./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-81.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20b89f8a60d2f6d2584628c0d5624c8090542a805d1f710cb23a05b88ce8a600 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:55:33,209 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:55:33,273 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:55:33,278 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:55:33,279 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:55:33,302 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:55:33,303 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:55:33,303 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:55:33,304 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:55:33,305 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:55:33,305 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:55:33,306 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:55:33,306 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:55:33,307 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:55:33,307 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:55:33,308 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:55:33,308 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:55:33,309 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:55:33,309 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:55:33,310 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:55:33,310 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:55:33,311 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:55:33,311 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:55:33,312 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:55:33,312 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:55:33,313 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:55:33,313 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:55:33,314 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:55:33,314 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:55:33,314 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:55:33,315 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:55:33,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:55:33,316 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:55:33,316 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:55:33,317 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:55:33,317 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:55:33,317 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:55:33,317 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:55:33,317 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:55:33,318 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:55:33,318 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:55:33,318 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:55:33,318 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_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20b89f8a60d2f6d2584628c0d5624c8090542a805d1f710cb23a05b88ce8a600 [2023-11-29 02:55:33,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:55:33,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:55:33,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:55:33,552 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:55:33,552 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:55:33,553 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-81.i [2023-11-29 02:55:36,350 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:55:36,542 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:55:36,543 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-81.i [2023-11-29 02:55:36,553 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/data/565ea3d63/2eab30acd0ec4350950cb49a219c8791/FLAGebab0d29b [2023-11-29 02:55:36,566 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/data/565ea3d63/2eab30acd0ec4350950cb49a219c8791 [2023-11-29 02:55:36,568 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:55:36,570 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:55:36,571 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:55:36,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:55:36,577 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:55:36,578 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:36,579 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e381035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36, skipping insertion in model container [2023-11-29 02:55:36,579 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:36,615 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:55:36,737 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_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-81.i[915,928] [2023-11-29 02:55:36,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:55:36,818 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:55:36,827 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_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-25_file-81.i[915,928] [2023-11-29 02:55:36,862 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:55:36,879 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:55:36,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36 WrapperNode [2023-11-29 02:55:36,879 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:55:36,880 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:55:36,881 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:55:36,881 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:55:36,886 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:36,899 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:36,946 INFO L138 Inliner]: procedures = 26, calls = 54, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 250 [2023-11-29 02:55:36,946 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:55:36,947 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:55:36,947 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:55:36,947 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:55:36,957 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:36,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:36,962 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:36,985 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 02:55:36,985 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:36,985 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:36,998 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:37,003 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:37,006 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:37,010 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:37,015 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:55:37,016 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:55:37,016 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:55:37,016 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:55:37,017 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36" (1/1) ... [2023-11-29 02:55:37,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:55:37,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:55:37,046 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:55:37,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:55:37,083 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:55:37,083 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:55:37,083 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:55:37,083 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:55:37,084 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:55:37,084 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:55:37,167 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:55:37,170 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:55:37,599 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:55:37,630 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:55:37,630 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:55:37,630 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:55:37 BoogieIcfgContainer [2023-11-29 02:55:37,631 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:55:37,634 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:55:37,634 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:55:37,637 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:55:37,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:55:36" (1/3) ... [2023-11-29 02:55:37,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9afe38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:55:37, skipping insertion in model container [2023-11-29 02:55:37,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:55:36" (2/3) ... [2023-11-29 02:55:37,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e9afe38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:55:37, skipping insertion in model container [2023-11-29 02:55:37,639 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:55:37" (3/3) ... [2023-11-29 02:55:37,640 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-25_file-81.i [2023-11-29 02:55:37,660 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:55:37,660 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:55:37,716 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:55:37,723 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;@3d48d889, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:55:37,724 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:55:37,729 INFO L276 IsEmpty]: Start isEmpty. Operand has 100 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 57 states have internal predecessors, (81), 41 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) [2023-11-29 02:55:37,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2023-11-29 02:55:37,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:55:37,751 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:55:37,751 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:55:37,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:55:37,757 INFO L85 PathProgramCache]: Analyzing trace with hash 917100483, now seen corresponding path program 1 times [2023-11-29 02:55:37,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:55:37,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855537710] [2023-11-29 02:55:37,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:55:37,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:55:37,968 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:55:37,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [925435010] [2023-11-29 02:55:37,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:55:37,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:55:37,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:55:37,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:55:37,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:55:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:55:38,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:55:38,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:55:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1180 proven. 207 refuted. 0 times theorem prover too weak. 1893 trivial. 0 not checked. [2023-11-29 02:55:39,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:55:40,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 27 proven. 210 refuted. 0 times theorem prover too weak. 3043 trivial. 0 not checked. [2023-11-29 02:55:40,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:55:40,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855537710] [2023-11-29 02:55:40,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:55:40,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925435010] [2023-11-29 02:55:40,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925435010] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:55:40,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:55:40,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-29 02:55:40,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474765438] [2023-11-29 02:55:40,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:55:40,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:55:40,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:55:40,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:55:40,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:55:40,067 INFO L87 Difference]: Start difference. First operand has 100 states, 56 states have (on average 1.4464285714285714) internal successors, (81), 57 states have internal predecessors, (81), 41 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 41 states have call predecessors, (41), 41 states have call successors, (41) Second operand has 16 states, 16 states have (on average 6.0625) internal successors, (97), 16 states have internal predecessors, (97), 5 states have call successors, (81), 3 states have call predecessors, (81), 7 states have return successors, (82), 4 states have call predecessors, (82), 5 states have call successors, (82) [2023-11-29 02:55:41,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:55:41,142 INFO L93 Difference]: Finished difference Result 292 states and 525 transitions. [2023-11-29 02:55:41,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 02:55:41,145 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.0625) internal successors, (97), 16 states have internal predecessors, (97), 5 states have call successors, (81), 3 states have call predecessors, (81), 7 states have return successors, (82), 4 states have call predecessors, (82), 5 states have call successors, (82) Word has length 247 [2023-11-29 02:55:41,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:55:41,157 INFO L225 Difference]: With dead ends: 292 [2023-11-29 02:55:41,158 INFO L226 Difference]: Without dead ends: 193 [2023-11-29 02:55:41,163 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 481 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=356, Invalid=834, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:55:41,166 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 377 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 380 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:55:41,168 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [380 Valid, 376 Invalid, 760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:55:41,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-29 02:55:41,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 145. [2023-11-29 02:55:41,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 88 states have (on average 1.3068181818181819) internal successors, (115), 89 states have internal predecessors, (115), 51 states have call successors, (51), 5 states have call predecessors, (51), 5 states have return successors, (51), 50 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-29 02:55:41,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 217 transitions. [2023-11-29 02:55:41,238 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 217 transitions. Word has length 247 [2023-11-29 02:55:41,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:55:41,240 INFO L495 AbstractCegarLoop]: Abstraction has 145 states and 217 transitions. [2023-11-29 02:55:41,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.0625) internal successors, (97), 16 states have internal predecessors, (97), 5 states have call successors, (81), 3 states have call predecessors, (81), 7 states have return successors, (82), 4 states have call predecessors, (82), 5 states have call successors, (82) [2023-11-29 02:55:41,241 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 217 transitions. [2023-11-29 02:55:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2023-11-29 02:55:41,247 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:55:41,247 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:55:41,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:55:41,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 02:55:41,453 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:55:41,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:55:41,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1975676743, now seen corresponding path program 1 times [2023-11-29 02:55:41,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:55:41,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862504140] [2023-11-29 02:55:41,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:55:41,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:55:41,521 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:55:41,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [399153547] [2023-11-29 02:55:41,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:55:41,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:55:41,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:55:41,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:55:41,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:55:41,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:55:41,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 02:55:41,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:55:42,041 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1080 proven. 96 refuted. 0 times theorem prover too weak. 2104 trivial. 0 not checked. [2023-11-29 02:55:42,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:55:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 24 proven. 96 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2023-11-29 02:55:42,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:55:42,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862504140] [2023-11-29 02:55:42,326 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:55:42,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399153547] [2023-11-29 02:55:42,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399153547] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:55:42,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:55:42,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2023-11-29 02:55:42,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997966260] [2023-11-29 02:55:42,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:55:42,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 02:55:42,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:55:42,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 02:55:42,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:55:42,332 INFO L87 Difference]: Start difference. First operand 145 states and 217 transitions. Second operand has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 3 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 3 states have call predecessors, (74), 3 states have call successors, (74) [2023-11-29 02:55:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:55:43,094 INFO L93 Difference]: Finished difference Result 412 states and 607 transitions. [2023-11-29 02:55:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:55:43,096 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 3 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 3 states have call predecessors, (74), 3 states have call successors, (74) Word has length 248 [2023-11-29 02:55:43,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:55:43,101 INFO L225 Difference]: With dead ends: 412 [2023-11-29 02:55:43,102 INFO L226 Difference]: Without dead ends: 268 [2023-11-29 02:55:43,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:55:43,105 INFO L413 NwaCegarLoop]: 196 mSDtfsCounter, 206 mSDsluCounter, 548 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:55:43,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [215 Valid, 744 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:55:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2023-11-29 02:55:43,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 186. [2023-11-29 02:55:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 112 states have (on average 1.2232142857142858) internal successors, (137), 114 states have internal predecessors, (137), 62 states have call successors, (62), 11 states have call predecessors, (62), 11 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 02:55:43,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 261 transitions. [2023-11-29 02:55:43,151 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 261 transitions. Word has length 248 [2023-11-29 02:55:43,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:55:43,152 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 261 transitions. [2023-11-29 02:55:43,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 6.6923076923076925) internal successors, (87), 13 states have internal predecessors, (87), 3 states have call successors, (73), 2 states have call predecessors, (73), 4 states have return successors, (74), 3 states have call predecessors, (74), 3 states have call successors, (74) [2023-11-29 02:55:43,152 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 261 transitions. [2023-11-29 02:55:43,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-29 02:55:43,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:55:43,157 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:55:43,164 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:55:43,358 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:55:43,358 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:55:43,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:55:43,359 INFO L85 PathProgramCache]: Analyzing trace with hash 582347940, now seen corresponding path program 1 times [2023-11-29 02:55:43,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:55:43,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872472220] [2023-11-29 02:55:43,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:55:43,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:55:43,407 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:55:43,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [829129921] [2023-11-29 02:55:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:55:43,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:55:43,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:55:43,409 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:55:43,420 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:55:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:55:43,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:55:43,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:55:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 40 proven. 