./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann04.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann04.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme --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 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 10:48:41,189 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 10:48:41,319 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 10:48:41,331 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 10:48:41,332 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 10:48:41,359 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 10:48:41,360 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 10:48:41,361 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 10:48:41,362 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 10:48:41,362 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 10:48:41,363 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 10:48:41,364 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 10:48:41,365 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 10:48:41,365 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 10:48:41,366 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 10:48:41,367 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 10:48:41,367 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 10:48:41,368 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 10:48:41,368 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 10:48:41,369 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 10:48:41,369 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 10:48:41,370 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 10:48:41,371 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 10:48:41,371 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 10:48:41,372 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 10:48:41,372 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 10:48:41,373 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 10:48:41,373 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 10:48:41,374 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 10:48:41,374 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 10:48:41,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 10:48:41,375 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:41,375 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 10:48:41,376 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 10:48:41,376 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 10:48:41,376 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 10:48:41,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 10:48:41,377 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 10:48:41,377 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 10:48:41,377 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 10:48:41,378 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 10:48:41,378 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 10:48:41,378 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_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 85f83c4bcdce9397140788b204098e14e4fa25f5b66f064340f4aaa544fbb462 [2023-11-26 10:48:41,613 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 10:48:41,643 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 10:48:41,646 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 10:48:41,647 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 10:48:41,648 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 10:48:41,649 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/recursive/Ackermann04.c [2023-11-26 10:48:44,890 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 10:48:45,105 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 10:48:45,105 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/sv-benchmarks/c/recursive/Ackermann04.c [2023-11-26 10:48:45,114 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/data/4f9359550/94c8dfb919a64a45b22d6c67a498c1b8/FLAG97d8390d9 [2023-11-26 10:48:45,129 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/data/4f9359550/94c8dfb919a64a45b22d6c67a498c1b8 [2023-11-26 10:48:45,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 10:48:45,134 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 10:48:45,136 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:45,136 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 10:48:45,142 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 10:48:45,142 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,144 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eff487f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45, skipping insertion in model container [2023-11-26 10:48:45,144 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,170 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 10:48:45,329 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_77cdbeaa-171b-4ffd-b861-910d984a1e24/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2023-11-26 10:48:45,334 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:45,345 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 10:48:45,358 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_77cdbeaa-171b-4ffd-b861-910d984a1e24/sv-benchmarks/c/recursive/Ackermann04.c[1166,1179] [2023-11-26 10:48:45,359 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 10:48:45,375 INFO L206 MainTranslator]: Completed translation [2023-11-26 10:48:45,375 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45 WrapperNode [2023-11-26 10:48:45,375 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 10:48:45,377 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:45,377 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 10:48:45,377 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 10:48:45,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,392 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,411 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2023-11-26 10:48:45,411 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 10:48:45,412 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 10:48:45,412 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 10:48:45,413 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 10:48:45,424 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,425 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,431 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,443 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 10:48:45,444 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,444 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,447 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,449 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,450 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,451 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,453 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 10:48:45,454 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 10:48:45,454 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 10:48:45,454 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 10:48:45,455 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45" (1/1) ... [2023-11-26 10:48:45,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 10:48:45,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:45,494 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 10:48:45,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 10:48:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 10:48:45,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 10:48:45,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 10:48:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2023-11-26 10:48:45,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2023-11-26 10:48:45,546 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 10:48:45,629 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 10:48:45,632 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 10:48:45,861 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 10:48:45,887 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 10:48:45,887 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-26 10:48:45,888 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:45 BoogieIcfgContainer [2023-11-26 10:48:45,888 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 10:48:45,891 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 10:48:45,891 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 