./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF --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 81b1f0d7bc9c0822a8207cacf976d5f28113ec35347c6e8d0beebb39e2d17414 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:04:38,460 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:04:38,463 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:04:38,503 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:04:38,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:04:38,506 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:04:38,508 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:04:38,510 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:04:38,513 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:04:38,514 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:04:38,516 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:04:38,518 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:04:38,518 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:04:38,520 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:04:38,522 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:04:38,524 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:04:38,525 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:04:38,527 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:04:38,529 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:04:38,532 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:04:38,534 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:04:38,536 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:04:38,538 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:04:38,539 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:04:38,543 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:04:38,544 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:04:38,544 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:04:38,546 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:04:38,546 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:04:38,548 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:04:38,549 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:04:38,550 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:04:38,551 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:04:38,552 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:04:38,554 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:04:38,555 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:04:38,556 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:04:38,556 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:04:38,557 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:04:38,558 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:04:38,559 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:04:38,561 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:04:38,610 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:04:38,614 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:04:38,615 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:04:38,615 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:04:38,623 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:04:38,625 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:04:38,626 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:04:38,626 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:04:38,627 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:04:38,627 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:04:38,628 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:04:38,629 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:04:38,629 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:04:38,629 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:04:38,629 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:04:38,630 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:04:38,630 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:04:38,630 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:04:38,630 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:04:38,631 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:04:38,631 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:04:38,632 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:04:38,638 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:04:38,638 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:04:38,638 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:04:38,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:04:38,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:04:38,641 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:04:38,641 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:04:38,641 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:04:38,641 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:04:38,644 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:04:38,644 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:04:38,644 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:04:38,645 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_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 81b1f0d7bc9c0822a8207cacf976d5f28113ec35347c6e8d0beebb39e2d17414 [2021-11-20 06:04:38,917 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:04:38,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:04:38,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:04:38,956 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:04:38,957 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:04:38,959 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c [2021-11-20 06:04:39,031 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/data/e53fa4896/dc52de6dbb36464bb4140d53a28e322e/FLAG201ce6ca4 [2021-11-20 06:04:40,039 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:04:40,040 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c [2021-11-20 06:04:40,108 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/data/e53fa4896/dc52de6dbb36464bb4140d53a28e322e/FLAG201ce6ca4 [2021-11-20 06:04:40,503 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/data/e53fa4896/dc52de6dbb36464bb4140d53a28e322e [2021-11-20 06:04:40,509 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:04:40,511 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:04:40,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:04:40,526 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:04:40,530 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:04:40,531 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:04:40" (1/1) ... [2021-11-20 06:04:40,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@264f1771 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:40, skipping insertion in model container [2021-11-20 06:04:40,533 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:04:40" (1/1) ... [2021-11-20 06:04:40,542 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:04:40,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:04:43,554 WARN L230 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_3222e34d-9e42-4d70-a036-25fbd98e40ec/sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c[382357,382370] [2021-11-20 06:04:43,589 WARN L230 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_3222e34d-9e42-4d70-a036-25fbd98e40ec/sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c[383339,383352] [2021-11-20 06:04:43,833 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:04:43,845 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:04:45,104 WARN L230 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_3222e34d-9e42-4d70-a036-25fbd98e40ec/sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c[382357,382370] [2021-11-20 06:04:45,109 WARN L230 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_3222e34d-9e42-4d70-a036-25fbd98e40ec/sv-benchmarks/c/combinations/Problem05_label46+token_ring.03.cil-2.c[383339,383352] [2021-11-20 06:04:45,142 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:04:45,220 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:04:45,220 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:45 WrapperNode [2021-11-20 06:04:45,221 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:04:45,222 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:04:45,223 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:04:45,223 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:04:45,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:45" (1/1) ... [2021-11-20 06:04:45,412 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:45" (1/1) ... [2021-11-20 06:04:46,077 INFO L137 Inliner]: procedures = 50, calls = 50, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 12677 [2021-11-20 06:04:46,077 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:04:46,078 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:04:46,079 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:04:46,079 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:04:46,087 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:45" (1/1) ... [2021-11-20 06:04:46,088 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:45" (1/1) ... [2021-11-20 06:04:46,178 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:45" (1/1) ... [2021-11-20 06:04:46,178 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:45" (1/1) ... [2021-11-20 06:04:46,421 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:45" (1/1) ... [2021-11-20 06:04:46,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:45" (1/1) ... [2021-11-20 06:04:46,501 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:45" (1/1) ... [2021-11-20 06:04:46,548 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:04:46,549 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:04:46,550 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:04:46,550 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:04:46,551 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:45" (1/1) ... [2021-11-20 06:04:46,558 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:04:46,568 