Finished difference Result 289770 states and 314473 transitions. [2021-11-13 18:49:47,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 18:49:47,820 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 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 568 [2021-11-13 18:49:47,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 18:49:48,023 INFO L225 Difference]: With dead ends: 289770 [2021-11-13 18:49:48,023 INFO L226 Difference]: Without dead ends: 152128 [2021-11-13 18:49:48,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 18:49:48,087 INFO L933 BasicCegarLoop]: 280 mSDtfsCounter, 740 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 2881 mSolverCounterSat, 344 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3361.43ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 740 SdHoareTripleChecker+Valid, 398 SdHoareTripleChecker+Invalid, 3225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.77ms SdHoareTripleChecker+Time, 344 IncrementalHoareTripleChecker+Valid, 2881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3981.58ms IncrementalHoareTripleChecker+Time [2021-11-13 18:49:48,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [740 Valid, 398 Invalid, 3225 Unknown, 0 Unchecked, 12.77ms Time], IncrementalHoareTripleChecker [344 Valid, 2881 Invalid, 0 Unknown, 0 Unchecked, 3981.58ms Time] [2021-11-13 18:49:48,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152128 states.