./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8 --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 5d56dff15b0de2a89db18b71695d59ff3710bc2ebb344dc571e9d71343d9d530 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-e04fb08 [2022-11-16 11:11:54,347 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 11:11:54,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 11:11:54,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 11:11:54,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 11:11:54,379 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 11:11:54,382 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 11:11:54,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 11:11:54,389 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 11:11:54,395 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 11:11:54,396 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 11:11:54,397 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 11:11:54,399 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 11:11:54,401 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 11:11:54,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 11:11:54,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 11:11:54,407 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 11:11:54,414 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 11:11:54,415 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 11:11:54,417 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 11:11:54,421 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 11:11:54,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 11:11:54,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 11:11:54,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 11:11:54,429 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 11:11:54,435 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 11:11:54,436 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 11:11:54,437 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 11:11:54,438 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 11:11:54,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 11:11:54,441 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 11:11:54,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 11:11:54,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 11:11:54,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 11:11:54,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 11:11:54,447 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 11:11:54,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 11:11:54,448 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 11:11:54,448 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 11:11:54,449 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 11:11:54,450 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 11:11:54,451 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 11:11:54,490 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 11:11:54,498 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 11:11:54,499 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 11:11:54,499 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 11:11:54,500 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 11:11:54,501 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 11:11:54,501 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 11:11:54,502 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 11:11:54,502 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 11:11:54,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 11:11:54,503 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 11:11:54,504 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 11:11:54,504 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 11:11:54,504 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 11:11:54,504 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 11:11:54,504 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 11:11:54,505 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 11:11:54,505 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 11:11:54,505 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 11:11:54,505 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 11:11:54,506 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 11:11:54,506 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 11:11:54,506 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 11:11:54,506 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 11:11:54,507 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:11:54,507 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 11:11:54,508 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 11:11:54,509 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 11:11:54,509 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 11:11:54,509 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 11:11:54,509 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 11:11:54,510 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 11:11:54,510 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 11:11:54,510 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_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d56dff15b0de2a89db18b71695d59ff3710bc2ebb344dc571e9d71343d9d530 [2022-11-16 11:11:54,892 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 11:11:54,921 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 11:11:54,925 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 11:11:54,926 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 11:11:54,927 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 11:11:54,929 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c [2022-11-16 11:11:55,012 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/data/ef40b3676/9ab77d9c783a4f3cb6fc91dd761ca3fd/FLAG42b866995 [2022-11-16 11:11:56,232 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 11:11:56,233 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c [2022-11-16 11:11:56,285 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/data/ef40b3676/9ab77d9c783a4f3cb6fc91dd761ca3fd/FLAG42b866995 [2022-11-16 11:11:56,462 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/data/ef40b3676/9ab77d9c783a4f3cb6fc91dd761ca3fd [2022-11-16 11:11:56,465 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 11:11:56,467 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 11:11:56,471 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 11:11:56,471 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 11:11:56,475 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 11:11:56,476 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:56,477 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b828b58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:11:56, skipping insertion in model container [2022-11-16 11:11:56,477 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 11:11:56" (1/1) ... [2022-11-16 11:11:56,486 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 11:11:56,738 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 11:11:59,157 WARN L229 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_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c[380323,380336] [2022-11-16 11:11:59,189 WARN L229 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_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c[383339,383352] [2022-11-16 11:11:59,401 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:11:59,415 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 11:12:00,765 WARN L229 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_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c[380323,380336] [2022-11-16 11:12:00,772 WARN L229 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_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/sv-benchmarks/c/combinations/Problem05_label45+token_ring.02.cil-2.c[383339,383352] [2022-11-16 11:12:00,798 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 11:12:00,879 INFO L208 MainTranslator]: Completed translation [2022-11-16 11:12:00,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:00 WrapperNode [2022-11-16 11:12:00,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 11:12:00,881 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 11:12:00,881 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 11:12:00,882 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 11:12:00,890 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:00" (1/1) ... [2022-11-16 11:12:01,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:00" (1/1) ... [2022-11-16 11:12:01,601 INFO L138 Inliner]: procedures = 48, calls = 48, calls flagged for inlining = 25, calls inlined = 25, statements flattened = 12624 [2022-11-16 11:12:01,602 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 11:12:01,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 11:12:01,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 11:12:01,604 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 11:12:01,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:00" (1/1) ... [2022-11-16 11:12:01,617 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:00" (1/1) ... [2022-11-16 11:12:01,800 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:00" (1/1) ... [2022-11-16 11:12:01,801 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:00" (1/1) ... [2022-11-16 11:12:02,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:00" (1/1) ... [2022-11-16 11:12:02,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:00" (1/1) ... [2022-11-16 11:12:02,219 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:00" (1/1) ... [2022-11-16 11:12:02,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:00" (1/1) ... [2022-11-16 11:12:02,353 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 11:12:02,354 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 11:12:02,354 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 11:12:02,354 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 11:12:02,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:00" (1/1) ... [2022-11-16 11:12:02,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 11:12:02,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:02,441 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 11:12:02,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 11:12:02,574 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 11:12:02,574 INFO L130 BoogieDeclarations]: Found specification of procedure error [2022-11-16 11:12:02,574 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2022-11-16 11:12:02,574 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2022-11-16 11:12:02,575 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2022-11-16 11:12:02,575 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2022-11-16 11:12:02,575 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2022-11-16 11:12:02,575 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2022-11-16 11:12:02,591 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2022-11-16 11:12:02,591 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2022-11-16 11:12:02,591 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2022-11-16 11:12:02,591 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2022-11-16 11:12:02,592 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2022-11-16 11:12:02,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 11:12:02,592 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2022-11-16 11:12:02,592 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2022-11-16 11:12:02,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 11:12:02,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 11:12:02,730 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 11:12:02,743 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 11:12:12,095 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 11:12:12,116 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 11:12:12,117 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-16 11:12:12,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:12:12 BoogieIcfgContainer [2022-11-16 11:12:12,122 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 11:12:12,125 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 11:12:12,125 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 11:12:12,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 11:12:12,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 11:11:56" (1/3) ... [2022-11-16 11:12:12,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6d5362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:12:12, skipping insertion in model container [2022-11-16 11:12:12,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 11:12:00" (2/3) ... [2022-11-16 11:12:12,133 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f6d5362 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 11:12:12, skipping insertion in model container [2022-11-16 11:12:12,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 11:12:12" (3/3) ... [2022-11-16 11:12:12,135 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label45+token_ring.02.cil-2.c [2022-11-16 11:12:12,153 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 11:12:12,154 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-16 11:12:12,266 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 11:12:12,273 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@6b0ae1ce, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 11:12:12,274 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-16 11:12:12,295 INFO L276 IsEmpty]: Start isEmpty. Operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2022-11-16 11:12:12,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:12:12,308 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:12,309 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:12:12,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:12,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:12,316 INFO L85 PathProgramCache]: Analyzing trace with hash -2062992276, now seen corresponding path program 1 times [2022-11-16 11:12:12,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:12,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800308235] [2022-11-16 11:12:12,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:12,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:12,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:12,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:12,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:12,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:12,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:12,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:12,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:12,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:12,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800308235] [2022-11-16 11:12:12,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800308235] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:12,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:12,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:12:12,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507864668] [2022-11-16 11:12:12,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:12,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:12:12,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:12,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:12:12,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:12:12,930 INFO L87 Difference]: Start difference. First operand has 2323 states, 2295 states have (on average 1.857516339869281) internal successors, (4263), 2300 states have internal predecessors, (4263), 18 states have call successors, (18), 7 states have call predecessors, (18), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:12:14,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:14,378 INFO L93 Difference]: Finished difference Result 4824 states and 8887 transitions. [2022-11-16 11:12:14,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:12:14,381 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-16 11:12:14,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:14,408 INFO L225 Difference]: With dead ends: 4824 [2022-11-16 11:12:14,408 INFO L226 Difference]: Without dead ends: 2441 [2022-11-16 11:12:14,416 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2022-11-16 11:12:14,419 INFO L413 NwaCegarLoop]: 4168 mSDtfsCounter, 4452 mSDsluCounter, 12443 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4461 SdHoareTripleChecker+Valid, 16611 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:14,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4461 Valid, 16611 Invalid, 717 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [76 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:12:14,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2441 states. [2022-11-16 11:12:14,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2441 to 2376. [2022-11-16 11:12:14,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2332 states have (on average 1.8340480274442539) internal successors, (4277), 2336 states have internal predecessors, (4277), 29 states have call successors, (29), 13 states have call predecessors, (29), 13 states have return successors, (30), 27 states have call predecessors, (30), 27 states have call successors, (30) [2022-11-16 11:12:14,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 4336 transitions. [2022-11-16 11:12:14,564 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 4336 transitions. Word has length 69 [2022-11-16 11:12:14,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:14,565 INFO L495 AbstractCegarLoop]: Abstraction has 2376 states and 4336 transitions. [2022-11-16 11:12:14,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:12:14,565 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 4336 transitions. [2022-11-16 11:12:14,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:12:14,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:14,575 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:12:14,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 11:12:14,576 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:14,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:14,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1960277912, now seen corresponding path program 1 times [2022-11-16 11:12:14,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:14,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824466672] [2022-11-16 11:12:14,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:14,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:14,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:14,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:14,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:14,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:14,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:14,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:14,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:14,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:14,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:14,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:14,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:14,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824466672] [2022-11-16 11:12:14,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824466672] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:14,854 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:14,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:12:14,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702634805] [2022-11-16 11:12:14,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:14,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:12:14,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:14,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:12:14,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:12:14,858 INFO L87 Difference]: Start difference. First operand 2376 states and 4336 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:12:16,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:16,165 INFO L93 Difference]: Finished difference Result 2838 states and 5030 transitions. [2022-11-16 11:12:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:12:16,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-16 11:12:16,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:16,182 INFO L225 Difference]: With dead ends: 2838 [2022-11-16 11:12:16,182 INFO L226 Difference]: Without dead ends: 2593 [2022-11-16 11:12:16,187 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:12:16,188 INFO L413 NwaCegarLoop]: 4172 mSDtfsCounter, 4378 mSDsluCounter, 16510 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4387 SdHoareTripleChecker+Valid, 20682 SdHoareTripleChecker+Invalid, 1016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:16,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4387 