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:04:46,583 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:04:46,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:04:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:04:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-20 06:04:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-20 06:04:46,629 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-20 06:04:46,629 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-20 06:04:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-20 06:04:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-20 06:04:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-20 06:04:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-20 06:04:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-20 06:04:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-20 06:04:46,630 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-20 06:04:46,630 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-20 06:04:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:04:46,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:04:46,631 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:04:46,805 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:04:46,807 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:04:54,365 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:04:54,412 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:04:54,412 INFO L301 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-20 06:04:54,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:04:54 BoogieIcfgContainer [2021-11-20 06:04:54,419 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:04:54,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:04:54,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:04:54,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:04:54,425 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:04:40" (1/3) ... [2021-11-20 06:04:54,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6707e283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:04:54, skipping insertion in model container [2021-11-20 06:04:54,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:04:45" (2/3) ... [2021-11-20 06:04:54,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6707e283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:04:54, skipping insertion in model container [2021-11-20 06:04:54,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:04:54" (3/3) ... [2021-11-20 06:04:54,430 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.03.cil-2.c [2021-11-20 06:04:54,439 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:04:54,439 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-20 06:04:54,520 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:04:54,528 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 [2021-11-20 06:04:54,529 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-20 06:04:54,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-20 06:04:54,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 06:04:54,617 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:54,618 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:54,619 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:54,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:54,624 INFO L85 PathProgramCache]: Analyzing trace with hash 200056068, now seen corresponding path program 1 times [2021-11-20 06:04:54,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:54,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109218953] [2021-11-20 06:04:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:54,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:54,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:04:54,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:54,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:04:54,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:54,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:04:54,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:55,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:04:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:55,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:04:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:55,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:55,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:55,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109218953] [2021-11-20 06:04:55,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109218953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:55,061 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:55,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:04:55,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850251554] [2021-11-20 06:04:55,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:55,068 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:04:55,068 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:55,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:04:55,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:04:55,103 INFO L87 Difference]: Start difference. First operand has 2340 states, 2314 states have (on average 1.8556611927398445) internal successors, (4294), 2317 states have internal predecessors, (4294), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:04:56,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:56,643 INFO L93 Difference]: Finished difference Result 4899 states and 9012 transitions. [2021-11-20 06:04:56,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:04:56,646 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-11-20 06:04:56,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:56,685 INFO L225 Difference]: With dead ends: 4899 [2021-11-20 06:04:56,685 INFO L226 Difference]: Without dead ends: 2500 [2021-11-20 06:04:56,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:04:56,702 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4543 mSDsluCounter, 12503 mSDsCounter, 0 mSdLazyCounter, 667 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4553 SdHoareTripleChecker+Valid, 16790 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 667 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:56,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4553 Valid, 16790 Invalid, 747 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [80 Valid, 667 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:04:56,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2500 states. [2021-11-20 06:04:56,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2500 to 2415. [2021-11-20 06:04:56,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2371 states have (on average 1.8291859974694222) internal successors, (4337), 2374 states have internal predecessors, (4337), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-11-20 06:04:56,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4398 transitions. [2021-11-20 06:04:56,935 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4398 transitions. Word has length 79 [2021-11-20 06:04:56,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:56,937 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 4398 transitions. [2021-11-20 06:04:56,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:04:56,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4398 transitions. [2021-11-20 06:04:56,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 06:04:56,957 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:56,957 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:56,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:04:56,958 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:56,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:56,964 INFO L85 PathProgramCache]: Analyzing trace with hash 437104264, now seen corresponding path program 1 times [2021-11-20 06:04:56,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:56,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75805945] [2021-11-20 06:04:56,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:56,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:57,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:04:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:57,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:04:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:57,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:04:57,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:57,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:04:57,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:57,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:04:57,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:57,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:57,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:57,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75805945] [2021-11-20 06:04:57,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75805945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:57,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:57,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:04:57,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716648627] [2021-11-20 06:04:57,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:57,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:04:57,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:57,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:04:57,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:04:57,200 INFO L87 Difference]: Start difference. First operand 2415 states and 4398 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:04:58,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:58,015 INFO L93 Difference]: Finished difference Result 2787 states and 4973 transitions. [2021-11-20 06:04:58,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-20 06:04:58,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-11-20 06:04:58,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:58,039 