./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.01.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.01.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI --witnessprinter.witness.filename witness --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 352e453d29e3ec1e2ba2c1191212dcec23d3b6a54e25ae049f0e79e2798ccd2e --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:55:29,123 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:55:29,257 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:55:29,268 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:55:29,269 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:55:29,324 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:55:29,326 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:55:29,327 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:55:29,329 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:55:29,334 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:55:29,335 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:55:29,336 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:55:29,337 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:55:29,339 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:55:29,340 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:55:29,340 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:55:29,341 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:55:29,341 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:55:29,342 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:55:29,343 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:55:29,343 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:55:29,344 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:55:29,344 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:55:29,345 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:55:29,345 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:55:29,346 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:55:29,346 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:55:29,347 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:55:29,348 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:55:29,348 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:55:29,350 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:55:29,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:55:29,351 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:55:29,351 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:55:29,351 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:55:29,351 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:55:29,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:55:29,352 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:55:29,352 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:55:29,353 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:55:29,353 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:55:29,354 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:55:29,354 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 352e453d29e3ec1e2ba2c1191212dcec23d3b6a54e25ae049f0e79e2798ccd2e [2023-11-24 21:55:29,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:55:29,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:55:29,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:55:29,756 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:55:29,756 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:55:29,758 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/combinations/Problem05_label46+token_ring.01.cil-1.c [2023-11-24 21:55:32,906 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:55:33,864 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:55:33,865 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/sv-benchmarks/c/combinations/Problem05_label46+token_ring.01.cil-1.c [2023-11-24 21:55:33,924 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/data/dea2de1a1/5b9230c91316499b85313c59300aa2e7/FLAG76282c582 [2023-11-24 21:55:33,943 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/data/dea2de1a1/5b9230c91316499b85313c59300aa2e7 [2023-11-24 21:55:33,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:55:33,954 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:55:33,957 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:33,958 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:55:33,963 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:55:33,964 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:33" (1/1) ... [2023-11-24 21:55:33,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ba67fd8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:33, skipping insertion in model container [2023-11-24 21:55:33,973 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:55:33" (1/1) ... [2023-11-24 21:55:34,273 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:55:37,334 WARN L240 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_c90ea947-6695-44e9-8746-3ec61a48420f/sv-benchmarks/c/combinations/Problem05_label46+token_ring.01.cil-1.c[382357,382370] [2023-11-24 21:55:37,363 WARN L240 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_c90ea947-6695-44e9-8746-3ec61a48420f/sv-benchmarks/c/combinations/Problem05_label46+token_ring.01.cil-1.c[383339,383352] [2023-11-24 21:55:37,552 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:37,565 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:55:38,966 WARN L240 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_c90ea947-6695-44e9-8746-3ec61a48420f/sv-benchmarks/c/combinations/Problem05_label46+token_ring.01.cil-1.c[382357,382370] [2023-11-24 21:55:38,970 WARN L240 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_c90ea947-6695-44e9-8746-3ec61a48420f/sv-benchmarks/c/combinations/Problem05_label46+token_ring.01.cil-1.c[383339,383352] [2023-11-24 21:55:38,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:55:39,060 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:55:39,060 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39 WrapperNode [2023-11-24 21:55:39,061 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:55:39,062 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:55:39,062 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:55:39,062 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:55:39,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39" (1/1) ... [2023-11-24 21:55:39,173 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39" (1/1) ... [2023-11-24 21:55:39,697 INFO L138 Inliner]: procedures = 46, calls = 44, calls flagged for inlining = 24, calls inlined = 24, statements flattened = 12568 [2023-11-24 21:55:39,698 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:55:39,698 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:55:39,698 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:55:39,699 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:55:39,710 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39" (1/1) ... [2023-11-24 21:55:39,711 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39" (1/1) ... [2023-11-24 21:55:39,764 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39" (1/1) ... [2023-11-24 21:55:39,874 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-24 21:55:39,874 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39" (1/1) ... [2023-11-24 21:55:39,874 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39" (1/1) ... [2023-11-24 21:55:40,155 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39" (1/1) ... [2023-11-24 21:55:40,312 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39" (1/1) ... [2023-11-24 21:55:40,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39" (1/1) ... [2023-11-24 21:55:40,392 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39" (1/1) ... [2023-11-24 21:55:40,533 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:55:40,534 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:55:40,534 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:55:40,534 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:55:40,535 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39" (1/1) ... [2023-11-24 21:55:40,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:55:40,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:55:40,609 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:55:40,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:55:40,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:55:40,691 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2023-11-24 21:55:40,691 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2023-11-24 21:55:40,691 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2023-11-24 21:55:40,693 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2023-11-24 21:55:40,694 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2023-11-24 21:55:40,694 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2023-11-24 21:55:40,695 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2023-11-24 21:55:40,695 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2023-11-24 21:55:40,695 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2023-11-24 21:55:40,695 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2023-11-24 21:55:40,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:55:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2023-11-24 21:55:40,696 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2023-11-24 21:55:40,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:55:40,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:55:40,800 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:55:40,802 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:55:50,679 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:55:50,790 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:55:50,791 INFO L309 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-24 21:55:50,792 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:55:50 BoogieIcfgContainer [2023-11-24 21:55:50,792 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:55:50,795 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:55:50,796 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:55:50,799 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:55:50,799 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:55:33" (1/3) ... [2023-11-24 21:55:50,800 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32dda859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:55:50, skipping insertion in model container [2023-11-24 21:55:50,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:55:39" (2/3) ... [2023-11-24 21:55:50,801 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32dda859 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:55:50, skipping insertion in model container [2023-11-24 21:55:50,801 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:55:50" (3/3) ... [2023-11-24 21:55:50,802 INFO L112 eAbstractionObserver]: Analyzing ICFG Problem05_label46+token_ring.01.cil-1.c [2023-11-24 21:55:50,823 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:55:50,823 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2023-11-24 21:55:51,022 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:55:51,030 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=LoopHeads, 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;@45b2eff7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:55:51,031 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2023-11-24 21:55:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand has 2218 states, 2194 states have (on average 1.8869644484958978) internal successors, (4140), 2197 states have