Valid, 20682 Invalid, 1016 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [47 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:12:16,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2593 states. [2022-11-16 11:12:16,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2593 to 2490. [2022-11-16 11:12:16,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2490 states, 2428 states have (on average 1.82001647446458) internal successors, (4419), 2433 states have internal predecessors, (4419), 40 states have call successors, (40), 19 states have call predecessors, (40), 20 states have return successors, (43), 39 states have call predecessors, (43), 38 states have call successors, (43) [2022-11-16 11:12:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2490 states to 2490 states and 4502 transitions. [2022-11-16 11:12:16,305 INFO L78 Accepts]: Start accepts. Automaton has 2490 states and 4502 transitions. Word has length 69 [2022-11-16 11:12:16,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:16,307 INFO L495 AbstractCegarLoop]: Abstraction has 2490 states and 4502 transitions. [2022-11-16 11:12:16,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:12:16,308 INFO L276 IsEmpty]: Start isEmpty. Operand 2490 states and 4502 transitions. [2022-11-16 11:12:16,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:12:16,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:16,312 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:12:16,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 11:12:16,313 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:16,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:16,314 INFO L85 PathProgramCache]: Analyzing trace with hash -573492502, now seen corresponding path program 1 times [2022-11-16 11:12:16,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:16,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813057579] [2022-11-16 11:12:16,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:16,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:16,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:16,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:16,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:16,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:16,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:16,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:16,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:16,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:16,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:16,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813057579] [2022-11-16 11:12:16,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813057579] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:16,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:16,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:12:16,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343665497] [2022-11-16 11:12:16,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:16,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:12:16,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:16,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:12:16,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:12:16,479 INFO L87 Difference]: Start difference. First operand 2490 states and 4502 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:12:17,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:17,723 INFO L93 Difference]: Finished difference Result 3239 states and 5624 transitions. [2022-11-16 11:12:17,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 11:12:17,724 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-16 11:12:17,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:17,737 INFO L225 Difference]: With dead ends: 3239 [2022-11-16 11:12:17,737 INFO L226 Difference]: Without dead ends: 2880 [2022-11-16 11:12:17,743 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:12:17,747 INFO L413 NwaCegarLoop]: 4103 mSDtfsCounter, 4418 mSDsluCounter, 16296 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4427 SdHoareTripleChecker+Valid, 20399 SdHoareTripleChecker+Invalid, 919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:17,748 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4427 Valid, 20399 Invalid, 919 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [67 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:12:17,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2880 states. [2022-11-16 11:12:17,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2880 to 2719. [2022-11-16 11:12:17,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2719 states, 2621 states have (on average 1.794734834032812) internal successors, (4704), 2628 states have internal predecessors, (4704), 62 states have call successors, (62), 31 states have call predecessors, (62), 34 states have return successors, (73), 63 states have call predecessors, (73), 60 states have call successors, (73) [2022-11-16 11:12:17,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2719 states to 2719 states and 4839 transitions. [2022-11-16 11:12:17,855 INFO L78 Accepts]: Start accepts. Automaton has 2719 states and 4839 transitions. Word has length 69 [2022-11-16 11:12:17,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:17,855 INFO L495 AbstractCegarLoop]: Abstraction has 2719 states and 4839 transitions. [2022-11-16 11:12:17,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:12:17,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2719 states and 4839 transitions. [2022-11-16 11:12:17,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:12:17,857 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:17,857 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:12:17,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 11:12:17,858 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:17,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:17,858 INFO L85 PathProgramCache]: Analyzing trace with hash 302526504, now seen corresponding path program 1 times [2022-11-16 11:12:17,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:17,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008518562] [2022-11-16 11:12:17,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:17,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:17,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:17,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:17,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:17,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:17,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:17,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:17,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:17,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:17,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:17,989 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008518562] [2022-11-16 11:12:17,989 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008518562] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:17,989 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:17,989 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:12:17,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448243419] [2022-11-16 11:12:17,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:17,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:12:17,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:17,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:12:17,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:12:17,992 INFO L87 Difference]: Start difference. First operand 2719 states and 4839 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:12:19,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:19,467 INFO L93 Difference]: Finished difference Result 4113 states and 6915 transitions. [2022-11-16 11:12:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:12:19,468 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-16 11:12:19,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:19,484 INFO L225 Difference]: With dead ends: 4113 [2022-11-16 11:12:19,485 INFO L226 Difference]: Without dead ends: 3525 [2022-11-16 11:12:19,488 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:12:19,489 INFO L413 NwaCegarLoop]: 4167 mSDtfsCounter, 4388 mSDsluCounter, 16499 mSDsCounter, 0 mSdLazyCounter, 1058 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4396 SdHoareTripleChecker+Valid, 20666 SdHoareTripleChecker+Invalid, 1109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:19,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4396 Valid, 20666 Invalid, 1109 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [51 Valid, 1058 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-11-16 11:12:19,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3525 states. [2022-11-16 11:12:19,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3525 to 3131. [2022-11-16 11:12:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3131 states, 2965 states have (on average 1.7551433389544688) internal successors, (5204), 2976 states have internal predecessors, (5204), 102 states have call successors, (102), 55 states have call predecessors, (102), 62 states have return successors, (135), 107 states have call predecessors, (135), 100 states have call successors, (135) [2022-11-16 11:12:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3131 states to 3131 states and 5441 transitions. [2022-11-16 11:12:19,669 INFO L78 Accepts]: Start accepts. Automaton has 3131 states and 5441 transitions. Word has length 69 [2022-11-16 11:12:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:19,670 INFO L495 AbstractCegarLoop]: Abstraction has 3131 states and 5441 transitions. [2022-11-16 11:12:19,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:12:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3131 states and 5441 transitions. [2022-11-16 11:12:19,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:12:19,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:19,673 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:12:19,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 11:12:19,673 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:19,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:19,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1840866534, now seen corresponding path program 1 times [2022-11-16 11:12:19,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:19,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823717442] [2022-11-16 