INFO L225 Difference]: With dead ends: 2787 [2021-11-20 06:04:58,039 INFO L226 Difference]: Without dead ends: 2504 [2021-11-20 06:04:58,044 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:04:58,046 INFO L933 BasicCegarLoop]: 4180 mSDtfsCounter, 4337 mSDsluCounter, 16192 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4348 SdHoareTripleChecker+Valid, 20372 SdHoareTripleChecker+Invalid, 593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:58,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4348 Valid, 20372 Invalid, 593 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [59 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-20 06:04:58,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2504 states. [2021-11-20 06:04:58,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2504 to 2415. [2021-11-20 06:04:58,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2415 states, 2371 states have (on average 1.8283424715309995) internal successors, (4335), 2374 states have internal predecessors, (4335), 29 states have call successors, (29), 12 states have call predecessors, (29), 13 states have return successors, (32), 29 states have call predecessors, (32), 29 states have call successors, (32) [2021-11-20 06:04:58,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2415 states to 2415 states and 4396 transitions. [2021-11-20 06:04:58,147 INFO L78 Accepts]: Start accepts. Automaton has 2415 states and 4396 transitions. Word has length 79 [2021-11-20 06:04:58,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:58,147 INFO L470 AbstractCegarLoop]: Abstraction has 2415 states and 4396 transitions. [2021-11-20 06:04:58,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:04:58,148 INFO L276 IsEmpty]: Start isEmpty. Operand 2415 states and 4396 transitions. [2021-11-20 06:04:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 06:04:58,153 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:58,154 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:58,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 06:04:58,155 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:58,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:58,156 INFO L85 PathProgramCache]: Analyzing trace with hash 382711366, now seen corresponding path program 1 times [2021-11-20 06:04:58,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:58,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665293683] [2021-11-20 06:04:58,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:58,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:58,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:04:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:58,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:04:58,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:58,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:04:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:58,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:04:58,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:58,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:04:58,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:58,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:58,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:58,354 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665293683] [2021-11-20 06:04:58,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665293683] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:58,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:58,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:04:58,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539327114] [2021-11-20 06:04:58,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:58,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:04:58,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:58,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:04:58,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:04:58,356 INFO L87 Difference]: Start difference. First operand 2415 states and 4396 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:04:59,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:04:59,614 INFO L93 Difference]: Finished difference Result 2965 states and 5230 transitions. [2021-11-20 06:04:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:04:59,615 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-11-20 06:04:59,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:04:59,632 INFO L225 Difference]: With dead ends: 2965 [2021-11-20 06:04:59,632 INFO L226 Difference]: Without dead ends: 2682 [2021-11-20 06:04:59,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:04:59,643 INFO L933 BasicCegarLoop]: 4314 mSDtfsCounter, 4460 mSDsluCounter, 16595 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4470 SdHoareTripleChecker+Valid, 20909 SdHoareTripleChecker+Invalid, 1095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:04:59,644 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4470 Valid, 20909 Invalid, 1095 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [57 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:04:59,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2682 states. [2021-11-20 06:04:59,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2682 to 2548. [2021-11-20 06:04:59,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2485 states have (on average 1.8120724346076458) internal successors, (4503), 2489 states have internal predecessors, (4503), 41 states have call successors, (41), 18 states have call predecessors, (41), 20 states have return successors, (46), 42 states have call predecessors, (46), 41 states have call successors, (46) [2021-11-20 06:04:59,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 4590 transitions. [2021-11-20 06:04:59,755 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 4590 transitions. Word has length 79 [2021-11-20 06:04:59,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:04:59,757 INFO L470 AbstractCegarLoop]: Abstraction has 2548 states and 4590 transitions. [2021-11-20 06:04:59,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:04:59,757 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 4590 transitions. [2021-11-20 06:04:59,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 06:04:59,760 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:04:59,761 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:04:59,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-20 06:04:59,761 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:04:59,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:04:59,762 INFO L85 PathProgramCache]: Analyzing trace with hash -34685240, now seen corresponding path program 1 times [2021-11-20 06:04:59,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:04:59,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866006186] [2021-11-20 06:04:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:04:59,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:04:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:59,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:04:59,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:59,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:04:59,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:59,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:04:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:59,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:04:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:59,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:04:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:04:59,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:04:59,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:04:59,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866006186] [2021-11-20 06:04:59,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866006186] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:04:59,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:04:59,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:04:59,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913317891] [2021-11-20 06:04:59,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:04:59,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:04:59,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:04:59,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:04:59,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:04:59,918 INFO L87 Difference]: Start difference. First operand 2548 states and 4590 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:05:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:01,277 INFO L93 Difference]: Finished difference Result 3444 states and 5944 transitions. [2021-11-20 06:05:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-20 06:05:01,278 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-11-20 06:05:01,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:01,298 INFO L225 Difference]: With dead ends: 3444 [2021-11-20 06:05:01,299 INFO L226 Difference]: Without dead ends: 3028 [2021-11-20 06:05:01,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:05:01,312 INFO L933 BasicCegarLoop]: 4306 mSDtfsCounter, 4457 mSDsluCounter, 16591 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4467 SdHoareTripleChecker+Valid, 20897 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:01,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4467 Valid, 20897 Invalid, 1096 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [60 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:05:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3028 states. [2021-11-20 06:05:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3028 to 2816. [2021-11-20 06:05:01,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2816 states, 2715 states have (on average 1.7834254143646409) internal successors, (4842), 2721 states have internal predecessors, (4842), 65 states have call successors, (65), 30 states have call