./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/neural-networks/lunarlander_89_safe.c-amalgamation.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/neural-networks/lunarlander_89_safe.c-amalgamation.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya --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 4f41e3028bb7a1d35c0434870f34b243c5420376125474f09b7f824db251e2d4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:18:58,859 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:18:58,928 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:18:58,933 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:18:58,933 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:18:58,960 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:18:58,960 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:18:58,961 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:18:58,962 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:18:58,962 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:18:58,963 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:18:58,964 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:18:58,964 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:18:58,965 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:18:58,965 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:18:58,966 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:18:58,967 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:18:58,967 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:18:58,968 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:18:58,968 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:18:58,969 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:18:58,973 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:18:58,973 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:18:58,974 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:18:58,974 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:18:58,975 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:18:58,975 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:18:58,975 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:18:58,976 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:18:58,976 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:18:58,977 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:18:58,977 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:18:58,977 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:18:58,978 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:18:58,978 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:18:58,978 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:18:58,978 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:18:58,978 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:18:58,979 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:18:58,979 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:18:58,979 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:18:58,979 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:18:58,980 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_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f41e3028bb7a1d35c0434870f34b243c5420376125474f09b7f824db251e2d4 [2023-11-29 02:18:59,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:18:59,240 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:18:59,243 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:18:59,245 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:18:59,245 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:18:59,246 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/neural-networks/lunarlander_89_safe.c-amalgamation.i [2023-11-29 02:19:02,029 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:19:02,415 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:19:02,416 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/sv-benchmarks/c/neural-networks/lunarlander_89_safe.c-amalgamation.i [2023-11-29 02:19:02,445 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/data/00eced350/15c4233d63b94282a3491bb7e3c93d82/FLAG2c3f5b278 [2023-11-29 02:19:02,459 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/data/00eced350/15c4233d63b94282a3491bb7e3c93d82 [2023-11-29 02:19:02,462 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:19:02,464 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:19:02,465 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:19:02,465 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:19:02,471 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:19:02,472 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:19:02" (1/1) ... [2023-11-29 02:19:02,473 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4da3b83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:02, skipping insertion in model container [2023-11-29 02:19:02,473 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:19:02" (1/1) ... [2023-11-29 02:19:02,566 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:19:03,524 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_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/sv-benchmarks/c/neural-networks/lunarlander_89_safe.c-amalgamation.i[64322,64335] [2023-11-29 02:19:03,715 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:19:03,916 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:19:03,962 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_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/sv-benchmarks/c/neural-networks/lunarlander_89_safe.c-amalgamation.i[64322,64335] [2023-11-29 02:19:04,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:19:04,392 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:19:04,392 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04 WrapperNode [2023-11-29 02:19:04,393 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:19:04,394 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:19:04,394 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:19:04,394 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:19:04,401 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04" (1/1) ... [2023-11-29 02:19:04,474 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04" (1/1) ... [2023-11-29 02:19:04,711 INFO L138 Inliner]: procedures = 620, calls = 5148, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 5469 [2023-11-29 02:19:04,712 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:19:04,712 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:19:04,713 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:19:04,713 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:19:04,727 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04" (1/1) ... [2023-11-29 02:19:04,727 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04" (1/1) ... [2023-11-29 02:19:04,777 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04" (1/1) ... [2023-11-29 02:19:04,845 INFO L175 MemorySlicer]: Split 5123 memory accesses to 12 slices as follows [2, 7, 513, 65, 4097, 65, 257, 25, 5, 14, 70, 3]. 80 percent of accesses are in the largest equivalence class. The 5077 initializations are split as follows [2, 7, 512, 64, 4096, 64, 256, 0, 4, 8, 64, 0]. The 14 writes are split as follows [0, 0, 0, 0, 0, 0, 0, 8, 0, 3, 2, 1]. [2023-11-29 02:19:04,846 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04" (1/1) ... [2023-11-29 02:19:04,846 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04" (1/1) ... [2023-11-29 02:19:05,045 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04" (1/1) ... [2023-11-29 02:19:05,058 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04" (1/1) ... [2023-11-29 02:19:05,086 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04" (1/1) ... [2023-11-29 02:19:05,100 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04" (1/1) ... [2023-11-29 02:19:05,148 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:19:05,149 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:19:05,149 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:19:05,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:19:05,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04" (1/1) ... [2023-11-29 02:19:05,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:19:05,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:05,183 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:19:05,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:19:05,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#0 [2023-11-29 02:19:05,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#1 [2023-11-29 02:19:05,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#2 [2023-11-29 02:19:05,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#3 [2023-11-29 02:19:05,287 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#4 [2023-11-29 02:19:05,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#5 [2023-11-29 02:19:05,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#6 [2023-11-29 02:19:05,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#7 [2023-11-29 02:19:05,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#8 [2023-11-29 02:19:05,288 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#9 [2023-11-29 02:19:05,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#10 [2023-11-29 02:19:05,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~real#11 [2023-11-29 02:19:05,289 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:19:05,289 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#0 [2023-11-29 02:19:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#1 [2023-11-29 02:19:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#2 [2023-11-29 02:19:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#3 [2023-11-29 02:19:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#4 [2023-11-29 02:19:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#5 [2023-11-29 02:19:05,290 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#6 [2023-11-29 02:19:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#7 [2023-11-29 02:19:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#8 [2023-11-29 02:19:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#9 [2023-11-29 02:19:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#10 [2023-11-29 02:19:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real#11 [2023-11-29 02:19:05,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#0 [2023-11-29 02:19:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#1 [2023-11-29 02:19:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#2 [2023-11-29 02:19:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#3 [2023-11-29 02:19:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#4 [2023-11-29 02:19:05,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#5 [2023-11-29 02:19:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#6 [2023-11-29 02:19:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#7 [2023-11-29 02:19:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#8 [2023-11-29 02:19:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#9 [2023-11-29 02:19:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#10 [2023-11-29 02:19:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~real#11 [2023-11-29 02:19:05,293 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:19:05,294 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:19:05,294 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:19:05,294 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:19:05,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:19:05,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 02:19:05,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 02:19:05,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2023-11-29 02:19:05,294 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#4 [2023-11-29 02:19:05,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#5 [2023-11-29 02:19:05,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#6 [2023-11-29 02:19:05,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#7 [2023-11-29 02:19:05,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#8 [2023-11-29 02:19:05,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#9 [2023-11-29 02:19:05,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#10 [2023-11-29 02:19:05,295 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#11 [2023-11-29 02:19:05,511 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:19:05,513 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:19:12,827 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:19:13,231 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:19:13,231 INFO L309 CfgBuilder]: Removed 12 assume(true) statements. [2023-11-29 02:19:13,232 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:19:13 BoogieIcfgContainer [2023-11-29 02:19:13,232 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:19:13,234 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:19:13,235 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:19:13,238 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:19:13,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:19:02" (1/3) ... [2023-11-29 02:19:13,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb82c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:19:13, skipping insertion in model container [2023-11-29 02:19:13,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:19:04" (2/3) ... [2023-11-29 02:19:13,240 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1bb82c97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:19:13, skipping insertion in model container [2023-11-29 02:19:13,240 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:19:13" (3/3) ... [2023-11-29 02:19:13,242 INFO L112 eAbstractionObserver]: Analyzing ICFG lunarlander_89_safe.c-amalgamation.i [2023-11-29 02:19:13,265 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:19:13,265 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:19:13,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:19:13,333 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;@36955b95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:19:13,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:19:13,339 INFO L276 IsEmpty]: Start isEmpty. Operand has 58 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 57 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:13,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 02:19:13,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:13,349 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] [2023-11-29 02:19:13,350 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:13,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:13,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1219428462, now seen corresponding path program 1 times [2023-11-29 02:19:13,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:13,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487306743] [2023-11-29 02:19:13,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:13,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:14,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:14,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:19:14,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:14,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487306743] [2023-11-29 