11:12:19,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:19,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:19,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:19,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:19,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:19,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:19,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:19,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:19,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:19,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:19,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:19,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:19,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:19,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823717442] [2022-11-16 11:12:19,836 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823717442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:19,837 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:19,837 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-16 11:12:19,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281293384] [2022-11-16 11:12:19,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:19,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-16 11:12:19,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:19,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-16 11:12:19,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-16 11:12:19,840 INFO L87 Difference]: Start difference. First operand 3131 states and 5441 transitions. Second operand has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:12:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:21,226 INFO L93 Difference]: Finished difference Result 5511 states and 8955 transitions. [2022-11-16 11:12:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-16 11:12:21,227 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-16 11:12:21,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:21,250 INFO L225 Difference]: With dead ends: 5511 [2022-11-16 11:12:21,250 INFO L226 Difference]: Without dead ends: 4511 [2022-11-16 11:12:21,256 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:12:21,257 INFO L413 NwaCegarLoop]: 4168 mSDtfsCounter, 4390 mSDsluCounter, 16502 mSDsCounter, 0 mSdLazyCounter, 917 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4402 SdHoareTripleChecker+Valid, 20670 SdHoareTripleChecker+Invalid, 972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 917 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:21,257 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4402 Valid, 20670 Invalid, 972 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [55 Valid, 917 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:12:21,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2022-11-16 11:12:21,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3988. [2022-11-16 11:12:21,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3988 states, 3690 states have (on average 1.7002710027100272) internal successors, (6274), 3709 states have internal predecessors, (6274), 178 states have call successors, (178), 103 states have call predecessors, (178), 118 states have return successors, (273), 191 states have call predecessors, (273), 176 states have call successors, (273) [2022-11-16 11:12:21,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3988 states to 3988 states and 6725 transitions. [2022-11-16 11:12:21,523 INFO L78 Accepts]: Start accepts. Automaton has 3988 states and 6725 transitions. Word has length 69 [2022-11-16 11:12:21,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:21,523 INFO L495 AbstractCegarLoop]: Abstraction has 3988 states and 6725 transitions. [2022-11-16 11:12:21,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.285714285714286) internal successors, (58), 5 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:12:21,524 INFO L276 IsEmpty]: Start isEmpty. Operand 3988 states and 6725 transitions. [2022-11-16 11:12:21,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-16 11:12:21,527 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:21,527 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:12:21,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 11:12:21,527 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:21,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:21,528 INFO L85 PathProgramCache]: Analyzing trace with hash -187719576, now seen corresponding path program 1 times [2022-11-16 11:12:21,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:21,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154944727] [2022-11-16 11:12:21,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:21,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:21,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:21,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:21,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:21,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:21,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:21,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:21,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:21,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 11:12:21,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:21,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154944727] [2022-11-16 11:12:21,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154944727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:21,655 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 11:12:21,656 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-16 11:12:21,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908720696] [2022-11-16 11:12:21,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:21,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-16 11:12:21,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:21,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-16 11:12:21,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-16 11:12:21,660 INFO L87 Difference]: Start difference. First operand 3988 states and 6725 transitions. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:12:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:22,972 INFO L93 Difference]: Finished difference Result 7372 states and 11760 transitions. [2022-11-16 11:12:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-16 11:12:22,973 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 69 [2022-11-16 11:12:22,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:22,999 INFO L225 Difference]: With dead ends: 7372 [2022-11-16 11:12:22,999 INFO L226 Difference]: Without dead ends: 5516 [2022-11-16 11:12:23,008 INFO L412 NwaCegarLoop]: 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 [2022-11-16 11:12:23,009 INFO L413 NwaCegarLoop]: 4183 mSDtfsCounter, 4517 mSDsluCounter, 12269 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4542 SdHoareTripleChecker+Valid, 16452 SdHoareTripleChecker+Invalid, 854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:23,010 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4542 Valid, 16452 Invalid, 854 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [71 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-11-16 11:12:23,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2022-11-16 11:12:23,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 4929. [2022-11-16 11:12:23,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4929 states, 4473 states have (on average 1.6492287055667338) internal successors, (7377), 4509 states have internal predecessors, (7377), 274 states have call successors, (274), 157 states have call predecessors, (274), 180 states have return successors, (397), 278 states have call predecessors, (397), 272 states have call successors, (397) [2022-11-16 11:12:23,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4929 states to 4929 states and 8048 transitions. [2022-11-16 11:12:23,311 INFO L78 Accepts]: Start accepts. Automaton has 4929 states and 8048 transitions. Word has length 69 [2022-11-16 11:12:23,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:23,312 INFO L495 AbstractCegarLoop]: Abstraction has 4929 states and 8048 transitions. [2022-11-16 11:12:23,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 4 states have internal predecessors, (58), 2 states have call successors, (6), 4 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-16 11:12:23,312 INFO L276 IsEmpty]: Start isEmpty. Operand 4929 states and 8048 transitions. [2022-11-16 11:12:23,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 11:12:23,319 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:23,320 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:23,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 11:12:23,320 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:23,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash 770021099, now seen corresponding path program 1 times [2022-11-16 11:12:23,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:23,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921288450] [2022-11-16 11:12:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:23,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:23,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:23,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:23,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:23,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:23,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:23,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:23,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:23,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:23,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:23,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:23,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 11:12:23,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:23,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:23,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 11:12:23,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:23,464 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:12:23,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:23,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921288450] [2022-11-16 11:12:23,465 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921288450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:23,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609314153] [2022-11-16 