internal predecessors, (4140), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-24 21:55:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 21:55:51,066 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:55:51,071 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] [2023-11-24 21:55:51,072 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:55:51,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:51,080 INFO L85 PathProgramCache]: Analyzing trace with hash 9186436, now seen corresponding path program 1 times [2023-11-24 21:55:51,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:51,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150692844] [2023-11-24 21:55:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:51,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:51,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:55:51,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:51,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:55:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:51,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:55:51,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:51,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:55:51,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:51,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:55:51,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:51,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:51,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:51,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150692844] [2023-11-24 21:55:51,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150692844] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:51,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:51,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:55:51,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155158641] [2023-11-24 21:55:51,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:51,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:55:51,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:51,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:55:51,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:55:51,709 INFO L87 Difference]: Start difference. First operand has 2218 states, 2194 states have (on average 1.8869644484958978) internal successors, (4140), 2197 states have internal predecessors, (4140), 15 states have call successors, (15), 6 states have call predecessors, (15), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:55:53,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:55:53,039 INFO L93 Difference]: Finished difference Result 4554 states and 8527 transitions. [2023-11-24 21:55:53,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:55:53,043 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2023-11-24 21:55:53,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:55:53,079 INFO L225 Difference]: With dead ends: 4554 [2023-11-24 21:55:53,079 INFO L226 Difference]: Without dead ends: 2337 [2023-11-24 21:55:53,091 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 [2023-11-24 21:55:53,096 INFO L413 NwaCegarLoop]: 4040 mSDtfsCounter, 4241 mSDsluCounter, 12089 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4249 SdHoareTripleChecker+Valid, 16129 SdHoareTripleChecker+Invalid, 518 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-24 21:55:53,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4249 Valid, 16129 Invalid, 518 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [64 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-24 21:55:53,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2337 states. [2023-11-24 21:55:53,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2337 to 2298. [2023-11-24 21:55:53,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2258 states have (on average 1.8432240921169176) internal successors, (4162), 2261 states have internal predecessors, (4162), 25 states have call successors, (25), 12 states have call predecessors, (25), 13 states have return successors, (28), 25 states have call predecessors, (28), 25 states have call successors, (28) [2023-11-24 21:55:53,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 4215 transitions. [2023-11-24 21:55:53,296 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 4215 transitions. Word has length 51 [2023-11-24 21:55:53,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:55:53,297 INFO L495 AbstractCegarLoop]: Abstraction has 2298 states and 4215 transitions. [2023-11-24 21:55:53,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:55:53,298 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 4215 transitions. [2023-11-24 21:55:53,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 21:55:53,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:55:53,302 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] [2023-11-24 21:55:53,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:55:53,303 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:55:53,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:53,304 INFO L85 PathProgramCache]: Analyzing trace with hash 855534984, now seen corresponding path program 1 times [2023-11-24 21:55:53,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:53,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600125129] [2023-11-24 21:55:53,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:53,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:53,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:53,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:55:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:53,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:55:53,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:53,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:55:53,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:53,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:55:53,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:53,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:55:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:53,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:53,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:53,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600125129] [2023-11-24 21:55:53,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600125129] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:53,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:53,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:55:53,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132342206] [2023-11-24 21:55:53,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:53,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:55:53,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:53,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:55:53,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:55:53,628 INFO L87 Difference]: Start difference. First operand 2298 states and 4215 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:55:54,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:55:54,932 INFO L93 Difference]: Finished difference Result 2608 states and 4667 transitions. [2023-11-24 21:55:54,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-24 21:55:54,933 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2023-11-24 21:55:54,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:55:54,961 INFO L225 Difference]: With dead ends: 2608 [2023-11-24 21:55:54,962 INFO L226 Difference]: Without dead ends: 2438 [2023-11-24 21:55:54,965 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 [2023-11-24 21:55:54,967 INFO L413 NwaCegarLoop]: 4091 mSDtfsCounter, 4227 mSDsluCounter, 16209 mSDsCounter, 0 mSdLazyCounter, 742 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4235 SdHoareTripleChecker+Valid, 20300 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:55:54,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4235 Valid, 20300 Invalid, 781 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [39 Valid, 742 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 21:55:54,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2023-11-24 21:55:55,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 2377. [2023-11-24 21:55:55,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2377 states, 2320 states have (on average 1.8323275862068966) internal successors, (4251), 2324 states have internal predecessors, (4251), 35 states have call successors, (35), 18 states have call predecessors, (35), 20 states have return successors, (40), 36 states have call predecessors, (40), 35 states have call successors, (40) [2023-11-24 21:55:55,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2377 states to 2377 states and 4326 transitions. [2023-11-24 21:55:55,106 INFO L78 Accepts]: Start accepts. Automaton has 2377 states and 4326 transitions. Word has length 51 [2023-11-24 21:55:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:55:55,107 INFO L495 AbstractCegarLoop]: Abstraction has 2377 states and 4326 transitions. [2023-11-24 21:55:55,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:55:55,109 INFO L276 IsEmpty]: Start isEmpty. Operand 2377 states and 4326 transitions. [2023-11-24 21:55:55,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 21:55:55,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:55:55,122 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] [2023-11-24 21:55:55,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:55:55,123 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:55:55,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:55,125 INFO L85 PathProgramCache]: Analyzing trace with hash -516272314, now seen corresponding path program 1 times [2023-11-24 21:55:55,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:55,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270511752] [2023-11-24 21:55:55,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:55,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:55,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:55,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:55:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:55,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:55:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:55,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:55:55,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:55,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:55:55,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:55,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:55:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:55,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:55,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:55,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270511752] [2023-11-24 21:55:55,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270511752] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:55,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:55,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:55:55,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934597050] [2023-11-24 21:55:55,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:55,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:55:55,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:55,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:55:55,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:55:55,411 INFO L87 Difference]: Start difference. First operand 2377 states and 4326 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:55:56,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:55:56,776 