./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label05.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_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/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_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label05.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/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_d6800512-1047-4c80-a13e-210197218ee4/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 55a25aaba499ad6f05f5b24cde70628308432569fd1f75e76cd806a685179688 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:42:57,447 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:42:57,450 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:42:57,490 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:42:57,491 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:42:57,493 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:42:57,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:42:57,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:42:57,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:42:57,503 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:42:57,505 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:42:57,507 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:42:57,508 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:42:57,510 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:42:57,512 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:42:57,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:42:57,517 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:42:57,518 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:42:57,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:42:57,525 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:42:57,528 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:42:57,530 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:42:57,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:42:57,534 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:42:57,539 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:42:57,540 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:42:57,540 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:42:57,542 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:42:57,543 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:42:57,545 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:42:57,545 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:42:57,547 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:42:57,548 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:42:57,550 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:42:57,551 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:42:57,552 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:42:57,553 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:42:57,554 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:42:57,554 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:42:57,556 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:42:57,557 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:42:57,558 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:42:57,590 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:42:57,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:42:57,591 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:42:57,591 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:42:57,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:42:57,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:42:57,594 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:42:57,594 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:42:57,594 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:42:57,595 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:42:57,595 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:42:57,595 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:42:57,596 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:42:57,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:42:57,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:42:57,597 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:42:57,597 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:42:57,597 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:42:57,598 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:42:57,598 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:42:57,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:42:57,599 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:42:57,599 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:42:57,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:42:57,600 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:42:57,600 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:42:57,600 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:42:57,601 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:42:57,601 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:42:57,601 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:42:57,602 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:42:57,602 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:42:57,602 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:42:57,602 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:42:57,603 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_d6800512-1047-4c80-a13e-210197218ee4/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55a25aaba499ad6f05f5b24cde70628308432569fd1f75e76cd806a685179688 [2021-11-13 17:42:57,945 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:42:57,982 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:42:57,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:42:57,988 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:42:57,989 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:42:57,992 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label05.c [2021-11-13 17:42:58,112 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/data/70a4b10de/2012eacac4f3419f9407010c39cc669e/FLAG9bf974595 [2021-11-13 17:42:59,206 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:42:59,208 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label05.c [2021-11-13 17:42:59,292 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/data/70a4b10de/2012eacac4f3419f9407010c39cc669e/FLAG9bf974595 [2021-11-13 17:42:59,632 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/data/70a4b10de/2012eacac4f3419f9407010c39cc669e [2021-11-13 17:42:59,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:42:59,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:42:59,638 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:42:59,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:42:59,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:42:59,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:42:59" (1/1) ... [2021-11-13 17:42:59,645 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74d911ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:42:59, skipping insertion in model container [2021-11-13 17:42:59,646 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:42:59" (1/1) ... [2021-11-13 17:42:59,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:42:59,846 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:43:00,377 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_d6800512-1047-4c80-a13e-210197218ee4/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label05.c[6391,6404] [2021-11-13 17:43:00,507 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_d6800512-1047-4c80-a13e-210197218ee4/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label05.c[13327,13340] [2021-11-13 17:43:01,783 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:43:01,804 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:43:01,852 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_d6800512-1047-4c80-a13e-210197218ee4/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label05.c[6391,6404] [2021-11-13 17:43:01,876 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_d6800512-1047-4c80-a13e-210197218ee4/sv-benchmarks/c/combinations/pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label05.c[13327,13340] [2021-11-13 17:43:02,593 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:43:02,632 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:43:02,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:43:02 WrapperNode [2021-11-13 17:43:02,632 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:43:02,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:43:02,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:43:02,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:43:02,644 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:43:02" (1/1) ... [2021-11-13 17:43:02,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:43:02" (1/1) ... [2021-11-13 17:43:03,277 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:43:03,279 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:43:03,279 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:43:03,279 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:43:03,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:43:02" (1/1) ... [2021-11-13 17:43:03,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:43:02" (1/1) ... [2021-11-13 17:43:03,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:43:02" (1/1) ... [2021-11-13 17:43:03,378 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:43:02" (1/1) ... [2021-11-13 17:43:03,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:43:02" (1/1) ... [2021-11-13 17:43:03,642 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:43:02" (1/1) ... [2021-11-13 17:43:03,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:43:02" (1/1) ... [2021-11-13 17:43:03,727 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:43:03,729 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:43:03,730 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:43:03,730 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:43:03,731 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:43:02" (1/1) ... [2021-11-13 17:43:03,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:43:03,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:43:03,781 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:43:03,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:43:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:43:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:43:03,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:43:03,843 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:43:09,395 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:43:09,395 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-13 17:43:09,399 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:43:09 BoogieIcfgContainer [2021-11-13 17:43:09,400 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:43:09,402 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:43:09,402 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:43:09,406 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:43:09,407 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:42:59" (1/3) ... [2021-11-13 17:43:09,408 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1713c17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:43:09, skipping insertion in model container [2021-11-13 17:43:09,408 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:43:02" (2/3) ... [2021-11-13 17:43:09,409 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1713c17d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:43:09, skipping insertion in model container [2021-11-13 17:43:09,409 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:43:09" (3/3) ... [2021-11-13 17:43:09,410 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals+Problem12_label05.c [2021-11-13 17:43:09,417 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:43:09,417 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 17:43:09,485 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:43:09,493 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 17:43:09,494 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 17:43:09,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 0 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 17:43:09,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 17:43:09,546 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:09,547 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] [2021-11-13 17:43:09,548 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:09,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:09,555 INFO L85 PathProgramCache]: Analyzing trace with hash 975463267, now seen corresponding path program 1 times [2021-11-13 17:43:09,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:09,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138909007] [2021-11-13 17:43:09,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:09,569 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:09,814 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 17:43:09,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:09,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138909007] [2021-11-13 17:43:09,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138909007] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:09,817 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:09,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:43:09,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449050055] [2021-11-13 17:43:09,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:09,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 17:43:09,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:09,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 17:43:09,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:43:09,879 INFO L87 Difference]: Start difference. First operand has 878 states, 875 states have (on average 1.904) internal successors, (1666), 877 states have internal predecessors, (1666), 0 states have call successors, (0), 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 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 