predecessors, (65), 34 states have return successors, (78), 68 states have call predecessors, (78), 65 states have call successors, (78) [2021-11-20 06:05:01,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2816 states to 2816 states and 4985 transitions. [2021-11-20 06:05:01,438 INFO L78 Accepts]: Start accepts. Automaton has 2816 states and 4985 transitions. Word has length 79 [2021-11-20 06:05:01,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:01,439 INFO L470 AbstractCegarLoop]: Abstraction has 2816 states and 4985 transitions. [2021-11-20 06:05:01,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:05:01,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2816 states and 4985 transitions. [2021-11-20 06:05:01,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 06:05:01,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:01,449 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:01,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-20 06:05:01,450 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:01,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:01,450 INFO L85 PathProgramCache]: Analyzing trace with hash 644587014, now seen corresponding path program 1 times [2021-11-20 06:05:01,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:01,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169439660] [2021-11-20 06:05:01,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:01,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:01,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:01,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:05:01,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:01,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:05:01,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:01,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:05:01,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:01,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:05:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:01,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:01,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:01,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:05:01,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:01,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169439660] [2021-11-20 06:05:01,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169439660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:01,589 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:01,590 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:05:01,590 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123102270] [2021-11-20 06:05:01,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:01,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:05:01,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:01,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:05:01,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:05:01,591 INFO L87 Difference]: Start difference. First operand 2816 states and 4985 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:05:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:02,987 INFO L93 Difference]: Finished difference Result 4578 states and 7629 transitions. [2021-11-20 06:05:02,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:05:02,988 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-11-20 06:05:02,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:03,019 INFO L225 Difference]: With dead ends: 4578 [2021-11-20 06:05:03,019 INFO L226 Difference]: Without dead ends: 3894 [2021-11-20 06:05:03,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:05:03,025 INFO L933 BasicCegarLoop]: 4300 mSDtfsCounter, 4588 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 1024 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4602 SdHoareTripleChecker+Valid, 20883 SdHoareTripleChecker+Invalid, 1089 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:03,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4602 Valid, 20883 Invalid, 1089 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [65 Valid, 1024 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:05:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3894 states. [2021-11-20 06:05:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3894 to 3342. [2021-11-20 06:05:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3342 states, 3169 states have (on average 1.7399810665825182) internal successors, (5514), 3179 states have internal predecessors, (5514), 109 states have call successors, (109), 54 states have call predecessors, (109), 62 states have return successors, (144), 116 states have call predecessors, (144), 109 states have call successors, (144) [2021-11-20 06:05:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3342 states to 3342 states and 5767 transitions. [2021-11-20 06:05:03,194 INFO L78 Accepts]: Start accepts. Automaton has 3342 states and 5767 transitions. Word has length 79 [2021-11-20 06:05:03,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:03,196 INFO L470 AbstractCegarLoop]: Abstraction has 3342 states and 5767 transitions. [2021-11-20 06:05:03,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:05:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 3342 states and 5767 transitions. [2021-11-20 06:05:03,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 06:05:03,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:03,205 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:03,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-20 06:05:03,205 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:03,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:03,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1688805624, now seen corresponding path program 1 times [2021-11-20 06:05:03,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:03,206 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210923044] [2021-11-20 06:05:03,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:03,207 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:03,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:03,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:05:03,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:03,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:05:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:03,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:05:03,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:03,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:05:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:03,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:03,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:03,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:05:03,311 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:03,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210923044] [2021-11-20 06:05:03,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210923044] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:03,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:03,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:05:03,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715905224] [2021-11-20 06:05:03,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:03,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:05:03,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:03,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:05:03,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:05:03,313 INFO L87 Difference]: Start difference. First operand 3342 states and 5767 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:05:04,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:04,764 INFO L93 Difference]: Finished difference Result 6510 states and 10517 transitions. [2021-11-20 06:05:04,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:05:04,765 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-11-20 06:05:04,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:04,900 INFO L225 Difference]: With dead ends: 6510 [2021-11-20 06:05:04,900 INFO L226 Difference]: Without dead ends: 5300 [2021-11-20 06:05:04,905 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:05:04,906 INFO L933 BasicCegarLoop]: 4337 mSDtfsCounter, 4474 mSDsluCounter, 16580 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4483 SdHoareTripleChecker+Valid, 20917 SdHoareTripleChecker+Invalid, 1224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:04,906 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4483 Valid, 20917 Invalid, 1224 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [65 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-11-20 06:05:04,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5300 states. [2021-11-20 06:05:05,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5300 to 4348. [2021-11-20 06:05:05,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4035 states have (on average 1.6837670384138785) internal successors, (6794), 4053 states have internal predecessors, (6794), 193 states have call successors, (193), 102 states have call predecessors, (193), 118 states have return successors, (290), 208 states have call predecessors, (290), 193 states have call successors, (290) [2021-11-20 06:05:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 7277 transitions. [2021-11-20 06:05:05,143 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 7277 transitions. Word has length 79 [2021-11-20 06:05:05,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:05,144 INFO L470 AbstractCegarLoop]: Abstraction has 4348 states and 7277 transitions. [2021-11-20 06:05:05,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:05:05,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 7277 transitions. [2021-11-20 06:05:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 06:05:05,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:05,149 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:05,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-20 