10:48:45,896 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 10:48:45,896 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 10:48:45" (1/3) ... [2023-11-26 10:48:45,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2cdad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:45, skipping insertion in model container [2023-11-26 10:48:45,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 10:48:45" (2/3) ... [2023-11-26 10:48:45,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a2cdad9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 10:48:45, skipping insertion in model container [2023-11-26 10:48:45,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 10:48:45" (3/3) ... [2023-11-26 10:48:45,900 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann04.c [2023-11-26 10:48:45,938 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 10:48:45,938 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 10:48:46,030 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 10:48:46,037 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;@581cc853, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 10:48:46,037 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 10:48:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-26 10:48:46,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-26 10:48:46,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:46,049 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:46,050 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:46,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:46,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1538870455, now seen corresponding path program 1 times [2023-11-26 10:48:46,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:46,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318015555] [2023-11-26 10:48:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:46,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:46,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:46,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:46,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-26 10:48:46,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:46,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318015555] [2023-11-26 10:48:46,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318015555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 10:48:46,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 10:48:46,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 10:48:46,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561871997] [2023-11-26 10:48:46,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 10:48:46,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-26 10:48:46,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:46,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-26 10:48:46,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-26 10:48:46,418 INFO L87 Difference]: Start difference. First operand has 21 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:48:46,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:46,552 INFO L93 Difference]: Finished difference Result 46 states and 68 transitions. [2023-11-26 10:48:46,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-26 10:48:46,555 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-26 10:48:46,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:46,564 INFO L225 Difference]: With dead ends: 46 [2023-11-26 10:48:46,564 INFO L226 Difference]: Without dead ends: 24 [2023-11-26 10:48:46,568 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-26 10:48:46,571 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 13 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:46,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 52 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-26 10:48:46,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-26 10:48:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-26 10:48:46,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2023-11-26 10:48:46,619 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 11 [2023-11-26 10:48:46,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:46,619 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2023-11-26 10:48:46,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-26 10:48:46,620 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2023-11-26 10:48:46,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-26 10:48:46,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:46,623 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:46,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-26 10:48:46,624 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:46,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:46,625 INFO L85 PathProgramCache]: Analyzing trace with hash -108557995, now seen corresponding path program 1 times [2023-11-26 10:48:46,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:46,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343448735] [2023-11-26 10:48:46,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:46,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:46,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:46,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:46,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:46,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:46,838 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:48:46,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:46,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343448735] [2023-11-26 10:48:46,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343448735] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:46,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820293916] [2023-11-26 10:48:46,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:46,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:46,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:46,844 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:46,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 10:48:46,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:46,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 10:48:46,955 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:47,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:48:47,037 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-26 10:48:47,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820293916] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:47,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:47,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-26 10:48:47,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638670625] [2023-11-26 10:48:47,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:47,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-26 10:48:47,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:47,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-26 10:48:47,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-26 10:48:47,151 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 10:48:47,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:47,324 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2023-11-26 10:48:47,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-26 10:48:47,325 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Word has length 18 [2023-11-26 10:48:47,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:47,329 INFO L225 Difference]: With dead ends: 73 [2023-11-26 10:48:47,329 INFO L226 Difference]: Without dead ends: 49 [2023-11-26 10:48:47,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-26 10:48:47,333 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 37 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:47,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 68 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:47,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-26 10:48:47,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-26 10:48:47,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 10 states have call successors, (10), 3 states have call predecessors, (10), 6 states have return successors, (27), 12 states have call predecessors, (27), 10 states have call successors, (27) [2023-11-26 10:48:47,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 75 transitions. [2023-11-26 10:48:47,354 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 75 transitions. Word