./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array21_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array21_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu --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 f1a738dced8b73ebc8edf3e480fddcd32bb19127a8255980e93fab5e96705ab3 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:43,205 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:43,276 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:50:43,282 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:43,282 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:43,308 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:43,309 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:43,310 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:43,311 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:43,311 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:43,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:43,313 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:43,313 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:43,314 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:43,315 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:50:43,315 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:43,316 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:43,316 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:43,317 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:43,317 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:50:43,318 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:43,319 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:50:43,319 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:43,319 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:50:43,322 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:43,323 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:43,323 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:43,324 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:43,324 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:43,325 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:43,326 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:43,327 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:50:43,327 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:43,327 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:43,327 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:43,328 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:50:43,328 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:43,328 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:43,328 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:43,329 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_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f1a738dced8b73ebc8edf3e480fddcd32bb19127a8255980e93fab5e96705ab3 [2023-11-19 07:50:43,603 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:43,635 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:43,637 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:43,639 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:43,639 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:43,640 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/array-patterns/array21_pattern.c [2023-11-19 07:50:46,700 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:50:47,032 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:50:47,033 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/sv-benchmarks/c/array-patterns/array21_pattern.c [2023-11-19 07:50:47,041 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/data/1dbfe4e12/fce61954f6ff467a816677401d260a4e/FLAG38a715f0f [2023-11-19 07:50:47,055 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/data/1dbfe4e12/fce61954f6ff467a816677401d260a4e [2023-11-19 07:50:47,058 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:50:47,059 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:50:47,061 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:47,061 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:50:47,068 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:50:47,069 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:47" (1/1) ... [2023-11-19 07:50:47,070 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43a003e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47, skipping insertion in model container [2023-11-19 07:50:47,070 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:47" (1/1) ... [2023-11-19 07:50:47,101 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:50:47,287 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_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2023-11-19 07:50:47,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:47,325 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:50:47,341 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_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/sv-benchmarks/c/array-patterns/array21_pattern.c[1340,1353] [2023-11-19 07:50:47,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:47,373 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:50:47,374 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47 WrapperNode [2023-11-19 07:50:47,374 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:47,376 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:47,376 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:50:47,376 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:50:47,386 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47" (1/1) ... [2023-11-19 07:50:47,397 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47" (1/1) ... [2023-11-19 07:50:47,428 INFO L138 Inliner]: procedures = 17, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 108 [2023-11-19 07:50:47,429 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:47,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:50:47,430 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:50:47,430 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:50:47,442 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47" (1/1) ... [2023-11-19 07:50:47,442 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47" (1/1) ... [2023-11-19 07:50:47,445 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47" (1/1) ... [2023-11-19 07:50:47,446 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47" (1/1) ... [2023-11-19 07:50:47,453 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47" (1/1) ... [2023-11-19 07:50:47,458 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47" (1/1) ... [2023-11-19 07:50:47,460 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47" (1/1) ... [2023-11-19 07:50:47,462 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47" (1/1) ... [2023-11-19 07:50:47,465 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:50:47,466 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:50:47,466 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:50:47,466 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:50:47,467 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47" (1/1) ... [2023-11-19 07:50:47,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:47,517 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:47,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:50:47,582 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2023-11-19 07:50:47,582 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2023-11-19 07:50:47,583 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:50:47,583 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:50:47,583 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:50:47,583 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:50:47,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:50:47,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:50:47,584 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:50:47,584 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:50:47,584 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:50:47,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:50:47,713 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:50:47,716 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:50:48,019 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:50:48,028 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:50:48,029 INFO L302 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-19 07:50:48,033 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:48 BoogieIcfgContainer [2023-11-19 07:50:48,033 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:50:48,036 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:50:48,037 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:50:48,041 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:50:48,041 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:50:47" (1/3) ... [2023-11-19 07:50:48,042 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f60dbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:48, skipping insertion in model container [2023-11-19 07:50:48,042 