06:05:05,149 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:05,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1486981690, now seen corresponding path program 1 times [2021-11-20 06:05:05,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:05,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785456171] [2021-11-20 06:05:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:05,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:05,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:05:05,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:05,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:05:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:05,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:05:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:05,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:05:05,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:05,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:05,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:05,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:05:05,251 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:05,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785456171] [2021-11-20 06:05:05,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785456171] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:05,252 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:05,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-20 06:05:05,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492488353] [2021-11-20 06:05:05,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:05,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-20 06:05:05,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:05,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-20 06:05:05,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:05:05,254 INFO L87 Difference]: Start difference. First operand 4348 states and 7277 transitions. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:05:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:06,716 INFO L93 Difference]: Finished difference Result 9866 states and 15579 transitions. [2021-11-20 06:05:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 06:05:06,717 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-11-20 06:05:06,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:06,764 INFO L225 Difference]: With dead ends: 9866 [2021-11-20 06:05:06,765 INFO L226 Difference]: Without dead ends: 7650 [2021-11-20 06:05:06,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-11-20 06:05:06,776 INFO L933 BasicCegarLoop]: 4287 mSDtfsCounter, 4465 mSDsluCounter, 16583 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4479 SdHoareTripleChecker+Valid, 20870 SdHoareTripleChecker+Invalid, 1060 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:06,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4479 Valid, 20870 Invalid, 1060 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [67 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-20 06:05:06,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7650 states. [2021-11-20 06:05:07,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7650 to 6407. [2021-11-20 06:05:07,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6407 states, 5822 states have (on average 1.6241841291652352) internal successors, (9456), 5856 states have internal predecessors, (9456), 353 states have call successors, (353), 198 states have call predecessors, (353), 230 states have return successors, (628), 384 states have call predecessors, (628), 353 states have call successors, (628) [2021-11-20 06:05:07,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6407 states to 6407 states and 10437 transitions. [2021-11-20 06:05:07,122 INFO L78 Accepts]: Start accepts. Automaton has 6407 states and 10437 transitions. Word has length 79 [2021-11-20 06:05:07,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:07,124 INFO L470 AbstractCegarLoop]: Abstraction has 6407 states and 10437 transitions. [2021-11-20 06:05:07,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 5 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:05:07,125 INFO L276 IsEmpty]: Start isEmpty. Operand 6407 states and 10437 transitions. [2021-11-20 06:05:07,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 06:05:07,131 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:07,132 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:07,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-20 06:05:07,132 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:07,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:07,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1053252604, now seen corresponding path program 1 times [2021-11-20 06:05:07,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:07,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036159429] [2021-11-20 06:05:07,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:07,134 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:07,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:05:07,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:07,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:05:07,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:07,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:05:07,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:07,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:05:07,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:07,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:07,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:05:07,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:07,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036159429] [2021-11-20 06:05:07,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036159429] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:07,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:05:07,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:05:07,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779554672] [2021-11-20 06:05:07,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:07,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:05:07,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:07,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:05:07,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:05:07,224 INFO L87 Difference]: Start difference. First operand 6407 states and 10437 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:05:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:08,782 INFO L93 Difference]: Finished difference Result 14332 states and 22441 transitions. [2021-11-20 06:05:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:05:08,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 79 [2021-11-20 06:05:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:08,823 INFO L225 Difference]: With dead ends: 14332 [2021-11-20 06:05:08,823 INFO L226 Difference]: Without dead ends: 10058 [2021-11-20 06:05:08,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:05:08,845 INFO L933 BasicCegarLoop]: 4385 mSDtfsCounter, 4628 mSDsluCounter, 12345 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4655 SdHoareTripleChecker+Valid, 16730 SdHoareTripleChecker+Invalid, 896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:08,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4655 Valid, 16730 Invalid, 896 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [89 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-20 06:05:08,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10058 states. [2021-11-20 06:05:09,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10058 to 8576. [2021-11-20 06:05:09,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8576 states, 7684 states have (on average 1.5802967204580947) internal successors, (12143), 7751 states have internal predecessors, (12143), 542 states have call successors, (542), 300 states have call predecessors, (542), 348 states have return successors, (899), 556 states have call predecessors, (899), 542 states have call successors, (899) [2021-11-20 06:05:09,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8576 states to 8576 states and 13584 transitions. [2021-11-20 06:05:09,388 INFO L78 Accepts]: Start accepts. Automaton has 8576 states and 13584 transitions. Word has length 79 [2021-11-20 06:05:09,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:09,390 INFO L470 AbstractCegarLoop]: Abstraction has 8576 states and 13584 transitions. [2021-11-20 06:05:09,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 4 states have internal predecessors, (69), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 06:05:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 8576 states and 13584 transitions. [2021-11-20 06:05:09,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:05:09,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:09,422 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:09,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-20 06:05:09,423 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:09,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:09,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1451529571, now seen corresponding path program 1 times [2021-11-20 06:05:09,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:09,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113204315] [2021-11-20 06:05:09,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:09,424 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:09,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:05:09,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:09,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:05:09,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:09,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:05:09,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:09,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:05:09,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:09,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:09,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:09,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:09,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:09,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-20 