120 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-11-29 02:55:44,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:55:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2023-11-29 02:55:45,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:55:45,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872472220] [2023-11-29 02:55:45,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:55:45,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829129921] [2023-11-29 02:55:45,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829129921] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:55:45,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:55:45,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-29 02:55:45,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136096998] [2023-11-29 02:55:45,098 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:55:45,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:55:45,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:55:45,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:55:45,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:55:45,101 INFO L87 Difference]: Start difference. First operand 186 states and 261 transitions. Second operand has 16 states, 15 states have (on average 5.733333333333333) internal successors, (86), 16 states have internal predecessors, (86), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) [2023-11-29 02:55:46,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:55:46,805 INFO L93 Difference]: Finished difference Result 544 states and 785 transitions. [2023-11-29 02:55:46,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:55:46,806 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.733333333333333) internal successors, (86), 16 states have internal predecessors, (86), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) Word has length 249 [2023-11-29 02:55:46,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:55:46,810 INFO L225 Difference]: With dead ends: 544 [2023-11-29 02:55:46,810 INFO L226 Difference]: Without dead ends: 392 [2023-11-29 02:55:46,811 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 522 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=345, Invalid=915, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:55:46,812 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 697 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 741 SdHoareTripleChecker+Invalid, 1757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:55:46,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 741 Invalid, 1757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 02:55:46,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2023-11-29 02:55:46,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 297. [2023-11-29 02:55:46,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 177 states have (on average 1.2146892655367232) internal successors, (215), 179 states have internal predecessors, (215), 103 states have call successors, (103), 16 states have call predecessors, (103), 16 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 02:55:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 421 transitions. [2023-11-29 02:55:46,899 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 421 transitions. Word has length 249 [2023-11-29 02:55:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:55:46,900 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 421 transitions. [2023-11-29 02:55:46,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.733333333333333) internal successors, (86), 16 states have internal predecessors, (86), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) [2023-11-29 02:55:46,901 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 421 transitions. [2023-11-29 02:55:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-29 02:55:46,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:55:46,905 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:55:46,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 02:55:47,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:55:47,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:55:47,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:55:47,106 INFO L85 PathProgramCache]: Analyzing trace with hash -697515738, now seen corresponding path program 1 times [2023-11-29 02:55:47,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:55:47,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399140402] [2023-11-29 02:55:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:55:47,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:55:47,137 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:55:47,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499037844] [2023-11-29 02:55:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:55:47,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:55:47,138 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:55:47,139 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:55:47,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:55:47,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:55:47,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 02:55:47,314 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:01,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 82 proven. 234 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-29 02:56:01,497 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:56:08,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-29 02:56:08,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:08,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399140402] [2023-11-29 02:56:08,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:56:08,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499037844] [2023-11-29 02:56:08,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499037844] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:56:08,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:56:08,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2023-11-29 02:56:08,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822283788] [2023-11-29 02:56:08,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:56:08,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:56:08,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:08,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:56:08,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:56:08,714 INFO L87 Difference]: Start difference. First operand 297 states and 421 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:56:09,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:09,991 INFO L93 Difference]: Finished difference Result 621 states and 851 transitions. [2023-11-29 02:56:09,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 02:56:09,992 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 249 [2023-11-29 02:56:09,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:09,995 INFO L225 Difference]: With dead ends: 621 [2023-11-29 02:56:09,995 INFO L226 Difference]: Without dead ends: 433 [2023-11-29 02:56:09,997 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:56:09,998 INFO L413 NwaCegarLoop]: 138 mSDtfsCounter, 198 mSDsluCounter, 411 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:09,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 549 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:56:09,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-29 02:56:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 321. [2023-11-29 02:56:10,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 201 states have (on average 1.228855721393035) internal successors, (247), 203 states have internal predecessors, (247), 103 states have call successors, (103), 16 states have call predecessors, (103), 16 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 02:56:10,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 453 transitions. [2023-11-29 02:56:10,059 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 453 transitions. Word has length 249 [2023-11-29 02:56:10,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:10,060 INFO L495 AbstractCegarLoop]: Abstraction has 321 states and 453 transitions. [2023-11-29 02:56:10,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:56:10,060 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 453 transitions. [2023-11-29 02:56:10,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-29 02:56:10,062 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:10,062 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:10,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 02:56:10,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-29 02:56:10,263 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:10,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:10,264 INFO L85 PathProgramCache]: Analyzing trace with hash 3548840, now seen corresponding path program 1 times [2023-11-29 02:56:10,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:10,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325639251] [2023-11-29 02:56:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:10,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:10,298 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:56:10,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894226897] [2023-11-29 02:56:10,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:10,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:10,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:10,300 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:10,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:56:10,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:10,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:56:10,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:10,458 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-29 02:56:10,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:56:10,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:10,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325639251] [2023-11-29 02:56:10,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:56:10,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894226897] [2023-11-29 02:56:10,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894226897] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:56:10,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:56:10,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:56:10,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350608520] [2023-11-29 02:56:10,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:56:10,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:56:10,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:10,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:56:10,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:56:10,463 INFO L87 Difference]: Start difference. First operand 321 states and 453 transitions. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:56:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:10,589 INFO L93 Difference]: Finished difference Result 618 states and 844 transitions. [2023-11-29 02:56:10,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:56:10,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 249 [2023-11-29 02:56:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:10,594 INFO L225 Difference]: With dead ends: 618 [2023-11-29 02:56:10,594 INFO L226 Difference]: Without dead ends: 413 [2023-11-29 02:56:10,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:56:10,596 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 26 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:10,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 302 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:56:10,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-11-29 02:56:10,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 408. [2023-11-29 02:56:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 269 states have (on average 1.2007434944237918) internal successors, (323), 274 states have internal predecessors, (323), 115 states have call successors, (115), 23 states have call predecessors, (115), 23 states have return successors, (115), 110 states have call predecessors, (115), 115 states have call successors, (115) [2023-11-29 02:56:10,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 553 transitions. [2023-11-29 02:56:10,684 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 553 transitions. Word has length 249 [2023-11-29 02:56:10,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:10,685 INFO L495 AbstractCegarLoop]: Abstraction has 408 states and 553 transitions. [2023-11-29 02:56:10,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:56:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 