02:19:14,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487306743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:19:14,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:19:14,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:19:14,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014937476] [2023-11-29 02:19:14,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:14,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:19:14,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:14,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:19:14,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:19:14,606 INFO L87 Difference]: Start difference. First operand has 58 states, 56 states have (on average 1.7857142857142858) internal successors, (100), 57 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:15,037 INFO L93 Difference]: Finished difference Result 113 states and 195 transitions. [2023-11-29 02:19:15,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:19:15,040 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-29 02:19:15,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:15,049 INFO L225 Difference]: With dead ends: 113 [2023-11-29 02:19:15,049 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 02:19:15,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:19:15,056 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:15,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 59 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:19:15,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 02:19:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-29 02:19:15,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.4) internal successors, (77), 55 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:15,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 77 transitions. [2023-11-29 02:19:15,098 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 77 transitions. Word has length 39 [2023-11-29 02:19:15,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:15,098 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 77 transitions. [2023-11-29 02:19:15,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 19.5) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 77 transitions. [2023-11-29 02:19:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 02:19:15,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:15,101 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] [2023-11-29 02:19:15,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:19:15,101 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:15,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:15,102 INFO L85 PathProgramCache]: Analyzing trace with hash -481557306, now seen corresponding path program 1 times [2023-11-29 02:19:15,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:15,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587168751] [2023-11-29 02:19:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:15,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:15,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:16,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:19:16,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:16,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587168751] [2023-11-29 02:19:16,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587168751] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:19:16,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:19:16,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:19:16,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973273313] [2023-11-29 02:19:16,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:16,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:19:16,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:16,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:19:16,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:19:16,084 INFO L87 Difference]: Start difference. First operand 56 states and 77 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:16,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:16,693 INFO L93 Difference]: Finished difference Result 104 states and 143 transitions. [2023-11-29 02:19:16,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:19:16,694 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-29 02:19:16,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:16,696 INFO L225 Difference]: With dead ends: 104 [2023-11-29 02:19:16,696 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 02:19:16,697 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:19:16,699 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 0 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:16,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:19:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 02:19:16,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-29 02:19:16,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3818181818181818) internal successors, (76), 55 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:16,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 76 transitions. [2023-11-29 02:19:16,709 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 76 transitions. Word has length 39 [2023-11-29 02:19:16,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:16,710 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 76 transitions. [2023-11-29 02:19:16,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:16,710 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 76 transitions. [2023-11-29 02:19:16,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 02:19:16,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:16,712 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] [2023-11-29 02:19:16,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:19:16,713 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:16,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:16,714 INFO L85 PathProgramCache]: Analyzing trace with hash -756316920, now seen corresponding path program 1 times [2023-11-29 02:19:16,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:16,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940960663] [2023-11-29 02:19:16,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:16,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:18,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:19:18,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:18,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940960663] [2023-11-29 02:19:18,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940960663] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:19:18,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:19:18,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:19:18,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567388090] [2023-11-29 02:19:18,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:18,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:19:18,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:18,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:19:18,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:19:18,420 INFO L87 Difference]: Start difference. First operand 56 states and 76 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:19,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:19,195 INFO L93 Difference]: Finished difference Result 87 states and 120 transitions. [2023-11-29 02:19:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:19:19,196 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2023-11-29 02:19:19,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:19,198 INFO L225 Difference]: With dead ends: 87 [2023-11-29 02:19:19,198 INFO L226 Difference]: Without dead ends: 57 [2023-11-29 02:19:19,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:19:19,200 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:19,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:19:19,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-29 02:19:19,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2023-11-29 02:19:19,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.375) internal successors, (77), 56 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 77 transitions. [2023-11-29 02:19:19,210 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 77 transitions. Word has length 39 [2023-11-29 02:19:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:19,210 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 77 transitions. [2023-11-29 02:19:19,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 77 transitions. [2023-11-29 02:19:19,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 02:19:19,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:19,213 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] [2023-11-29 02:19:19,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:19:19,213 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:19,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:19,214 INFO L85 PathProgramCache]: Analyzing trace with hash 1790905389, now seen corresponding path program 1 times [2023-11-29 02:19:19,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:19,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072068712] [2023-11-29 02:19:19,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:19,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:20,676 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:19:20,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:20,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072068712] [2023-11-29 02:19:20,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072068712] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:20,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581254271] [2023-11-29 02:19:20,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:20,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:20,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:20,688 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:20,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:19:22,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:22,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 6102 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:19:22,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:19:22,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:19:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:19:22,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581254271] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:22,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:19:22,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 02:19:22,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175995119] [2023-11-29 02:19:22,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:22,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:19:22,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:22,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:19:22,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:19:22,614 INFO L87 Difference]: Start difference. First operand 57 states and 77 transitions. Second operand has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:23,105 INFO L93 Difference]: Finished difference Result 78 states and 106 transitions. [2023-11-29 02:19:23,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:19:23,106 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2023-11-29 02:19:23,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:23,107 INFO L225 Difference]: With dead ends: 78 [2023-11-29 02:19:23,107 INFO L226 Difference]: Without dead ends: 58 [2023-11-29 02:19:23,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:19:23,109 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 3 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:23,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 108 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:19:23,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-29 02:19:23,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2023-11-29 02:19:23,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.368421052631579) internal successors, (78), 57 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2023-11-29 02:19:23,117 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 40 [2023-11-29 02:19:23,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:23,117 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2023-11-29 02:19:23,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.333333333333334) internal successors, (40), 3 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:23,118 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2023-11-29 02:19:23,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 02:19:23,119 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:23,119 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] [2023-11-29 02:19:23,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:19:23,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:23,320 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:23,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:23,321 INFO L85 PathProgramCache]: Analyzing trace with hash -793809956, now seen corresponding path program 1 times [2023-11-29 02:19:23,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:23,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139180650] [2023-11-29 02:19:23,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:23,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:19:24,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:24,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139180650] [2023-11-29 02:19:24,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139180650] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:24,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017500289] [2023-11-29 02:19:24,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:24,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:24,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:24,729 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:24,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:19:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:26,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 6120 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:19:26,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:26,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:19:26,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:19:26,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:19:26,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017500289] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:26,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:19:26,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 02:19:26,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651035100] [2023-11-29 02:19:26,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:26,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:19:26,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:26,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:19:26,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:19:26,453 