has length 18 [2023-11-26 10:48:47,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:47,354 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 75 transitions. [2023-11-26 10:48:47,355 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.6) internal successors, (26), 10 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) [2023-11-26 10:48:47,355 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 75 transitions. [2023-11-26 10:48:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-26 10:48:47,359 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:47,359 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:47,365 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-26 10:48:47,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:47,565 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:47,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:47,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1262121361, now seen corresponding path program 1 times [2023-11-26 10:48:47,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:47,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915833955] [2023-11-26 10:48:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:47,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:47,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:47,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:47,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:48,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:48,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:48,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:48,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:48:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:48,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-26 10:48:48,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-26 10:48:48,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:48,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915833955] [2023-11-26 10:48:48,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915833955] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:48,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912351545] [2023-11-26 10:48:48,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:48,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:48,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:48,339 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:48,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 10:48:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:48,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 10:48:48,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2023-11-26 10:48:48,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:49,238 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 6 proven. 27 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2023-11-26 10:48:49,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912351545] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:49,239 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:49,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 11 [2023-11-26 10:48:49,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361430106] [2023-11-26 10:48:49,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:49,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-26 10:48:49,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:49,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-26 10:48:49,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-26 10:48:49,242 INFO L87 Difference]: Start difference. First operand 49 states and 75 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-26 10:48:49,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:49,361 INFO L93 Difference]: Finished difference Result 119 states and 226 transitions. [2023-11-26 10:48:49,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 10:48:49,362 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) Word has length 44 [2023-11-26 10:48:49,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:49,365 INFO L225 Difference]: With dead ends: 119 [2023-11-26 10:48:49,366 INFO L226 Difference]: Without dead ends: 52 [2023-11-26 10:48:49,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 94 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-11-26 10:48:49,369 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 28 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:49,370 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 67 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 10:48:49,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-26 10:48:49,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2023-11-26 10:48:49,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 36 states have internal predecessors, (39), 8 states have call successors, (8), 4 states have call predecessors, (8), 8 states have return successors, (28), 11 states have call predecessors, (28), 8 states have call successors, (28) [2023-11-26 10:48:49,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 75 transitions. [2023-11-26 10:48:49,385 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 75 transitions. Word has length 44 [2023-11-26 10:48:49,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:49,385 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 75 transitions. [2023-11-26 10:48:49,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 5 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (8), 2 states have call predecessors, (8), 5 states have call successors, (8) [2023-11-26 10:48:49,386 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 75 transitions. [2023-11-26 10:48:49,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2023-11-26 10:48:49,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:49,392 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 11, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:49,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:49,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:49,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:49,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:49,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1462639456, now seen corresponding path program 2 times [2023-11-26 10:48:49,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:49,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596890424] [2023-11-26 10:48:49,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:49,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:49,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:49,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:49,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:50,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:50,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:50,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:48:50,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-26 10:48:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:50,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:50,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:48:50,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2023-11-26 10:48:50,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:50,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:50,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:48:50,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 127 proven. 266 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2023-11-26 10:48:50,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:50,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596890424] [2023-11-26 10:48:50,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596890424] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:50,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503621625] [2023-11-26 10:48:50,718 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-26 10:48:50,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:50,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:50,720 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:50,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 10:48:50,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-26 10:48:50,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:50,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-26 10:48:50,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:51,080 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 360 proven. 