553 transitions. [2023-11-29 02:56:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-29 02:56:10,687 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:10,687 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:10,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:56:10,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:10,888 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:10,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:10,888 INFO L85 PathProgramCache]: Analyzing trace with hash -53709462, now seen corresponding path program 1 times [2023-11-29 02:56:10,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:10,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536582824] [2023-11-29 02:56:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:10,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:10,911 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:56:10,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2018874704] [2023-11-29 02:56:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:10,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:10,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:10,912 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:10,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:56:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:11,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:56:11,030 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:11,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-29 02:56:11,053 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:56:11,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:11,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536582824] [2023-11-29 02:56:11,054 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:56:11,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018874704] [2023-11-29 02:56:11,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018874704] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:56:11,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:56:11,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:56:11,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522956790] [2023-11-29 02:56:11,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:56:11,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:56:11,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:11,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:56:11,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:56:11,056 INFO L87 Difference]: Start difference. First operand 408 states and 553 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:56:11,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:11,197 INFO L93 Difference]: Finished difference Result 695 states and 928 transitions. [2023-11-29 02:56:11,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:56:11,198 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 249 [2023-11-29 02:56:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:11,201 INFO L225 Difference]: With dead ends: 695 [2023-11-29 02:56:11,202 INFO L226 Difference]: Without dead ends: 425 [2023-11-29 02:56:11,203 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:56:11,204 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 65 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 426 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:11,204 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 426 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:56:11,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-11-29 02:56:11,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 355. [2023-11-29 02:56:11,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 231 states have (on average 1.1818181818181819) internal successors, (273), 233 states have internal predecessors, (273), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 02:56:11,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 479 transitions. [2023-11-29 02:56:11,267 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 479 transitions. Word has length 249 [2023-11-29 02:56:11,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:11,267 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 479 transitions. [2023-11-29 02:56:11,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:56:11,268 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 479 transitions. [2023-11-29 02:56:11,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-29 02:56:11,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:11,270 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:11,275 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:56:11,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:11,471 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:11,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:11,471 INFO L85 PathProgramCache]: Analyzing trace with hash -439350300, now seen corresponding path program 1 times [2023-11-29 02:56:11,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:11,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011603041] [2023-11-29 02:56:11,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:11,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:11,499 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:56:11,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1571156892] [2023-11-29 02:56:11,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:11,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:11,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:11,501 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:11,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:56:11,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:11,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 02:56:11,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 82 proven. 234 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-29 02:56:27,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:56:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-29 02:56:34,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:34,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011603041] [2023-11-29 02:56:34,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:56:34,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571156892] [2023-11-29 02:56:34,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571156892] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:56:34,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:56:34,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2023-11-29 02:56:34,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808773841] [2023-11-29 02:56:34,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:56:34,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:56:34,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:34,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:56:34,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:56:34,158 INFO L87 Difference]: Start difference. First operand 355 states and 479 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:56:35,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:35,525 INFO L93 Difference]: Finished difference Result 656 states and 860 transitions. [2023-11-29 02:56:35,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:56:35,526 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 249 [2023-11-29 02:56:35,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:35,528 INFO L225 Difference]: With dead ends: 656 [2023-11-29 02:56:35,528 INFO L226 Difference]: Without dead ends: 433 [2023-11-29 02:56:35,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=161, Invalid=595, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:56:35,530 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 174 mSDsluCounter, 310 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:35,530 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 458 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:56:35,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2023-11-29 02:56:35,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 355. [2023-11-29 02:56:35,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 231 states have (on average 1.1818181818181819) internal successors, (273), 233 states have internal predecessors, (273), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 02:56:35,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 479 transitions. [2023-11-29 02:56:35,576 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 479 transitions. Word has length 249 [2023-11-29 02:56:35,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:35,576 INFO L495 AbstractCegarLoop]: Abstraction has 355 states and 479 transitions. [2023-11-29 02:56:35,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 9 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:56:35,576 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 479 transitions. [2023-11-29 02:56:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-29 02:56:35,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:35,578 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:35,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:56:35,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:35,779 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:35,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:35,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1284321752, now seen corresponding path program 1 times [2023-11-29 02:56:35,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:35,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629091494] [2023-11-29 02:56:35,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:35,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:35,806 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:56:35,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [475628445] [2023-11-29 02:56:35,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:35,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:35,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:35,808 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:35,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:56:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:35,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:56:35,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 40 proven. 