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:27,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:27,155 INFO L93 Difference]: Finished difference Result 69 states and 92 transitions. [2023-11-29 02:19:27,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:19:27,156 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-29 02:19:27,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:27,157 INFO L225 Difference]: With dead ends: 69 [2023-11-29 02:19:27,158 INFO L226 Difference]: Without dead ends: 59 [2023-11-29 02:19:27,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:19:27,160 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 3 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:27,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 108 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:19:27,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-29 02:19:27,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2023-11-29 02:19:27,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.3620689655172413) internal successors, (79), 58 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:27,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2023-11-29 02:19:27,168 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 43 [2023-11-29 02:19:27,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:27,169 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2023-11-29 02:19:27,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:27,169 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2023-11-29 02:19:27,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-29 02:19:27,170 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:27,170 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] [2023-11-29 02:19:27,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:19:27,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:27,371 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:27,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:27,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1367907231, now seen corresponding path program 1 times [2023-11-29 02:19:27,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:27,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785971738] [2023-11-29 02:19:27,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:27,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:28,464 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:19:28,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:28,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785971738] [2023-11-29 02:19:28,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785971738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:28,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122681812] [2023-11-29 02:19:28,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:28,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:28,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:28,466 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:28,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:19:29,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:29,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 6138 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:19:29,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-29 02:19:29,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:19:29,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:19:29,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122681812] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:29,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:19:29,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 6 [2023-11-29 02:19:29,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089414522] [2023-11-29 02:19:29,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:29,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:19:29,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:29,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:19:29,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:19:29,925 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:30,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:30,508 INFO L93 Difference]: Finished difference Result 86 states and 116 transitions. [2023-11-29 02:19:30,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:19:30,509 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2023-11-29 02:19:30,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:30,510 INFO L225 Difference]: With dead ends: 86 [2023-11-29 02:19:30,510 INFO L226 Difference]: Without dead ends: 60 [2023-11-29 02:19:30,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:19:30,511 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:30,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 108 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:19:30,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-29 02:19:30,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2023-11-29 02:19:30,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.3559322033898304) internal successors, (80), 59 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:30,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2023-11-29 02:19:30,516 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 46 [2023-11-29 02:19:30,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:30,517 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2023-11-29 02:19:30,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.333333333333334) internal successors, (46), 3 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:30,517 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2023-11-29 02:19:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-29 02:19:30,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:30,518 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] [2023-11-29 02:19:30,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:19:30,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:19:30,719 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:30,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:30,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1170803542, now seen corresponding path program 1 times [2023-11-29 02:19:30,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:30,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447781840] [2023-11-29 02:19:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:30,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:31,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:19:31,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:31,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447781840] [2023-11-29 02:19:31,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447781840] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:31,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393823678] [2023-11-29 02:19:31,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:31,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:31,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:31,876 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:31,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:19:33,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:33,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 6144 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:19:33,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-29 02:19:33,393 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:19:33,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:19:33,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393823678] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:33,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:19:33,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 02:19:33,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470585515] [2023-11-29 02:19:33,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:33,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:19:33,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:33,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:19:33,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:19:33,417 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:33,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:33,904 INFO L93 Difference]: Finished difference Result 76 states and 101 transitions. [2023-11-29 02:19:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:19:33,905 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2023-11-29 02:19:33,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:33,905 INFO L225 Difference]: With dead ends: 76 [2023-11-29 02:19:33,905 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 02:19:33,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:19:33,907 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:33,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 108 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:19:33,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 02:19:33,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2023-11-29 02:19:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.35) internal successors, (81), 60 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:33,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 81 transitions. [2023-11-29 02:19:33,913 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 81 transitions. Word has length 49 [2023-11-29 02:19:33,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:33,913 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 81 transitions. [2023-11-29 02:19:33,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 81 transitions. [2023-11-29 02:19:33,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-29 02:19:33,914 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:33,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:19:33,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:19:34,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 02:19:34,115 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:34,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:34,116 INFO L85 PathProgramCache]: Analyzing trace with hash 559835403, now seen corresponding path program 1 times [2023-11-29 02:19:34,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:34,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791309075] [2023-11-29 02:19:34,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:34,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:34,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:35,084 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:19:35,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:35,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791309075] [2023-11-29 02:19:35,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791309075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:35,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557970909] [2023-11-29 02:19:35,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:35,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:35,086 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:35,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:35,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:19:36,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:36,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 6150 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:19:36,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:36,528 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 02:19:36,529 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:19:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:19:36,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557970909] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:36,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:19:36,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4] total 7 [2023-11-29 02:19:36,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784111848] [2023-11-29 02:19:36,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:36,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:19:36,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:36,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:19:36,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:19:36,547 INFO L87 Difference]: Start difference. First operand 61 states and 81 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:37,120 INFO L93 Difference]: Finished difference Result 66 states and 86 transitions. [2023-11-29 02:19:37,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:19:37,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2023-11-29 02:19:37,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:37,121 INFO L225 Difference]: With dead ends: 66 [2023-11-29 02:19:37,121 INFO L226 Difference]: Without dead ends: 62 [2023-11-29 02:19:37,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:19:37,122 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 6 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:37,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 108 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:19:37,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2023-11-29 02:19:37,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2023-11-29 02:19:37,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 61 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:37,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2023-11-29 02:19:37,129 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 52 [2023-11-29 02:19:37,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:37,130 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2023-11-29 02:19:37,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:37,130 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2023-11-29 02:19:37,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 02:19:37,131 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:37,131 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:19:37,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:19:37,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:37,332 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:37,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:37,333 INFO L85 PathProgramCache]: Analyzing trace with hash 948688438, now seen corresponding path program 1 times [2023-11-29 02:19:37,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:37,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183199208] [2023-11-29 02:19:37,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:37,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:38,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:19:38,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:38,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183199208] [2023-11-29 02:19:38,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183199208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:38,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214025902] [2023-11-29 02:19:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:38,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:38,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:38,284 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:38,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:19:39,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:39,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 6156 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:19:39,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:19:39,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:19:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:19:39,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214025902] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:19:39,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:19:39,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2023-11-29 02:19:39,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156249608] [2023-11-29 02:19:39,966 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:19:39,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:19:39,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:39,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:19:39,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:19:39,967 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:40,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:40,639 INFO L93 Difference]: Finished difference Result 100 states and 135 transitions. [2023-11-29 02:19:40,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:19:40,640 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-29 02:19:40,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:40,640 INFO L225 Difference]: With dead ends: 100 [2023-11-29 02:19:40,641 INFO L226 Difference]: Without dead ends: 65 [2023-11-29 02:19:40,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2023-11-29 02:19:40,642 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 0 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:40,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 167 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:19:40,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-29 02:19:40,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2023-11-29 02:19:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.328125) internal successors, (85), 64 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 85 transitions. [2023-11-29 02:19:40,647 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 85 transitions. Word has length 55 [2023-11-29 02:19:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:40,648 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 85 transitions. [2023-11-29 02:19:40,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:40,648 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 85 transitions. [2023-11-29 02:19:40,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-29 02:19:40,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:40,649 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:19:40,667 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:19:40,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:40,850 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:40,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:40,850 INFO L85 PathProgramCache]: Analyzing trace with hash 52388539, now seen corresponding path program 2 times [2023-11-29 02:19:40,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:40,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276420408] [2023-11-29 02:19:40,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:40,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:42,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:19:42,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:42,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276420408] [2023-11-29 02:19:42,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276420408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:42,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871014947] [2023-11-29 02:19:42,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:19:42,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:42,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:42,147 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:42,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:19:43,842 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:19:43,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:19:43,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 6189 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:19:43,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:43,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:19:43,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:19:43,936 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-29 02:19:43,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1871014947] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:43,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:19:43,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 7] total 10 [2023-11-29 02:19:43,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229224366] [2023-11-29 02:19:43,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:43,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:19:43,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:43,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:19:43,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:19:43,938 INFO L87 Difference]: Start difference. First operand 65 states and 85 transitions. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:44,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:44,479 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2023-11-29 02:19:44,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:19:44,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-29 02:19:44,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:44,481 INFO L225 Difference]: With dead ends: 75 [2023-11-29 02:19:44,481 INFO L226 Difference]: Without dead ends: 66 [2023-11-29 02:19:44,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:19:44,482 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:44,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 108 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:19:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2023-11-29 02:19:44,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2023-11-29 02:19:44,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.323076923076923) internal successors, (86), 65 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:44,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 86 transitions. [2023-11-29 02:19:44,489 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 86 transitions. Word has length 58 [2023-11-29 02:19:44,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:44,490 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 86 transitions. [2023-11-29 02:19:44,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 86 transitions. [2023-11-29 02:19:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 02:19:44,491 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:44,491 INFO L195 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:19:44,510 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:19:44,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:44,692 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:44,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1974177059, now seen corresponding path program 1 times [2023-11-29 02:19:44,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:44,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267481112] [2023-11-29 02:19:44,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:44,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-29 02:19:45,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:45,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267481112] [2023-11-29 02:19:45,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267481112] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:45,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737862590] [2023-11-29 02:19:45,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:45,922 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:45,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:45,923 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:45,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:19:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:47,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 6203 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:19:47,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:47,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-29 02:19:47,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:19:47,438 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-29 02:19:47,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737862590] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:19:47,439 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:19:47,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 4] total 11 [2023-11-29 02:19:47,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304036055] [2023-11-29 02:19:47,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:19:47,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:19:47,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:47,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:19:47,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:19:47,441 INFO L87 Difference]: Start difference. First operand 66 states and 86 transitions. Second operand has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:48,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:48,215 INFO L93 Difference]: Finished difference Result 112 states and 151 transitions. [2023-11-29 02:19:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 02:19:48,215 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2023-11-29 02:19:48,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:48,216 INFO L225 Difference]: With dead ends: 112 [2023-11-29 02:19:48,216 INFO L226 Difference]: Without dead ends: 76 [2023-11-29 02:19:48,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2023-11-29 02:19:48,217 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 12 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:48,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 272 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:19:48,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2023-11-29 02:19:48,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2023-11-29 02:19:48,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.32) internal successors, (99), 75 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:48,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 99 transitions. [2023-11-29 02:19:48,223 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 99 transitions. Word has length 61 [2023-11-29 02:19:48,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:48,223 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 99 transitions. [2023-11-29 02:19:48,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 7.2727272727272725) internal successors, (80), 11 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:48,224 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 99 transitions. [2023-11-29 02:19:48,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 02:19:48,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:48,225 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:19:48,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:19:48,425 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:48,426 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:48,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:48,426 INFO L85 PathProgramCache]: Analyzing trace with hash 381255329, now seen corresponding path program 2 times [2023-11-29 02:19:48,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:48,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542202601] [2023-11-29 02:19:48,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:48,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:48,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:49,658 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2023-11-29 02:19:49,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:49,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542202601] [2023-11-29 02:19:49,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542202601] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:49,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019652936] [2023-11-29 02:19:49,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:19:49,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:49,660 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:49,660 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:49,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:19:51,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:19:51,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:19:51,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 6268 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 02:19:51,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-29 02:19:51,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:19:51,519 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-29 02:19:51,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019652936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:19:51,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:19:51,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12, 7] total 18 [2023-11-29 02:19:51,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216132436] [2023-11-29 02:19:51,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:19:51,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 02:19:51,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:51,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 02:19:51,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:19:51,522 INFO L87 Difference]: Start difference. First operand 76 states and 99 transitions. Second operand has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:53,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:53,622 INFO L93 Difference]: Finished difference Result 140 states and 191 transitions. [2023-11-29 02:19:53,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:19:53,622 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-29 02:19:53,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:53,623 INFO L225 Difference]: With dead ends: 140 [2023-11-29 02:19:53,623 INFO L226 Difference]: Without dead ends: 95 [2023-11-29 02:19:53,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=111, Invalid=351, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:19:53,625 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 46 mSDsluCounter, 460 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 519 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:53,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 519 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 02:19:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2023-11-29 02:19:53,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2023-11-29 02:19:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.3191489361702127) internal