06:05:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:09,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:05:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:09,583 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:05:09,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:09,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113204315] [2021-11-20 06:05:09,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113204315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:09,584 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964565891] [2021-11-20 06:05:09,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:09,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:09,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:09,587 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:09,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:05:09,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:09,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 496 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:05:09,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:10,017 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-20 06:05:10,017 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:10,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964565891] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:10,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:10,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-20 06:05:10,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555437448] [2021-11-20 06:05:10,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:10,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:05:10,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:10,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:05:10,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:05:10,021 INFO L87 Difference]: Start difference. First operand 8576 states and 13584 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:05:10,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:10,738 INFO L93 Difference]: Finished difference Result 21283 states and 32724 transitions. [2021-11-20 06:05:10,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:05:10,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-11-20 06:05:10,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:10,803 INFO L225 Difference]: With dead ends: 21283 [2021-11-20 06:05:10,804 INFO L226 Difference]: Without dead ends: 14840 [2021-11-20 06:05:10,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:05:10,835 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4135 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4135 SdHoareTripleChecker+Valid, 4388 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:10,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4135 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:05:10,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14840 states. [2021-11-20 06:05:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14840 to 14738. [2021-11-20 06:05:11,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14738 states, 12986 states have (on average 1.5333436008008625) internal successors, (19912), 13118 states have internal predecessors, (19912), 1054 states have call successors, (1054), 600 states have call predecessors, (1054), 696 states have return successors, (1737), 1051 states have call predecessors, (1737), 1054 states have call successors, (1737) [2021-11-20 06:05:11,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14738 states to 14738 states and 22703 transitions. [2021-11-20 06:05:11,707 INFO L78 Accepts]: Start accepts. Automaton has 14738 states and 22703 transitions. Word has length 128 [2021-11-20 06:05:11,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:11,707 INFO L470 AbstractCegarLoop]: Abstraction has 14738 states and 22703 transitions. [2021-11-20 06:05:11,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 2 states have internal predecessors, (92), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:05:11,708 INFO L276 IsEmpty]: Start isEmpty. Operand 14738 states and 22703 transitions. [2021-11-20 06:05:11,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:05:11,741 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:11,742 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:11,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:11,966 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:11,966 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:11,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1829435325, now seen corresponding path program 1 times [2021-11-20 06:05:11,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:11,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078945445] [2021-11-20 06:05:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:11,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:11,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:05:11,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:05:12,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:05:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:05:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:12,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-20 06:05:12,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:05:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,101 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:05:12,101 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:12,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078945445] [2021-11-20 06:05:12,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078945445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:12,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782759764] [2021-11-20 06:05:12,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:12,102 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:12,102 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:12,103 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:12,126 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:05:12,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:12,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:05:12,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 06:05:12,522 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:12,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782759764] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:12,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:12,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-20 06:05:12,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865995193] [2021-11-20 06:05:12,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:12,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:05:12,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:12,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:05:12,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:05:12,525 INFO L87 Difference]: Start difference. First operand 14738 states and 22703 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:05:13,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:13,517 INFO L93 Difference]: Finished difference Result 39591 states and 60013 transitions. [2021-11-20 06:05:13,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:05:13,517 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 128 [2021-11-20 06:05:13,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:13,618 INFO L225 Difference]: With dead ends: 39591 [2021-11-20 06:05:13,619 INFO L226 Difference]: Without dead ends: 26986 [2021-11-20 06:05:13,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:05:13,661 INFO L933 BasicCegarLoop]: 4191 mSDtfsCounter, 4129 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4129 SdHoareTripleChecker+Valid, 4388 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:13,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4129 Valid, 4388 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:05:13,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26986 states. [2021-11-20 06:05:15,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26986 to 26784. [2021-11-20 06:05:15,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26784 states, 23338 states have (on average 1.501756791498843) internal successors, (35048), 23600 states have internal predecessors, (35048), 2052 states have call successors, (2052), 1200 states have call predecessors, (2052), 1392 states have return successors, (3387), 2015 states have call predecessors, (3387), 2052 states have call successors, (3387) [2021-11-20 06:05:15,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26784 states to 26784 states and 40487 transitions. [2021-11-20 06:05:15,158 INFO L78 Accepts]: Start accepts. Automaton has 26784 states and 40487 transitions. Word has length 128 [2021-11-20 06:05:15,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:15,158 INFO L470 AbstractCegarLoop]: Abstraction has 26784 states and 40487 transitions. [2021-11-20 06:05:15,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 2 states have internal predecessors, (98), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 06:05:15,159 INFO L276 IsEmpty]: Start isEmpty. Operand 26784 states and 40487 transitions. [2021-11-20 06:05:15,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-20 06:05:15,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:15,231 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:15,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:15,446 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 06:05:15,446 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:15,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:15,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1038951203, now