120 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-11-29 02:56:37,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:56:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2023-11-29 02:56:38,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:38,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629091494] [2023-11-29 02:56:38,052 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:56:38,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475628445] [2023-11-29 02:56:38,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475628445] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:56:38,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:56:38,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 02:56:38,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530891591] [2023-11-29 02:56:38,053 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:56:38,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 02:56:38,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:38,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 02:56:38,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:56:38,055 INFO L87 Difference]: Start difference. First operand 355 states and 479 transitions. Second operand has 18 states, 17 states have (on average 5.176470588235294) internal successors, (88), 18 states have internal predecessors, (88), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) [2023-11-29 02:56:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:39,569 INFO L93 Difference]: Finished difference Result 655 states and 863 transitions. [2023-11-29 02:56:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:56:39,570 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.176470588235294) internal successors, (88), 18 states have internal predecessors, (88), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) Word has length 249 [2023-11-29 02:56:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:39,573 INFO L225 Difference]: With dead ends: 655 [2023-11-29 02:56:39,573 INFO L226 Difference]: Without dead ends: 413 [2023-11-29 02:56:39,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 482 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2023-11-29 02:56:39,574 INFO L413 NwaCegarLoop]: 104 mSDtfsCounter, 470 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 1486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:39,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 755 Invalid, 1486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 1212 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 02:56:39,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2023-11-29 02:56:39,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 356. [2023-11-29 02:56:39,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 232 states have (on average 1.168103448275862) internal successors, (271), 234 states have internal predecessors, (271), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 02:56:39,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 477 transitions. [2023-11-29 02:56:39,637 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 477 transitions. Word has length 249 [2023-11-29 02:56:39,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:39,638 INFO L495 AbstractCegarLoop]: Abstraction has 356 states and 477 transitions. [2023-11-29 02:56:39,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.176470588235294) internal successors, (88), 18 states have internal predecessors, (88), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) [2023-11-29 02:56:39,638 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 477 transitions. [2023-11-29 02:56:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-29 02:56:39,639 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:39,639 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:39,645 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:56:39,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:39,840 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:39,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:39,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1241702845, now seen corresponding path program 1 times [2023-11-29 02:56:39,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:39,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612037336] [2023-11-29 02:56:39,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:39,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:39,863 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:56:39,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856626744] [2023-11-29 02:56:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:39,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:39,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:39,865 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:39,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:56:39,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:39,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:56:39,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:40,001 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-29 02:56:40,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:56:40,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:40,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612037336] [2023-11-29 02:56:40,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:56:40,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856626744] [2023-11-29 02:56:40,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856626744] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:56:40,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:56:40,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:56:40,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089063679] [2023-11-29 02:56:40,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:56:40,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:56:40,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:40,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:56:40,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:56:40,004 INFO L87 Difference]: Start difference. First operand 356 states and 477 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:56:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:40,179 INFO L93 Difference]: Finished difference Result 583 states and 776 transitions. [2023-11-29 02:56:40,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:56:40,180 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 249 [2023-11-29 02:56:40,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:40,183 INFO L225 Difference]: With dead ends: 583 [2023-11-29 02:56:40,183 INFO L226 Difference]: Without dead ends: 400 [2023-11-29 02:56:40,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:56:40,185 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 53 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:40,185 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 415 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:56:40,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2023-11-29 02:56:40,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 352. [2023-11-29 02:56:40,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 228 states have (on average 1.162280701754386) internal successors, (265), 230 states have internal predecessors, (265), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 02:56:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 471 transitions. [2023-11-29 02:56:40,259 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 471 transitions. Word has length 249 [2023-11-29 02:56:40,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:40,259 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 471 transitions. [2023-11-29 02:56:40,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:56:40,260 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 471 transitions. [2023-11-29 02:56:40,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-29 02:56:40,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:40,262 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:40,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:56:40,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:40,463 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:40,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:40,463 INFO L85 PathProgramCache]: Analyzing trace with hash -1691988157, now seen corresponding path program 1 times [2023-11-29 02:56:40,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:40,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88236073] [2023-11-29 02:56:40,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:40,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:40,487 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:56:40,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277534505] [2023-11-29 02:56:40,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:40,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:40,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:40,489 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:40,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:56:40,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:40,645 INFO L262 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 02:56:40,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:43,647 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1102 proven. 318 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 02:56:43,647 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:56:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-29 02:56:49,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:56:49,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88236073] [2023-11-29 02:56:49,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:56:49,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277534505] [2023-11-29 02:56:49,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277534505] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:56:49,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:56:49,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-29 02:56:49,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377555244] [2023-11-29 02:56:49,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:56:49,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:56:49,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:56:49,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:56:49,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:56:49,777 INFO L87 Difference]: Start difference. First operand 352 states and 471 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:56:51,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:56:51,419 INFO L93 Difference]: Finished difference Result 570 states and 760 transitions. [2023-11-29 02:56:51,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:56:51,420 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 249 [2023-11-29 02:56:51,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:56:51,424 INFO L225 Difference]: With dead ends: 570 [2023-11-29 02:56:51,424 INFO L226 Difference]: Without dead ends: 391 [2023-11-29 02:56:51,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:56:51,426 INFO L413 NwaCegarLoop]: 145 mSDtfsCounter, 145 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:56:51,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 671 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:56:51,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-29 02:56:51,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 360. [2023-11-29 02:56:51,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 236 states have (on average 1.1652542372881356) internal successors, (275), 238 states have internal predecessors, (275), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 02:56:51,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 481 transitions. [2023-11-29 02:56:51,521 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 481 transitions. Word has length 249 [2023-11-29 02:56:51,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:56:51,522 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 481 transitions. [2023-11-29 02:56:51,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:56:51,522 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 481 transitions. [2023-11-29 02:56:51,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2023-11-29 02:56:51,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:56:51,524 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:56:51,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 02:56:51,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:51,725 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:56:51,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:56:51,726 INFO L85 PathProgramCache]: Analyzing trace with hash -990923579, now seen corresponding path program 1 times [2023-11-29 02:56:51,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:56:51,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800032404] [2023-11-29 02:56:51,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:51,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:56:51,751 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:56:51,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [566845938] [2023-11-29 02:56:51,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:56:51,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:56:51,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:56:51,752 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:56:51,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:56:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:56:51,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 02:56:51,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:56:54,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1102 proven. 