successors, (124), 94 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:53,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 124 transitions. [2023-11-29 02:19:53,631 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 124 transitions. Word has length 71 [2023-11-29 02:19:53,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:53,631 INFO L495 AbstractCegarLoop]: Abstraction has 95 states and 124 transitions. [2023-11-29 02:19:53,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 5.5) internal successors, (99), 18 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 124 transitions. [2023-11-29 02:19:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2023-11-29 02:19:53,632 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:53,633 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:19:53,653 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:19:53,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 02:19:53,834 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:53,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:53,834 INFO L85 PathProgramCache]: Analyzing trace with hash 496636838, now seen corresponding path program 3 times [2023-11-29 02:19:53,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:53,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131820327] [2023-11-29 02:19:53,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:53,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-29 02:19:55,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:55,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131820327] [2023-11-29 02:19:55,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131820327] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:55,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940545782] [2023-11-29 02:19:55,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:19:55,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:55,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:55,244 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:55,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:19:56,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:19:56,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:19:56,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 6167 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:19:56,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:19:56,865 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2023-11-29 02:19:56,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:19:56,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940545782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:19:56,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:19:56,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [9] total 11 [2023-11-29 02:19:56,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561600570] [2023-11-29 02:19:56,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:19:56,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:19:56,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:19:56,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:19:56,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:19:56,868 INFO L87 Difference]: Start difference. First operand 95 states and 124 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:57,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:57,465 INFO L93 Difference]: Finished difference Result 159 states and 211 transitions. [2023-11-29 02:19:57,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:19:57,466 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2023-11-29 02:19:57,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:57,467 INFO L225 Difference]: With dead ends: 159 [2023-11-29 02:19:57,467 INFO L226 Difference]: Without dead ends: 98 [2023-11-29 02:19:57,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:19:57,468 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 11 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:57,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 161 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:19:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2023-11-29 02:19:57,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2023-11-29 02:19:57,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.3157894736842106) internal successors, (125), 95 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:57,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 125 transitions. [2023-11-29 02:19:57,476 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 125 transitions. Word has length 90 [2023-11-29 02:19:57,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:57,477 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 125 transitions. [2023-11-29 02:19:57,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:57,477 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 125 transitions. [2023-11-29 02:19:57,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 02:19:57,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:57,478 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:19:57,496 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:19:57,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:19:57,678 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:19:57,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:57,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1394862668, now seen corresponding path program 1 times [2023-11-29 02:19:57,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:57,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284651788] [2023-11-29 02:19:57,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:57,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:58,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-11-29 02:19:59,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:59,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284651788] [2023-11-29 02:19:59,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284651788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:59,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1373012024] [2023-11-29 02:19:59,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:59,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:59,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:59,148 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:59,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:20:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:00,651 INFO L262 TraceCheckSpWp]: Trace formula consists of 6401 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 02:20:00,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:00,691 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2023-11-29 02:20:00,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:20:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2023-11-29 02:20:00,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1373012024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:20:00,731 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:20:00,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 4] total 13 [2023-11-29 02:20:00,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37426733] [2023-11-29 02:20:00,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:20:00,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:20:00,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:00,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:20:00,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:20:00,733 INFO L87 Difference]: Start difference. First operand 96 states and 125 transitions. Second operand has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:01,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:01,562 INFO L93 Difference]: Finished difference Result 170 states and 227 transitions. [2023-11-29 02:20:01,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:20:01,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 93 [2023-11-29 02:20:01,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:01,563 INFO L225 Difference]: With dead ends: 170 [2023-11-29 02:20:01,563 INFO L226 Difference]: Without dead ends: 106 [2023-11-29 02:20:01,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:20:01,565 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 17 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:01,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 273 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:20:01,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-29 02:20:01,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2023-11-29 02:20:01,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.3142857142857143) internal successors, (138), 105 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:01,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 138 transitions. [2023-11-29 02:20:01,574 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 138 transitions. Word has length 93 [2023-11-29 02:20:01,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:01,574 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 138 transitions. [2023-11-29 02:20:01,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.538461538461538) internal successors, (98), 13 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:01,575 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 138 transitions. [2023-11-29 02:20:01,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 02:20:01,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:01,576 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 7, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:01,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:20:01,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:20:01,777 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:01,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:01,777 INFO L85 PathProgramCache]: Analyzing trace with hash 1616924464, now seen corresponding path program 2 times [2023-11-29 02:20:01,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:01,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274675441] [2023-11-29 02:20:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:01,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:02,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2023-11-29 02:20:03,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:03,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274675441] [2023-11-29 02:20:03,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274675441] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:03,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492503046] [2023-11-29 02:20:03,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:20:03,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:03,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:03,570 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:03,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:20:05,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:20:05,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:20:05,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 6466 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 02:20:05,304 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:05,393 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2023-11-29 02:20:05,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:20:05,530 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 178 trivial. 0 not checked. [2023-11-29 02:20:05,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492503046] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:20:05,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:20:05,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 7] total 20 [2023-11-29 02:20:05,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051802307] [2023-11-29 02:20:05,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:20:05,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:20:05,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:05,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:20:05,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:20:05,533 INFO L87 Difference]: Start difference. First operand 106 states and 138 transitions. Second operand has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:07,543 INFO L93 Difference]: Finished difference Result 198 states and 267 transitions. [2023-11-29 02:20:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:20:07,544 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-11-29 02:20:07,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:07,545 INFO L225 Difference]: With dead ends: 198 [2023-11-29 02:20:07,545 INFO L226 Difference]: Without dead ends: 125 [2023-11-29 02:20:07,546 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:20:07,546 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 41 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 511 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:07,547 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 511 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 02:20:07,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2023-11-29 02:20:07,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2023-11-29 02:20:07,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.314516129032258) internal successors, (163), 124 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:07,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 163 transitions. [2023-11-29 02:20:07,557 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 163 transitions. Word has length 103 [2023-11-29 02:20:07,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:07,557 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 163 transitions. [2023-11-29 02:20:07,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.85) internal successors, (117), 20 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:07,557 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 163 transitions. [2023-11-29 02:20:07,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2023-11-29 02:20:07,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:07,559 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:07,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:20:07,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:20:07,760 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:07,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:07,760 INFO L85 PathProgramCache]: Analyzing trace with hash -1635614411, now seen corresponding path program 3 times [2023-11-29 02:20:07,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:07,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525431648] [2023-11-29 02:20:07,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:07,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:09,772 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2023-11-29 02:20:09,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:09,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525431648] [2023-11-29 02:20:09,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525431648] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:09,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677530015] [2023-11-29 02:20:09,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:20:09,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:09,773 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:09,774 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:09,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:20:12,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 02:20:12,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:20:12,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 6167 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 02:20:12,460 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 322 trivial. 