seen corresponding path program 1 times [2021-11-20 06:05:15,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:15,447 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091732783] [2021-11-20 06:05:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:15,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:05:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:05:15,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:05:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:05:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-20 06:05:15,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2021-11-20 06:05:15,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,600 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 06:05:15,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:15,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091732783] [2021-11-20 06:05:15,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091732783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:15,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835812016] [2021-11-20 06:05:15,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:15,602 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:15,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:15,603 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:15,624 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:05:15,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:15,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:05:15,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:05:16,259 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:16,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835812016] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:16,260 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:16,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-20 06:05:16,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956950525] [2021-11-20 06:05:16,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:16,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:05:16,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:16,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:05:16,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:05:16,262 INFO L87 Difference]: Start difference. First operand 26784 states and 40487 transitions. Second operand has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:05:18,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:18,171 INFO L93 Difference]: Finished difference Result 75073 states and 113309 transitions. [2021-11-20 06:05:18,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:05:18,171 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 128 [2021-11-20 06:05:18,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:18,442 INFO L225 Difference]: With dead ends: 75073 [2021-11-20 06:05:18,442 INFO L226 Difference]: Without dead ends: 50423 [2021-11-20 06:05:18,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:05:18,507 INFO L933 BasicCegarLoop]: 4380 mSDtfsCounter, 193 mSDsluCounter, 4179 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 8559 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:18,507 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 8559 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:05:18,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50423 states. [2021-11-20 06:05:21,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50423 to 50423. [2021-11-20 06:05:21,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50423 states, 43670 states have (on average 1.477329974811083) internal successors, (64515), 44125 states have internal predecessors, (64515), 3967 states have call successors, (3967), 2400 states have call predecessors, (3967), 2784 states have return successors, (7350), 3961 states have call predecessors, (7350), 3967 states have call successors, (7350) [2021-11-20 06:05:21,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50423 states to 50423 states and 75832 transitions. [2021-11-20 06:05:21,558 INFO L78 Accepts]: Start accepts. Automaton has 50423 states and 75832 transitions. Word has length 128 [2021-11-20 06:05:21,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:21,560 INFO L470 AbstractCegarLoop]: Abstraction has 50423 states and 75832 transitions. [2021-11-20 06:05:21,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.0) internal successors, (87), 3 states have internal predecessors, (87), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-20 06:05:21,560 INFO L276 IsEmpty]: Start isEmpty. Operand 50423 states and 75832 transitions. [2021-11-20 06:05:21,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-20 06:05:21,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:21,703 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:21,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:21,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 06:05:21,930 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:21,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:21,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1108291405, now seen corresponding path program 1 times [2021-11-20 06:05:21,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:21,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320311621] [2021-11-20 06:05:21,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:21,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:21,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:05:21,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:05:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:21,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:05:21,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:22,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:05:22,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:22,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:22,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:22,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2021-11-20 06:05:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:22,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-20 06:05:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:22,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2021-11-20 06:05:22,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:22,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-20 06:05:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:22,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2021-11-20 06:05:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 06:05:22,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:22,076 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320311621] [2021-11-20 06:05:22,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320311621] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:22,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853023794] [2021-11-20 06:05:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:22,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:22,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:22,078 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:22,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:05:22,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:22,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:05:22,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:22,751 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 65 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-20 06:05:22,751 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:22,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853023794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:22,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:22,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2021-11-20 06:05:22,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586461310] [2021-11-20 06:05:22,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:22,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:05:22,755 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:22,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:05:22,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:05:22,756 INFO L87 Difference]: Start difference. First operand 50423 states and 75832 transitions. Second operand has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:05:26,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:26,473 INFO L93 Difference]: Finished difference Result 144551 states and 217323 transitions. [2021-11-20 06:05:26,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:05:26,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 166 [2021-11-20 06:05:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:26,875 INFO L225 Difference]: With dead ends: 144551 [2021-11-20 06:05:26,876 INFO L226 Difference]: Without dead ends: 96267 [2021-11-20 06:05:27,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:05:27,013 INFO L933 BasicCegarLoop]: 4200 mSDtfsCounter, 4085 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4085 SdHoareTripleChecker+Valid, 4397 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:27,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4085 Valid, 4397 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:05:27,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96267 states. [2021-11-20 06:05:32,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96267 to 95465. [2021-11-20 06:05:32,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95465 states, 82660 states have (on average 1.4675175417372368) internal successors, (121305), 83567 states have internal predecessors, (121305), 7381 states have call successors, (7381), 4654 states have call predecessors, (7381), 5422 states have return successors, (13774), 7307 states have call predecessors, (13774), 7381 states have call successors, (13774) [2021-11-20 06:05:32,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95465 states