INFO L93 Difference]: Finished difference Result 2918 states and 5108 transitions. [2023-11-24 21:55:56,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:55:56,777 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2023-11-24 21:55:56,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:55:56,801 INFO L225 Difference]: With dead ends: 2918 [2023-11-24 21:55:56,801 INFO L226 Difference]: Without dead ends: 2669 [2023-11-24 21:55:56,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:55:56,806 INFO L413 NwaCegarLoop]: 4087 mSDtfsCounter, 4274 mSDsluCounter, 16204 mSDsCounter, 0 mSdLazyCounter, 728 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4284 SdHoareTripleChecker+Valid, 20291 SdHoareTripleChecker+Invalid, 772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:55:56,807 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4284 Valid, 20291 Invalid, 772 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [44 Valid, 728 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 21:55:56,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2669 states. [2023-11-24 21:55:56,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2669 to 2532. [2023-11-24 21:55:56,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 2443 states have (on average 1.8125255832992222) internal successors, (4428), 2449 states have internal predecessors, (4428), 53 states have call successors, (53), 30 states have call predecessors, (53), 34 states have return successors, (66), 56 states have call predecessors, (66), 53 states have call successors, (66) [2023-11-24 21:55:56,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 4547 transitions. [2023-11-24 21:55:56,955 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 4547 transitions. Word has length 51 [2023-11-24 21:55:56,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:55:56,955 INFO L495 AbstractCegarLoop]: Abstraction has 2532 states and 4547 transitions. [2023-11-24 21:55:56,956 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:55:56,956 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 4547 transitions. [2023-11-24 21:55:56,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 21:55:56,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:55:56,959 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] [2023-11-24 21:55:56,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:55:56,960 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:55:56,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:56,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1933327816, now seen corresponding path program 1 times [2023-11-24 21:55:56,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:56,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149485708] [2023-11-24 21:55:56,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:56,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:56,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:57,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:55:57,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:57,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:55:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:57,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:55:57,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:57,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:55:57,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:57,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:55:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:57,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:57,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149485708] [2023-11-24 21:55:57,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149485708] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:57,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:57,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-24 21:55:57,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959861474] [2023-11-24 21:55:57,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:57,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-24 21:55:57,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:57,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-24 21:55:57,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:55:57,139 INFO L87 Difference]: Start difference. First operand 2532 states and 4547 transitions. Second operand has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:55:58,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:55:58,446 INFO L93 Difference]: Finished difference Result 3404 states and 5803 transitions. [2023-11-24 21:55:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:55:58,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2023-11-24 21:55:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:55:58,475 INFO L225 Difference]: With dead ends: 3404 [2023-11-24 21:55:58,476 INFO L226 Difference]: Without dead ends: 3000 [2023-11-24 21:55:58,479 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2023-11-24 21:55:58,481 INFO L413 NwaCegarLoop]: 4076 mSDtfsCounter, 4221 mSDsluCounter, 16189 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4228 SdHoareTripleChecker+Valid, 20265 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-24 21:55:58,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4228 Valid, 20265 Invalid, 798 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [49 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-24 21:55:58,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2023-11-24 21:55:58,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2813. [2023-11-24 21:55:58,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2813 states, 2666 states have (on average 1.7801950487621905) internal successors, (4746), 2676 states have internal predecessors, (4746), 85 states have call successors, (85), 52 states have call predecessors, (85), 60 states have return successors, (120), 92 states have call predecessors, (120), 85 states have call successors, (120) [2023-11-24 21:55:58,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2813 states to 2813 states and 4951 transitions. [2023-11-24 21:55:58,668 INFO L78 Accepts]: Start accepts. Automaton has 2813 states and 4951 transitions. Word has length 51 [2023-11-24 21:55:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:55:58,669 INFO L495 AbstractCegarLoop]: Abstraction has 2813 states and 4951 transitions. [2023-11-24 21:55:58,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.857142857142857) internal successors, (41), 5 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:55:58,670 INFO L276 IsEmpty]: Start isEmpty. Operand 2813 states and 4951 transitions. [2023-11-24 21:55:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-24 21:55:58,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:55:58,673 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] [2023-11-24 21:55:58,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-24 21:55:58,674 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:55:58,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:58,674 INFO L85 PathProgramCache]: Analyzing trace with hash 903968518, now seen corresponding path program 1 times [2023-11-24 21:55:58,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:58,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043753442] [2023-11-24 21:55:58,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:58,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:58,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:55:58,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:58,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:55:58,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:58,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:55:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:58,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:55:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:58,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:55:58,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:58,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:55:58,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:55:58,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043753442] [2023-11-24 21:55:58,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043753442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:55:58,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:55:58,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:55:58,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646623483] [2023-11-24 21:55:58,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:55:58,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:55:58,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:55:58,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:55:58,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:55:58,800 INFO L87 Difference]: Start difference. First operand 2813 states and 4951 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:55:59,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:55:59,651 INFO L93 Difference]: Finished difference Result 4060 states and 6755 transitions. [2023-11-24 21:55:59,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-24 21:55:59,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 51 [2023-11-24 21:55:59,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:55:59,674 INFO L225 Difference]: With dead ends: 4060 [2023-11-24 21:55:59,674 INFO L226 Difference]: Without dead ends: 3376 [2023-11-24 21:55:59,678 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 [2023-11-24 21:55:59,679 INFO L413 NwaCegarLoop]: 4106 mSDtfsCounter, 4332 mSDsluCounter, 12095 mSDsCounter, 0 mSdLazyCounter, 579 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4355 SdHoareTripleChecker+Valid, 16201 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-24 21:55:59,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4355 Valid, 16201 Invalid, 642 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [63 Valid, 579 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-24 21:55:59,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3376 states. [2023-11-24 21:55:59,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3376 to 3185. [2023-11-24 21:55:59,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3185 states, 2955 states have (on average 1.740439932318105) internal successors, (5143), 2974 states have internal predecessors, (5143), 134 states have call successors, (134), 82 states have call predecessors, (134), 94 states have return successors, (179), 136 states have call predecessors, (179), 134 states have call successors, (179) [2023-11-24 21:55:59,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3185 states to 3185 states and 5456 transitions. [2023-11-24 21:55:59,826 INFO L78 Accepts]: Start accepts. Automaton has 3185 states and 5456 transitions. Word has length 51 [2023-11-24 21:55:59,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:55:59,827 INFO L495 AbstractCegarLoop]: Abstraction has 3185 states and 5456 transitions. [2023-11-24 21:55:59,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-24 21:55:59,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3185 states and 5456 transitions. [2023-11-24 21:55:59,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-24 21:55:59,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:55:59,832 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:55:59,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-24 21:55:59,832 