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:47" (2/3) ... [2023-11-19 07:50:48,043 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f60dbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:48, skipping insertion in model container [2023-11-19 07:50:48,043 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:48" (3/3) ... [2023-11-19 07:50:48,045 INFO L112 eAbstractionObserver]: Analyzing ICFG array21_pattern.c [2023-11-19 07:50:48,067 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:50:48,068 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:50:48,125 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:48,135 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;@3aa4c524, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:48,136 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:50:48,142 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:50:48,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 07:50:48,150 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:48,151 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:48,151 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:48,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:48,156 INFO L85 PathProgramCache]: Analyzing trace with hash 2136211159, now seen corresponding path program 1 times [2023-11-19 07:50:48,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:48,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785663698] [2023-11-19 07:50:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:48,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:48,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785663698] [2023-11-19 07:50:48,311 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:50:48,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900333056] [2023-11-19 07:50:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:48,312 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:48,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:48,316 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:48,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:50:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,443 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:50:48,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:48,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:50:48,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:48,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900333056] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:48,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:48,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:48,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963561028] [2023-11-19 07:50:48,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:48,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:50:48,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:48,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:50:48,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:50:48,514 INFO L87 Difference]: Start difference. First operand has 40 states, 31 states have (on average 1.5483870967741935) internal successors, (48), 32 states have internal predecessors, (48), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-11-19 07:50:48,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:48,553 INFO L93 Difference]: Finished difference Result 77 states and 115 transitions. [2023-11-19 07:50:48,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:50:48,556 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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 15 [2023-11-19 07:50:48,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:48,564 INFO L225 Difference]: With dead ends: 77 [2023-11-19 07:50:48,564 INFO L226 Difference]: Without dead ends: 36 [2023-11-19 07:50:48,567 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:50:48,572 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:48,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:50:48,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-19 07:50:48,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2023-11-19 07:50:48,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:50:48,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2023-11-19 07:50:48,618 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 15 [2023-11-19 07:50:48,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:48,619 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2023-11-19 07:50:48,619 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 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) [2023-11-19 07:50:48,619 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2023-11-19 07:50:48,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 07:50:48,622 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:48,622 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:48,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:48,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:50:48,837 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:48,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:48,838 INFO L85 PathProgramCache]: Analyzing trace with hash -699940082, now seen corresponding path program 1 times [2023-11-19 07:50:48,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:48,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785664267] [2023-11-19 07:50:48,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:48,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:48,865 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:48,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [276579937] [2023-11-19 07:50:48,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:48,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:48,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:48,867 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:48,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:50:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:48,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 07:50:48,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:50:49,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:49,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:49,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785664267] [2023-11-19 07:50:49,102 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:49,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276579937] [2023-11-19 07:50:49,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276579937] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:49,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:49,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:50:49,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246134487] [2023-11-19 07:50:49,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:49,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:50:49,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:49,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:50:49,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:49,107 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 07:50:49,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:49,236 INFO L93 Difference]: Finished difference Result 82 states and 102 transitions. [2023-11-19 07:50:49,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:50:49,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 35 [2023-11-19 07:50:49,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:49,239 INFO L225 Difference]: With dead ends: 82 [2023-11-19 07:50:49,239 INFO L226 Difference]: Without dead ends: 48 [2023-11-19 07:50:49,240 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:50:49,242 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 19 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:49,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 106 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:50:49,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-19 07:50:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2023-11-19 07:50:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:50:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 47 transitions. [2023-11-19 07:50:49,254 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 47 transitions. Word has length 35 [2023-11-19 07:50:49,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:49,256 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 47 transitions. [2023-11-19 07:50:49,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-19 07:50:49,256 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 47 transitions. [2023-11-19 07:50:49,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 07:50:49,261 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:49,262 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:49,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:49,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:50:49,485 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:49,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:49,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1511137102, now