86 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2023-11-26 10:48:51,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:53,336 INFO L134 CoverageAnalysis]: Checked inductivity of 669 backedges. 115 proven. 179 refuted. 0 times theorem prover too weak. 375 trivial. 0 not checked. [2023-11-26 10:48:53,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503621625] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:53,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:53,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 15] total 32 [2023-11-26 10:48:53,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829708000] [2023-11-26 10:48:53,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:53,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-26 10:48:53,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:53,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-26 10:48:53,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2023-11-26 10:48:53,350 INFO L87 Difference]: Start difference. First operand 52 states and 75 transitions. Second operand has 32 states, 32 states have (on average 2.3125) internal successors, (74), 26 states have internal predecessors, (74), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) [2023-11-26 10:48:54,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:54,410 INFO L93 Difference]: Finished difference Result 125 states and 252 transitions. [2023-11-26 10:48:54,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-26 10:48:54,412 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 26 states have internal predecessors, (74), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) Word has length 118 [2023-11-26 10:48:54,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:54,416 INFO L225 Difference]: With dead ends: 125 [2023-11-26 10:48:54,416 INFO L226 Difference]: Without dead ends: 77 [2023-11-26 10:48:54,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 250 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=585, Invalid=2721, Unknown=0, NotChecked=0, Total=3306 [2023-11-26 10:48:54,425 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 72 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:54,428 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 144 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 10:48:54,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-26 10:48:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2023-11-26 10:48:54,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 52 states have internal predecessors, (57), 13 states have call successors, (13), 7 states have call predecessors, (13), 11 states have return successors, (46), 16 states have call predecessors, (46), 13 states have call successors, (46) [2023-11-26 10:48:54,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 116 transitions. [2023-11-26 10:48:54,464 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 116 transitions. Word has length 118 [2023-11-26 10:48:54,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:54,466 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 116 transitions. [2023-11-26 10:48:54,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.3125) internal successors, (74), 26 states have internal predecessors, (74), 11 states have call successors, (18), 2 states have call predecessors, (18), 15 states have return successors, (32), 18 states have call predecessors, (32), 11 states have call successors, (32) [2023-11-26 10:48:54,467 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 116 transitions. [2023-11-26 10:48:54,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-26 10:48:54,478 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:54,479 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 10, 7, 6, 6, 6, 6, 6, 6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:54,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:54,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:54,686 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:54,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:54,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1076207297, now seen corresponding path program 3 times [2023-11-26 10:48:54,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:54,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812139277] [2023-11-26 10:48:54,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:54,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:54,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:55,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:55,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:55,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:48:55,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-26 10:48:55,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:55,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:55,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:48:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2023-11-26 10:48:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:55,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:48:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-26 10:48:55,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 249 proven. 113 refuted. 0 times theorem prover too weak. 299 trivial. 0 not checked. [2023-11-26 10:48:55,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:55,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812139277] [2023-11-26 10:48:55,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812139277] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:55,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264480761] [2023-11-26 10:48:55,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-26 10:48:55,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:55,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:55,644 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:55,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 10:48:55,776 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2023-11-26 10:48:55,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:55,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 10:48:55,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:55,896 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 236 proven. 115 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2023-11-26 10:48:55,897 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:48:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 661 backedges. 252 proven. 113 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2023-11-26 10:48:57,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264480761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:48:57,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:48:57,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 16] total 23 [2023-11-26 10:48:57,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606211892] [2023-11-26 10:48:57,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:48:57,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 10:48:57,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:48:57,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 10:48:57,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2023-11-26 10:48:57,611 INFO L87 Difference]: Start difference. First operand 76 states and 116 transitions. Second operand has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 21 states have internal predecessors, (62), 11 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2023-11-26 10:48:58,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:48:58,218 INFO L93 Difference]: Finished difference Result 194 states and 391 transitions. [2023-11-26 10:48:58,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-26 10:48:58,219 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 21 states have internal predecessors, (62), 11 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) Word has length 117 [2023-11-26 10:48:58,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:48:58,227 INFO L225 Difference]: With dead ends: 194 [2023-11-26 10:48:58,227 INFO L226 Difference]: Without dead ends: 117 [2023-11-26 10:48:58,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 250 SyntacticMatches, 11 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=482, Invalid=1588, Unknown=0, NotChecked=0, Total=2070 [2023-11-26 10:48:58,231 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 51 