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:55:59,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:55:59,833 INFO L85 PathProgramCache]: Analyzing trace with hash -356220306, now seen corresponding path program 1 times [2023-11-24 21:55:59,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:55:59,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668486802] [2023-11-24 21:55:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:55:59,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:55:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:59,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:55:59,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:59,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:55:59,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:59,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:55:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:59,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:55:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:59,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:55:59,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:55:59,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-24 21:55:59,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:00,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:00,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:00,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2023-11-24 21:56:00,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-24 21:56:00,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:00,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668486802] [2023-11-24 21:56:00,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668486802] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:00,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634582625] [2023-11-24 21:56:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:00,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:00,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:00,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:00,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:56:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:00,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:56:00,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 21:56:00,197 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:00,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634582625] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:00,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:00,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 21:56:00,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922738425] [2023-11-24 21:56:00,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:00,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:00,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:00,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:00,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:00,202 INFO L87 Difference]: Start difference. First operand 3185 states and 5456 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:56:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:00,499 INFO L93 Difference]: Finished difference Result 5213 states and 8379 transitions. [2023-11-24 21:56:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:00,499 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 83 [2023-11-24 21:56:00,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:00,526 INFO L225 Difference]: With dead ends: 5213 [2023-11-24 21:56:00,526 INFO L226 Difference]: Without dead ends: 4158 [2023-11-24 21:56:00,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:00,534 INFO L413 NwaCegarLoop]: 4183 mSDtfsCounter, 107 mSDsluCounter, 4077 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 8260 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:00,535 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 8260 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:56:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4158 states. [2023-11-24 21:56:00,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4158 to 4158. [2023-11-24 21:56:00,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 3719 states have (on average 1.6681903737563861) internal successors, (6204), 3751 states have internal predecessors, (6204), 253 states have call successors, (253), 160 states have call predecessors, (253), 184 states have return successors, (376), 262 states have call predecessors, (376), 253 states have call successors, (376) [2023-11-24 21:56:00,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 6833 transitions. [2023-11-24 21:56:00,751 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 6833 transitions. Word has length 83 [2023-11-24 21:56:00,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:00,754 INFO L495 AbstractCegarLoop]: Abstraction has 4158 states and 6833 transitions. [2023-11-24 21:56:00,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:56:00,755 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 6833 transitions. [2023-11-24 21:56:00,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2023-11-24 21:56:00,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:00,764 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:00,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:00,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:00,971 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:00,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:00,972 INFO L85 PathProgramCache]: Analyzing trace with hash 945964566, now seen corresponding path program 1 times [2023-11-24 21:56:00,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:00,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662564633] [2023-11-24 21:56:00,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:00,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:56:01,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:56:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:56:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:56:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:56:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-24 21:56:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2023-11-24 21:56:01,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:01,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2023-11-24 21:56:01,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2023-11-24 21:56:01,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:01,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662564633] [2023-11-24 21:56:01,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662564633] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:01,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671581290] [2023-11-24 21:56:01,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:01,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:01,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:01,108 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:01,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:56:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:01,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:56:01,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:01,326 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-24 21:56:01,326 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:01,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671581290] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:01,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:01,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [6] total 7 [2023-11-24 21:56:01,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074670301] [2023-11-24 21:56:01,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:01,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:01,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:01,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:01,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:01,330 INFO L87 Difference]: Start difference. First operand 4158 states and 6833 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-24 21:56:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:01,596 INFO L93 Difference]: Finished difference Result 8088 states and 12416 transitions. [2023-11-24 21:56:01,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:01,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 106 [2023-11-24 21:56:01,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:01,635 INFO L225 Difference]: With dead ends: 8088 [2023-11-24 21:56:01,635 INFO L226 Difference]: Without dead ends: 6063 [2023-11-24 21:56:01,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:01,645 INFO L413 NwaCegarLoop]: 4087 mSDtfsCounter, 4024 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4024 SdHoareTripleChecker+Valid, 4193 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:01,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4024 Valid, 4193 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:56:01,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2023-11-24 21:56:01,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 6033. [2023-11-24 21:56:01,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6033 states, 5200 states have (on average 1.585576923076923) internal successors, (8245), 5261 states have internal predecessors, (8245), 473 states have call successors, (473), 310 states have call predecessors, (473), 358 states have return successors, (688), 477 states have call predecessors, (688), 473 states have call successors, (688) [2023-11-24 21:56:01,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6033 states to 6033 states and 9406 transitions. [2023-11-24 21:56:01,949 INFO L78 Accepts]: Start accepts. Automaton has 6033 states and 9406 transitions. Word has length 106 [2023-11-24 21:56:01,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:01,950 INFO L495 AbstractCegarLoop]: Abstraction has 6033 states and 9406 transitions. [2023-11-24 21:56:01,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 2 states have internal predecessors, (75), 2 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-24 21:56:01,950 INFO L276 IsEmpty]: Start isEmpty. Operand 6033 states and 9406 transitions. [2023-11-24 21:56:01,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2023-11-24 21:56:01,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:01,963 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:01,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:02,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:02,170 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:02,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:02,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1084511449, now seen corresponding path program 1 times [2023-11-24 21:56:02,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:02,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090098498] [2023-11-24 21:56:02,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:02,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:56:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:56:02,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:56:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:56:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:56:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-24 21:56:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2023-11-24 21:56:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2023-11-24 21:56:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:02,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2023-11-24 