seen corresponding path program 1 times [2023-11-19 07:50:49,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:49,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045145316] [2023-11-19 07:50:49,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:49,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:49,506 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:49,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110225863] [2023-11-19 07:50:49,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:49,508 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:49,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:49,512 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:49,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:50:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:49,622 INFO L262 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:50:49,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:50:49,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:49,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:49,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045145316] [2023-11-19 07:50:49,712 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:49,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110225863] [2023-11-19 07:50:49,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110225863] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:49,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:49,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:50:49,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759169843] [2023-11-19 07:50:49,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:49,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:50:49,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:49,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:50:49,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:50:49,732 INFO L87 Difference]: Start difference. First operand 37 states and 47 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:50:49,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:49,866 INFO L93 Difference]: Finished difference Result 73 states and 94 transitions. [2023-11-19 07:50:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:50:49,867 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2023-11-19 07:50:49,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:49,870 INFO L225 Difference]: With dead ends: 73 [2023-11-19 07:50:49,870 INFO L226 Difference]: Without dead ends: 41 [2023-11-19 07:50:49,871 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:50:49,873 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 29 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:49,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 73 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:50:49,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-19 07:50:49,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2023-11-19 07:50:49,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:50:49,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 49 transitions. [2023-11-19 07:50:49,892 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 49 transitions. Word has length 38 [2023-11-19 07:50:49,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:49,892 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 49 transitions. [2023-11-19 07:50:49,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:50:49,893 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 49 transitions. [2023-11-19 07:50:49,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-19 07:50:49,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:49,895 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:49,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:50,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-11-19 07:50:50,096 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:50,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:50,098 INFO L85 PathProgramCache]: Analyzing trace with hash -50149008, now seen corresponding path program 1 times [2023-11-19 07:50:50,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:50,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803917813] [2023-11-19 07:50:50,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:50,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:50,117 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:50,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [188236253] [2023-11-19 07:50:50,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:50,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:50,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:50,119 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:50,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:50:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:50:50,229 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:50,348 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 07:50:50,348 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-11-19 07:50:50,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:50,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803917813] [2023-11-19 07:50:50,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:50,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188236253] [2023-11-19 07:50:50,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188236253] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:50,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:50,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2023-11-19 07:50:50,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231670043] [2023-11-19 07:50:50,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:50,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:50:50,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:50,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:50:50,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:50:50,462 INFO L87 Difference]: Start difference. First operand 39 states and 49 transitions. Second operand has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:50:50,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:50,601 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2023-11-19 07:50:50,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:50:50,602 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 40 [2023-11-19 07:50:50,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:50,607 INFO L225 Difference]: With dead ends: 52 [2023-11-19 07:50:50,608 INFO L226 Difference]: Without dead ends: 48 [2023-11-19 07:50:50,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:50:50,617 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 57 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:50,619 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 83 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:50:50,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-19 07:50:50,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2023-11-19 07:50:50,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:50:50,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2023-11-19 07:50:50,639 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 40 [2023-11-19 07:50:50,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:50,639 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2023-11-19 07:50:50,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.666666666666667) internal successors, (34), 6 states have internal predecessors, (34), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:50:50,640 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2023-11-19 07:50:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 07:50:50,644 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:50,645 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:50,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:50,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:50,860 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:50,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:50,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1300942485, now seen corresponding path program 1 times [2023-11-19 07:50:50,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:50,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592623814] [2023-11-19 07:50:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:50,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:50,878 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:50,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [71239622] [2023-11-19 07:50:50,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:50,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:50,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:50,881 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:50,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:50:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:50,963 