17:43:10,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:10,013 INFO L93 Difference]: Finished difference Result 1734 states and 3292 transitions. [2021-11-13 17:43:10,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 17:43:10,016 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-13 17:43:10,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:10,046 INFO L225 Difference]: With dead ends: 1734 [2021-11-13 17:43:10,046 INFO L226 Difference]: Without dead ends: 812 [2021-11-13 17:43:10,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:43:10,060 INFO L933 BasicCegarLoop]: 1600 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 18.83ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:10,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1600 Invalid, 0 Unknown, 0 Unchecked, 18.83ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 17:43:10,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-11-13 17:43:10,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 812. [2021-11-13 17:43:10,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8925925925925926) internal successors, (1533), 811 states have internal predecessors, (1533), 0 states have call successors, (0), 0 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 17:43:10,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1533 transitions. [2021-11-13 17:43:10,206 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1533 transitions. Word has length 26 [2021-11-13 17:43:10,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:10,207 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1533 transitions. [2021-11-13 17:43:10,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 13.0) internal successors, (26), 2 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 17:43:10,207 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1533 transitions. [2021-11-13 17:43:10,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-13 17:43:10,209 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:10,209 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] [2021-11-13 17:43:10,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:43:10,210 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:10,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:10,212 INFO L85 PathProgramCache]: Analyzing trace with hash 157814817, now seen corresponding path program 1 times [2021-11-13 17:43:10,212 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:10,212 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058499421] [2021-11-13 17:43:10,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:10,213 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:10,348 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 17:43:10,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:10,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058499421] [2021-11-13 17:43:10,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058499421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:10,349 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:10,349 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:43:10,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64575231] [2021-11-13 17:43:10,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:10,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:43:10,351 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:10,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:43:10,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:43:10,353 INFO L87 Difference]: Start difference. First operand 812 states and 1533 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 17:43:10,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:10,603 INFO L93 Difference]: Finished difference Result 888 states and 1649 transitions. [2021-11-13 17:43:10,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:43:10,604 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 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 26 [2021-11-13 17:43:10,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:10,613 INFO L225 Difference]: With dead ends: 888 [2021-11-13 17:43:10,623 INFO L226 Difference]: Without dead ends: 848 [2021-11-13 17:43:10,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:43:10,626 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 58 mSDsluCounter, 4566 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 6095 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 39.86ms SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 84.38ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:10,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 6095 Invalid, 36 Unknown, 0 Unchecked, 39.86ms Time], IncrementalHoareTripleChecker [16 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 84.38ms Time] [2021-11-13 17:43:10,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2021-11-13 17:43:10,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 812. [2021-11-13 17:43:10,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 812 states, 810 states have (on average 1.8728395061728396) internal successors, (1517), 811 states have internal predecessors, (1517), 0 states have call successors, (0), 0 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 17:43:10,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1517 transitions. [2021-11-13 17:43:10,698 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1517 transitions. Word has length 26 [2021-11-13 17:43:10,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:10,698 INFO L470 AbstractCegarLoop]: Abstraction has 812 states and 1517 transitions. [2021-11-13 17:43:10,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 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 17:43:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1517 transitions. [2021-11-13 17:43:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 17:43:10,701 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:10,701 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:43:10,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:43:10,702 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:10,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:10,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1324654887, now seen corresponding path program 1 times [2021-11-13 17:43:10,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:10,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216196040] [2021-11-13 17:43:10,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:10,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:10,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:10,851 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 17:43:10,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:10,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216196040] [2021-11-13 17:43:10,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216196040] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:10,853 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:10,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:43:10,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470618197] [2021-11-13 17:43:10,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:10,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:43:10,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:10,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:43:10,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:43:10,856 INFO L87 Difference]: Start difference. First operand 812 states and 1517 transitions. Second operand has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 17:43:10,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:10,910 INFO L93 Difference]: Finished difference Result 878 states and 1619 transitions. [2021-11-13 17:43:10,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:43:10,911 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-11-13 17:43:10,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:10,919 INFO L225 Difference]: With dead ends: 878 [2021-11-13 17:43:10,920 INFO L226 Difference]: Without dead ends: 842 [2021-11-13 17:43:10,921 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 17:43:10,923 INFO L933 BasicCegarLoop]: 1559 mSDtfsCounter, 1485 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.32ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1485 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.86ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.53ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:10,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1485 Valid, 1613 Invalid, 7 Unknown, 0 Unchecked, 10.86ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 13.53ms Time] [2021-11-13 17:43:10,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 842 states. [2021-11-13 17:43:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 842 to 840. [2021-11-13 17:43:10,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 838 states have (on average 1.8627684964200477) internal successors, (1561), 839 states have internal predecessors, (1561), 0 states have call successors, (0), 0 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 17:43:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 1561 transitions. [2021-11-13 17:43:10,967 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 1561 transitions. Word has length 41 [2021-11-13 17:43:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:10,968 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 1561 transitions. [2021-11-13 17:43:10,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.666666666666666) internal successors, (41), 3 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 17:43:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 1561 transitions. [2021-11-13 17:43:10,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-13 17:43:10,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:10,972 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:43:10,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:43:10,972 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:10,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:10,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1376027727, now seen corresponding path program 1 times [2021-11-13 17:43:10,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:10,974 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577495889] [2021-11-13 17:43:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:10,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:11,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:11,153 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 17:43:11,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:11,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577495889] [2021-11-13 17:43:11,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577495889] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:11,156 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:11,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:43:11,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837813587] [2021-11-13 17:43:11,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:11,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:43:11,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:11,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:43:11,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:43:11,161 INFO L87 Difference]: Start difference. First operand 840 states and 1561 transitions. Second operand has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 17:43:11,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:11,370 INFO L93 Difference]: Finished difference Result 1224 states and 2161 transitions. [2021-11-13 17:43:11,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:43:11,371 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 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 41 [2021-11-13 17:43:11,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:11,382 INFO L225 Difference]: With dead ends: 1224 [2021-11-13 17:43:11,382 INFO L226 Difference]: Without dead ends: 1160 [2021-11-13 17:43:11,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:43:11,395 INFO L933 BasicCegarLoop]: 1511 mSDtfsCounter, 4709 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 60.