21:56:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-24 21:56:02,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:02,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090098498] [2023-11-24 21:56:02,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090098498] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:02,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746440486] [2023-11-24 21:56:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:02,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:02,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:02,304 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:02,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:56:02,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:02,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:56:02,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:02,477 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-24 21:56:02,477 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:02,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746440486] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:02,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:02,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 21:56:02,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007893203] [2023-11-24 21:56:02,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:02,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:02,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:02,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:02,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:02,480 INFO L87 Difference]: Start difference. First operand 6033 states and 9406 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 21:56:02,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:02,752 INFO L93 Difference]: Finished difference Result 9045 states and 13625 transitions. [2023-11-24 21:56:02,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:02,753 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 121 [2023-11-24 21:56:02,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:02,784 INFO L225 Difference]: With dead ends: 9045 [2023-11-24 21:56:02,784 INFO L226 Difference]: Without dead ends: 6321 [2023-11-24 21:56:02,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:02,795 INFO L413 NwaCegarLoop]: 4099 mSDtfsCounter, 4052 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4052 SdHoareTripleChecker+Valid, 4211 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:02,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4052 Valid, 4211 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:56:02,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6321 states. [2023-11-24 21:56:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6321 to 6283. [2023-11-24 21:56:03,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6283 states, 5418 states have (on average 1.5612772240679218) internal successors, (8459), 5479 states have internal predecessors, (8459), 479 states have call successors, (479), 336 states have call predecessors, (479), 384 states have return successors, (720), 483 states have call predecessors, (720), 479 states have call successors, (720) [2023-11-24 21:56:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6283 states to 6283 states and 9658 transitions. [2023-11-24 21:56:03,113 INFO L78 Accepts]: Start accepts. Automaton has 6283 states and 9658 transitions. Word has length 121 [2023-11-24 21:56:03,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:03,113 INFO L495 AbstractCegarLoop]: Abstraction has 6283 states and 9658 transitions. [2023-11-24 21:56:03,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2023-11-24 21:56:03,114 INFO L276 IsEmpty]: Start isEmpty. Operand 6283 states and 9658 transitions. [2023-11-24 21:56:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-24 21:56:03,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:03,127 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 21:56:03,141 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:03,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:03,334 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:03,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:03,335 INFO L85 PathProgramCache]: Analyzing trace with hash -597366064, now seen corresponding path program 1 times [2023-11-24 21:56:03,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:03,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673173469] [2023-11-24 21:56:03,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:03,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:03,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:56:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:56:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:56:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:56:03,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:56:03,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2023-11-24 21:56:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2023-11-24 21:56:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2023-11-24 21:56:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:03,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2023-11-24 21:56:03,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-24 21:56:03,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:03,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673173469] [2023-11-24 21:56:03,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673173469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:03,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048105931] [2023-11-24 21:56:03,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:03,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:03,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:03,483 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:03,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:56:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:03,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:56:03,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:03,623 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-24 21:56:03,623 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:03,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048105931] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:03,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:03,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 21:56:03,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243284283] [2023-11-24 21:56:03,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:03,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:03,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:03,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:03,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:03,626 INFO L87 Difference]: Start difference. First operand 6283 states and 9658 transitions. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-24 21:56:04,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:04,171 INFO L93 Difference]: Finished difference Result 14267 states and 20760 transitions. [2023-11-24 21:56:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:04,172 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) Word has length 122 [2023-11-24 21:56:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:04,211 INFO L225 Difference]: With dead ends: 14267 [2023-11-24 21:56:04,211 INFO L226 Difference]: Without dead ends: 10119 [2023-11-24 21:56:04,227 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:04,227 INFO L413 NwaCegarLoop]: 4181 mSDtfsCounter, 108 mSDsluCounter, 4077 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 8258 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:04,228 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 8258 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:56:04,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10119 states. [2023-11-24 21:56:04,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10119 to 10105. [2023-11-24 21:56:04,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10105 states, 8426 states have (on average 1.4767386660337052) internal successors, (12443), 8547 states have internal predecessors, (12443), 925 states have call successors, (925), 656 states have call predecessors, (925), 752 states have return successors, (1550), 933 states have call predecessors, (1550), 925 states have call successors, (1550) [2023-11-24 21:56:04,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10105 states to 10105 states and 14918 transitions. [2023-11-24 21:56:04,766 INFO L78 Accepts]: Start accepts. Automaton has 10105 states and 14918 transitions. Word has length 122 [2023-11-24 21:56:04,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:04,766 INFO L495 AbstractCegarLoop]: Abstraction has 10105 states and 14918 transitions. [2023-11-24 21:56:04,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (11), 2 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-24 21:56:04,767 INFO L276 IsEmpty]: Start isEmpty. Operand 10105 states and 14918 transitions. [2023-11-24 21:56:04,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 21:56:04,793 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:04,794 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 21:56:04,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:05,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:05,001 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:05,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:05,001 INFO L85 PathProgramCache]: Analyzing trace with hash -1900805994, now seen corresponding path program 1 times [2023-11-24 21:56:05,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:05,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128834244] [2023-11-24 21:56:05,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:05,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:56:05,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:56:05,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:56:05,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:56:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:56:05,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-24 21:56:05,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-24 21:56:05,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:05,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-24 21:56:05,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:05,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-11-24 21:56:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,120 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-24 21:56:05,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:05,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128834244] [2023-11-24 21:56:05,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128834244] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:05,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349961300] [2023-11-24 21:56:05,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:05,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:05,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:05,122 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:05,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:56:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:05,239 INFO L262 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-24 21:56:05,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 68 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-24 21:56:05,284 