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:50:50,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-19 07:50:51,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:51,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-19 07:50:51,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:51,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592623814] [2023-11-19 07:50:51,141 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:51,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71239622] [2023-11-19 07:50:51,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [71239622] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:51,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:51,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-19 07:50:51,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024034572] [2023-11-19 07:50:51,142 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:51,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:50:51,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:51,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:50:51,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:50:51,144 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:50:51,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:51,385 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2023-11-19 07:50:51,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:50:51,386 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 45 [2023-11-19 07:50:51,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:51,387 INFO L225 Difference]: With dead ends: 85 [2023-11-19 07:50:51,387 INFO L226 Difference]: Without dead ends: 50 [2023-11-19 07:50:51,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:50:51,389 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 82 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:51,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 125 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:50:51,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-19 07:50:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2023-11-19 07:50:51,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:50:51,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 57 transitions. [2023-11-19 07:50:51,401 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 57 transitions. Word has length 45 [2023-11-19 07:50:51,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:51,401 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 57 transitions. [2023-11-19 07:50:51,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2023-11-19 07:50:51,401 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 57 transitions. [2023-11-19 07:50:51,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 07:50:51,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:51,403 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:51,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:51,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:51,616 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:51,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:51,617 INFO L85 PathProgramCache]: Analyzing trace with hash 1544610617, now seen corresponding path program 2 times [2023-11-19 07:50:51,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:51,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280517917] [2023-11-19 07:50:51,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:51,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:51,651 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:51,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [185144136] [2023-11-19 07:50:51,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:50:51,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:51,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:51,662 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:51,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:50:51,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:50:51,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:51,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:50:51,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-19 07:50:51,844 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-11-19 07:50:51,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:51,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280517917] [2023-11-19 07:50:51,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:51,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185144136] [2023-11-19 07:50:51,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185144136] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:51,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:51,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-19 07:50:51,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461963896] [2023-11-19 07:50:51,915 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:51,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:50:51,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:51,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:50:51,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:50:51,917 INFO L87 Difference]: Start difference. First operand 48 states and 57 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:50:52,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:52,161 INFO L93 Difference]: Finished difference Result 106 states and 128 transitions. [2023-11-19 07:50:52,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:50:52,162 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 49 [2023-11-19 07:50:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:52,163 INFO L225 Difference]: With dead ends: 106 [2023-11-19 07:50:52,163 INFO L226 Difference]: Without dead ends: 74 [2023-11-19 07:50:52,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:50:52,165 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 49 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:52,166 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 159 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:50:52,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2023-11-19 07:50:52,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2023-11-19 07:50:52,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 53 states have internal predecessors, (63), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-19 07:50:52,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 73 transitions. [2023-11-19 07:50:52,182 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 73 transitions. Word has length 49 [2023-11-19 07:50:52,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:52,183 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 73 transitions. [2023-11-19 07:50:52,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:50:52,184 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 73 transitions. [2023-11-19 07:50:52,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-19 07:50:52,185 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:52,185 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:50:52,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:52,412 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:52,412 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:52,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:52,413 INFO L85 PathProgramCache]: Analyzing trace with hash -725408594, now seen corresponding path program 3 times [2023-11-19 07:50:52,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:52,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200606441] [2023-11-19 07:50:52,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:52,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:52,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:52,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [4207275] [2023-11-19 07:50:52,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:50:52,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:52,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:52,434 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:52,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:50:52,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-19 07:50:52,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:50:52,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-19 07:50:52,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:52,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 07:50:53,051 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-19 07:50:53,287 INFO L349 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2023-11-19 07:50:53,288 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 30 [2023-11-19 07:50:53,465 INFO L349 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2023-11-19 07:50:53,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 39 treesize of output 44 [2023-11-19 07:50:54,855 INFO L349 Elim1Store]: treesize reduction 106, result has 39.4 percent of original size [2023-11-19 07:50:54,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 96 [2023-11-19 07:50:58,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:50:58,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:50:58,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:50:58,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:50:58,773 INFO L349 Elim1Store]: treesize reduction 152, result has 29.3 percent of original size [2023-11-19 07:50:58,773 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 226 treesize of output 126 [2023-11-19 07:50:59,547 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 50 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-19 07:50:59,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:02,625 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:02,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200606441] [2023-11-19 07:51:02,625 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:51:02,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4207275] [2023-11-19 07:51:02,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4207275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:51:02,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:51:02,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2023-11-19 07:51:02,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802565429] [2023-11-19 07:51:02,627 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:02,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-19 07:51:02,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:02,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-19 07:51:02,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=1890, Unknown=0, NotChecked=0, Total=2070 [2023-11-19 07:51:02,636 INFO L87 Difference]: Start difference. First operand 62 states and 73 transitions. Second operand has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:51:03,912 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [0] [2023-11-19 07:51:09,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:09,544 INFO L93 Difference]: Finished difference Result 165 states and 204 transitions. [2023-11-19 07:51:09,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-19 07:51:09,544 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 63 [2023-11-19 07:51:09,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:09,548 INFO L225 Difference]: With dead ends: 165 [2023-11-19 07:51:09,548 INFO L226 Difference]: Without dead ends: 124 [2023-11-19 07:51:09,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1118 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=416, Invalid=3874, Unknown=0, NotChecked=0, Total=4290 [2023-11-19 07:51:09,552 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 94 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 1169 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 1206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:09,553 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 476 Invalid, 1206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1169 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-19 07:51:09,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2023-11-19 07:51:09,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 100. [2023-11-19 07:51:09,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 9 states have call successors, (9), 5 states have call predecessors, (9), 6 states have return successors, (11), 10 states have call predecessors, (11), 9 states have call successors, (11) [2023-11-19 07:51:09,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 120 transitions. [2023-11-19 07:51:09,586 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 120 transitions. Word has length 63 [2023-11-19 07:51:09,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:09,587 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 120 transitions. [2023-11-19 07:51:09,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.7333333333333334) internal successors, (52), 29 states have internal predecessors, (52), 2 states have call successors, (4), 2 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-19 07:51:09,587 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 120 transitions. [2023-11-19 07:51:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-19 07:51:09,589 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:09,589 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:09,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:09,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:09,802 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:09,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:09,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1172698608, now seen corresponding path program 4 times [2023-11-19 07:51:09,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:09,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106692488] [2023-11-19 07:51:09,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:09,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:09,817 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:51:09,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [57944746] [2023-11-19 07:51:09,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:51:09,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:09,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:09,819 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:09,828 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:51:09,901 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:51:09,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:09,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:51:09,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:10,122 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-19 07:51:10,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 19 proven. 30 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2023-11-19 07:51:10,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:10,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106692488] [2023-11-19 07:51:10,263 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:51:10,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57944746] [2023-11-19 07:51:10,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57944746] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:10,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:51:10,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-19 07:51:10,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441828646] [2023-11-19 07:51:10,264 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:10,266 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:51:10,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:10,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:51:10,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:51:10,268 INFO L87 Difference]: Start difference. First operand 100 states and 120 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:51:10,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:10,602 INFO L93 Difference]: Finished difference Result 316 states and 394 transitions. [2023-11-19 07:51:10,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:51:10,602 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 65 [2023-11-19 07:51:10,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:10,606 INFO L225 Difference]: With dead ends: 316 [2023-11-19 07:51:10,606 INFO L226 Difference]: Without dead ends: 232 [2023-11-19 07:51:10,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:51:10,608 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 182 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 166 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:10,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [186 Valid, 130 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 166 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:51:10,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2023-11-19 07:51:10,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 177. [2023-11-19 07:51:10,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 148 states have (on average 1.195945945945946) internal successors, (177), 148 states have internal predecessors, (177), 17 states have call successors, (17), 9 states have call predecessors, (17), 11 states have return successors, (21), 19 states have call predecessors, (21), 17 states have call successors, (21) [2023-11-19 07:51:10,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 215 transitions. [2023-11-19 07:51:10,668 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 215 transitions. Word has length 65 [2023-11-19 07:51:10,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:10,669 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 215 transitions. [2023-11-19 07:51:10,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:51:10,669 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 215 transitions. [2023-11-19 07:51:10,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 07:51:10,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:10,672 