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:48:58,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 136 Invalid, 420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:48:58,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-26 10:48:58,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 99. [2023-11-26 10:48:58,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 66 states have (on average 1.121212121212121) internal successors, (74), 67 states have internal predecessors, (74), 18 states have call successors, (18), 9 states have call predecessors, (18), 14 states have return successors, (67), 22 states have call predecessors, (67), 18 states have call successors, (67) [2023-11-26 10:48:58,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 159 transitions. [2023-11-26 10:48:58,278 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 159 transitions. Word has length 117 [2023-11-26 10:48:58,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:48:58,279 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 159 transitions. [2023-11-26 10:48:58,279 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 21 states have internal predecessors, (62), 11 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (23), 10 states have call predecessors, (23), 11 states have call successors, (23) [2023-11-26 10:48:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 159 transitions. [2023-11-26 10:48:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-26 10:48:58,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:48:58,291 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:48:58,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 10:48:58,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:58,501 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:48:58,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:48:58,502 INFO L85 PathProgramCache]: Analyzing trace with hash -702272830, now seen corresponding path program 4 times [2023-11-26 10:48:58,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:48:58,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887028636] [2023-11-26 10:48:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:48:58,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:48:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:58,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:58,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:59,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:59,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:59,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:48:59,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-26 10:48:59,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:59,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:48:59,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-26 10:48:59,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2023-11-26 10:48:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:59,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:48:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:48:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-26 10:48:59,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-26 10:48:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-26 10:48:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:48:59,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 162 proven. 425 refuted. 0 times theorem prover too weak. 659 trivial. 0 not checked. [2023-11-26 10:48:59,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:48:59,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887028636] [2023-11-26 10:48:59,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887028636] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:48:59,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505590487] [2023-11-26 10:48:59,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-26 10:48:59,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:48:59,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:48:59,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:48:59,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 10:48:59,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-26 10:48:59,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:48:59,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-26 10:48:59,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:48:59,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 715 proven. 114 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2023-11-26 10:48:59,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:02,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 165 proven. 425 refuted. 0 times theorem prover too weak. 656 trivial. 0 not checked. [2023-11-26 10:49:02,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505590487] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:02,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:02,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 17] total 24 [2023-11-26 10:49:02,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716052568] [2023-11-26 10:49:02,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:02,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-26 10:49:02,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:02,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-26 10:49:02,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2023-11-26 10:49:02,263 INFO L87 Difference]: Start difference. First operand 99 states and 159 transitions. Second operand has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 21 states have internal predecessors, (70), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-11-26 10:49:02,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:02,932 INFO L93 Difference]: Finished difference Result 208 states and 363 transitions. [2023-11-26 10:49:02,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-26 10:49:02,933 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 21 states have internal predecessors, (70), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) Word has length 156 [2023-11-26 10:49:02,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:02,936 INFO L225 Difference]: With dead ends: 208 [2023-11-26 10:49:02,936 INFO L226 Difference]: Without dead ends: 108 [2023-11-26 10:49:02,939 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 340 SyntacticMatches, 11 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=531, Invalid=1821, Unknown=0, NotChecked=0, Total=2352 [2023-11-26 10:49:02,939 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:02,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 158 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 10:49:02,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2023-11-26 10:49:02,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 99. [2023-11-26 10:49:02,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 66 states have (on average 1.121212121212121) internal successors, (74), 67 states have internal predecessors, (74), 18 states have call successors, (18), 9 states have call predecessors, (18), 14 states have return successors, (59), 22 states have call predecessors, (59), 18 states have call successors, (59) [2023-11-26 10:49:02,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 151 transitions. [2023-11-26 10:49:02,958 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 151 transitions. Word has length 156 [2023-11-26 10:49:02,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:02,958 INFO L495 AbstractCegarLoop]: Abstraction has 99 states and 151 transitions. [2023-11-26 10:49:02,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 21 states have internal predecessors, (70), 12 states have call successors, (18), 2 states have call predecessors, (18), 12 states have return successors, (28), 11 states have call predecessors, (28), 12 states have call successors, (28) [2023-11-26 10:49:02,959 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 151 transitions. [2023-11-26 10:49:02,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2023-11-26 10:49:02,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:02,962 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 9, 9, 9, 9, 9, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:02,980 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:03,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:03,169 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:03,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:03,170 