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:05,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349961300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:05,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:05,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 21:56:05,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552540645] [2023-11-24 21:56:05,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:05,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:05,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:05,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:05,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:05,287 INFO L87 Difference]: Start difference. First operand 10105 states and 14918 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-24 21:56:05,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:05,730 INFO L93 Difference]: Finished difference Result 14225 states and 20906 transitions. [2023-11-24 21:56:05,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:05,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 123 [2023-11-24 21:56:05,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:05,766 INFO L225 Difference]: With dead ends: 14225 [2023-11-24 21:56:05,766 INFO L226 Difference]: Without dead ends: 10123 [2023-11-24 21:56:05,781 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:05,782 INFO L413 NwaCegarLoop]: 4148 mSDtfsCounter, 94 mSDsluCounter, 4071 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 8219 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:05,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 8219 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:56:05,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10123 states. [2023-11-24 21:56:06,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10123 to 10081. [2023-11-24 21:56:06,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10081 states, 8402 states have (on average 1.4623899071649606) internal successors, (12287), 8523 states have internal predecessors, (12287), 925 states have call successors, (925), 656 states have call predecessors, (925), 752 states have return successors, (1550), 933 states have call predecessors, (1550), 925 states have call successors, (1550) [2023-11-24 21:56:06,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10081 states to 10081 states and 14762 transitions. [2023-11-24 21:56:06,434 INFO L78 Accepts]: Start accepts. Automaton has 10081 states and 14762 transitions. Word has length 123 [2023-11-24 21:56:06,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:06,434 INFO L495 AbstractCegarLoop]: Abstraction has 10081 states and 14762 transitions. [2023-11-24 21:56:06,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2023-11-24 21:56:06,435 INFO L276 IsEmpty]: Start isEmpty. Operand 10081 states and 14762 transitions. [2023-11-24 21:56:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-24 21:56:06,456 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:06,456 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 21:56:06,472 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:06,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:06,673 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:06,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:06,673 INFO L85 PathProgramCache]: Analyzing trace with hash 287173494, now seen corresponding path program 1 times [2023-11-24 21:56:06,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:06,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995368048] [2023-11-24 21:56:06,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:06,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:06,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:56:06,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:06,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:56:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:06,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:56:06,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:06,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:56:06,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:06,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:56:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:06,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-24 21:56:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:06,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-24 21:56:06,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:06,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:06,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:06,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-24 21:56:06,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:06,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:06,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:06,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2023-11-24 21:56:06,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-24 21:56:06,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:06,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995368048] [2023-11-24 21:56:06,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995368048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:06,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120213343] [2023-11-24 21:56:06,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:06,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:06,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:06,826 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:06,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:56:06,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:06,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-24 21:56:06,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:06,986 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 52 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2023-11-24 21:56:06,986 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:06,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120213343] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:06,987 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:06,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2023-11-24 21:56:06,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812957988] [2023-11-24 21:56:06,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:06,990 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:56:06,990 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:06,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:56:06,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:06,991 INFO L87 Difference]: Start difference. First operand 10081 states and 14762 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-24 21:56:07,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:07,376 INFO L93 Difference]: Finished difference Result 15923 states and 22966 transitions. [2023-11-24 21:56:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:56:07,377 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 123 [2023-11-24 21:56:07,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:07,408 INFO L225 Difference]: With dead ends: 15923 [2023-11-24 21:56:07,408 INFO L226 Difference]: Without dead ends: 8949 [2023-11-24 21:56:07,427 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:56:07,428 INFO L413 NwaCegarLoop]: 4080 mSDtfsCounter, 4069 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4069 SdHoareTripleChecker+Valid, 4100 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:07,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4069 Valid, 4100 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:56:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8949 states. [2023-11-24 21:56:07,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8949 to 8541. [2023-11-24 21:56:07,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8541 states, 7188 states have (on average 1.444769059543684) internal successors, (10385), 7277 states have internal predecessors, (10385), 753 states have call successors, (753), 534 states have call predecessors, (753), 598 states have return successors, (1098), 745 states have call predecessors, (1098), 753 states have call successors, (1098) [2023-11-24 21:56:07,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8541 states to 8541 states and 12236 transitions. [2023-11-24 21:56:07,904 INFO L78 Accepts]: Start accepts. Automaton has 8541 states and 12236 transitions. Word has length 123 [2023-11-24 21:56:07,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:07,905 INFO L495 AbstractCegarLoop]: Abstraction has 8541 states and 12236 transitions. [2023-11-24 21:56:07,905 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 3 states have internal predecessors, (85), 3 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2023-11-24 21:56:07,905 INFO L276 IsEmpty]: Start isEmpty. Operand 8541 states and 12236 transitions. [2023-11-24 21:56:07,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-24 21:56:07,921 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:07,921 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 21:56:07,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:08,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:08,127 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:08,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:08,127 INFO L85 PathProgramCache]: Analyzing trace with hash 2137579025, now seen corresponding path program 1 times [2023-11-24 21:56:08,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:08,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014348523] [2023-11-24 21:56:08,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:08,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:08,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:56:08,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:08,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:56:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:08,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:56:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:08,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:56:08,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:08,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:56:08,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:08,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-24 21:56:08,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:08,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-24 21:56:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:08,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:08,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-24 21:56:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:08,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:08,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:08,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-24 21:56:08,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-24 21:56:08,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:08,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014348523] [2023-11-24 21:56:08,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014348523] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:08,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184608006] [2023-11-24 21:56:08,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:08,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:08,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:08,327 