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4709 SdHoareTripleChecker+Valid, 1779 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 21.47ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.67ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:11,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4709 Valid, 1779 Invalid, 52 Unknown, 0 Unchecked, 21.47ms Time], IncrementalHoareTripleChecker [9 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 78.67ms Time] [2021-11-13 17:43:11,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-11-13 17:43:11,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 902. [2021-11-13 17:43:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 900 states have (on average 1.84) internal successors, (1656), 901 states have internal predecessors, (1656), 0 states have call successors, (0), 0 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 17:43:11,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1656 transitions. [2021-11-13 17:43:11,451 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1656 transitions. Word has length 41 [2021-11-13 17:43:11,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:11,452 INFO L470 AbstractCegarLoop]: Abstraction has 902 states and 1656 transitions. [2021-11-13 17:43:11,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.2) internal successors, (41), 5 states have internal predecessors, (41), 0 states have call successors, (0), 0 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 17:43:11,453 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1656 transitions. [2021-11-13 17:43:11,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 17:43:11,462 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:11,462 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:43:11,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:43:11,464 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:11,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:11,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1902982177, now seen corresponding path program 1 times [2021-11-13 17:43:11,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:11,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240110796] [2021-11-13 17:43:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:11,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:11,615 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 17:43:11,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:11,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240110796] [2021-11-13 17:43:11,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240110796] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:11,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:11,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:43:11,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442511611] [2021-11-13 17:43:11,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:11,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:43:11,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:11,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:43:11,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:43:11,622 INFO L87 Difference]: Start difference. First operand 902 states and 1656 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 17:43:11,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:11,687 INFO L93 Difference]: Finished difference Result 1089 states and 1943 transitions. [2021-11-13 17:43:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:43:11,688 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-13 17:43:11,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:11,697 INFO L225 Difference]: With dead ends: 1089 [2021-11-13 17:43:11,697 INFO L226 Difference]: Without dead ends: 963 [2021-11-13 17:43:11,699 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 17:43:11,703 INFO L933 BasicCegarLoop]: 1514 mSDtfsCounter, 1469 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.83ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1469 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.43ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.61ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:11,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1469 Valid, 1565 Invalid, 11 Unknown, 0 Unchecked, 7.43ms Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 18.61ms Time] [2021-11-13 17:43:11,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-13 17:43:11,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2021-11-13 17:43:11,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8185610010427529) internal successors, (1744), 960 states have internal predecessors, (1744), 0 states have call successors, (0), 0 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 17:43:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1744 transitions. [2021-11-13 17:43:11,798 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1744 transitions. Word has length 43 [2021-11-13 17:43:11,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:11,799 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1744 transitions. [2021-11-13 17:43:11,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 17:43:11,799 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1744 transitions. [2021-11-13 17:43:11,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 17:43:11,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:11,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:43:11,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-13 17:43:11,802 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:11,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:11,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1836488665, now seen corresponding path program 1 times [2021-11-13 17:43:11,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:11,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017495554] [2021-11-13 17:43:11,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:11,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:11,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:11,964 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 17:43:11,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:11,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017495554] [2021-11-13 17:43:11,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017495554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:11,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:11,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:43:11,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870620733] [2021-11-13 17:43:11,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:11,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:43:11,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:11,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:43:11,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:43:11,967 INFO L87 Difference]: Start difference. First operand 961 states and 1744 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 17:43:12,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:12,104 INFO L93 Difference]: Finished difference Result 1146 states and 2026 transitions. [2021-11-13 17:43:12,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:43:12,104 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-13 17:43:12,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:12,113 INFO L225 Difference]: With dead ends: 1146 [2021-11-13 17:43:12,114 INFO L226 Difference]: Without dead ends: 963 [2021-11-13 17:43:12,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:43:12,117 INFO L933 BasicCegarLoop]: 1529 mSDtfsCounter, 1528 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.31ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1528 SdHoareTripleChecker+Valid, 1685 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 8.82ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.51ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:12,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1528 Valid, 1685 Invalid, 40 Unknown, 0 Unchecked, 8.82ms Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 41.51ms Time] [2021-11-13 17:43:12,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2021-11-13 17:43:12,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 961. [2021-11-13 17:43:12,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 961 states, 959 states have (on average 1.8154327424400416) internal successors, (1741), 960 states have internal predecessors, (1741), 0 states have call successors, (0), 0 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 17:43:12,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1741 transitions. [2021-11-13 17:43:12,158 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1741 transitions. Word has length 43 [2021-11-13 17:43:12,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:12,159 INFO L470 AbstractCegarLoop]: Abstraction has 961 states and 1741 transitions. [2021-11-13 17:43:12,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 17:43:12,159 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1741 transitions. [2021-11-13 17:43:12,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 17:43:12,161 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:12,162 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:43:12,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:43:12,162 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:12,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:12,164 INFO L85 PathProgramCache]: Analyzing trace with hash -47574589, now seen corresponding path program 1 times [2021-11-13 17:43:12,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:12,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057803306] [2021-11-13 17:43:12,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:12,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:12,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:12,273 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 17:43:12,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:12,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057803306] [2021-11-13 17:43:12,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057803306] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:12,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:12,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:43:12,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587869568] [2021-11-13 17:43:12,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:12,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:43:12,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:12,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:43:12,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:43:12,279 INFO L87 Difference]: Start difference. First operand 961 states and 1741 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 17:43:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:12,335 INFO L93 Difference]: Finished difference Result 1291 states and 2237 transitions. [2021-11-13 17:43:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:43:12,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-13 17:43:12,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:12,347 INFO L225 Difference]: With dead ends: 1291 [2021-11-13 17:43:12,347 INFO L226 Difference]: Without dead ends: 1108 [2021-11-13 17:43:12,348 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 17:43:12,349 INFO L933 BasicCegarLoop]: 1541 mSDtfsCounter, 1477 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1477 SdHoareTripleChecker+Valid, 1603 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.78ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.41ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:12,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1477 Valid, 1603 Invalid, 7 Unknown, 0 Unchecked, 5.78ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 12.41ms Time] [2021-11-13 17:43:12,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-11-13 17:43:12,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 1106. [2021-11-13 17:43:12,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1106 states, 1104 states have (on average 1.7681159420289856) internal successors, (1952), 1105 states have internal predecessors, (1952), 0 states have call successors, (0), 0 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 17:43:12,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1106 states to 1106 states and 1952 transitions. [2021-11-13 17:43:12,408 INFO L78 Accepts]: Start accepts. Automaton has 1106 states and 1952 transitions. Word has length 43 [2021-11-13 17:43:12,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:12,410 INFO L470 AbstractCegarLoop]: Abstraction has 1106 states and 1952 transitions. [2021-11-13 17:43:12,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 17:43:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1106 states and 1952 transitions. [2021-11-13 17:43:12,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-13 17:43:12,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:12,412 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:43:12,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-13 17:43:12,413 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:12,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:12,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1199933027, now seen corresponding path program 1 times [2021-11-13 17:43:12,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:12,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67277565] [2021-11-13 17:43:12,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:12,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:12,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:12,475 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 17:43:12,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:12,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67277565] [2021-11-13 17:43:12,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67277565] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:12,476 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:12,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:43:12,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434272803] [2021-11-13 17:43:12,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:12,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:43:12,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:12,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:43:12,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:43:12,479 INFO L87 Difference]: Start difference. First operand 1106 states and 1952 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 17:43:12,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:12,549 INFO L93 Difference]: Finished difference Result 1690 states and 2810 transitions. [2021-11-13 17:43:12,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:43:12,550 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 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 43 [2021-11-13 17:43:12,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:12,561 INFO L225 Difference]: With dead ends: 1690 [2021-11-13 17:43:12,562 INFO L226 Difference]: Without dead ends: 1362 [2021-11-13 17:43:12,563 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 17:43:12,564 INFO L933 BasicCegarLoop]: 1554 mSDtfsCounter, 1481 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.89ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 1612 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 5.28ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.63ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:12,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 1612 Invalid, 7 Unknown, 0 Unchecked, 5.28ms Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 11.63ms Time] [2021-11-13 17:43:12,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2021-11-13 17:43:12,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1360. [2021-11-13 