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:10,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-19 07:51:10,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-19 07:51:10,892 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:10,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:10,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1495587368, now seen corresponding path program 1 times [2023-11-19 07:51:10,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:10,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072155889] [2023-11-19 07:51:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:10,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:10,907 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:51:10,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814648402] [2023-11-19 07:51:10,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:10,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:10,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:10,909 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:10,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:51:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:11,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:51:11,015 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2023-11-19 07:51:11,036 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:51:11,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:11,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072155889] [2023-11-19 07:51:11,036 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:51:11,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814648402] [2023-11-19 07:51:11,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814648402] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:51:11,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:51:11,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:51:11,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92382461] [2023-11-19 07:51:11,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:51:11,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:51:11,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:11,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:51:11,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:51:11,044 INFO L87 Difference]: Start difference. First operand 177 states and 215 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 07:51:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:11,127 INFO L93 Difference]: Finished difference Result 275 states and 338 transitions. [2023-11-19 07:51:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:51:11,128 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 69 [2023-11-19 07:51:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:11,130 INFO L225 Difference]: With dead ends: 275 [2023-11-19 07:51:11,130 INFO L226 Difference]: Without dead ends: 197 [2023-11-19 07:51:11,131 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:51:11,132 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 3 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:11,133 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 168 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:51:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2023-11-19 07:51:11,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 187. [2023-11-19 07:51:11,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 156 states have (on average 1.185897435897436) internal successors, (185), 154 states have internal predecessors, (185), 17 states have call successors, (17), 9 states have call predecessors, (17), 13 states have return successors, (25), 23 states have call predecessors, (25), 17 states have call successors, (25) [2023-11-19 07:51:11,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 227 transitions. [2023-11-19 07:51:11,183 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 227 transitions. Word has length 69 [2023-11-19 07:51:11,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:11,183 INFO L495 AbstractCegarLoop]: Abstraction has 187 states and 227 transitions. [2023-11-19 07:51:11,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 4 states have internal predecessors, (34), 1 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 07:51:11,184 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 227 transitions. [2023-11-19 07:51:11,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 07:51:11,186 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:11,186 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:11,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:11,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:11,400 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:11,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:11,401 INFO L85 PathProgramCache]: Analyzing trace with hash 1526607175, now seen corresponding path program 1 times [2023-11-19 07:51:11,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:11,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158785503] [2023-11-19 07:51:11,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:11,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:11,435 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:51:11,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1395444702] [2023-11-19 07:51:11,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:11,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:11,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:11,438 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:11,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:51:11,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:11,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:51:11,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:11,798 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 20 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2023-11-19 07:51:11,798 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:12,127 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 23 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2023-11-19 07:51:12,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:12,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158785503] [2023-11-19 07:51:12,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:51:12,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395444702] [2023-11-19 07:51:12,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395444702] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:12,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:51:12,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2023-11-19 07:51:12,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677813739] [2023-11-19 07:51:12,128 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:12,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:51:12,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:12,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:51:12,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:51:12,130 INFO L87 Difference]: Start difference. First operand 187 states and 227 transitions. Second operand has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-19 07:51:12,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:12,834 INFO L93 Difference]: Finished difference Result 279 states and 324 transitions. [2023-11-19 07:51:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:51:12,835 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) Word has length 69 [2023-11-19 07:51:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:12,837 INFO L225 Difference]: With dead ends: 279 [2023-11-19 07:51:12,837 INFO L226 Difference]: Without dead ends: 211 [2023-11-19 07:51:12,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 117 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:51:12,839 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 77 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 434 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:12,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 272 Invalid, 434 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:51:12,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-19 07:51:12,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 183. [2023-11-19 07:51:12,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 153 states have (on average 1.1699346405228759) internal successors, (179), 152 states have internal predecessors, (179), 16 states have call successors, (16), 10 states have call predecessors, (16), 13 states have return successors, (21), 20 states have call predecessors, (21), 16 states have call successors, (21) [2023-11-19 07:51:12,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 216 transitions. [2023-11-19 07:51:12,892 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 216 transitions. Word has length 69 [2023-11-19 07:51:12,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:12,893 INFO L495 AbstractCegarLoop]: Abstraction has 183 states and 216 transitions. [2023-11-19 