318 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2023-11-29 02:56:54,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:57:00,858 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-29 02:57:00,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:57:00,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800032404] [2023-11-29 02:57:00,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:57:00,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566845938] [2023-11-29 02:57:00,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566845938] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:57:00,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:57:00,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-29 02:57:00,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029580040] [2023-11-29 02:57:00,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:57:00,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:57:00,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:57:00,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:57:00,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:57:00,861 INFO L87 Difference]: Start difference. First operand 360 states and 481 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:57:02,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:57:02,350 INFO L93 Difference]: Finished difference Result 578 states and 769 transitions. [2023-11-29 02:57:02,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:57:02,350 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 249 [2023-11-29 02:57:02,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:57:02,353 INFO L225 Difference]: With dead ends: 578 [2023-11-29 02:57:02,353 INFO L226 Difference]: Without dead ends: 391 [2023-11-29 02:57:02,355 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 472 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:57:02,355 INFO L413 NwaCegarLoop]: 142 mSDtfsCounter, 213 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 548 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:57:02,355 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 548 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:57:02,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2023-11-29 02:57:02,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 360. [2023-11-29 02:57:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 236 states have (on average 1.1652542372881356) internal successors, (275), 238 states have internal predecessors, (275), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 02:57:02,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 481 transitions. [2023-11-29 02:57:02,455 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 481 transitions. Word has length 249 [2023-11-29 02:57:02,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:57:02,456 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 481 transitions. [2023-11-29 02:57:02,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 10 states have internal predecessors, (47), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:57:02,456 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 481 transitions. [2023-11-29 02:57:02,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-11-29 02:57:02,458 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:57:02,458 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:02,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:57:02,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 02:57:02,659 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:02,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:02,659 INFO L85 PathProgramCache]: Analyzing trace with hash -599918945, now seen corresponding path program 1 times [2023-11-29 02:57:02,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:02,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910782346] [2023-11-29 02:57:02,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:02,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:02,683 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:57:02,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [194399755] [2023-11-29 02:57:02,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:02,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:02,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:57:02,685 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:57:02,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:57:02,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:02,838 INFO L262 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:57:02,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:57:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 40 proven. 120 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-11-29 02:57:11,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:57:17,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-29 02:57:17,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:57:17,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910782346] [2023-11-29 02:57:17,462 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:57:17,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194399755] [2023-11-29 02:57:17,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [194399755] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:57:17,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:57:17,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [13] total 20 [2023-11-29 02:57:17,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3147374] [2023-11-29 02:57:17,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:57:17,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:57:17,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:57:17,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:57:17,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:57:17,464 INFO L87 Difference]: Start difference. First operand 360 states and 481 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:57:18,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:57:18,665 INFO L93 Difference]: Finished difference Result 610 states and 804 transitions. [2023-11-29 02:57:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:57:18,666 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 250 [2023-11-29 02:57:18,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:57:18,669 INFO L225 Difference]: With dead ends: 610 [2023-11-29 02:57:18,669 INFO L226 Difference]: Without dead ends: 423 [2023-11-29 02:57:18,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=236, Invalid=634, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:57:18,670 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 177 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:57:18,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 594 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:57:18,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-11-29 02:57:18,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 366. [2023-11-29 02:57:18,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 242 states have (on average 1.165289256198347) internal successors, (282), 244 states have internal predecessors, (282), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 02:57:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 488 transitions. [2023-11-29 02:57:18,734 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 488 transitions. Word has length 250 [2023-11-29 02:57:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:57:18,735 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 488 transitions. [2023-11-29 02:57:18,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:57:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 488 transitions. [2023-11-29 02:57:18,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-11-29 02:57:18,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:57:18,737 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:18,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:57:18,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 02:57:18,938 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:18,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:18,938 INFO L85 PathProgramCache]: Analyzing trace with hash -341753507, now seen corresponding path program 1 times [2023-11-29 02:57:18,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:18,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753306253] [2023-11-29 02:57:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:18,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:18,959 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:57:18,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025850434] [2023-11-29 02:57:18,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:18,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:18,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:57:18,960 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:57:18,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:57:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:19,081 INFO L262 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 02:57:19,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:57:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 82 proven. 