17:43:12,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1358 states have (on average 1.6995581737849779) internal successors, (2308), 1359 states have internal predecessors, (2308), 0 states have call successors, (0), 0 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 17:43:12,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 2308 transitions. [2021-11-13 17:43:12,642 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 2308 transitions. Word has length 43 [2021-11-13 17:43:12,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:12,644 INFO L470 AbstractCegarLoop]: Abstraction has 1360 states and 2308 transitions. [2021-11-13 17:43:12,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 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 17:43:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 2308 transitions. [2021-11-13 17:43:12,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-13 17:43:12,646 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:12,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:43:12,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-13 17:43:12,648 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:12,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:12,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1511296967, now seen corresponding path program 1 times [2021-11-13 17:43:12,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:12,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851031666] [2021-11-13 17:43:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:12,657 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:12,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:12,771 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 17:43:12,771 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:12,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851031666] [2021-11-13 17:43:12,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851031666] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:12,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:12,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:43:12,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237036539] [2021-11-13 17:43:12,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:12,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:43:12,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:12,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:43:12,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:43:12,776 INFO L87 Difference]: Start difference. First operand 1360 states and 2308 transitions. Second operand has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 17:43:12,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:12,932 INFO L93 Difference]: Finished difference Result 1883 states and 3036 transitions. [2021-11-13 17:43:12,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:43:12,933 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 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 44 [2021-11-13 17:43:12,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:12,949 INFO L225 Difference]: With dead ends: 1883 [2021-11-13 17:43:12,949 INFO L226 Difference]: Without dead ends: 1881 [2021-11-13 17:43:12,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 17:43:12,953 INFO L933 BasicCegarLoop]: 1534 mSDtfsCounter, 139 mSDsluCounter, 4544 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 6078 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.45ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.82ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:12,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 6078 Invalid, 21 Unknown, 0 Unchecked, 11.45ms Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 20.82ms Time] [2021-11-13 17:43:12,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2021-11-13 17:43:13,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1408. [2021-11-13 17:43:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1408 states, 1406 states have (on average 1.6728307254623045) internal successors, (2352), 1407 states have internal predecessors, (2352), 0 states have call successors, (0), 0 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 17:43:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1408 states to 1408 states and 2352 transitions. [2021-11-13 17:43:13,045 INFO L78 Accepts]: Start accepts. Automaton has 1408 states and 2352 transitions. Word has length 44 [2021-11-13 17:43:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:13,046 INFO L470 AbstractCegarLoop]: Abstraction has 1408 states and 2352 transitions. [2021-11-13 17:43:13,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.8) internal successors, (44), 5 states have internal predecessors, (44), 0 states have call successors, (0), 0 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 17:43:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 1408 states and 2352 transitions. [2021-11-13 17:43:13,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-13 17:43:13,048 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:13,050 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:43:13,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 17:43:13,050 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:13,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1100178715, now seen corresponding path program 1 times [2021-11-13 17:43:13,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:13,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482679088] [2021-11-13 17:43:13,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:13,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:13,176 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 17:43:13,176 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:13,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482679088] [2021-11-13 17:43:13,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482679088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:13,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:13,177 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:43:13,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586240400] [2021-11-13 17:43:13,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:13,179 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:43:13,179 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:13,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:43:13,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:43:13,180 INFO L87 Difference]: Start difference. First operand 1408 states and 2352 transitions. Second operand has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 17:43:22,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:22,841 INFO L93 Difference]: Finished difference Result 3663 states and 6661 transitions. [2021-11-13 17:43:22,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 17:43:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 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 60 [2021-11-13 17:43:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:22,863 INFO L225 Difference]: With dead ends: 3663 [2021-11-13 17:43:22,863 INFO L226 Difference]: Without dead ends: 2910 [2021-11-13 17:43:22,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:43:22,866 INFO L933 BasicCegarLoop]: 753 mSDtfsCounter, 2341 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5354 mSolverCounterSat, 1161 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7816.59ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 2341 SdHoareTripleChecker+Valid, 771 SdHoareTripleChecker+Invalid, 6515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 37.60ms SdHoareTripleChecker+Time, 1161 IncrementalHoareTripleChecker+Valid, 5354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9305.48ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:22,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2341 Valid, 771 Invalid, 6515 Unknown, 0 Unchecked, 37.60ms Time], IncrementalHoareTripleChecker [1161 Valid, 5354 Invalid, 0 Unknown, 0 Unchecked, 9305.48ms Time] [2021-11-13 17:43:22,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2910 states. [2021-11-13 17:43:22,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2910 to 2910. [2021-11-13 17:43:22,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2910 states, 2908 states have (on average 1.5357634112792298) internal successors, (4466), 2909 states have internal predecessors, (4466), 0 states have call successors, (0), 0 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 17:43:23,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2910 states to 2910 states and 4466 transitions. [2021-11-13 17:43:23,007 INFO L78 Accepts]: Start accepts. Automaton has 2910 states and 4466 transitions. Word has length 60 [2021-11-13 17:43:23,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:23,008 INFO L470 AbstractCegarLoop]: Abstraction has 2910 states and 4466 transitions. [2021-11-13 17:43:23,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.0) internal successors, (60), 3 states have internal predecessors, (60), 0 states have call successors, (0), 0 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 17:43:23,009 INFO L276 IsEmpty]: Start isEmpty. Operand 2910 states and 4466 transitions. [2021-11-13 17:43:23,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 17:43:23,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:23,011 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:43:23,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 17:43:23,012 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:23,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:23,013 INFO L85 PathProgramCache]: Analyzing trace with hash -213997176, now seen corresponding path program 1 times [2021-11-13 17:43:23,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:23,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948326933] [2021-11-13 17:43:23,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:23,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:23,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:23,134 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 17:43:23,135 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:23,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948326933] [2021-11-13 17:43:23,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948326933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:23,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:23,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:43:23,136 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908192989] [2021-11-13 17:43:23,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:23,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:43:23,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:23,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:43:23,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:43:23,139 INFO L87 Difference]: Start difference. First operand 2910 states and 4466 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 17:43:23,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:23,381 INFO L93 Difference]: Finished difference Result 4938 states and 7314 transitions. [2021-11-13 17:43:23,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:43:23,382 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-13 17:43:23,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:23,412 INFO L225 Difference]: With dead ends: 4938 [2021-11-13 17:43:23,413 INFO L226 Difference]: Without dead ends: 4308 [2021-11-13 17:43:23,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:43:23,417 INFO L933 BasicCegarLoop]: 1563 mSDtfsCounter, 3075 mSDsluCounter, 1614 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 34.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3075 SdHoareTripleChecker+Valid, 3177 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.00ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.45ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:23,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3075 Valid, 3177 Invalid, 38 Unknown, 0 Unchecked, 7.00ms Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 41.45ms Time] [2021-11-13 17:43:23,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4308 states. [2021-11-13 17:43:23,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4308 to 3538. [2021-11-13 17:43:23,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3538 states, 3536 states have (on average 1.5107466063348416) internal successors, (5342), 3537 states have internal predecessors, (5342), 0 states have call successors, (0), 0 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 17:43:23,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3538 states to 3538 states and 5342 transitions. [2021-11-13 17:43:23,608 INFO L78 Accepts]: Start accepts. Automaton has 3538 states and 5342 transitions. Word has length 64 [2021-11-13 17:43:23,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:23,608 INFO L470 AbstractCegarLoop]: Abstraction has 3538 states and 5342 transitions. [2021-11-13 17:43:23,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 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 17:43:23,609 INFO L276 IsEmpty]: Start isEmpty. Operand 3538 states and 5342 transitions. [2021-11-13 17:43:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 17:43:23,610 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:23,611 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:43:23,611 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-13 17:43:23,611 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:23,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:23,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1033510440, now seen corresponding path program 1 times [2021-11-13 17:43:23,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:23,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676560131] [2021-11-13 17:43:23,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:23,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:23,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-13 17:43:23,677 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:23,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676560131] [2021-11-13 17:43:23,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676560131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:23,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:23,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:43:23,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607069052] [2021-11-13 17:43:23,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:23,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:43:23,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:23,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:43:23,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:43:23,681 INFO L87 Difference]: Start difference. First operand 3538 states and 5342 transitions. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:43:23,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:23,942 INFO L93 Difference]: Finished difference Result 5566 states and 8190 transitions. [2021-11-13 17:43:23,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:43:23,943 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-13 17:43:23,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:23,976 INFO L225 Difference]: With dead ends: 5566 [2021-11-13 17:43:23,976 INFO L226 Difference]: Without dead ends: 4936 [2021-11-13 17:43:23,979 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:43:23,980 INFO L933 BasicCegarLoop]: 1564 mSDtfsCounter, 3067 mSDsluCounter, 1639 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.26ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3067 SdHoareTripleChecker+Valid, 3203 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.52ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 36.61ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:23,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3067 Valid, 3203 Invalid, 40 Unknown, 0 Unchecked, 6.52ms Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 36.61ms Time] [2021-11-13 17:43:23,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4936 states. [2021-11-13 17:43:24,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4936 to 4482. [2021-11-13 17:43:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4482 states, 4480 states have (on average 1.4834821428571427) internal successors, (6646), 4481 states have internal predecessors, (6646), 0 states have call successors, (0), 0 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 17:43:24,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4482 states to 4482 states and 6646 transitions. [2021-11-13 17:43:24,246 INFO L78 Accepts]: Start accepts. Automaton has 4482 states and 6646 transitions. Word has length 64 [2021-11-13 17:43:24,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:24,247 INFO L470 AbstractCegarLoop]: Abstraction has 4482 states and 6646 transitions. [2021-11-13 17:43:24,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:43:24,247 INFO L276 IsEmpty]: Start isEmpty. Operand 4482 states and 6646 transitions. [2021-11-13 17:43:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-13 17:43:24,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:24,249 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:43:24,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-13 17:43:24,249 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:24,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:24,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1792023874, now seen corresponding path program 1 times [2021-11-13 17:43:24,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:24,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200066518] [2021-11-13 17:43:24,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:24,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:24,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 17:43:24,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:24,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200066518] [2021-11-13 17:43:24,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200066518] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:24,463 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:24,463 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:43:24,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041964609] [2021-11-13 17:43:24,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:24,464 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:43:24,464 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:24,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:43:24,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:43:24,464 INFO L87 Difference]: Start difference. First operand 4482 states and 6646 transitions. Second operand has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 17:43:24,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:24,798 INFO L93 Difference]: Finished difference Result 5834 states and 8570 transitions. [2021-11-13 17:43:24,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:43:24,799 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-11-13 17:43:24,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:24,836 INFO L225 Difference]: With dead ends: 5834 [2021-11-13 17:43:24,845 INFO L226 Difference]: Without dead ends: 5384 [2021-11-13 17:43:24,848 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:43:24,849 INFO L933 BasicCegarLoop]: 1562 mSDtfsCounter, 3064 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 41.72ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3064 SdHoareTripleChecker+Valid, 3189 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.90ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 56.11ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:24,850 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3064 Valid, 3189 Invalid, 52 Unknown, 0 Unchecked, 6.90ms Time], IncrementalHoareTripleChecker [2 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 56.11ms Time] [2021-11-13 17:43:24,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5384 states. [2021-11-13 17:43:25,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5384 to 4930. [2021-11-13 17:43:25,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4928 states have (on average 1.4768668831168832) internal successors, (7278), 4929 states have internal predecessors, (7278), 0 states have call successors, (0), 0 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 17:43:25,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 7278 transitions. [2021-11-13 17:43:25,177 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 7278 transitions. Word has length 64 [2021-11-13 17:43:25,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:25,178 INFO L470 AbstractCegarLoop]: Abstraction has 4930 states and 7278 transitions. [2021-11-13 17:43:25,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.6) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 17:43:25,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 7278 transitions. [2021-11-13 17:43:25,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 17:43:25,188 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:25,188 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 17:43:25,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-13 17:43:25,189 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:25,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:25,190 INFO L85 PathProgramCache]: Analyzing trace with hash 322769619, now seen corresponding path program 1 times [2021-11-13 17:43:25,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:25,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722830940] [2021-11-13 17:43:25,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:25,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:43:25,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:25,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722830940] [2021-11-13 17:43:25,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722830940] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:25,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:25,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:43:25,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836432463] [2021-11-13 17:43:25,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:25,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:43:25,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:25,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:43:25,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:43:25,262 INFO L87 Difference]: Start difference. First operand 4930 states and 7278 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 17:43:25,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:25,503 INFO L93 Difference]: Finished difference Result 7582 states and 10980 transitions. [2021-11-13 17:43:25,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:43:25,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-13 17:43:25,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:25,517 INFO L225 Difference]: With dead ends: 7582 [2021-11-13 17:43:25,517 INFO L226 Difference]: Without dead ends: 4932 [2021-11-13 17:43:25,523 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 17:43:25,524 INFO L933 BasicCegarLoop]: 1538 mSDtfsCounter, 33 mSDsluCounter, 1504 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.84ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 3042 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.50ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.26ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:25,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 3042 Invalid, 6 Unknown, 0 Unchecked, 2.50ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 9.26ms Time] [2021-11-13 17:43:25,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2021-11-13 17:43:25,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 4930. [2021-11-13 17:43:25,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4930 states, 4928 states have (on average 1.4667207792207793) internal successors, (7228), 4929 states have internal predecessors, (7228), 0 states have call successors, (0), 0 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 17:43:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4930 states to 4930 states and 7228 transitions. [2021-11-13 17:43:25,799 INFO L78 Accepts]: Start accepts. Automaton has 4930 states and 7228 transitions. Word has length 65 [2021-11-13 17:43:25,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:25,799 INFO L470 AbstractCegarLoop]: Abstraction has 4930 states and 7228 transitions. [2021-11-13 17:43:25,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 17:43:25,800 INFO L276 IsEmpty]: Start isEmpty. Operand 4930 states and 7228 transitions. [2021-11-13 17:43:25,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 17:43:25,801 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:25,802 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 17:43:25,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-13 17:43:25,802 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:25,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:25,803 INFO L85 PathProgramCache]: Analyzing trace with hash 235650825, now seen corresponding path program 1 times [2021-11-13 17:43:25,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:25,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746357569] [2021-11-13 17:43:25,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:25,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:25,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:43:25,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:25,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746357569] [2021-11-13 17:43:25,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746357569] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:43:25,871 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:43:25,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:43:25,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239248523] [2021-11-13 17:43:25,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:43:25,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:43:25,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:25,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:43:25,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:43:25,873 INFO L87 Difference]: Start difference. First operand 4930 states and 7228 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 17:43:26,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:26,007 INFO L93 Difference]: Finished difference Result 6258 states and 9055 transitions. [2021-11-13 17:43:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:43:26,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-13 17:43:26,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:26,017 INFO L225 Difference]: With dead ends: 6258 [2021-11-13 17:43:26,018 INFO L226 Difference]: Without dead ends: 3608 [2021-11-13 17:43:26,025 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 17:43:26,027 INFO L933 BasicCegarLoop]: 1531 mSDtfsCounter, 29 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.02ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 3027 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.48ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.48ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:26,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 3027 Invalid, 6 Unknown, 0 Unchecked, 2.48ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 9.48ms Time] [2021-11-13 17:43:26,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3608 states. [2021-11-13 17:43:26,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3608 to 3606. [2021-11-13 17:43:26,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3604 states have (on average 1.4922308546059933) internal successors, (5378), 3605 states have internal predecessors, (5378), 0 states have call successors, (0), 0 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 17:43:26,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 5378 transitions. [2021-11-13 17:43:26,327 