0 not checked. [2023-11-29 02:20:12,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:20:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-29 02:20:12,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677530015] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:12,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:20:12,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13, 5] total 18 [2023-11-29 02:20:12,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168353996] [2023-11-29 02:20:12,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:20:12,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:20:12,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:12,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:20:12,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:20:12,570 INFO L87 Difference]: Start difference. First operand 125 states and 163 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:13,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:13,021 INFO L93 Difference]: Finished difference Result 175 states and 230 transitions. [2023-11-29 02:20:13,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:20:13,022 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2023-11-29 02:20:13,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:13,023 INFO L225 Difference]: With dead ends: 175 [2023-11-29 02:20:13,023 INFO L226 Difference]: Without dead ends: 126 [2023-11-29 02:20:13,024 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:20:13,025 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 11 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:13,025 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 108 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:20:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2023-11-29 02:20:13,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2023-11-29 02:20:13,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.312) internal successors, (164), 125 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:13,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 164 transitions. [2023-11-29 02:20:13,036 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 164 transitions. Word has length 122 [2023-11-29 02:20:13,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:13,036 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 164 transitions. [2023-11-29 02:20:13,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:13,037 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 164 transitions. [2023-11-29 02:20:13,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-29 02:20:13,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:13,038 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:13,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 02:20:13,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:20:13,239 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:13,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:13,239 INFO L85 PathProgramCache]: Analyzing trace with hash 336798487, now seen corresponding path program 1 times [2023-11-29 02:20:13,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:13,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169470870] [2023-11-29 02:20:13,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:13,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:15,090 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-11-29 02:20:15,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:15,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169470870] [2023-11-29 02:20:15,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169470870] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:15,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639920545] [2023-11-29 02:20:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:15,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:15,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:15,092 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:15,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:20:16,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:16,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 6599 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 02:20:16,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:16,922 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2023-11-29 02:20:16,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:20:16,990 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-29 02:20:16,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639920545] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:16,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:20:16,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13, 13] total 26 [2023-11-29 02:20:16,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734265293] [2023-11-29 02:20:16,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:20:16,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:20:16,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:16,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:20:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:20:16,992 INFO L87 Difference]: Start difference. First operand 126 states and 164 transitions. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:17,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:17,458 INFO L93 Difference]: Finished difference Result 217 states and 286 transitions. [2023-11-29 02:20:17,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:20:17,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2023-11-29 02:20:17,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:17,460 INFO L225 Difference]: With dead ends: 217 [2023-11-29 02:20:17,460 INFO L226 Difference]: Without dead ends: 127 [2023-11-29 02:20:17,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=586, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:20:17,462 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:17,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:20:17,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-29 02:20:17,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2023-11-29 02:20:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.3095238095238095) internal successors, (165), 126 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:17,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 165 transitions. [2023-11-29 02:20:17,469 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 165 transitions. Word has length 125 [2023-11-29 02:20:17,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:17,469 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 165 transitions. [2023-11-29 02:20:17,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:17,469 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 165 transitions. [2023-11-29 02:20:17,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2023-11-29 02:20:17,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:17,470 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:17,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:20:17,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:20:17,671 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:17,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:17,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1492321777, now seen corresponding path program 1 times [2023-11-29 02:20:17,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:17,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421105245] [2023-11-29 02:20:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:17,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:19,515 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 188 trivial. 0 not checked. [2023-11-29 02:20:19,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:19,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421105245] [2023-11-29 02:20:19,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421105245] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:19,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228985109] [2023-11-29 02:20:19,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:19,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:19,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:19,517 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:19,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:20:21,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:21,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 6604 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 02:20:21,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2023-11-29 02:20:21,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:20:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2023-11-29 02:20:21,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228985109] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:20:21,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:20:21,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 5] total 28 [2023-11-29 02:20:21,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982244800] [2023-11-29 02:20:21,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:20:21,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:20:21,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:21,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:20:21,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:20:21,385 INFO L87 Difference]: Start difference. First operand 127 states and 165 transitions. Second operand has 28 states, 28 states have (on average 4.321428571428571) internal successors, (121), 28 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:24,602 INFO L93 Difference]: Finished difference Result 229 states and 304 transitions. [2023-11-29 02:20:24,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 02:20:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 4.321428571428571) internal successors, (121), 28 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 126 [2023-11-29 02:20:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:24,603 INFO L225 Difference]: With dead ends: 229 [2023-11-29 02:20:24,603 INFO L226 Difference]: Without dead ends: 135 [2023-11-29 02:20:24,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:20:24,605 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 38 mSDsluCounter, 1136 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1198 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:24,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1198 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 02:20:24,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-29 02:20:24,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 133. [2023-11-29 02:20:24,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.2954545454545454) internal successors, (171), 132 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:24,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 171 transitions. [2023-11-29 02:20:24,612 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 171 transitions. Word has length 126 [2023-11-29 02:20:24,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:24,612 INFO L495 AbstractCegarLoop]: Abstraction has 133 states and 171 transitions. [2023-11-29 02:20:24,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 4.321428571428571) internal successors, (121), 28 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:24,612 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 171 transitions. [2023-11-29 02:20:24,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-29 02:20:24,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:24,613 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:24,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 02:20:24,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:20:24,814 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:24,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:24,814 INFO L85 PathProgramCache]: Analyzing trace with hash -323247118, now seen corresponding path program 2 times [2023-11-29 02:20:24,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:24,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725326096] [2023-11-29 02:20:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:24,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:25,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 197 trivial. 0 not checked. [2023-11-29 02:20:26,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:26,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725326096] [2023-11-29 02:20:26,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725326096] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:26,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678802846] [2023-11-29 02:20:26,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:20:26,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:26,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:26,669 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:26,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:20:28,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:20:28,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:20:28,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 6637 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 02:20:28,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 2 proven. 46 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2023-11-29 02:20:28,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:20:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 373 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2023-11-29 02:20:28,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678802846] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:20:28,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:20:28,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 8] total 35 [2023-11-29 02:20:28,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881625259] [2023-11-29 02:20:28,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:20:28,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 02:20:28,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:28,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 02:20:28,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:20:28,924 INFO L87 Difference]: Start difference. First operand 133 states and 171 transitions. Second operand has 35 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 35 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:32,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:32,617 INFO L93 Difference]: Finished difference Result 239 states and 315 transitions. [2023-11-29 02:20:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 02:20:32,617 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 35 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 132 [2023-11-29 02:20:32,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:32,618 INFO L225 Difference]: With dead ends: 239 [2023-11-29 02:20:32,618 INFO L226 Difference]: Without dead ends: 142 [2023-11-29 02:20:32,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 02:20:32,620 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 39 mSDsluCounter, 1446 mSDsCounter, 0 mSdLazyCounter, 1606 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 1509 SdHoareTripleChecker+Invalid, 1606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1606 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:32,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 1509 Invalid, 1606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1606 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 02:20:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-29 02:20:32,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 140. [2023-11-29 02:20:32,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.2877697841726619) internal successors, (179), 139 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:32,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 179 transitions. [2023-11-29 02:20:32,627 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 179 transitions. Word has length 132 [2023-11-29 02:20:32,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:32,628 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 179 transitions. [2023-11-29 02:20:32,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.7142857142857144) internal successors, (130), 35 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:32,628 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 179 transitions. [2023-11-29 02:20:32,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:20:32,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:32,629 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:32,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:20:32,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:32,830 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:32,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:32,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1169026615, now seen corresponding path program 3 times [2023-11-29 02:20:32,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:32,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213562004] [2023-11-29 02:20:32,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:32,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:33,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:34,883 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-11-29 02:20:34,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:34,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213562004] [2023-11-29 02:20:34,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213562004] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:34,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243176912] [2023-11-29 02:20:34,884 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:20:34,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:34,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:34,885 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:34,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:20:38,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:20:38,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:20:38,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 6267 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 02:20:38,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-29 02:20:38,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:20:39,011 INFO L134 CoverageAnalysis]: Checked inductivity of 433 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2023-11-29 02:20:39,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243176912] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:39,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:20:39,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15, 8] total 23 [2023-11-29 02:20:39,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599830001] [2023-11-29 02:20:39,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:20:39,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:20:39,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:39,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:20:39,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:20:39,014 INFO L87 Difference]: Start difference. First operand 140 states and 179 transitions. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:39,582 INFO L93 Difference]: Finished difference Result 151 states and 193 transitions. [2023-11-29 02:20:39,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:20:39,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2023-11-29 02:20:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:39,584 INFO L225 Difference]: With dead ends: 151 [2023-11-29 02:20:39,584 INFO L226 Difference]: Without dead ends: 141 [2023-11-29 02:20:39,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:20:39,585 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:39,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 111 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:20:39,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-29 02:20:39,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2023-11-29 02:20:39,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.2857142857142858) internal successors, (180), 140 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:39,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 180 transitions. [2023-11-29 02:20:39,598 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 180 transitions. Word has length 139 [2023-11-29 02:20:39,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:39,599 INFO L495 AbstractCegarLoop]: Abstraction has 141 states and 180 transitions. [2023-11-29 02:20:39,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:39,599 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 180 transitions. [2023-11-29 02:20:39,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-29 02:20:39,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:39,600 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:39,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:20:39,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:39,801 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:39,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:39,802 INFO L85 PathProgramCache]: Analyzing trace with hash 223997264, now seen corresponding path program 1 times [2023-11-29 02:20:39,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:39,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385263408] [2023-11-29 02:20:39,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:39,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:40,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 224 trivial. 0 not checked. [2023-11-29 02:20:41,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:41,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385263408] [2023-11-29 02:20:41,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385263408] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:41,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711731723] [2023-11-29 02:20:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:41,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:41,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:41,909 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:41,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:20:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:43,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 6680 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 02:20:43,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2023-11-29 02:20:43,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:20:44,333 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2023-11-29 02:20:44,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711731723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:20:44,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:20:44,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24, 13] total 37 [2023-11-29 02:20:44,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158052214] [2023-11-29 02:20:44,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:20:44,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 02:20:44,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:44,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 02:20:44,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1128, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 02:20:44,336 INFO L87 Difference]: Start difference. First operand 141 states and 180 transitions. Second operand has 37 states, 37 states have (on average 4.783783783783784) internal successors, (177), 37 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:54,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:20:54,049 INFO L93 Difference]: Finished difference Result 235 states and 317 transitions. [2023-11-29 02:20:54,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 02:20:54,050 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 4.783783783783784) internal successors, (177), 37 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2023-11-29 02:20:54,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:20:54,051 INFO L225 Difference]: With dead ends: 235 [2023-11-29 02:20:54,051 INFO L226 Difference]: Without dead ends: 182 [2023-11-29 02:20:54,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=444, Invalid=1718, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 02:20:54,053 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 178 mSDsluCounter, 1302 mSDsCounter, 0 mSdLazyCounter, 1755 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1376 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 1755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:20:54,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1376 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 1755 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-29 02:20:54,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2023-11-29 02:20:54,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 180. [2023-11-29 02:20:54,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.2960893854748603) internal successors, (232), 179 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 232 transitions. [2023-11-29 02:20:54,062 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 232 transitions. Word has length 140 [2023-11-29 02:20:54,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:20:54,062 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 232 transitions. [2023-11-29 02:20:54,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 4.783783783783784) internal successors, (177), 37 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:20:54,063 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 232 transitions. [2023-11-29 02:20:54,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-29 02:20:54,063 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:20:54,064 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 13, 13, 13, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:20:54,083 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:20:54,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 02:20:54,264 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:20:54,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:20:54,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1677576107, now seen corresponding path program 2 times [2023-11-29 02:20:54,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:20:54,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018784076] [2023-11-29 02:20:54,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:20:54,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:20:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:20:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 794 trivial. 0 not checked. [2023-11-29 02:20:56,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:20:56,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018784076] [2023-11-29 02:20:56,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018784076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:20:56,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729166298] [2023-11-29 02:20:56,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:20:56,599 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:20:56,599 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:20:56,600 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:20:56,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:20:58,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:20:58,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:20:58,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 6914 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-29 02:20:58,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:20:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 794 trivial. 0 not checked. [2023-11-29 02:20:58,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:20:59,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1041 backedges. 360 proven. 494 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2023-11-29 02:20:59,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729166298] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:20:59,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:20:59,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 30] total 45 [2023-11-29 02:20:59,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422467471] [2023-11-29 02:20:59,739 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:20:59,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 02:20:59,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:20:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 02:20:59,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=1669, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 02:20:59,742 INFO L87 Difference]: Start difference. First operand 180 states and 232 transitions. Second operand has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:23,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:21:23,752 INFO L93 Difference]: Finished difference Result 314 states and 424 transitions. [2023-11-29 02:21:23,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 02:21:23,752 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2023-11-29 02:21:23,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:21:23,754 INFO L225 Difference]: With dead ends: 314 [2023-11-29 02:21:23,754 INFO L226 Difference]: Without dead ends: 225 [2023-11-29 02:21:23,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=714, Invalid=2592, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 02:21:23,756 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 213 mSDsluCounter, 1954 mSDsCounter, 0 mSdLazyCounter, 1826 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 2022 SdHoareTripleChecker+Invalid, 1829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 1826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:21:23,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 2022 Invalid, 1829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 1826 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-29 02:21:23,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-29 02:21:23,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2023-11-29 02:21:23,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.3035714285714286) internal successors, (292), 224 states have internal predecessors, (292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:23,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 292 transitions. [2023-11-29 02:21:23,766 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 292 transitions. Word has length 179 [2023-11-29 02:21:23,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:21:23,766 INFO L495 AbstractCegarLoop]: Abstraction has 225 states and 292 transitions. [2023-11-29 02:21:23,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.133333333333334) internal successors, (186), 45 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:23,767 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 292 transitions. [2023-11-29 02:21:23,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-29 02:21:23,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:21:23,768 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 22, 22, 22, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:23,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:21:23,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:23,968 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:21:23,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:23,969 INFO L85 PathProgramCache]: Analyzing trace with hash 343125904, now seen corresponding path program 3 times [2023-11-29 02:21:23,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:23,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890060439] [2023-11-29 02:21:23,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:23,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:27,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 794 trivial. 0 not checked. [2023-11-29 02:21:27,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:27,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890060439] [2023-11-29 02:21:27,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890060439] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:27,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440776087] [2023-11-29 02:21:27,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:21:27,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:27,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:27,866 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:27,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:21:30,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:21:30,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:21:30,817 INFO L262 TraceCheckSpWp]: Trace formula consists of 6267 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:21:30,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1952 trivial. 0 not checked. [2023-11-29 02:21:30,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:31,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1956 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1954 trivial. 0 not checked. [2023-11-29 02:21:31,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440776087] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:31,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:21:31,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [31, 6] total 37 [2023-11-29 02:21:31,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169289131] [2023-11-29 02:21:31,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:21:31,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:21:31,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:31,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:21:31,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 02:21:31,004 INFO L87 Difference]: Start difference. First operand 225 states and 292 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:21:31,523 INFO L93 Difference]: Finished difference Result 313 states and 409 transitions. [2023-11-29 02:21:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:21:31,524 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 224 [2023-11-29 02:21:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:21:31,525 INFO L225 Difference]: With dead ends: 313 [2023-11-29 02:21:31,525 INFO L226 Difference]: Without dead ends: 226 [2023-11-29 02:21:31,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 442 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 02:21:31,527 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 7 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:21:31,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 163 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:21:31,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-29 02:21:31,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 226. [2023-11-29 02:21:31,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.3022222222222222) internal successors, (293), 225 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:31,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 293 transitions. [2023-11-29 02:21:31,540 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 293 transitions. Word has length 224 [2023-11-29 02:21:31,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:21:31,540 INFO L495 AbstractCegarLoop]: Abstraction has 226 states and 293 transitions. [2023-11-29 02:21:31,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:21:31,541 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 293 transitions. [2023-11-29 02:21:31,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2023-11-29 02:21:31,541 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:21:31,541 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 22, 22, 22, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:21:31,561 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:21:31,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:31,742 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:21:31,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:21:31,742 INFO L85 PathProgramCache]: Analyzing trace with hash 718087622, now seen corresponding path program 1 times [2023-11-29 02:21:31,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:21:31,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795157766] [2023-11-29 02:21:31,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:31,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:21:32,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:35,826 INFO L134 CoverageAnalysis]: Checked inductivity of 1957 backedges. 0 proven. 1162 refuted. 0 times theorem prover too weak. 795 trivial. 0 not checked. [2023-11-29 02:21:35,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:21:35,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795157766] [2023-11-29 02:21:35,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795157766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:21:35,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639040742] [2023-11-29 02:21:35,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:21:35,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:21:35,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:21:35,828 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:21:35,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:21:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:21:37,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 7189 conjuncts, 94 conjunts are in the unsatisfiable core [2023-11-29 02:21:37,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:21:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1957 backedges. 0 proven. 1832 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2023-11-29 02:21:38,482 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:21:40,115 INFO L134 CoverageAnalysis]: Checked inductivity of 1957 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 1242 trivial. 0 not checked. [2023-11-29 02:21:40,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639040742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:21:40,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:21:40,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 48, 25] total 77 [2023-11-29 02:21:40,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181989524] [2023-11-29 02:21:40,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:21:40,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-29 02:21:40,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:21:40,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-29 02:21:40,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=708, Invalid=5144, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 02:21:40,120 INFO L87 Difference]: Start difference. First operand 226 states and 293 transitions. Second operand has 77 states, 77 states have (on average 3.883116883116883) internal successors, (299), 77 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:24:24,200 INFO L93 Difference]: Finished difference Result 393 states and 539 transitions. [2023-11-29 02:24:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-29 02:24:24,201 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.883116883116883) internal successors, (299), 77 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2023-11-29 02:24:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:24:24,202 INFO L225 Difference]: With dead ends: 393 [2023-11-29 02:24:24,202 INFO L226 Difference]: Without dead ends: 303 [2023-11-29 02:24:24,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 158.5s TimeCoverageRelationStatistics Valid=1763, Invalid=7938, Unknown=1, NotChecked=0, Total=9702 [2023-11-29 02:24:24,206 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 709 mSDsluCounter, 4175 mSDsCounter, 0 mSdLazyCounter, 7693 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 709 SdHoareTripleChecker+Valid, 4277 SdHoareTripleChecker+Invalid, 7695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 7693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:24:24,206 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [709 Valid, 4277 Invalid, 7695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 7693 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2023-11-29 02:24:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-29 02:24:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2023-11-29 02:24:24,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 300 states have (on average 1.31) internal successors, (393), 300 states have internal predecessors, (393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:24,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 393 transitions. [2023-11-29 02:24:24,219 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 393 transitions. Word has length 225 [2023-11-29 02:24:24,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:24:24,219 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 393 transitions. [2023-11-29 02:24:24,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.883116883116883) internal successors, (299), 77 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:24:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 393 transitions. [2023-11-29 02:24:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2023-11-29 02:24:24,221 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:24:24,221 INFO L195 NwaCegarLoop]: trace histogram [46, 46, 46, 29, 29, 29, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:24:24,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:24:24,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:24,421 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:24:24,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:24:24,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1259068895, now seen corresponding path program 2 times [2023-11-29 02:24:24,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:24:24,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272098639] [2023-11-29 02:24:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:24:24,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:24:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:24:29,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 3231 trivial. 0 not checked. [2023-11-29 02:24:29,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:24:29,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272098639] [2023-11-29 02:24:29,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272098639] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:24:29,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475072770] [2023-11-29 02:24:29,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:24:29,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:24:29,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:24:29,024 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:24:29,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_855f53d1-aa1f-4a70-90eb-6b4f1045bbc0/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:24:31,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:24:31,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:24:31,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 7639 conjuncts, 122 conjunts are in the unsatisfiable core [2023-11-29 02:24:31,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:24:31,227 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 0 proven. 1247 refuted. 0 times theorem prover too weak. 3231 trivial. 0 not checked. [2023-11-29 02:24:31,228 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:24:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4478 backedges. 1496 proven. 2494 refuted. 0 times theorem prover too weak. 488 trivial. 0 not checked. [2023-11-29 02:24:35,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1475072770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:24:35,760 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:24:35,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 62] total 93 [2023-11-29 02:24:35,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734185813] [2023-11-29 02:24:35,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:24:35,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2023-11-29 02:24:35,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:24:35,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2023-11-29 02:24:35,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1143, Invalid=7413, Unknown=0, NotChecked=0, Total=8556 [2023-11-29 02:24:35,765 INFO L87 Difference]: Start difference. First operand 301 states and 393 transitions. Second operand has 93 states, 93 states have (on average 3.5591397849462365) internal successors, (331), 93 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)