11:12:23,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:23,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:23,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:23,471 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:23,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 11:12:23,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:23,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:12:23,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-16 11:12:23,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:12:23,696 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609314153] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:23,696 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:12:23,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-16 11:12:23,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091048398] [2022-11-16 11:12:23,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:23,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:23,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:23,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:23,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:23,699 INFO L87 Difference]: Start difference. First operand 4929 states and 8048 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 11:12:24,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:24,160 INFO L93 Difference]: Finished difference Result 10380 states and 16066 transitions. [2022-11-16 11:12:24,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:24,161 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 111 [2022-11-16 11:12:24,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:24,212 INFO L225 Difference]: With dead ends: 10380 [2022-11-16 11:12:24,212 INFO L226 Difference]: Without dead ends: 7583 [2022-11-16 11:12:24,222 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:24,222 INFO L413 NwaCegarLoop]: 4162 mSDtfsCounter, 4110 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4110 SdHoareTripleChecker+Valid, 4333 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 [2022-11-16 11:12:24,223 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4110 Valid, 4333 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:12:24,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7583 states. [2022-11-16 11:12:24,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7583 to 7527. [2022-11-16 11:12:24,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7527 states, 6657 states have (on average 1.5841970857743728) internal successors, (10546), 6726 states have internal predecessors, (10546), 512 states have call successors, (512), 309 states have call predecessors, (512), 356 states have return successors, (745), 507 states have call predecessors, (745), 510 states have call successors, (745) [2022-11-16 11:12:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7527 states to 7527 states and 11803 transitions. [2022-11-16 11:12:24,678 INFO L78 Accepts]: Start accepts. Automaton has 7527 states and 11803 transitions. Word has length 111 [2022-11-16 11:12:24,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:24,681 INFO L495 AbstractCegarLoop]: Abstraction has 7527 states and 11803 transitions. [2022-11-16 11:12:24,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 2 states have internal predecessors, (80), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-16 11:12:24,682 INFO L276 IsEmpty]: Start isEmpty. Operand 7527 states and 11803 transitions. [2022-11-16 11:12:24,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-16 11:12:24,692 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:24,692 INFO L195 NwaCegarLoop]: 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 11:12:24,703 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:24,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-16 11:12:24,899 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:24,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:24,900 INFO L85 PathProgramCache]: Analyzing trace with hash -122535733, now seen corresponding path program 1 times [2022-11-16 11:12:24,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:24,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46486564] [2022-11-16 11:12:24,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:24,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:24,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:24,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:24,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:24,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:24,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:24,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:25,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:25,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:25,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:25,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 11:12:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:25,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:25,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-11-16 11:12:25,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-16 11:12:25,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:25,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46486564] [2022-11-16 11:12:25,063 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46486564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:25,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380039859] [2022-11-16 11:12:25,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:25,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:25,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:25,065 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:25,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 11:12:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:25,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:12:25,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:25,211 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 11:12:25,211 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:12:25,211 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380039859] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:25,211 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:12:25,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 11:12:25,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492283718] [2022-11-16 11:12:25,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:25,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:25,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:25,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:25,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:25,213 INFO L87 Difference]: Start difference. First operand 7527 states and 11803 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:12:25,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:25,895 INFO L93 Difference]: Finished difference Result 17935 states and 27159 transitions. [2022-11-16 11:12:25,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:25,895 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 111 [2022-11-16 11:12:25,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:25,955 INFO L225 Difference]: With dead ends: 17935 [2022-11-16 11:12:25,955 INFO L226 Difference]: Without dead ends: 12541 [2022-11-16 11:12:25,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:25,973 INFO L413 NwaCegarLoop]: 4311 mSDtfsCounter, 154 mSDsluCounter, 4150 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 8461 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 [2022-11-16 11:12:25,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 8461 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:12:25,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12541 states. [2022-11-16 11:12:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12541 to 12541. [2022-11-16 11:12:26,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12541 states, 10858 states have (on average 1.5209983422361393) internal successors, (16515), 10976 states have internal predecessors, (16515), 977 states have call successors, (977), 609 states have call predecessors, (977), 704 states have return successors, (1596), 987 states have call predecessors, (1596), 975 states have call successors, (1596) [2022-11-16 11:12:26,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 19088 transitions. [2022-11-16 11:12:26,854 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 19088 transitions. Word has length 111 [2022-11-16 11:12:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:26,854 INFO L495 AbstractCegarLoop]: Abstraction has 12541 states and 19088 transitions. [2022-11-16 11:12:26,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 3 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-16 11:12:26,855 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 19088 transitions. [2022-11-16 11:12:26,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-11-16 11:12:26,883 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:26,883 INFO L195 NwaCegarLoop]: trace histogram [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] [2022-11-16 11:12:26,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:27,088 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:27,088 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:27,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:27,089 INFO L85 PathProgramCache]: Analyzing trace with hash 327119452, now seen corresponding path program 1 times [2022-11-16 11:12:27,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:27,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792828589] [2022-11-16 11:12:27,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:27,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:27,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:27,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:27,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:27,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:27,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:27,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:27,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:27,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:27,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:27,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 