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 5378 transitions. Word has length 65 [2021-11-13 17:43:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:26,327 INFO L470 AbstractCegarLoop]: Abstraction has 3606 states and 5378 transitions. [2021-11-13 17:43:26,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 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 17:43:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 5378 transitions. [2021-11-13 17:43:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-13 17:43:26,329 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:26,329 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:43:26,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-13 17:43:26,330 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:26,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:26,331 INFO L85 PathProgramCache]: Analyzing trace with hash -883624385, now seen corresponding path program 1 times [2021-11-13 17:43:26,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:26,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017657270] [2021-11-13 17:43:26,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:26,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:26,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:26,759 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:43:26,759 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:26,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017657270] [2021-11-13 17:43:26,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017657270] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:43:26,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96293303] [2021-11-13 17:43:26,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:26,760 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:43:26,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:43:26,771 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:43:26,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:43:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:26,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-13 17:43:26,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:43:27,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:43:27,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:43:28,047 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:43:28,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96293303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:43:28,048 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:43:28,049 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 6] total 23 [2021-11-13 17:43:28,049 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670592350] [2021-11-13 17:43:28,049 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:43:28,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-13 17:43:28,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:28,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-13 17:43:28,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-11-13 17:43:28,052 INFO L87 Difference]: Start difference. First operand 3606 states and 5378 transitions. Second operand has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 17:43:41,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:43:41,063 INFO L93 Difference]: Finished difference Result 22411 states and 30385 transitions. [2021-11-13 17:43:41,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2021-11-13 17:43:41,064 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 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 65 [2021-11-13 17:43:41,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:43:41,122 INFO L225 Difference]: With dead ends: 22411 [2021-11-13 17:43:41,123 INFO L226 Difference]: Without dead ends: 20861 [2021-11-13 17:43:41,152 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17700 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=5018, Invalid=36802, Unknown=0, NotChecked=0, Total=41820 [2021-11-13 17:43:41,153 INFO L933 BasicCegarLoop]: 1582 mSDtfsCounter, 15574 mSDsluCounter, 10069 mSDsCounter, 0 mSdLazyCounter, 3133 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2561.61ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 15574 SdHoareTripleChecker+Valid, 11651 SdHoareTripleChecker+Invalid, 3618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 49.03ms SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 3133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3134.13ms IncrementalHoareTripleChecker+Time [2021-11-13 17:43:41,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15574 Valid, 11651 Invalid, 3618 Unknown, 0 Unchecked, 49.03ms Time], IncrementalHoareTripleChecker [485 Valid, 3133 Invalid, 0 Unknown, 0 Unchecked, 3134.13ms Time] [2021-11-13 17:43:41,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20861 states. [2021-11-13 17:43:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20861 to 14682. [2021-11-13 17:43:42,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14682 states, 14680 states have (on average 1.356607629427793) internal successors, (19915), 14681 states have internal predecessors, (19915), 0 states have call successors, (0), 0 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 17:43:42,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14682 states to 14682 states and 19915 transitions. [2021-11-13 17:43:42,500 INFO L78 Accepts]: Start accepts. Automaton has 14682 states and 19915 transitions. Word has length 65 [2021-11-13 17:43:42,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:43:42,501 INFO L470 AbstractCegarLoop]: Abstraction has 14682 states and 19915 transitions. [2021-11-13 17:43:42,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.913043478260869) internal successors, (182), 23 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 17:43:42,501 INFO L276 IsEmpty]: Start isEmpty. Operand 14682 states and 19915 transitions. [2021-11-13 17:43:42,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 17:43:42,503 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:43:42,504 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 17:43:42,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-13 17:43:42,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-13 17:43:42,719 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:43:42,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:43:42,720 INFO L85 PathProgramCache]: Analyzing trace with hash 752221610, now seen corresponding path program 1 times [2021-11-13 17:43:42,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:43:42,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219194703] [2021-11-13 17:43:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:42,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:43:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:42,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:43:42,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:43:42,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219194703] [2021-11-13 17:43:42,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219194703] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:43:42,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647270891] [2021-11-13 17:43:42,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:43:42,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:43:42,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:43:42,967 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:43:42,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:43:43,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:43:43,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-13 17:43:43,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:43:44,417 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:43:44,418 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:43:45,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:43:45,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647270891] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:43:45,378 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:43:45,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2021-11-13 17:43:45,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220174706] [2021-11-13 17:43:45,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:43:45,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-13 17:43:45,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:43:45,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-13 17:43:45,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=527, Unknown=0, NotChecked=0, Total=600 [2021-11-13 17:43:45,380 INFO L87 Difference]: Start difference. First operand 14682 states and 19915 transitions. Second operand has 25 states, 25 states have (on average 6.64) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 17:44:08,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:44:08,371 INFO L93 Difference]: Finished difference Result 178539 states and 232654 transitions. [2021-11-13 17:44:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-13 17:44:08,372 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-13 17:44:08,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:44:08,917 INFO L225 Difference]: With dead ends: 178539 [2021-11-13 17:44:08,917 INFO L226 Difference]: Without dead ends: 166137 [2021-11-13 17:44:09,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7739 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3290, Invalid=19060, Unknown=0, NotChecked=0, Total=22350 [2021-11-13 17:44:09,003 INFO L933 BasicCegarLoop]: 1610 mSDtfsCounter, 25464 mSDsluCounter, 8816 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 405 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1642.04ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25464 SdHoareTripleChecker+Valid, 10426 SdHoareTripleChecker+Invalid, 2194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.75ms SdHoareTripleChecker+Time, 405 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1951.04ms IncrementalHoareTripleChecker+Time [2021-11-13 17:44:09,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25464 Valid, 10426 Invalid, 2194 Unknown, 0 Unchecked, 47.75ms Time], IncrementalHoareTripleChecker [405 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 1951.04ms Time] [2021-11-13 17:44:09,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166137 states. [2021-11-13 17:44:17,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166137 to 65289. [2021-11-13 17:44:17,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65289 states, 65287 states have (on average 1.303383521987532) internal successors, (85094), 65288 states have internal predecessors, (85094), 0 states have call successors, (0), 0 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 17:44:18,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65289 states to 65289 states and 85094 transitions. [2021-11-13 17:44:18,070 INFO L78 Accepts]: Start accepts. Automaton has 65289 states and 85094 transitions. Word has length 66 [2021-11-13 17:44:18,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:44:18,071 INFO L470 AbstractCegarLoop]: Abstraction has 65289 states and 85094 transitions. [2021-11-13 17:44:18,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.64) internal successors, (166), 24 states have internal predecessors, (166), 0 states have call successors, (0), 0 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 17:44:18,071 INFO L276 IsEmpty]: Start isEmpty. Operand 65289 states and 85094 transitions. [2021-11-13 17:44:18,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 17:44:18,075 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:44:18,075 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:44:18,127 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:44:18,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-13 17:44:18,299 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:44:18,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:44:18,300 INFO L85 PathProgramCache]: Analyzing trace with hash -434236462, now seen corresponding path program 1 times [2021-11-13 17:44:18,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:44:18,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560440735] [2021-11-13 17:44:18,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:44:18,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:44:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:44:18,362 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:44:18,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:44:18,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560440735] [2021-11-13 17:44:18,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560440735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:44:18,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:44:18,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:44:18,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897476749] [2021-11-13 17:44:18,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:44:18,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:44:18,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:44:18,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:44:18,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:44:18,366 INFO L87 Difference]: Start difference. First operand 65289 states and 85094 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:44:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:44:21,471 INFO L93 Difference]: Finished difference Result 93342 states and 121344 transitions. [2021-11-13 17:44:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:44:21,471 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-13 17:44:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:44:21,532 INFO L225 Difference]: With dead ends: 93342 [2021-11-13 17:44:21,533 INFO L226 Difference]: Without dead ends: 30333 [2021-11-13 17:44:21,597 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 17:44:21,598 INFO L933 BasicCegarLoop]: 1525 mSDtfsCounter, 17 mSDsluCounter, 1496 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3021 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.25ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.83ms