07:51:12,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 15 states have internal predecessors, (56), 5 states have call successors, (9), 4 states have call predecessors, (9), 7 states have return successors, (9), 4 states have call predecessors, (9), 5 states have call successors, (9) [2023-11-19 07:51:12,893 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 216 transitions. [2023-11-19 07:51:12,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-19 07:51:12,895 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:12,895 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:12,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:13,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:13,109 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:13,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:13,109 INFO L85 PathProgramCache]: Analyzing trace with hash 385728908, now seen corresponding path program 5 times [2023-11-19 07:51:13,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:13,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606110840] [2023-11-19 07:51:13,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:13,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:13,137 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:51:13,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1045545706] [2023-11-19 07:51:13,137 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:51:13,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:13,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:13,139 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:13,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:51:13,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-19 07:51:13,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:13,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:51:13,232 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:13,361 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 12 proven. 34 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2023-11-19 07:51:13,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:13,465 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2023-11-19 07:51:13,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:13,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606110840] [2023-11-19 07:51:13,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:51:13,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045545706] [2023-11-19 07:51:13,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045545706] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:13,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:51:13,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-19 07:51:13,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021769447] [2023-11-19 07:51:13,466 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:13,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:51:13,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:13,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:51:13,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:51:13,469 INFO L87 Difference]: Start difference. First operand 183 states and 216 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:51:13,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:13,938 INFO L93 Difference]: Finished difference Result 388 states and 460 transitions. [2023-11-19 07:51:13,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:51:13,940 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 69 [2023-11-19 07:51:13,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:13,942 INFO L225 Difference]: With dead ends: 388 [2023-11-19 07:51:13,943 INFO L226 Difference]: Without dead ends: 241 [2023-11-19 07:51:13,943 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 122 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=397, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:51:13,944 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 59 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:13,945 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 204 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-19 07:51:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-19 07:51:14,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 201. [2023-11-19 07:51:14,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 171 states have (on average 1.1754385964912282) internal successors, (201), 170 states have internal predecessors, (201), 16 states have call successors, (16), 10 states have call predecessors, (16), 13 states have return successors, (21), 20 states have call predecessors, (21), 16 states have call successors, (21) [2023-11-19 07:51:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 238 transitions. [2023-11-19 07:51:14,007 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 238 transitions. Word has length 69 [2023-11-19 07:51:14,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:14,007 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 238 transitions. [2023-11-19 07:51:14,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 15 states have internal predecessors, (61), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:51:14,008 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 238 transitions. [2023-11-19 07:51:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-19 07:51:14,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:14,010 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:14,039 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:14,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:14,233 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:14,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:14,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1130035513, now seen corresponding path program 6 times [2023-11-19 07:51:14,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:14,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527069489] [2023-11-19 07:51:14,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:14,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:14,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:51:14,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [421361508] [2023-11-19 07:51:14,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:51:14,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:14,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:14,250 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:14,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:51:14,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-19 07:51:14,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:51:14,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:51:14,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 56 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-19 07:51:14,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 48 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2023-11-19 07:51:14,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:14,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527069489] [2023-11-19 07:51:14,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:51:14,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421361508] [2023-11-19 07:51:14,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421361508] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:14,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:51:14,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-19 07:51:14,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944370602] [2023-11-19 07:51:14,677 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:14,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:51:14,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:51:14,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:51:14,679 INFO L87 Difference]: Start difference. First operand 201 states and 238 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:51:15,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:15,023 INFO L93 Difference]: Finished difference Result 348 states and 397 transitions. [2023-11-19 07:51:15,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:51:15,024 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 70 [2023-11-19 07:51:15,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:15,027 INFO L225 Difference]: With dead ends: 348 [2023-11-19 07:51:15,027 INFO L226 Difference]: Without dead ends: 321 [2023-11-19 07:51:15,028 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 124 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:51:15,029 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 116 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:15,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 174 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:51:15,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2023-11-19 07:51:15,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 270. [2023-11-19 07:51:15,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 227 states have (on average 