INFO L85 PathProgramCache]: Analyzing trace with hash -511219076, now seen corresponding path program 5 times [2023-11-26 10:49:03,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:03,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25770294] [2023-11-26 10:49:03,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:03,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:03,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:03,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:04,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:04,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:49:04,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-26 10:49:04,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:04,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:04,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:04,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:49:04,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-26 10:49:04,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-26 10:49:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-26 10:49:04,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:04,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:04,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:04,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:04,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:49:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-26 10:49:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-26 10:49:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 445 proven. 284 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2023-11-26 10:49:04,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:04,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25770294] [2023-11-26 10:49:04,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25770294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:04,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130432376] [2023-11-26 10:49:04,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-26 10:49:04,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:04,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:04,796 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:04,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 10:49:04,993 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-26 10:49:04,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:04,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-26 10:49:05,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:05,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 421 proven. 286 refuted. 0 times theorem prover too weak. 539 trivial. 0 not checked. [2023-11-26 10:49:05,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:11,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1246 backedges. 467 proven. 286 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2023-11-26 10:49:11,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130432376] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:11,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:11,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20, 27] total 38 [2023-11-26 10:49:11,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303796333] [2023-11-26 10:49:11,106 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:11,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-26 10:49:11,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:11,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-26 10:49:11,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1220, Unknown=0, NotChecked=0, Total=1406 [2023-11-26 10:49:11,110 INFO L87 Difference]: Start difference. First operand 99 states and 151 transitions. Second operand has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 32 states have internal predecessors, (83), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2023-11-26 10:49:12,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:12,197 INFO L93 Difference]: Finished difference Result 223 states and 398 transitions. [2023-11-26 10:49:12,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-26 10:49:12,200 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 32 states have internal predecessors, (83), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) Word has length 156 [2023-11-26 10:49:12,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:12,205 INFO L225 Difference]: With dead ends: 223 [2023-11-26 10:49:12,206 INFO L226 Difference]: Without dead ends: 132 [2023-11-26 10:49:12,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 331 SyntacticMatches, 14 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=945, Invalid=4025, Unknown=0, NotChecked=0, Total=4970 [2023-11-26 10:49:12,210 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 739 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:12,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [82 Valid, 228 Invalid, 841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 739 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 10:49:12,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2023-11-26 10:49:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2023-11-26 10:49:12,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 75 states have (on average 1.1066666666666667) internal successors, (83), 76 states have internal predecessors, (83), 21 states have call successors, (21), 9 states have call predecessors, (21), 17 states have return successors, (80), 28 states have call predecessors, (80), 21 states have call successors, (80) [2023-11-26 10:49:12,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 184 transitions. [2023-11-26 10:49:12,247 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 184 transitions. Word has length 156 [2023-11-26 10:49:12,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:12,249 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 184 transitions. [2023-11-26 10:49:12,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.1842105263157894) internal successors, (83), 32 states have internal predecessors, (83), 16 states have call successors, (19), 1 states have call predecessors, (19), 18 states have return successors, (36), 18 states have call predecessors, (36), 16 states have call successors, (36) [2023-11-26 10:49:12,249 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 184 transitions. [2023-11-26 10:49:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-26 10:49:12,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:12,254 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 15, 12, 11, 11, 11, 11, 11, 11, 11, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:12,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:12,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:12,460 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:12,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:12,461 INFO L85 PathProgramCache]: Analyzing trace with hash -2140695240, now seen corresponding path program 6 times [2023-11-26 10:49:12,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:12,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721889433] [2023-11-26 10:49:12,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:12,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:12,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:49:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-26 10:49:13,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:49:13,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-26 10:49:13,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-26 10:49:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-26 10:49:13,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:13,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:13,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:14,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:14,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:14,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:49:14,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:14,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-26 10:49:14,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:14,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-26 10:49:14,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:14,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-26 10:49:14,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:14,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2023-11-26 10:49:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 686 proven. 