11:12:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:27,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:27,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:27,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-11-16 11:12:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:27,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:27,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:27,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-11-16 11:12:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:27,278 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2022-11-16 11:12:27,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:27,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792828589] [2022-11-16 11:12:27,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792828589] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:27,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125324315] [2022-11-16 11:12:27,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:27,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:27,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:27,280 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:27,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 11:12:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:27,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:12:27,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:27,607 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 53 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 11:12:27,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:12:27,607 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125324315] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:27,608 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:12:27,608 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 8 [2022-11-16 11:12:27,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54812873] [2022-11-16 11:12:27,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:27,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:27,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:27,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:27,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:27,610 INFO L87 Difference]: Start difference. First operand 12541 states and 19088 transitions. Second operand has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 11:12:28,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:28,575 INFO L93 Difference]: Finished difference Result 32917 states and 49009 transitions. [2022-11-16 11:12:28,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:28,576 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 143 [2022-11-16 11:12:28,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:28,669 INFO L225 Difference]: With dead ends: 32917 [2022-11-16 11:12:28,670 INFO L226 Difference]: Without dead ends: 22513 [2022-11-16 11:12:28,706 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:28,709 INFO L413 NwaCegarLoop]: 4183 mSDtfsCounter, 4068 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4068 SdHoareTripleChecker+Valid, 4354 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 [2022-11-16 11:12:28,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4068 Valid, 4354 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:12:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22513 states. [2022-11-16 11:12:30,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22513 to 22301. [2022-11-16 11:12:30,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22301 states, 19038 states have (on average 1.4810904506775922) internal successors, (28197), 19270 states have internal predecessors, (28197), 1871 states have call successors, (1871), 1199 states have call predecessors, (1871), 1390 states have return successors, (3038), 1863 states have call predecessors, (3038), 1869 states have call successors, (3038) [2022-11-16 11:12:30,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22301 states to 22301 states and 33106 transitions. [2022-11-16 11:12:30,174 INFO L78 Accepts]: Start accepts. Automaton has 22301 states and 33106 transitions. Word has length 143 [2022-11-16 11:12:30,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:30,175 INFO L495 AbstractCegarLoop]: Abstraction has 22301 states and 33106 transitions. [2022-11-16 11:12:30,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.333333333333336) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2022-11-16 11:12:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand 22301 states and 33106 transitions. [2022-11-16 11:12:30,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-16 11:12:30,250 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:30,250 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-16 11:12:30,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:30,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:30,455 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:30,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:30,456 INFO L85 PathProgramCache]: Analyzing trace with hash 382011958, now seen corresponding path program 1 times [2022-11-16 11:12:30,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:30,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570273023] [2022-11-16 11:12:30,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:30,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:30,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:30,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:30,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:30,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:30,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:30,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:30,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:30,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:30,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:30,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:30,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-16 11:12:30,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:30,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-16 11:12:30,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:30,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:30,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:30,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-16 11:12:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:30,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:30,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-11-16 11:12:30,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 11:12:30,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:30,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570273023] [2022-11-16 11:12:30,703 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570273023] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:30,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130280825] [2022-11-16 11:12:30,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:30,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:30,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:30,705 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:30,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 11:12:30,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:30,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:12:30,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:30,972 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-16 11:12:30,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:12:30,973 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130280825] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:30,973 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:12:30,973 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 11:12:30,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133399707] [2022-11-16 11:12:30,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:30,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:30,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:30,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:30,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:30,976 INFO L87 Difference]: Start difference. First operand 22301 states and 33106 transitions. Second operand has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 11:12:32,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:32,716 INFO L93 Difference]: Finished difference Result 44821 states and 66508 transitions. [2022-11-16 11:12:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:32,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 160 [2022-11-16 11:12:32,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:32,825 INFO L225 Difference]: With dead ends: 44821 [2022-11-16 11:12:32,825 INFO L226 Difference]: Without dead ends: 24655 [2022-11-16 11:12:32,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:32,889 INFO L413 NwaCegarLoop]: 4149 mSDtfsCounter, 4087 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4087 SdHoareTripleChecker+Valid, 4183 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 [2022-11-16 11:12:32,890 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4087 Valid, 4183 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:12:32,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24655 states. [2022-11-16 11:12:34,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24655 to 24655. [2022-11-16 11:12:34,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24655 states, 21180 states have (on average 1.4241265344664777) internal successors, (30163), 21412 states have internal predecessors, (30163), 1925 states have call successors, (1925), 1357 states have call predecessors, (1925), 1548 states have return successors, (3106), 1917 states have call predecessors, (3106), 1923 states have call successors, (3106) [2022-11-16 11:12:34,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24655 states to 24655 states and 35194 transitions. [2022-11-16 11:12:34,676 INFO L78 Accepts]: Start accepts. Automaton has 24655 states and 35194 transitions. Word has length 160 [2022-11-16 11:12:34,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:34,677 INFO L495 AbstractCegarLoop]: Abstraction has 24655 states and 35194 transitions. [2022-11-16 11:12:34,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.333333333333336) internal successors, (127), 3 states have internal predecessors, (127), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 11:12:34,677 INFO L276 IsEmpty]: Start isEmpty. Operand 