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:08,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:56:08,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:08,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 426 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:56:08,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:08,656 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-24 21:56:08,657 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:08,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [184608006] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:08,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:08,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-11-24 21:56:08,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241039650] [2023-11-24 21:56:08,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:08,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:56:08,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:08,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:56:08,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:56:08,660 INFO L87 Difference]: Start difference. First operand 8541 states and 12236 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:56:09,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:09,282 INFO L93 Difference]: Finished difference Result 11039 states and 15585 transitions. [2023-11-24 21:56:09,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:56:09,283 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 124 [2023-11-24 21:56:09,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:09,307 INFO L225 Difference]: With dead ends: 11039 [2023-11-24 21:56:09,307 INFO L226 Difference]: Without dead ends: 6877 [2023-11-24 21:56:09,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:56:09,321 INFO L413 NwaCegarLoop]: 4033 mSDtfsCounter, 4086 mSDsluCounter, 8026 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4094 SdHoareTripleChecker+Valid, 12059 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:09,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4094 Valid, 12059 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:56:09,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6877 states. [2023-11-24 21:56:09,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6877 to 6853. [2023-11-24 21:56:09,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 5858 states have (on average 1.4617616934107205) internal successors, (8563), 5911 states have internal predecessors, (8563), 565 states have call successors, (565), 396 states have call predecessors, (565), 428 states have return successors, (766), 553 states have call predecessors, (766), 565 states have call successors, (766) [2023-11-24 21:56:09,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 9894 transitions. [2023-11-24 21:56:09,850 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 9894 transitions. Word has length 124 [2023-11-24 21:56:09,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:09,851 INFO L495 AbstractCegarLoop]: Abstraction has 6853 states and 9894 transitions. [2023-11-24 21:56:09,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:56:09,851 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 9894 transitions. [2023-11-24 21:56:09,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-24 21:56:09,862 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:09,862 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 21:56:09,875 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:10,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:10,068 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:10,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:10,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1254070035, now seen corresponding path program 1 times [2023-11-24 21:56:10,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:10,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584797676] [2023-11-24 21:56:10,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:10,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:10,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:56:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:56:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:56:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:56:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:56:10,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-24 21:56:10,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-24 21:56:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:10,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-24 21:56:10,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:10,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-24 21:56:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-24 21:56:10,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:10,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584797676] [2023-11-24 21:56:10,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1584797676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:10,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108503425] [2023-11-24 21:56:10,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:10,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:10,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:10,226 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:10,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:56:10,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:10,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:56:10,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2023-11-24 21:56:10,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:10,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108503425] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:10,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:10,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2023-11-24 21:56:10,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185812295] [2023-11-24 21:56:10,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:10,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:56:10,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:10,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:56:10,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:56:10,436 INFO L87 Difference]: Start difference. First operand 6853 states and 9894 transitions. Second operand has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:56:11,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:11,051 INFO L93 Difference]: Finished difference Result 10693 states and 14934 transitions. [2023-11-24 21:56:11,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:56:11,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 124 [2023-11-24 21:56:11,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:11,077 INFO L225 Difference]: With dead ends: 10693 [2023-11-24 21:56:11,077 INFO L226 Difference]: Without dead ends: 6507 [2023-11-24 21:56:11,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:56:11,091 INFO L413 NwaCegarLoop]: 4031 mSDtfsCounter, 4116 mSDsluCounter, 8022 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4125 SdHoareTripleChecker+Valid, 12053 SdHoareTripleChecker+Invalid, 209 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:11,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4125 Valid, 12053 Invalid, 209 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:56:11,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6507 states. [2023-11-24 21:56:11,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6507 to 4943. [2023-11-24 21:56:11,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4943 states, 4368 states have (on average 1.5137362637362637) internal successors, (6612), 4397 states have internal predecessors, (6612), 329 states have call successors, (329), 228 states have call predecessors, (329), 244 states have return successors, (439), 321 states have call predecessors, (439), 329 states have call successors, (439) [2023-11-24 21:56:11,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4943 states to 4943 states and 7380 transitions. [2023-11-24 21:56:11,412 INFO L78 Accepts]: Start accepts. Automaton has 4943 states and 7380 transitions. Word has length 124 [2023-11-24 21:56:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:11,412 INFO L495 AbstractCegarLoop]: Abstraction has 4943 states and 7380 transitions. [2023-11-24 21:56:11,413 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.4) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:56:11,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4943 states and 7380 transitions. [2023-11-24 21:56:11,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-24 21:56:11,420 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:11,420 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 21:56:11,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:11,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:11,626 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:11,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:11,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1225569745, now seen corresponding path program 1 times [2023-11-24 21:56:11,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:11,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871999122] [2023-11-24 21:56:11,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:11,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:56:11,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:56:11,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:56:11,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:56:11,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:56:11,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-24 21:56:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-24 21:56:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:11,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-24 21:56:11,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:11,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-24 21:56:11,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,765 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2023-11-24 21:56:11,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:11,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871999122] [2023-11-24 21:56:11,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871999122] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:11,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494110266] [2023-11-24 21:56:11,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:11,767 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:11,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:11,768 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:11,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:56:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:11,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:56:11,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:11,895 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2023-11-24 21:56:11,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:11,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494110266] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:11,896 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:11,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-11-24 21:56:11,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697886716] [2023-11-24 21:56:11,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:11,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:56:11,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:11,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:56:11,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:11,898 