1.1541850220264318) internal successors, (262), 226 states have internal predecessors, (262), 23 states have call successors, (23), 15 states have call predecessors, (23), 19 states have return successors, (29), 28 states have call predecessors, (29), 23 states have call successors, (29) [2023-11-19 07:51:15,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 314 transitions. [2023-11-19 07:51:15,119 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 314 transitions. Word has length 70 [2023-11-19 07:51:15,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:15,120 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 314 transitions. [2023-11-19 07:51:15,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 12 states have internal predecessors, (64), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:51:15,120 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 314 transitions. [2023-11-19 07:51:15,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-19 07:51:15,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:15,122 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:15,145 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:15,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:15,345 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:15,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:15,346 INFO L85 PathProgramCache]: Analyzing trace with hash -453894759, now seen corresponding path program 7 times [2023-11-19 07:51:15,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:15,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893280516] [2023-11-19 07:51:15,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:15,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:15,358 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:51:15,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1249966197] [2023-11-19 07:51:15,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:51:15,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:15,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:15,361 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:15,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:51:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:15,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:51:15,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:15,576 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 43 proven. 17 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2023-11-19 07:51:15,576 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:15,688 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 33 proven. 19 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2023-11-19 07:51:15,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893280516] [2023-11-19 07:51:15,688 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:51:15,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249966197] [2023-11-19 07:51:15,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249966197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:15,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:51:15,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2023-11-19 07:51:15,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063912442] [2023-11-19 07:51:15,689 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:15,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:51:15,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:15,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:51:15,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:51:15,691 INFO L87 Difference]: Start difference. First operand 270 states and 314 transitions. Second operand has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:51:16,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:51:16,121 INFO L93 Difference]: Finished difference Result 399 states and 463 transitions. [2023-11-19 07:51:16,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:51:16,121 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 77 [2023-11-19 07:51:16,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:51:16,124 INFO L225 Difference]: With dead ends: 399 [2023-11-19 07:51:16,124 INFO L226 Difference]: Without dead ends: 303 [2023-11-19 07:51:16,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2023-11-19 07:51:16,126 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 210 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 07:51:16,126 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 186 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 07:51:16,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-19 07:51:16,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 197. [2023-11-19 07:51:16,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 167 states have (on average 1.1676646706586826) internal successors, (195), 166 states have internal predecessors, (195), 16 states have call successors, (16), 10 states have call predecessors, (16), 13 states have return successors, (21), 20 states have call predecessors, (21), 16 states have call successors, (21) [2023-11-19 07:51:16,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 232 transitions. [2023-11-19 07:51:16,174 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 232 transitions. Word has length 77 [2023-11-19 07:51:16,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:51:16,175 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 232 transitions. [2023-11-19 07:51:16,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.133333333333334) internal successors, (62), 15 states have internal predecessors, (62), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2023-11-19 07:51:16,175 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 232 transitions. [2023-11-19 07:51:16,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2023-11-19 07:51:16,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:51:16,177 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:51:16,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:51:16,400 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:16,400 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:51:16,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:51:16,401 INFO L85 PathProgramCache]: Analyzing trace with hash 2141231294, now seen corresponding path program 1 times [2023-11-19 07:51:16,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:51:16,401 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073918006] [2023-11-19 07:51:16,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:16,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:51:16,413 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:51:16,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143688354] [2023-11-19 07:51:16,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:51:16,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:51:16,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:51:16,415 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:51:16,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22635ab4-4a08-4ea7-9c0a-ec81c4dc592f/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:51:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:51:16,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-19 07:51:16,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:51:16,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-19 07:51:16,960 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-19 07:51:17,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:17,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:17,197 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:17,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-11-19 07:51:17,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:17,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:17,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:17,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:17,320 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:51:17,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-19 07:51:18,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:18,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:18,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:18,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:18,164 INFO L349 Elim1Store]: treesize reduction 72, result has 48.9 percent of original size [2023-11-19 07:51:18,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 96 [2023-11-19 07:51:29,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:29,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:29,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:29,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:51:29,942 INFO L349 Elim1Store]: treesize reduction 460, result has 28.3 percent of original size [2023-11-19 07:51:29,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 9 select indices, 9 select index equivalence classes, 6 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 45 case distinctions, treesize of input 216 treesize of output 253