24655 states and 35194 transitions. [2022-11-16 11:12:34,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-11-16 11:12:34,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:34,752 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-16 11:12:34,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:34,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-16 11:12:34,967 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:34,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:34,968 INFO L85 PathProgramCache]: Analyzing trace with hash 228383827, now seen corresponding path program 1 times [2022-11-16 11:12:34,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:34,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494450383] [2022-11-16 11:12:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:34,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:34,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:35,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:35,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:35,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:35,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-11-16 11:12:35,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-11-16 11:12:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:35,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2022-11-16 11:12:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2022-11-16 11:12:35,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-16 11:12:35,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:35,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494450383] [2022-11-16 11:12:35,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494450383] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:35,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019977713] [2022-11-16 11:12:35,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:35,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:35,152 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:35,153 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:35,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 11:12:35,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:35,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-16 11:12:35,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:35,360 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 60 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-11-16 11:12:35,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:12:35,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019977713] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:35,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:12:35,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 11:12:35,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114750743] [2022-11-16 11:12:35,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:35,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:35,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:35,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:35,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:35,366 INFO L87 Difference]: Start difference. First operand 24655 states and 35194 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 11:12:37,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:37,305 INFO L93 Difference]: Finished difference Result 41688 states and 58732 transitions. [2022-11-16 11:12:37,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:37,306 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 160 [2022-11-16 11:12:37,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:37,396 INFO L225 Difference]: With dead ends: 41688 [2022-11-16 11:12:37,396 INFO L226 Difference]: Without dead ends: 26195 [2022-11-16 11:12:37,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:37,428 INFO L413 NwaCegarLoop]: 4171 mSDtfsCounter, 4088 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4088 SdHoareTripleChecker+Valid, 4349 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-16 11:12:37,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4088 Valid, 4349 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:12:37,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26195 states. [2022-11-16 11:12:39,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26195 to 26055. [2022-11-16 11:12:39,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26055 states, 22468 states have (on average 1.3989229125867901) internal successors, (31431), 22700 states have internal predecessors, (31431), 1945 states have call successors, (1945), 1449 states have call predecessors, (1945), 1640 states have return successors, (3218), 1937 states have call predecessors, (3218), 1943 states have call successors, (3218) [2022-11-16 11:12:39,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26055 states to 26055 states and 36594 transitions. [2022-11-16 11:12:39,433 INFO L78 Accepts]: Start accepts. Automaton has 26055 states and 36594 transitions. Word has length 160 [2022-11-16 11:12:39,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:39,434 INFO L495 AbstractCegarLoop]: Abstraction has 26055 states and 36594 transitions. [2022-11-16 11:12:39,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-16 11:12:39,435 INFO L276 IsEmpty]: Start isEmpty. Operand 26055 states and 36594 transitions. [2022-11-16 11:12:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-16 11:12:39,508 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:39,508 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-16 11:12:39,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:39,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:39,714 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:39,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:39,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1570525413, now seen corresponding path program 1 times [2022-11-16 11:12:39,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:39,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065215608] [2022-11-16 11:12:39,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:39,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:39,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:39,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:39,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:39,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:39,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:39,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:39,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:39,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:39,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:39,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:39,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 11:12:39,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:39,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:39,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-16 11:12:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:39,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-11-16 11:12:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:39,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:39,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:39,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-16 11:12:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2022-11-16 11:12:39,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:39,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065215608] [2022-11-16 11:12:39,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065215608] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:39,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782214927] [2022-11-16 11:12:39,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:39,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:39,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:39,961 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:39,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 11:12:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:40,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:12:40,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:40,165 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 76 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-16 11:12:40,165 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:12:40,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [782214927] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:40,165 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:12:40,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 11:12:40,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603031583] [2022-11-16 11:12:40,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:40,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:40,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:40,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:40,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:40,170 INFO L87 Difference]: Start difference. First operand 26055 states and 36594 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 11:12:43,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:43,830 INFO L93 Difference]: Finished difference Result 72665 states and 101108 transitions. [2022-11-16 11:12:43,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:43,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 161 [2022-11-16 11:12:43,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:44,220 INFO L225 Difference]: With dead ends: 72665 [2022-11-16 11:12:44,220 INFO L226 Difference]: Without dead ends: 48749 [2022-11-16 11:12:44,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:44,274 INFO L413 NwaCegarLoop]: 4320 mSDtfsCounter, 163 mSDsluCounter, 4147 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 8467 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 [2022-11-16 11:12:44,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 8467 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:12:44,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48749 states. [2022-11-16 11:12:48,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48749 to 48705. [2022-11-16 11:12:48,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48705 states, 41704 states have (on average 1.3657442931133703) internal successors, (56957), 42166 states have internal predecessors, (56957), 3775 states have call successors, (3775), 2841 states have call