IncrementalHoareTripleChecker+Time [2021-11-13 17:44:21,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 3021 Invalid, 6 Unknown, 0 Unchecked, 2.25ms Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 9.83ms Time] [2021-11-13 17:44:21,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30333 states. [2021-11-13 17:44:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30333 to 27032. [2021-11-13 17:44:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27032 states, 27030 states have (on average 1.2947465778764335) internal successors, (34997), 27031 states have internal predecessors, (34997), 0 states have call successors, (0), 0 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 17:44:24,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27032 states to 27032 states and 34997 transitions. [2021-11-13 17:44:24,719 INFO L78 Accepts]: Start accepts. Automaton has 27032 states and 34997 transitions. Word has length 66 [2021-11-13 17:44:24,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:44:24,719 INFO L470 AbstractCegarLoop]: Abstraction has 27032 states and 34997 transitions. [2021-11-13 17:44:24,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:44:24,720 INFO L276 IsEmpty]: Start isEmpty. Operand 27032 states and 34997 transitions. [2021-11-13 17:44:24,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 17:44:24,723 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:44:24,723 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 17:44:24,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-13 17:44:24,724 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:44:24,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:44:24,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1433407838, now seen corresponding path program 1 times [2021-11-13 17:44:24,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:44:24,725 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926427153] [2021-11-13 17:44:24,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:44:24,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:44:24,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:44:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 17:44:24,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:44:24,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926427153] [2021-11-13 17:44:24,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926427153] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:44:24,793 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:44:24,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:44:24,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406288760] [2021-11-13 17:44:24,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:44:24,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:44:24,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:44:24,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:44:24,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:44:24,796 INFO L87 Difference]: Start difference. First operand 27032 states and 34997 transitions. Second operand has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 17:44:26,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:44:26,230 INFO L93 Difference]: Finished difference Result 39759 states and 51399 transitions. [2021-11-13 17:44:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:44:26,231 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-13 17:44:26,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:44:26,255 INFO L225 Difference]: With dead ends: 39759 [2021-11-13 17:44:26,256 INFO L226 Difference]: Without dead ends: 15084 [2021-11-13 17:44:26,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:44:26,281 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4541 mSDsluCounter, 1464 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 39.86ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4541 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.35ms SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 48.08ms IncrementalHoareTripleChecker+Time [2021-11-13 17:44:26,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4541 Valid, 2954 Invalid, 41 Unknown, 0 Unchecked, 7.35ms Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 48.08ms Time] [2021-11-13 17:44:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15084 states. [2021-11-13 17:44:28,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15084 to 15084. [2021-11-13 17:44:28,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15084 states, 15082 states have (on average 1.3059939000132608) internal successors, (19697), 15083 states have internal predecessors, (19697), 0 states have call successors, (0), 0 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 17:44:28,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15084 states to 15084 states and 19697 transitions. [2021-11-13 17:44:28,143 INFO L78 Accepts]: Start accepts. Automaton has 15084 states and 19697 transitions. Word has length 66 [2021-11-13 17:44:28,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:44:28,143 INFO L470 AbstractCegarLoop]: Abstraction has 15084 states and 19697 transitions. [2021-11-13 17:44:28,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.5) internal successors, (63), 5 states have internal predecessors, (63), 0 states have call successors, (0), 0 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 17:44:28,144 INFO L276 IsEmpty]: Start isEmpty. Operand 15084 states and 19697 transitions. [2021-11-13 17:44:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 17:44:28,146 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:44:28,146 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 17:44:28,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-13 17:44:28,147 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:44:28,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:44:28,148 INFO L85 PathProgramCache]: Analyzing trace with hash 1275703454, now seen corresponding path program 1 times [2021-11-13 17:44:28,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:44:28,148 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781727283] [2021-11-13 17:44:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:44:28,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:44:28,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:44:28,217 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-13 17:44:28,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:44:28,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781727283] [2021-11-13 17:44:28,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781727283] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:44:28,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:44:28,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:44:28,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405669981] [2021-11-13 17:44:28,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:44:28,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:44:28,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:44:28,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:44:28,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:44:28,221 INFO L87 Difference]: Start difference. First operand 15084 states and 19697 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:44:29,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:44:29,800 INFO L93 Difference]: Finished difference Result 24644 states and 31750 transitions. [2021-11-13 17:44:29,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:44:29,801 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-13 17:44:29,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:44:29,815 INFO L225 Difference]: With dead ends: 24644 [2021-11-13 17:44:29,815 INFO L226 Difference]: Without dead ends: 11931 [2021-11-13 17:44:29,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:44:29,831 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4504 mSDsluCounter, 1469 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.88ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4504 SdHoareTripleChecker+Valid, 2959 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 6.82ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 51.67ms IncrementalHoareTripleChecker+Time [2021-11-13 17:44:29,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4504 Valid, 2959 Invalid, 43 Unknown, 0 Unchecked, 6.82ms Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 51.67ms Time] [2021-11-13 17:44:29,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11931 states. [2021-11-13 17:44:30,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11931 to 11931. [2021-11-13 17:44:30,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11931 states, 11929 states have (on average 1.2989353675915836) internal successors, (15495), 11930 states have internal predecessors, (15495), 0 states have call successors, (0), 0 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 17:44:30,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11931 states to 11931 states and 15495 transitions. [2021-11-13 17:44:30,969 INFO L78 Accepts]: Start accepts. Automaton has 11931 states and 15495 transitions. Word has length 66 [2021-11-13 17:44:30,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:44:30,969 INFO L470 AbstractCegarLoop]: Abstraction has 11931 states and 15495 transitions. [2021-11-13 17:44:30,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:44:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 11931 states and 15495 transitions. [2021-11-13 17:44:30,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-13 17:44:30,971 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:44:30,971 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 17:44:30,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-13 17:44:30,971 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:44:30,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:44:30,972 INFO L85 PathProgramCache]: Analyzing trace with hash -1486365826, now seen corresponding path program 1 times [2021-11-13 17:44:30,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:44:30,972 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70888005] [2021-11-13 17:44:30,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:44:30,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:44:30,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:44:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-13 17:44:31,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:44:31,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70888005] [2021-11-13 17:44:31,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70888005] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:44:31,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:44:31,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:44:31,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795405372] [2021-11-13 17:44:31,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:44:31,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:44:31,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:44:31,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:44:31,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:44:31,038 INFO L87 Difference]: Start difference. First operand 11931 states and 15495 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 17:44:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:44:33,270 INFO L93 Difference]: Finished difference Result 27353 states and 34766 transitions. [2021-11-13 17:44:33,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:44:33,270 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-13 17:44:33,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:44:33,291 INFO L225 Difference]: With dead ends: 27353 [2021-11-13 17:44:33,291 INFO L226 Difference]: Without dead ends: 17734 [2021-11-13 17:44:33,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-13 17:44:33,300 INFO L933 BasicCegarLoop]: 1490 mSDtfsCounter, 4632 mSDsluCounter, 1535 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 68.