234 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-29 02:57:28,956 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:57:34,364 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-29 02:57:34,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:57:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753306253] [2023-11-29 02:57:34,365 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:57:34,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025850434] [2023-11-29 02:57:34,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025850434] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:57:34,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:57:34,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-29 02:57:34,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539515430] [2023-11-29 02:57:34,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:57:34,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:57:34,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:57:34,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:57:34,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:57:34,367 INFO L87 Difference]: Start difference. First operand 366 states and 488 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:57:35,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:57:35,798 INFO L93 Difference]: Finished difference Result 616 states and 810 transitions. [2023-11-29 02:57:35,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:57:35,798 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 250 [2023-11-29 02:57:35,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:57:35,801 INFO L225 Difference]: With dead ends: 616 [2023-11-29 02:57:35,801 INFO L226 Difference]: Without dead ends: 423 [2023-11-29 02:57:35,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 477 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 02:57:35,802 INFO L413 NwaCegarLoop]: 165 mSDtfsCounter, 161 mSDsluCounter, 677 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 842 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:57:35,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 842 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:57:35,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-11-29 02:57:35,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 363. [2023-11-29 02:57:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 239 states have (on average 1.1631799163179917) internal successors, (278), 241 states have internal predecessors, (278), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 02:57:35,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 484 transitions. [2023-11-29 02:57:35,887 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 484 transitions. Word has length 250 [2023-11-29 02:57:35,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:57:35,888 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 484 transitions. [2023-11-29 02:57:35,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:57:35,888 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 484 transitions. [2023-11-29 02:57:35,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-11-29 02:57:35,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:57:35,890 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:57:35,894 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:57:36,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:57:36,090 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:57:36,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:57:36,091 INFO L85 PathProgramCache]: Analyzing trace with hash -222656867, now seen corresponding path program 1 times [2023-11-29 02:57:36,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:57:36,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552199828] [2023-11-29 02:57:36,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:36,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:57:36,108 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:57:36,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220139823] [2023-11-29 02:57:36,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:57:36,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:57:36,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:57:36,109 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:57:36,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:57:36,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:57:36,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 569 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 02:57:36,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:58:04,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1290 proven. 723 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2023-11-29 02:58:04,449 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:58:13,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-29 02:58:13,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:13,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552199828] [2023-11-29 02:58:13,722 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:58:13,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220139823] [2023-11-29 02:58:13,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220139823] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:58:13,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:58:13,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [38] total 46 [2023-11-29 02:58:13,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104923872] [2023-11-29 02:58:13,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:58:13,724 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:58:13,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:13,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:58:13,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=431, Invalid=1639, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 02:58:13,725 INFO L87 Difference]: Start difference. First operand 363 states and 484 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:58:14,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:58:14,415 INFO L93 Difference]: Finished difference Result 681 states and 886 transitions. [2023-11-29 02:58:14,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:58:14,416 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 250 [2023-11-29 02:58:14,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:58:14,418 INFO L225 Difference]: With dead ends: 681 [2023-11-29 02:58:14,418 INFO L226 Difference]: Without dead ends: 451 [2023-11-29 02:58:14,420 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 454 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=471, Invalid=1979, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 02:58:14,420 INFO L413 NwaCegarLoop]: 133 mSDtfsCounter, 154 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:58:14,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 527 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:58:14,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2023-11-29 02:58:14,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 366. [2023-11-29 02:58:14,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 366 states, 242 states have (on average 1.1735537190082646) internal successors, (284), 244 states have internal predecessors, (284), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 02:58:14,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 366 states to 366 states and 490 transitions. [2023-11-29 02:58:14,497 INFO L78 Accepts]: Start accepts. Automaton has 366 states and 490 transitions. Word has length 250 [2023-11-29 02:58:14,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:58:14,497 INFO L495 AbstractCegarLoop]: Abstraction has 366 states and 490 transitions. [2023-11-29 02:58:14,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:58:14,497 INFO L276 IsEmpty]: Start isEmpty. Operand 366 states and 490 transitions. [2023-11-29 02:58:14,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-11-29 02:58:14,499 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:58:14,499 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:14,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:58:14,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:58:14,700 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:58:14,700 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:14,700 INFO L85 PathProgramCache]: Analyzing trace with hash 421149409, now seen corresponding path program 1 times [2023-11-29 02:58:14,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:14,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697722873] [2023-11-29 02:58:14,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:14,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:14,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:58:14,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1186199365] [2023-11-29 02:58:14,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:14,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:58:14,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:58:14,718 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:58:14,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:58:14,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:14,853 INFO L262 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:58:14,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:58:15,508 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 40 proven. 120 refuted. 0 times theorem prover too weak. 3120 trivial. 0 not checked. [2023-11-29 02:58:15,508 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:58:15,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 3160 trivial. 0 not checked. [2023-11-29 02:58:15,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:15,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697722873] [2023-11-29 02:58:15,803 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:58:15,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186199365] [2023-11-29 02:58:15,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186199365] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:58:15,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:58:15,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-29 02:58:15,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150368783] [2023-11-29 02:58:15,803 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:58:15,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:58:15,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:15,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:58:15,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:58:15,806 INFO L87 Difference]: Start difference. First operand 366 states and 490 transitions. Second operand has 15 states, 14 states have (on average 6.214285714285714) internal successors, (87), 15 states have internal predecessors, (87), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) [2023-11-29 02:58:16,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:58:16,894 INFO L93 Difference]: Finished difference Result 696 states and 903 transitions. [2023-11-29 02:58:16,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:58:16,895 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.214285714285714) internal successors, (87), 15 states have internal predecessors, (87), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) Word has length 250 [2023-11-29 02:58:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:58:16,897 INFO L225 Difference]: With dead ends: 696 [2023-11-29 02:58:16,897 INFO L226 Difference]: Without dead ends: 454 [2023-11-29 02:58:16,898 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 487 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:58:16,899 INFO L413 NwaCegarLoop]: 111 mSDtfsCounter, 369 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 410 SdHoareTripleChecker+Valid, 749 SdHoareTripleChecker+Invalid, 1296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:58:16,899 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [410 Valid, 749 Invalid, 1296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:58:16,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2023-11-29 02:58:16,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 360. [2023-11-29 02:58:16,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 236 states have (on average 1.1694915254237288) internal successors, (276), 238 states have internal predecessors, (276), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 02:58:16,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 482 transitions. [2023-11-29 02:58:16,978 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 482 transitions. Word has length 250 [2023-11-29 02:58:16,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:58:16,978 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 482 transitions. [2023-11-29 02:58:16,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.214285714285714) internal successors, (87), 15 states have internal predecessors, (87), 4 states have call successors, (82), 3 states have call predecessors, (82), 4 states have return successors, (82), 2 states have call predecessors, (82), 4 states have call successors, (82) [2023-11-29 02:58:16,979 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 482 transitions. [2023-11-29 02:58:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-11-29 02:58:16,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:58:16,981 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:16,988 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:58:17,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:58:17,188 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:58:17,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:17,189 INFO L85 PathProgramCache]: Analyzing trace with hash 35508571, now seen corresponding path program 1 times [2023-11-29 02:58:17,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:17,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212797236] [2023-11-29 02:58:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:17,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:17,212 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:58:17,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [46339382] [2023-11-29 02:58:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:17,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:58:17,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:58:17,213 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:58:17,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:58:17,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:17,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 566 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 02:58:17,388 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:58:31,784 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 82 proven. 234 refuted. 0 times theorem prover too weak. 2964 trivial. 0 not checked. [2023-11-29 02:58:31,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:58:38,841 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-29 02:58:38,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:58:38,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212797236] [2023-11-29 02:58:38,841 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:58:38,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46339382] [2023-11-29 02:58:38,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46339382] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:58:38,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:58:38,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 25 [2023-11-29 02:58:38,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390177828] [2023-11-29 02:58:38,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:58:38,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:58:38,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:58:38,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:58:38,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:58:38,844 INFO L87 Difference]: Start difference. First operand 360 states and 482 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:58:39,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:58:39,734 INFO L93 Difference]: Finished difference Result 654 states and 855 transitions. [2023-11-29 02:58:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:58:39,735 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 250 [2023-11-29 02:58:39,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:58:39,737 INFO L225 Difference]: With dead ends: 654 [2023-11-29 02:58:39,737 INFO L226 Difference]: Without dead ends: 422 [2023-11-29 02:58:39,739 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 475 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:58:39,739 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 134 mSDsluCounter, 500 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:58:39,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [134 Valid, 637 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:58:39,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2023-11-29 02:58:39,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 348. [2023-11-29 02:58:39,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 224 states have (on average 1.1696428571428572) internal successors, (262), 226 states have internal predecessors, (262), 103 states have call successors, (103), 20 states have call predecessors, (103), 20 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 02:58:39,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 468 transitions. [2023-11-29 02:58:39,836 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 468 transitions. Word has length 250 [2023-11-29 02:58:39,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:58:39,837 INFO L495 AbstractCegarLoop]: Abstraction has 348 states and 468 transitions. [2023-11-29 02:58:39,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 02:58:39,837 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 468 transitions. [2023-11-29 02:58:39,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2023-11-29 02:58:39,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:58:39,838 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:58:39,843 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:58:40,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:58:40,039 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:58:40,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:58:40,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1276499912, now seen corresponding path program 1 times [2023-11-29 02:58:40,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:58:40,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361979976] [2023-11-29 02:58:40,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:40,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:58:40,062 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:58:40,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [856777539] [2023-11-29 02:58:40,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:58:40,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:58:40,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:58:40,063 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:58:40,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:58:40,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:58:40,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:58:40,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:01:05,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3280 trivial. 0 not checked. [2023-11-29 03:01:05,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 03:01:05,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 03:01:05,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361979976] [2023-11-29 03:01:05,798 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 03:01:05,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856777539] [2023-11-29 03:01:05,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856777539] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 03:01:05,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 03:01:05,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 03:01:05,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766969467] [2023-11-29 03:01:05,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 03:01:05,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 03:01:05,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 03:01:05,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 03:01:05,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 03:01:05,800 INFO L87 Difference]: Start difference. First operand 348 states and 468 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 03:01:06,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 03:01:06,105 INFO L93 Difference]: Finished difference Result 397 states and 519 transitions. [2023-11-29 03:01:06,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 03:01:06,106 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) Word has length 251 [2023-11-29 03:01:06,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 03:01:06,108 INFO L225 Difference]: With dead ends: 397 [2023-11-29 03:01:06,108 INFO L226 Difference]: Without dead ends: 395 [2023-11-29 03:01:06,109 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-29 03:01:06,109 INFO L413 NwaCegarLoop]: 176 mSDtfsCounter, 98 mSDsluCounter, 495 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 671 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 03:01:06,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 671 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 03:01:06,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2023-11-29 03:01:06,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 362. [2023-11-29 03:01:06,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 235 states have (on average 1.1617021276595745) internal successors, (273), 237 states have internal predecessors, (273), 103 states have call successors, (103), 23 states have call predecessors, (103), 23 states have return successors, (103), 101 states have call predecessors, (103), 103 states have call successors, (103) [2023-11-29 03:01:06,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 479 transitions. [2023-11-29 03:01:06,182 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 479 transitions. Word has length 251 [2023-11-29 03:01:06,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 03:01:06,183 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 479 transitions. [2023-11-29 03:01:06,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 9 states have internal predecessors, (49), 1 states have call successors, (41), 1 states have call predecessors, (41), 1 states have return successors, (41), 1 states have call predecessors, (41), 1 states have call successors, (41) [2023-11-29 03:01:06,183 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 479 transitions. [2023-11-29 03:01:06,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-29 03:01:06,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 03:01:06,184 INFO L195 NwaCegarLoop]: trace histogram [41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 03:01:06,189 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 03:01:06,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 03:01:06,385 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 03:01:06,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 03:01:06,386 INFO L85 PathProgramCache]: Analyzing trace with hash 612305533, now seen corresponding path program 1 times [2023-11-29 03:01:06,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 03:01:06,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398360345] [2023-11-29 03:01:06,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:01:06,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 03:01:06,409 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 03:01:06,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2060872896] [2023-11-29 03:01:06,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 03:01:06,410 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 03:01:06,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 03:01:06,411 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 03:01:06,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1b75791f-0cb7-4cd8-9fb4-509cdd2e4a3c/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 03:01:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 03:01:06,562 INFO L262 TraceCheckSpWp]: Trace formula consists of 577 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 03:01:06,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 03:02:43,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3280 backedges. 1019 proven. 210 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2023-11-29 03:02:43,097 INFO L327 TraceCheckSpWp]: Computing backward predicates...