INFO L87 Difference]: Start difference. First operand 4943 states and 7380 transitions. Second operand has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:56:12,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:12,140 INFO L93 Difference]: Finished difference Result 6767 states and 9656 transitions. [2023-11-24 21:56:12,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:56:12,140 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 124 [2023-11-24 21:56:12,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:12,152 INFO L225 Difference]: With dead ends: 6767 [2023-11-24 21:56:12,152 INFO L226 Difference]: Without dead ends: 3956 [2023-11-24 21:56:12,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:12,160 INFO L413 NwaCegarLoop]: 4072 mSDtfsCounter, 11 mSDsluCounter, 8137 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 12209 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:12,161 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 12209 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:56:12,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3956 states. [2023-11-24 21:56:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3956 to 3956. [2023-11-24 21:56:12,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3956 states, 3589 states have (on average 1.5753691836166064) internal successors, (5654), 3608 states have internal predecessors, (5654), 207 states have call successors, (207), 146 states have call predecessors, (207), 158 states have return successors, (252), 203 states have call predecessors, (252), 207 states have call successors, (252) [2023-11-24 21:56:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3956 states to 3956 states and 6113 transitions. [2023-11-24 21:56:12,325 INFO L78 Accepts]: Start accepts. Automaton has 3956 states and 6113 transitions. Word has length 124 [2023-11-24 21:56:12,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:12,325 INFO L495 AbstractCegarLoop]: Abstraction has 3956 states and 6113 transitions. [2023-11-24 21:56:12,326 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.75) internal successors, (67), 4 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:56:12,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3956 states and 6113 transitions. [2023-11-24 21:56:12,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-24 21:56:12,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:12,332 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:56:12,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:12,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-24 21:56:12,538 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:12,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:12,538 INFO L85 PathProgramCache]: Analyzing trace with hash 730515729, now seen corresponding path program 1 times [2023-11-24 21:56:12,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:12,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301665260] [2023-11-24 21:56:12,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:12,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:12,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:12,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:56:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:12,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:56:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:12,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:56:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:12,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:56:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:12,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:56:12,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:12,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-24 21:56:12,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:12,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-24 21:56:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:12,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:12,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-24 21:56:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:12,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:12,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:12,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-24 21:56:12,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2023-11-24 21:56:12,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:12,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301665260] [2023-11-24 21:56:12,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301665260] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:56:12,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464010779] [2023-11-24 21:56:12,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:12,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:56:12,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:56:12,666 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:56:12,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:56:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:12,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-24 21:56:12,844 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:56:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-24 21:56:12,859 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:56:12,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464010779] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:12,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:56:12,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 6 [2023-11-24 21:56:12,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363469926] [2023-11-24 21:56:12,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:12,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-24 21:56:12,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-24 21:56:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:12,864 INFO L87 Difference]: Start difference. First operand 3956 states and 6113 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:56:13,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:56:13,036 INFO L93 Difference]: Finished difference Result 5035 states and 7401 transitions. [2023-11-24 21:56:13,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:56:13,037 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 124 [2023-11-24 21:56:13,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:56:13,045 INFO L225 Difference]: With dead ends: 5035 [2023-11-24 21:56:13,045 INFO L226 Difference]: Without dead ends: 2840 [2023-11-24 21:56:13,051 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:13,052 INFO L413 NwaCegarLoop]: 4071 mSDtfsCounter, 2 mSDsluCounter, 8137 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 12208 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:56:13,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 12208 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:56:13,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2023-11-24 21:56:13,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2840. [2023-11-24 21:56:13,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2840 states, 2694 states have (on average 1.7071269487750558) internal successors, (4599), 2702 states have internal predecessors, (4599), 83 states have call successors, (83), 57 states have call predecessors, (83), 61 states have return successors, (87), 81 states have call predecessors, (87), 83 states have call successors, (87) [2023-11-24 21:56:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2840 states to 2840 states and 4769 transitions. [2023-11-24 21:56:13,139 INFO L78 Accepts]: Start accepts. Automaton has 2840 states and 4769 transitions. Word has length 124 [2023-11-24 21:56:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:56:13,139 INFO L495 AbstractCegarLoop]: Abstraction has 2840 states and 4769 transitions. [2023-11-24 21:56:13,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-24 21:56:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 2840 states and 4769 transitions. [2023-11-24 21:56:13,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-24 21:56:13,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:56:13,144 INFO L195 NwaCegarLoop]: trace histogram [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] [2023-11-24 21:56:13,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:56:13,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c90ea947-6695-44e9-8746-3ec61a48420f/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-24 21:56:13,350 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:56:13,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:56:13,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1313641425, now seen corresponding path program 1 times [2023-11-24 21:56:13,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:56:13,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357872288] [2023-11-24 21:56:13,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:56:13,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:56:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:13,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2023-11-24 21:56:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:13,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2023-11-24 21:56:13,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:13,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-24 21:56:13,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:13,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-24 21:56:13,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:13,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-24 21:56:13,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:13,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-24 21:56:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:13,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2023-11-24 21:56:13,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:13,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:13,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:13,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-24 21:56:13,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:13,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2023-11-24 21:56:13,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:13,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2023-11-24 21:56:13,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:56:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2023-11-24 21:56:13,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:56:13,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357872288] [2023-11-24 21:56:13,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357872288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:56:13,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:56:13,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:56:13,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407593860] [2023-11-24 21:56:13,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:56:13,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:56:13,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:56:13,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:56:13,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:56:13,540 INFO L87 Difference]: Start difference. First operand 2840 states and 4769 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 4 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9)