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4632 SdHoareTripleChecker+Valid, 3025 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 7.24ms SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 89.10ms IncrementalHoareTripleChecker+Time [2021-11-13 17:44:33,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4632 Valid, 3025 Invalid, 92 Unknown, 0 Unchecked, 7.24ms Time], IncrementalHoareTripleChecker [9 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 89.10ms Time] [2021-11-13 17:44:33,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17734 states. [2021-11-13 17:44:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17734 to 16304. [2021-11-13 17:44:34,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16304 states, 16302 states have (on average 1.2753649858913017) internal successors, (20791), 16303 states have internal predecessors, (20791), 0 states have call successors, (0), 0 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 17:44:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16304 states to 16304 states and 20791 transitions. [2021-11-13 17:44:34,944 INFO L78 Accepts]: Start accepts. Automaton has 16304 states and 20791 transitions. Word has length 66 [2021-11-13 17:44:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:44:34,944 INFO L470 AbstractCegarLoop]: Abstraction has 16304 states and 20791 transitions. [2021-11-13 17:44:34,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 5 states have internal predecessors, (61), 0 states have call successors, (0), 0 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 17:44:34,945 INFO L276 IsEmpty]: Start isEmpty. Operand 16304 states and 20791 transitions. [2021-11-13 17:44:34,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-13 17:44:34,947 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:44:34,948 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:44:34,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-13 17:44:34,948 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:44:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:44:34,949 INFO L85 PathProgramCache]: Analyzing trace with hash -791645332, now seen corresponding path program 1 times [2021-11-13 17:44:34,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:44:34,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741969424] [2021-11-13 17:44:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:44:34,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:44:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:44:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:44:35,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:44:35,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741969424] [2021-11-13 17:44:35,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741969424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:44:35,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805645846] [2021-11-13 17:44:35,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:44:35,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:44:35,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:44:35,502 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:44:35,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:44:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:44:35,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-13 17:44:35,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:44:37,611 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:44:37,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:44:39,094 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:44:39,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805645846] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:44:39,095 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:44:39,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2021-11-13 17:44:39,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153154033] [2021-11-13 17:44:39,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:44:39,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-13 17:44:39,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:44:39,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-13 17:44:39,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=952, Unknown=0, NotChecked=0, Total=1056 [2021-11-13 17:44:39,097 INFO L87 Difference]: Start difference. First operand 16304 states and 20791 transitions. Second operand has 33 states, 33 states have (on average 5.545454545454546) internal successors, (183), 33 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 17:44:53,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:44:53,224 INFO L93 Difference]: Finished difference Result 36917 states and 45550 transitions. [2021-11-13 17:44:53,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-13 17:44:53,228 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.545454545454546) internal successors, (183), 33 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-13 17:44:53,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:44:53,265 INFO L225 Difference]: With dead ends: 36917 [2021-11-13 17:44:53,265 INFO L226 Difference]: Without dead ends: 28041 [2021-11-13 17:44:53,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3347 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=2020, Invalid=10190, Unknown=0, NotChecked=0, Total=12210 [2021-11-13 17:44:53,274 INFO L933 BasicCegarLoop]: 1694 mSDtfsCounter, 10346 mSDsluCounter, 25084 mSDsCounter, 0 mSdLazyCounter, 1269 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1080.97ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10346 SdHoareTripleChecker+Valid, 26778 SdHoareTripleChecker+Invalid, 1384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 47.08ms SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1259.05ms IncrementalHoareTripleChecker+Time [2021-11-13 17:44:53,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10346 Valid, 26778 Invalid, 1384 Unknown, 0 Unchecked, 47.08ms Time], IncrementalHoareTripleChecker [115 Valid, 1269 Invalid, 0 Unknown, 0 Unchecked, 1259.05ms Time] [2021-11-13 17:44:53,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28041 states. [2021-11-13 17:44:54,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28041 to 13289. [2021-11-13 17:44:54,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13289 states, 13287 states have (on average 1.2803492135169714) internal successors, (17012), 13288 states have internal predecessors, (17012), 0 states have call successors, (0), 0 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 17:44:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13289 states to 13289 states and 17012 transitions. [2021-11-13 17:44:54,993 INFO L78 Accepts]: Start accepts. Automaton has 13289 states and 17012 transitions. Word has length 67 [2021-11-13 17:44:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:44:54,994 INFO L470 AbstractCegarLoop]: Abstraction has 13289 states and 17012 transitions. [2021-11-13 17:44:54,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.545454545454546) internal successors, (183), 33 states have internal predecessors, (183), 0 states have call successors, (0), 0 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 17:44:54,994 INFO L276 IsEmpty]: Start isEmpty. Operand 13289 states and 17012 transitions. [2021-11-13 17:44:54,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-13 17:44:54,996 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:44:54,996 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-13 17:44:55,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:44:55,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:44:55,197 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:44:55,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:44:55,198 INFO L85 PathProgramCache]: Analyzing trace with hash -2141886399, now seen corresponding path program 1 times [2021-11-13 17:44:55,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:44:55,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776484837] [2021-11-13 17:44:55,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:44:55,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:44:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:44:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:44:55,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:44:55,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776484837] [2021-11-13 17:44:55,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776484837] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:44:55,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746923643] [2021-11-13 17:44:55,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:44:55,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:44:55,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:44:55,713 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:44:55,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:44:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:44:56,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-13 17:44:56,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:01,985 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:01,985 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:45:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:14,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746923643] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:45:14,566 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:45:14,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 24, 23] total 56 [2021-11-13 17:45:14,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899335448] [2021-11-13 17:45:14,567 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:45:14,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-13 17:45:14,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:45:14,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-13 17:45:14,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=2832, Unknown=0, NotChecked=0, Total=3080 [2021-11-13 17:45:14,570 INFO L87 Difference]: Start difference. First operand 13289 states and 17012 transitions. Second operand has 56 states, 56 states have (on average 3.25) internal successors, (182), 56 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 17:45:43,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:45:43,650 INFO L93 Difference]: Finished difference Result 40892 states and 49965 transitions. [2021-11-13 17:45:43,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-13 17:45:43,650 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.25) internal successors, (182), 56 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-13 17:45:43,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:45:43,688 INFO L225 Difference]: With dead ends: 40892 [2021-11-13 17:45:43,688 INFO L226 Difference]: Without dead ends: 33187 [2021-11-13 17:45:43,698 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8820 ImplicationChecksByTransitivity, 23.5s TimeCoverageRelationStatistics Valid=3676, Invalid=26080, Unknown=0, NotChecked=0, Total=29756 [2021-11-13 17:45:43,699 INFO L933 BasicCegarLoop]: 1747 mSDtfsCounter, 25837 mSDsluCounter, 38584 mSDsCounter, 0 mSdLazyCounter, 3304 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3372.78ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 25837 SdHoareTripleChecker+Valid, 40331 SdHoareTripleChecker+Invalid, 3566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 110.02ms SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 3304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3846.08ms IncrementalHoareTripleChecker+Time [2021-11-13 17:45:43,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25837 Valid, 40331 Invalid, 3566 Unknown, 0 Unchecked, 110.02ms Time], IncrementalHoareTripleChecker [262 Valid, 3304 Invalid, 0 Unknown, 0 Unchecked, 3846.08ms Time] [2021-11-13 17:45:43,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33187 states. [2021-11-13 17:45:44,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33187 to 8786. [2021-11-13 17:45:44,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8786 states, 8784 states have (on average 1.3195582877959928) internal successors, (11591), 8785 states have internal predecessors, (11591), 0 states have call successors, (0), 0 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 17:45:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8786 states to 8786 states and 11591 transitions. [2021-11-13 17:45:44,988 INFO L78 Accepts]: Start accepts. Automaton has 8786 states and 11591 transitions. Word has length 68 [2021-11-13 17:45:44,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:45:44,989 INFO L470 AbstractCegarLoop]: Abstraction has 8786 states and 11591 transitions. [2021-11-13 17:45:44,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.25) internal successors, (182), 56 states have internal predecessors, (182), 0 states have call successors, (0), 0 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 17:45:44,989 INFO L276 IsEmpty]: Start isEmpty. Operand 8786 states and 11591 transitions. [2021-11-13 17:45:44,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-13 17:45:44,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:45:44,993 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:45:45,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 17:45:45,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:45:45,215 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:45:45,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:45:45,215 INFO L85 PathProgramCache]: Analyzing trace with hash 301141095, now seen corresponding path program 1 times [2021-11-13 17:45:45,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:45:45,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368600209] [2021-11-13 17:45:45,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:45,216 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:45:45,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:45,573 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 39 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:45,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:45:45,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368600209] [2021-11-13 17:45:45,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368600209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:45:45,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436956651] [2021-11-13 17:45:45,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:45:45,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:45:45,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:45:45,575 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:45:45,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6800512-1047-4c80-a13e-210197218ee4/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-13 17:45:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:45:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-13 17:45:45,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:45:47,684 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 33 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:47,684 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:45:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 31 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:45:50,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [436956651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:45:50,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:45:50,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 12] total 36 [2021-11-13 17:45:50,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406536933] [2021-11-13 17:45:50,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:45:50,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-13 17:45:50,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:45:50,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-13 17:45:50,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2021-11-13 17:45:50,817 INFO L87 Difference]: Start difference. First operand 8786 states and 11591 transitions. Second operand has 36 states, 36 states have (on average 8.444444444444445) internal successors, (304), 36 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)