predecessors, (3775), 3224 states have return successors, (7134), 3761 states have call predecessors, (7134), 3773 states have call successors, (7134) [2022-11-16 11:12:48,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48705 states to 48705 states and 67866 transitions. [2022-11-16 11:12:48,573 INFO L78 Accepts]: Start accepts. Automaton has 48705 states and 67866 transitions. Word has length 161 [2022-11-16 11:12:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:48,573 INFO L495 AbstractCegarLoop]: Abstraction has 48705 states and 67866 transitions. [2022-11-16 11:12:48,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 3 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2022-11-16 11:12:48,574 INFO L276 IsEmpty]: Start isEmpty. Operand 48705 states and 67866 transitions. [2022-11-16 11:12:48,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-16 11:12:48,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:48,674 INFO L195 NwaCegarLoop]: 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] [2022-11-16 11:12:48,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:48,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:48,886 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:48,886 INFO L85 PathProgramCache]: Analyzing trace with hash -948353227, now seen corresponding path program 1 times [2022-11-16 11:12:48,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:48,887 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329116956] [2022-11-16 11:12:48,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:48,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:48,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:48,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:48,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:48,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:48,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:49,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:49,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:49,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 11:12:49,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:49,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:49,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:49,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-16 11:12:49,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:49,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-16 11:12:49,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:49,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:49,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:49,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-16 11:12:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2022-11-16 11:12:49,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:49,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329116956] [2022-11-16 11:12:49,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329116956] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:49,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141915831] [2022-11-16 11:12:49,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:49,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:49,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:49,079 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:49,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 11:12:49,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:49,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:12:49,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-16 11:12:49,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:12:49,358 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141915831] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:49,358 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:12:49,358 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 11:12:49,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925297146] [2022-11-16 11:12:49,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:49,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:49,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:49,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:49,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:49,361 INFO L87 Difference]: Start difference. First operand 48705 states and 67866 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 11:12:52,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-16 11:12:52,456 INFO L93 Difference]: Finished difference Result 79069 states and 111521 transitions. [2022-11-16 11:12:52,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-16 11:12:52,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 161 [2022-11-16 11:12:52,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-16 11:12:52,618 INFO L225 Difference]: With dead ends: 79069 [2022-11-16 11:12:52,619 INFO L226 Difference]: Without dead ends: 41521 [2022-11-16 11:12:52,879 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:52,892 INFO L413 NwaCegarLoop]: 4148 mSDtfsCounter, 4082 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4082 SdHoareTripleChecker+Valid, 4181 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 [2022-11-16 11:12:52,892 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4082 Valid, 4181 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-16 11:12:52,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41521 states. [2022-11-16 11:12:55,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41521 to 30305. [2022-11-16 11:12:55,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30305 states, 26128 states have (on average 1.3429654011022658) internal successors, (35089), 26370 states have internal predecessors, (35089), 2255 states have call successors, (2255), 1729 states have call predecessors, (2255), 1920 states have return successors, (3778), 2237 states have call predecessors, (3778), 2253 states have call successors, (3778) [2022-11-16 11:12:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30305 states to 30305 states and 41122 transitions. [2022-11-16 11:12:55,763 INFO L78 Accepts]: Start accepts. Automaton has 30305 states and 41122 transitions. Word has length 161 [2022-11-16 11:12:55,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-16 11:12:55,763 INFO L495 AbstractCegarLoop]: Abstraction has 30305 states and 41122 transitions. [2022-11-16 11:12:55,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 3 states have internal predecessors, (118), 3 states have call successors, (10), 3 states have call predecessors, (10), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-16 11:12:55,764 INFO L276 IsEmpty]: Start isEmpty. Operand 30305 states and 41122 transitions. [2022-11-16 11:12:55,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-11-16 11:12:55,822 INFO L187 NwaCegarLoop]: Found error trace [2022-11-16 11:12:55,823 INFO L195 NwaCegarLoop]: 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, 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] [2022-11-16 11:12:55,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 11:12:56,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-16 11:12:56,032 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-16 11:12:56,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 11:12:56,032 INFO L85 PathProgramCache]: Analyzing trace with hash -192882952, now seen corresponding path program 1 times [2022-11-16 11:12:56,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 11:12:56,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208145748] [2022-11-16 11:12:56,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:56,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 11:12:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-16 11:12:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-16 11:12:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-16 11:12:56,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-11-16 11:12:56,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-11-16 11:12:56,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2022-11-16 11:12:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:56,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2022-11-16 11:12:56,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2022-11-16 11:12:56,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-11-16 11:12:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-11-16 11:12:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,264 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2022-11-16 11:12:56,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 11:12:56,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208145748] [2022-11-16 11:12:56,264 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208145748] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 11:12:56,264 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629521644] [2022-11-16 11:12:56,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 11:12:56,265 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 11:12:56,265 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 11:12:56,266 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 11:12:56,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_aea57518-26c1-4db6-bc6d-9c7c6f3b6be6/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 11:12:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 11:12:56,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 538 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-16 11:12:56,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 11:12:56,445 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-16 11:12:56,445 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-16 11:12:56,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629521644] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 11:12:56,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-16 11:12:56,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2022-11-16 11:12:56,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242133952] [2022-11-16 11:12:56,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 11:12:56,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-16 11:12:56,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 11:12:56,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-16 11:12:56,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-16 11:12:56,448 INFO L87 Difference]: Start difference. First operand 30305 states and 41122 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11)