70 refuted. 0 times theorem prover too weak. 985 trivial. 0 not checked. [2023-11-26 10:49:14,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:14,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721889433] [2023-11-26 10:49:14,265 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721889433] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:14,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352432506] [2023-11-26 10:49:14,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-26 10:49:14,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:14,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:14,267 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:14,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 10:49:14,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2023-11-26 10:49:14,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-26 10:49:14,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-26 10:49:14,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 657 proven. 84 refuted. 0 times theorem prover too weak. 1000 trivial. 0 not checked. [2023-11-26 10:49:14,716 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 10:49:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 1741 backedges. 711 proven. 75 refuted. 0 times theorem prover too weak. 955 trivial. 0 not checked. [2023-11-26 10:49:24,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352432506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 10:49:24,471 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-26 10:49:24,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 33] total 38 [2023-11-26 10:49:24,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985711975] [2023-11-26 10:49:24,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-26 10:49:24,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-26 10:49:24,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 10:49:24,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-26 10:49:24,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1248, Unknown=0, NotChecked=0, Total=1406 [2023-11-26 10:49:24,475 INFO L87 Difference]: Start difference. First operand 114 states and 184 transitions. Second operand has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 31 states have internal predecessors, (58), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) [2023-11-26 10:49:26,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 10:49:26,288 INFO L93 Difference]: Finished difference Result 191 states and 342 transitions. [2023-11-26 10:49:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-26 10:49:26,296 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 31 states have internal predecessors, (58), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) Word has length 182 [2023-11-26 10:49:26,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 10:49:26,301 INFO L225 Difference]: With dead ends: 191 [2023-11-26 10:49:26,301 INFO L226 Difference]: Without dead ends: 187 [2023-11-26 10:49:26,305 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 389 SyntacticMatches, 20 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1064, Invalid=4788, Unknown=0, NotChecked=0, Total=5852 [2023-11-26 10:49:26,307 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 79 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 1295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-26 10:49:26,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 262 Invalid, 1295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-26 10:49:26,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-26 10:49:26,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 137. [2023-11-26 10:49:26,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 90 states have (on average 1.0888888888888888) internal successors, (98), 91 states have internal predecessors, (98), 22 states have call successors, (22), 9 states have call predecessors, (22), 24 states have return successors, (121), 36 states have call predecessors, (121), 22 states have call successors, (121) [2023-11-26 10:49:26,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 241 transitions. [2023-11-26 10:49:26,343 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 241 transitions. Word has length 182 [2023-11-26 10:49:26,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 10:49:26,344 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 241 transitions. [2023-11-26 10:49:26,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5263157894736843) internal successors, (58), 31 states have internal predecessors, (58), 6 states have call successors, (9), 1 states have call predecessors, (9), 15 states have return successors, (23), 13 states have call predecessors, (23), 6 states have call successors, (23) [2023-11-26 10:49:26,344 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 241 transitions. [2023-11-26 10:49:26,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2023-11-26 10:49:26,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 10:49:26,347 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 14, 11, 10, 10, 10, 10, 10, 10, 10, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 10:49:26,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 10:49:26,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:26,565 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 10:49:26,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 10:49:26,566 INFO L85 PathProgramCache]: Analyzing trace with hash -1922447937, now seen corresponding path program 7 times [2023-11-26 10:49:26,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 10:49:26,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749571204] [2023-11-26 10:49:26,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 10:49:26,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 10:49:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:26,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:49:27,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2023-11-26 10:49:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:49:27,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-26 10:49:27,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-26 10:49:27,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-26 10:49:27,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:27,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:27,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:28,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2023-11-26 10:49:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:28,050 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2023-11-26 10:49:28,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:28,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-26 10:49:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:28,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2023-11-26 10:49:28,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:28,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2023-11-26 10:49:28,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 502 proven. 372 refuted. 0 times theorem prover too weak. 609 trivial. 0 not checked. [2023-11-26 10:49:28,066 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 10:49:28,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749571204] [2023-11-26 10:49:28,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749571204] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 10:49:28,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304475130] [2023-11-26 10:49:28,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-26 10:49:28,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 10:49:28,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 10:49:28,068 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 10:49:28,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_77cdbeaa-171b-4ffd-b861-910d984a1e24/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 10:49:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 10:49:28,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-26 10:49:28,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 10:49:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 477 proven. 372 refuted. 0 times theorem prover too weak. 634 trivial. 0 not checked. [2023-11-26 10:49:28,574 INFO L327 TraceCheckSpWp]: Computing backward predicates...