to 95465 states and 142460 transitions. [2021-11-20 06:05:32,832 INFO L78 Accepts]: Start accepts. Automaton has 95465 states and 142460 transitions. Word has length 166 [2021-11-20 06:05:32,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:32,832 INFO L470 AbstractCegarLoop]: Abstraction has 95465 states and 142460 transitions. [2021-11-20 06:05:32,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.333333333333336) internal successors, (121), 2 states have internal predecessors, (121), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-20 06:05:32,833 INFO L276 IsEmpty]: Start isEmpty. Operand 95465 states and 142460 transitions. [2021-11-20 06:05:33,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-20 06:05:33,214 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:33,215 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:33,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:33,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 06:05:33,430 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:33,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:33,431 INFO L85 PathProgramCache]: Analyzing trace with hash 399987983, now seen corresponding path program 1 times [2021-11-20 06:05:33,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:33,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580590903] [2021-11-20 06:05:33,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:33,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:05:33,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:05:33,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:05:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:05:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 06:05:33,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:05:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-20 06:05:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-20 06:05:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-20 06:05:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-20 06:05:33,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,643 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-20 06:05:33,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:33,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580590903] [2021-11-20 06:05:33,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580590903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:33,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316323414] [2021-11-20 06:05:33,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:33,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:33,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:33,646 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:33,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:05:33,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:33,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-20 06:05:33,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 103 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-20 06:05:34,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:34,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316323414] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:34,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:34,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-20 06:05:34,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580703095] [2021-11-20 06:05:34,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:34,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:05:34,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:34,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:05:34,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:05:34,284 INFO L87 Difference]: Start difference. First operand 95465 states and 142460 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:05:38,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:38,933 INFO L93 Difference]: Finished difference Result 146177 states and 218203 transitions. [2021-11-20 06:05:38,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:05:38,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 184 [2021-11-20 06:05:38,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:05:39,275 INFO L225 Difference]: With dead ends: 146177 [2021-11-20 06:05:39,275 INFO L226 Difference]: Without dead ends: 81821 [2021-11-20 06:05:39,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:05:39,450 INFO L933 BasicCegarLoop]: 4177 mSDtfsCounter, 4107 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4107 SdHoareTripleChecker+Valid, 4221 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:05:39,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4107 Valid, 4221 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:05:39,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81821 states. [2021-11-20 06:05:44,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81821 to 59061. [2021-11-20 06:05:44,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59061 states, 51472 states have (on average 1.4258043207957725) internal successors, (73389), 51935 states have internal predecessors, (73389), 4297 states have call successors, (4297), 2906 states have call predecessors, (4297), 3290 states have return successors, (6802), 4251 states have call predecessors, (6802), 4297 states have call successors, (6802) [2021-11-20 06:05:44,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59061 states to 59061 states and 84488 transitions. [2021-11-20 06:05:44,277 INFO L78 Accepts]: Start accepts. Automaton has 59061 states and 84488 transitions. Word has length 184 [2021-11-20 06:05:44,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:05:44,278 INFO L470 AbstractCegarLoop]: Abstraction has 59061 states and 84488 transitions. [2021-11-20 06:05:44,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 3 states have internal predecessors, (152), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-20 06:05:44,278 INFO L276 IsEmpty]: Start isEmpty. Operand 59061 states and 84488 transitions. [2021-11-20 06:05:44,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-20 06:05:44,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:05:44,413 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:05:44,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:05:44,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:44,638 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:05:44,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:05:44,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1248051052, now seen corresponding path program 1 times [2021-11-20 06:05:44,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:05:44,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340196866] [2021-11-20 06:05:44,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:44,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:05:44,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-11-20 06:05:44,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-11-20 06:05:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-11-20 06:05:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2021-11-20 06:05:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2021-11-20 06:05:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2021-11-20 06:05:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2021-11-20 06:05:44,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-20 06:05:44,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2021-11-20 06:05:44,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-20 06:05:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2021-11-20 06:05:44,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-11-20 06:05:44,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:05:44,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340196866] [2021-11-20 06:05:44,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340196866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 06:05:44,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356438046] [2021-11-20 06:05:44,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:05:44,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:05:44,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:05:44,847 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:05:44,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3222e34d-9e42-4d70-a036-25fbd98e40ec/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:05:44,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:05:44,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-20 06:05:45,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:05:45,489 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 72 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2021-11-20 06:05:45,489 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:05:45,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356438046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:05:45,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 06:05:45,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2021-11-20 06:05:45,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386658044] [2021-11-20 06:05:45,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:05:45,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-20 06:05:45,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:05:45,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-20 06:05:45,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-20 06:05:45,493 INFO L87 Difference]: Start difference. First operand 59061 states and 84488 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-20 06:05:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:05:49,297 INFO L93 Difference]: Finished difference Result 102084 states and 144765 transitions. [2021-11-20 06:05:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-20 06:05:49,298 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 184 [2021-11-20 06:05:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted.