./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-96.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/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_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-96.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/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_810ef7be-4e67-4ece-9aa6-5b2763e982ab/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 04a66e3f5e0c01de9542e5e7b3340b25c89da9661ce4bdf3a3b49f3763c62dc2 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:48:59,329 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:48:59,399 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:48:59,406 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:48:59,406 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:48:59,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:48:59,433 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:48:59,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:48:59,434 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:48:59,434 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:48:59,435 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:48:59,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:48:59,436 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:48:59,437 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:48:59,437 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:48:59,438 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:48:59,438 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:48:59,439 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:48:59,439 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:48:59,440 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:48:59,441 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:48:59,441 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:48:59,442 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:48:59,442 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:48:59,443 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:48:59,443 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:48:59,443 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:48:59,444 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:48:59,444 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:48:59,445 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:48:59,445 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:48:59,446 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:48:59,446 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:48:59,446 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:48:59,446 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:48:59,447 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:48:59,447 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:48:59,447 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:48:59,447 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:48:59,447 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:48:59,448 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:48:59,448 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:48:59,448 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_810ef7be-4e67-4ece-9aa6-5b2763e982ab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 04a66e3f5e0c01de9542e5e7b3340b25c89da9661ce4bdf3a3b49f3763c62dc2 [2023-11-29 01:48:59,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:48:59,707 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:48:59,709 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:48:59,711 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:48:59,711 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:48:59,712 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-96.i [2023-11-29 01:49:02,513 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:49:02,785 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:49:02,786 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-96.i [2023-11-29 01:49:02,804 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/data/5da527b27/f3d9ed8f5ec7478fb040da9eadb8108d/FLAG17c1463bb [2023-11-29 01:49:02,818 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/data/5da527b27/f3d9ed8f5ec7478fb040da9eadb8108d [2023-11-29 01:49:02,821 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:49:02,822 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:49:02,823 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:49:02,823 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:49:02,828 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:49:02,829 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:49:02" (1/1) ... [2023-11-29 01:49:02,830 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@240f3f8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:02, skipping insertion in model container [2023-11-29 01:49:02,830 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:49:02" (1/1) ... [2023-11-29 01:49:02,879 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:49:03,009 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_810ef7be-4e67-4ece-9aa6-5b2763e982ab/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-96.i[916,929] [2023-11-29 01:49:03,185 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:49:03,204 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:49:03,217 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_810ef7be-4e67-4ece-9aa6-5b2763e982ab/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-96.i[916,929] [2023-11-29 01:49:03,313 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:49:03,335 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:49:03,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03 WrapperNode [2023-11-29 01:49:03,335 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:49:03,336 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:49:03,336 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:49:03,336 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:49:03,342 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03" (1/1) ... [2023-11-29 01:49:03,368 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03" (1/1) ... [2023-11-29 01:49:03,451 INFO L138 Inliner]: procedures = 26, calls = 132, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 906 [2023-11-29 01:49:03,451 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:49:03,452 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:49:03,452 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:49:03,452 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:49:03,462 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03" (1/1) ... [2023-11-29 01:49:03,463 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03" (1/1) ... [2023-11-29 01:49:03,481 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03" (1/1) ... [2023-11-29 01:49:03,520 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 01:49:03,520 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03" (1/1) ... [2023-11-29 01:49:03,520 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03" (1/1) ... [2023-11-29 01:49:03,549 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03" (1/1) ... [2023-11-29 01:49:03,557 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03" (1/1) ... [2023-11-29 01:49:03,574 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03" (1/1) ... [2023-11-29 01:49:03,580 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03" (1/1) ... [2023-11-29 01:49:03,598 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:49:03,599 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:49:03,599 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:49:03,599 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:49:03,600 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03" (1/1) ... [2023-11-29 01:49:03,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:49:03,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:03,630 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:49:03,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:49:03,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:49:03,671 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 01:49:03,672 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 01:49:03,672 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:49:03,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:49:03,673 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:49:03,827 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:49:03,829 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:49:04,951 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:49:05,017 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:49:05,018 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 01:49:05,018 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:49:05 BoogieIcfgContainer [2023-11-29 01:49:05,019 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:49:05,021 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:49:05,022 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:49:05,025 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:49:05,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:49:02" (1/3) ... [2023-11-29 01:49:05,026 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f73547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:49:05, skipping insertion in model container [2023-11-29 01:49:05,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:49:03" (2/3) ... [2023-11-29 01:49:05,027 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76f73547 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:49:05, skipping insertion in model container [2023-11-29 01:49:05,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:49:05" (3/3) ... [2023-11-29 01:49:05,028 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-96.i [2023-11-29 01:49:05,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:49:05,048 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:49:05,111 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:49:05,118 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;@6f1977f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:49:05,118 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:49:05,125 INFO L276 IsEmpty]: Start isEmpty. Operand has 351 states, 229 states have (on average 1.6550218340611353) internal successors, (379), 230 states have internal predecessors, (379), 119 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 119 states have call predecessors, (119), 119 states have call successors, (119) [2023-11-29 01:49:05,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2023-11-29 01:49:05,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:05,175 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:05,176 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:05,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:05,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1345669083, now seen corresponding path program 1 times [2023-11-29 01:49:05,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:05,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991131853] [2023-11-29 01:49:05,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:05,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:05,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:05,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:05,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991131853] [2023-11-29 01:49:05,575 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 01:49:05,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040803206] [2023-11-29 01:49:05,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:05,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:05,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:05,579 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:05,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:49:06,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:06,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 01:49:06,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:06,280 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 27848 trivial. 0 not checked. [2023-11-29 01:49:06,280 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:06,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040803206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:06,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:06,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:49:06,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613588653] [2023-11-29 01:49:06,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:06,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 01:49:06,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:06,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 01:49:06,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:49:06,327 INFO L87 Difference]: Start difference. First operand has 351 states, 229 states have (on average 1.6550218340611353) internal successors, (379), 230 states have internal predecessors, (379), 119 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 119 states have call predecessors, (119), 119 states have call successors, (119) Second operand has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 2 states have call successors, (119), 2 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 2 states have call successors, (119) [2023-11-29 01:49:06,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:06,418 INFO L93 Difference]: Finished difference Result 695 states and 1343 transitions. [2023-11-29 01:49:06,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 01:49:06,421 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 2 states have call successors, (119), 2 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 2 states have call successors, (119) Word has length 751 [2023-11-29 01:49:06,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:06,435 INFO L225 Difference]: With dead ends: 695 [2023-11-29 01:49:06,435 INFO L226 Difference]: Without dead ends: 345 [2023-11-29 01:49:06,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 750 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 01:49:06,447 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:06,448 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 592 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:49:06,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2023-11-29 01:49:06,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2023-11-29 01:49:06,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 224 states have (on average 1.59375) internal successors, (357), 224 states have internal predecessors, (357), 119 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 119 states have call predecessors, (119), 119 states have call successors, (119) [2023-11-29 01:49:06,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 595 transitions. [2023-11-29 01:49:06,575 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 595 transitions. Word has length 751 [2023-11-29 01:49:06,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:06,576 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 595 transitions. [2023-11-29 01:49:06,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 80.5) internal successors, (161), 2 states have internal predecessors, (161), 2 states have call successors, (119), 2 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 2 states have call successors, (119) [2023-11-29 01:49:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 595 transitions. [2023-11-29 01:49:06,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2023-11-29 01:49:06,612 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:06,612 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:06,622 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:49:06,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 01:49:06,814 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:06,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:06,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1931246043, now seen corresponding path program 1 times [2023-11-29 01:49:06,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:06,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645945491] [2023-11-29 01:49:06,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:06,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:06,985 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:06,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2058570259] [2023-11-29 01:49:06,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:06,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:06,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:06,988 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:06,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:49:07,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:07,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:49:07,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:07,652 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:49:07,652 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:07,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:07,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645945491] [2023-11-29 01:49:07,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:07,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058570259] [2023-11-29 01:49:07,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058570259] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:07,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:07,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:49:07,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182417272] [2023-11-29 01:49:07,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:07,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:07,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:07,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:07,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:07,659 INFO L87 Difference]: Start difference. First operand 345 states and 595 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:07,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:07,798 INFO L93 Difference]: Finished difference Result 901 states and 1559 transitions. [2023-11-29 01:49:07,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:07,799 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 751 [2023-11-29 01:49:07,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:07,808 INFO L225 Difference]: With dead ends: 901 [2023-11-29 01:49:07,808 INFO L226 Difference]: Without dead ends: 557 [2023-11-29 01:49:07,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 749 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 01:49:07,811 INFO L413 NwaCegarLoop]: 679 mSDtfsCounter, 336 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1243 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:07,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 1243 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:49:07,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2023-11-29 01:49:07,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 554. [2023-11-29 01:49:07,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 379 states have (on average 1.6279683377308707) internal successors, (617), 380 states have internal predecessors, (617), 172 states have call successors, (172), 2 states have call predecessors, (172), 2 states have return successors, (172), 171 states have call predecessors, (172), 172 states have call successors, (172) [2023-11-29 01:49:07,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 961 transitions. [2023-11-29 01:49:07,891 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 961 transitions. Word has length 751 [2023-11-29 01:49:07,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:07,894 INFO L495 AbstractCegarLoop]: Abstraction has 554 states and 961 transitions. [2023-11-29 01:49:07,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:07,894 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 961 transitions. [2023-11-29 01:49:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2023-11-29 01:49:07,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:07,902 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:07,910 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 01:49:08,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:08,103 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:08,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:08,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1691006297, now seen corresponding path program 1 times [2023-11-29 01:49:08,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:08,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160959563] [2023-11-29 01:49:08,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:08,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:08,207 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:08,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1066246763] [2023-11-29 01:49:08,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:08,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:08,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:08,210 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:08,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:49:08,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:08,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 1668 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:49:08,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:08,766 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:49:08,767 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:08,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:08,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160959563] [2023-11-29 01:49:08,767 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:08,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066246763] [2023-11-29 01:49:08,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066246763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:08,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:08,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:49:08,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835737580] [2023-11-29 01:49:08,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:08,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:08,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:08,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:08,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:08,772 INFO L87 Difference]: Start difference. First operand 554 states and 961 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:08,835 INFO L93 Difference]: Finished difference Result 1109 states and 1925 transitions. [2023-11-29 01:49:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:08,837 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 751 [2023-11-29 01:49:08,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:08,845 INFO L225 Difference]: With dead ends: 1109 [2023-11-29 01:49:08,845 INFO L226 Difference]: Without dead ends: 556 [2023-11-29 01:49:08,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 749 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 01:49:08,848 INFO L413 NwaCegarLoop]: 591 mSDtfsCounter, 0 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1178 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:08,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1178 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:49:08,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2023-11-29 01:49:08,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 556. [2023-11-29 01:49:08,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 381 states have (on average 1.6246719160104988) internal successors, (619), 382 states have internal predecessors, (619), 172 states have call successors, (172), 2 states have call predecessors, (172), 2 states have return successors, (172), 171 states have call predecessors, (172), 172 states have call successors, (172) [2023-11-29 01:49:08,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 963 transitions. [2023-11-29 01:49:08,916 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 963 transitions. Word has length 751 [2023-11-29 01:49:08,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:08,918 INFO L495 AbstractCegarLoop]: Abstraction has 556 states and 963 transitions. [2023-11-29 01:49:08,919 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:08,919 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 963 transitions. [2023-11-29 01:49:08,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2023-11-29 01:49:08,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:08,928 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:08,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 01:49:09,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:09,129 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:09,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:09,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1871993573, now seen corresponding path program 1 times [2023-11-29 01:49:09,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:09,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452520519] [2023-11-29 01:49:09,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:09,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:09,233 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:09,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1291398429] [2023-11-29 01:49:09,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:09,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:09,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:09,235 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:09,271 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:49:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:09,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:49:09,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:09,855 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:49:09,856 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:09,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:09,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452520519] [2023-11-29 01:49:09,856 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:09,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291398429] [2023-11-29 01:49:09,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291398429] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:09,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:09,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:49:09,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770042391] [2023-11-29 01:49:09,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:09,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:09,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:09,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:09,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:09,861 INFO L87 Difference]: Start difference. First operand 556 states and 963 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:09,970 INFO L93 Difference]: Finished difference Result 1499 states and 2609 transitions. [2023-11-29 01:49:09,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:09,971 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 751 [2023-11-29 01:49:09,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:09,978 INFO L225 Difference]: With dead ends: 1499 [2023-11-29 01:49:09,979 INFO L226 Difference]: Without dead ends: 944 [2023-11-29 01:49:09,980 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 749 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 01:49:09,981 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 293 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:09,982 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 1153 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:49:09,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2023-11-29 01:49:10,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 940. [2023-11-29 01:49:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 695 states have (on average 1.6546762589928057) internal successors, (1150), 698 states have internal predecessors, (1150), 240 states have call successors, (240), 4 states have call predecessors, (240), 4 states have return successors, (240), 237 states have call predecessors, (240), 240 states have call successors, (240) [2023-11-29 01:49:10,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 1630 transitions. [2023-11-29 01:49:10,074 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 1630 transitions. Word has length 751 [2023-11-29 01:49:10,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:10,076 INFO L495 AbstractCegarLoop]: Abstraction has 940 states and 1630 transitions. [2023-11-29 01:49:10,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:10,077 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 1630 transitions. [2023-11-29 01:49:10,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 752 [2023-11-29 01:49:10,092 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:10,092 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:10,101 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 01:49:10,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-29 01:49:10,295 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:10,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:10,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1069779937, now seen corresponding path program 1 times [2023-11-29 01:49:10,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:10,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674239100] [2023-11-29 01:49:10,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:10,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:10,410 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:10,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [39050550] [2023-11-29 01:49:10,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:10,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:10,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:10,412 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:10,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:49:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:10,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 1667 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:49:10,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:10,947 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:49:10,948 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:10,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:10,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674239100] [2023-11-29 01:49:10,948 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:10,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39050550] [2023-11-29 01:49:10,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39050550] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:10,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:10,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:49:10,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906185395] [2023-11-29 01:49:10,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:10,951 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:10,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:10,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:10,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:10,953 INFO L87 Difference]: Start difference. First operand 940 states and 1630 transitions. Second operand has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:11,057 INFO L93 Difference]: Finished difference Result 2621 states and 4548 transitions. [2023-11-29 01:49:11,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:11,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 751 [2023-11-29 01:49:11,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:11,069 INFO L225 Difference]: With dead ends: 2621 [2023-11-29 01:49:11,069 INFO L226 Difference]: Without dead ends: 1682 [2023-11-29 01:49:11,072 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 750 GetRequests, 749 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 01:49:11,073 INFO L413 NwaCegarLoop]: 852 mSDtfsCounter, 342 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1413 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:11,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 1413 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:49:11,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1682 states. [2023-11-29 01:49:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1682 to 1678. [2023-11-29 01:49:11,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1678 states, 1263 states have (on average 1.6595407759303247) internal successors, (2096), 1270 states have internal predecessors, (2096), 406 states have call successors, (406), 8 states have call predecessors, (406), 8 states have return successors, (406), 399 states have call predecessors, (406), 406 states have call successors, (406) [2023-11-29 01:49:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1678 states to 1678 states and 2908 transitions. [2023-11-29 01:49:11,191 INFO L78 Accepts]: Start accepts. Automaton has 1678 states and 2908 transitions. Word has length 751 [2023-11-29 01:49:11,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:11,192 INFO L495 AbstractCegarLoop]: Abstraction has 1678 states and 2908 transitions. [2023-11-29 01:49:11,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.0) internal successors, (159), 3 states have internal predecessors, (159), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:11,193 INFO L276 IsEmpty]: Start isEmpty. Operand 1678 states and 2908 transitions. [2023-11-29 01:49:11,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2023-11-29 01:49:11,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:11,201 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:11,208 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:49:11,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:11,402 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:11,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:11,402 INFO L85 PathProgramCache]: Analyzing trace with hash -163864853, now seen corresponding path program 1 times [2023-11-29 01:49:11,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:11,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687225285] [2023-11-29 01:49:11,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:11,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:11,494 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:11,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530931111] [2023-11-29 01:49:11,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:11,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:11,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:11,495 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:11,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:49:11,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:11,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 1666 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:49:11,964 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:12,097 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:49:12,097 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:12,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:12,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687225285] [2023-11-29 01:49:12,097 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:12,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530931111] [2023-11-29 01:49:12,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530931111] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:12,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:12,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:49:12,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76185437] [2023-11-29 01:49:12,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:12,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:12,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:12,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:12,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:12,102 INFO L87 Difference]: Start difference. First operand 1678 states and 2908 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:12,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:12,307 INFO L93 Difference]: Finished difference Result 4795 states and 8312 transitions. [2023-11-29 01:49:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:12,308 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 752 [2023-11-29 01:49:12,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:12,333 INFO L225 Difference]: With dead ends: 4795 [2023-11-29 01:49:12,333 INFO L226 Difference]: Without dead ends: 3118 [2023-11-29 01:49:12,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 750 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 01:49:12,341 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 301 mSDsluCounter, 570 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 1153 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:12,341 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [301 Valid, 1153 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:49:12,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3118 states. [2023-11-29 01:49:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3118 to 3112. [2023-11-29 01:49:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3112 states, 2365 states have (on average 1.6583509513742072) internal successors, (3922), 2380 states have internal predecessors, (3922), 730 states have call successors, (730), 16 states have call predecessors, (730), 16 states have return successors, (730), 715 states have call predecessors, (730), 730 states have call successors, (730) [2023-11-29 01:49:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3112 states to 3112 states and 5382 transitions. [2023-11-29 01:49:12,623 INFO L78 Accepts]: Start accepts. Automaton has 3112 states and 5382 transitions. Word has length 752 [2023-11-29 01:49:12,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:12,624 INFO L495 AbstractCegarLoop]: Abstraction has 3112 states and 5382 transitions. [2023-11-29 01:49:12,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3112 states and 5382 transitions. [2023-11-29 01:49:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2023-11-29 01:49:12,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:12,638 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:12,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 01:49:12,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:12,838 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:12,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:12,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1852808595, now seen corresponding path program 1 times [2023-11-29 01:49:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:12,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235511717] [2023-11-29 01:49:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:12,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:12,932 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:12,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [926431222] [2023-11-29 01:49:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:12,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:12,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:12,934 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:12,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:49:13,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:13,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:49:13,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:13,428 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:49:13,428 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:13,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:13,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235511717] [2023-11-29 01:49:13,428 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:13,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926431222] [2023-11-29 01:49:13,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926431222] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:13,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:13,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:49:13,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543777130] [2023-11-29 01:49:13,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:13,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:13,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:13,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:13,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:13,432 INFO L87 Difference]: Start difference. First operand 3112 states and 5382 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:13,685 INFO L93 Difference]: Finished difference Result 9302 states and 16080 transitions. [2023-11-29 01:49:13,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:13,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 752 [2023-11-29 01:49:13,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:13,722 INFO L225 Difference]: With dead ends: 9302 [2023-11-29 01:49:13,722 INFO L226 Difference]: Without dead ends: 6191 [2023-11-29 01:49:13,730 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 750 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 01:49:13,731 INFO L413 NwaCegarLoop]: 995 mSDtfsCounter, 564 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1569 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:13,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1569 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:49:13,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6191 states. [2023-11-29 01:49:14,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6191 to 6172. [2023-11-29 01:49:14,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6172 states, 4679 states have (on average 1.6347510151741824) internal successors, (7649), 4709 states have internal predecessors, (7649), 1460 states have call successors, (1460), 32 states have call predecessors, (1460), 32 states have return successors, (1460), 1430 states have call predecessors, (1460), 1460 states have call successors, (1460) [2023-11-29 01:49:14,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6172 states to 6172 states and 10569 transitions. [2023-11-29 01:49:14,226 INFO L78 Accepts]: Start accepts. Automaton has 6172 states and 10569 transitions. Word has length 752 [2023-11-29 01:49:14,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:14,227 INFO L495 AbstractCegarLoop]: Abstraction has 6172 states and 10569 transitions. [2023-11-29 01:49:14,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:14,228 INFO L276 IsEmpty]: Start isEmpty. Operand 6172 states and 10569 transitions. [2023-11-29 01:49:14,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2023-11-29 01:49:14,243 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:14,244 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:14,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 01:49:14,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:14,445 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:14,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:14,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1341500333, now seen corresponding path program 1 times [2023-11-29 01:49:14,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:14,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079170557] [2023-11-29 01:49:14,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:14,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:14,536 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:14,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [186184646] [2023-11-29 01:49:14,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:14,537 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:14,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:14,539 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:14,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:49:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:15,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:49:15,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:15,118 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:49:15,119 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:15,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:15,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079170557] [2023-11-29 01:49:15,119 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:15,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186184646] [2023-11-29 01:49:15,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186184646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:15,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:15,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:49:15,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656663686] [2023-11-29 01:49:15,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:15,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:49:15,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:15,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:49:15,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:49:15,123 INFO L87 Difference]: Start difference. First operand 6172 states and 10569 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:15,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:15,669 INFO L93 Difference]: Finished difference Result 18514 states and 31705 transitions. [2023-11-29 01:49:15,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:49:15,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 752 [2023-11-29 01:49:15,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:15,761 INFO L225 Difference]: With dead ends: 18514 [2023-11-29 01:49:15,761 INFO L226 Difference]: Without dead ends: 12343 [2023-11-29 01:49:15,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 750 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 01:49:15,785 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 568 mSDsluCounter, 585 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 568 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:15,786 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [568 Valid, 1189 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:49:15,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12343 states. [2023-11-29 01:49:17,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12343 to 12341. [2023-11-29 01:49:17,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12341 states, 9356 states have (on average 1.6246259085079093) internal successors, (15200), 9416 states have internal predecessors, (15200), 2920 states have call successors, (2920), 64 states have call predecessors, (2920), 64 states have return successors, (2920), 2860 states have call predecessors, (2920), 2920 states have call successors, (2920) [2023-11-29 01:49:17,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12341 states to 12341 states and 21040 transitions. [2023-11-29 01:49:17,157 INFO L78 Accepts]: Start accepts. Automaton has 12341 states and 21040 transitions. Word has length 752 [2023-11-29 01:49:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:17,159 INFO L495 AbstractCegarLoop]: Abstraction has 12341 states and 21040 transitions. [2023-11-29 01:49:17,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:17,160 INFO L276 IsEmpty]: Start isEmpty. Operand 12341 states and 21040 transitions. [2023-11-29 01:49:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2023-11-29 01:49:17,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:17,181 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:17,190 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:49:17,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:17,383 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:17,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:17,384 INFO L85 PathProgramCache]: Analyzing trace with hash 330383083, now seen corresponding path program 1 times [2023-11-29 01:49:17,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:17,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335376615] [2023-11-29 01:49:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:17,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:17,465 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:17,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538035986] [2023-11-29 01:49:17,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:17,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:17,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:17,467 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:17,471 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:49:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:17,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:49:17,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:18,026 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:49:18,027 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:18,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:18,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335376615] [2023-11-29 01:49:18,027 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:18,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538035986] [2023-11-29 01:49:18,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538035986] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:18,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:18,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:49:18,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974996722] [2023-11-29 01:49:18,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:18,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:49:18,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:18,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:49:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:49:18,031 INFO L87 Difference]: Start difference. First operand 12341 states and 21040 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:18,692 INFO L93 Difference]: Finished difference Result 24767 states and 42224 transitions. [2023-11-29 01:49:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:49:18,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 752 [2023-11-29 01:49:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:18,743 INFO L225 Difference]: With dead ends: 24767 [2023-11-29 01:49:18,744 INFO L226 Difference]: Without dead ends: 12427 [2023-11-29 01:49:18,782 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 749 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 01:49:18,783 INFO L413 NwaCegarLoop]: 722 mSDtfsCounter, 237 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 2004 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:18,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 2004 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:49:18,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12427 states. [2023-11-29 01:49:19,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12427 to 8917. [2023-11-29 01:49:19,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 7288 states have (on average 1.6701427003293086) internal successors, (12172), 7316 states have internal predecessors, (12172), 1592 states have call successors, (1592), 36 states have call predecessors, (1592), 36 states have return successors, (1592), 1564 states have call predecessors, (1592), 1592 states have call successors, (1592) [2023-11-29 01:49:19,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 15356 transitions. [2023-11-29 01:49:19,703 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 15356 transitions. Word has length 752 [2023-11-29 01:49:19,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:19,705 INFO L495 AbstractCegarLoop]: Abstraction has 8917 states and 15356 transitions. [2023-11-29 01:49:19,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 4 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:19,705 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 15356 transitions. [2023-11-29 01:49:19,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2023-11-29 01:49:19,757 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:19,758 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:19,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:49:19,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:19,968 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:19,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:19,968 INFO L85 PathProgramCache]: Analyzing trace with hash 55623469, now seen corresponding path program 1 times [2023-11-29 01:49:19,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:19,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787200130] [2023-11-29 01:49:19,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:19,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:20,068 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:20,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [803602318] [2023-11-29 01:49:20,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:20,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:20,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:20,070 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:20,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:49:20,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:20,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:49:20,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:21,412 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:49:21,412 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:21,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:21,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787200130] [2023-11-29 01:49:21,412 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:21,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803602318] [2023-11-29 01:49:21,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803602318] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:21,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:21,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:49:21,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28536334] [2023-11-29 01:49:21,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:21,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:49:21,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:21,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:49:21,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:49:21,417 INFO L87 Difference]: Start difference. First operand 8917 states and 15356 transitions. Second operand has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:22,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:22,303 INFO L93 Difference]: Finished difference Result 26813 states and 46194 transitions. [2023-11-29 01:49:22,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:49:22,304 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 752 [2023-11-29 01:49:22,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:22,363 INFO L225 Difference]: With dead ends: 26813 [2023-11-29 01:49:22,364 INFO L226 Difference]: Without dead ends: 17897 [2023-11-29 01:49:22,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 751 GetRequests, 749 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:49:22,389 INFO L413 NwaCegarLoop]: 589 mSDtfsCounter, 251 mSDsluCounter, 932 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 251 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:22,389 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [251 Valid, 1521 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:49:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17897 states. [2023-11-29 01:49:23,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17897 to 17831. [2023-11-29 01:49:23,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17831 states, 14574 states have (on average 1.6658432825579799) internal successors, (24278), 14630 states have internal predecessors, (24278), 3184 states have call successors, (3184), 72 states have call predecessors, (3184), 72 states have return successors, (3184), 3128 states have call predecessors, (3184), 3184 states have call successors, (3184) [2023-11-29 01:49:23,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17831 states to 17831 states and 30646 transitions. [2023-11-29 01:49:23,440 INFO L78 Accepts]: Start accepts. Automaton has 17831 states and 30646 transitions. Word has length 752 [2023-11-29 01:49:23,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:23,441 INFO L495 AbstractCegarLoop]: Abstraction has 17831 states and 30646 transitions. [2023-11-29 01:49:23,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.0) internal successors, (160), 3 states have internal predecessors, (160), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:23,442 INFO L276 IsEmpty]: Start isEmpty. Operand 17831 states and 30646 transitions. [2023-11-29 01:49:23,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 753 [2023-11-29 01:49:23,457 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:23,458 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:23,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 01:49:23,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:23,658 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:23,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:23,659 INFO L85 PathProgramCache]: Analyzing trace with hash 1442408879, now seen corresponding path program 1 times [2023-11-29 01:49:23,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:23,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792898577] [2023-11-29 01:49:23,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:23,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:23,720 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:23,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1969667147] [2023-11-29 01:49:23,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:23,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:23,720 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:23,721 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:23,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:49:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:24,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:49:24,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:24,804 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 13560 proven. 213 refuted. 0 times theorem prover too weak. 14311 trivial. 0 not checked. [2023-11-29 01:49:24,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 141 proven. 213 refuted. 0 times theorem prover too weak. 27730 trivial. 0 not checked. [2023-11-29 01:49:25,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:25,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792898577] [2023-11-29 01:49:25,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:25,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969667147] [2023-11-29 01:49:25,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969667147] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:25,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:49:25,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 01:49:25,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232861497] [2023-11-29 01:49:25,427 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:25,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:49:25,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:25,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:49:25,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:49:25,431 INFO L87 Difference]: Start difference. First operand 17831 states and 30646 transitions. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (190), 2 states have call predecessors, (190), 4 states have return successors, (191), 2 states have call predecessors, (191), 2 states have call successors, (191) [2023-11-29 01:49:26,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:26,830 INFO L93 Difference]: Finished difference Result 27725 states and 47568 transitions. [2023-11-29 01:49:26,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:49:26,831 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (190), 2 states have call predecessors, (190), 4 states have return successors, (191), 2 states have call predecessors, (191), 2 states have call successors, (191) Word has length 752 [2023-11-29 01:49:26,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:26,860 INFO L225 Difference]: With dead ends: 27725 [2023-11-29 01:49:26,860 INFO L226 Difference]: Without dead ends: 9895 [2023-11-29 01:49:26,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1506 GetRequests, 1496 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:49:26,889 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 913 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 960 SdHoareTripleChecker+Valid, 1247 SdHoareTripleChecker+Invalid, 1064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:26,889 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [960 Valid, 1247 Invalid, 1064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 01:49:26,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9895 states. [2023-11-29 01:49:27,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9895 to 9810. [2023-11-29 01:49:27,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9810 states, 7816 states have (on average 1.6345957011258956) internal successors, (12776), 7841 states have internal predecessors, (12776), 1935 states have call successors, (1935), 58 states have call predecessors, (1935), 58 states have return successors, (1935), 1910 states have call predecessors, (1935), 1935 states have call successors, (1935) [2023-11-29 01:49:27,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9810 states to 9810 states and 16646 transitions. [2023-11-29 01:49:27,800 INFO L78 Accepts]: Start accepts. Automaton has 9810 states and 16646 transitions. Word has length 752 [2023-11-29 01:49:27,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:27,801 INFO L495 AbstractCegarLoop]: Abstraction has 9810 states and 16646 transitions. [2023-11-29 01:49:27,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 2 states have call successors, (190), 2 states have call predecessors, (190), 4 states have return successors, (191), 2 states have call predecessors, (191), 2 states have call successors, (191) [2023-11-29 01:49:27,801 INFO L276 IsEmpty]: Start isEmpty. Operand 9810 states and 16646 transitions. [2023-11-29 01:49:27,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2023-11-29 01:49:27,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:27,815 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:27,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:49:28,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 01:49:28,016 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:28,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:28,016 INFO L85 PathProgramCache]: Analyzing trace with hash 1437289180, now seen corresponding path program 1 times [2023-11-29 01:49:28,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:28,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140159246] [2023-11-29 01:49:28,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:28,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:28,082 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:28,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1400458339] [2023-11-29 01:49:28,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:28,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:28,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:28,084 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:28,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:49:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:28,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 1664 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 01:49:28,501 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:49:28,593 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:49:28,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:28,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140159246] [2023-11-29 01:49:28,594 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:28,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400458339] [2023-11-29 01:49:28,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400458339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:49:28,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:49:28,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:49:28,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218660325] [2023-11-29 01:49:28,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:49:28,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:49:28,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:28,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:49:28,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:49:28,597 INFO L87 Difference]: Start difference. First operand 9810 states and 16646 transitions. Second operand has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:29,925 INFO L93 Difference]: Finished difference Result 35834 states and 60823 transitions. [2023-11-29 01:49:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:49:29,926 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 753 [2023-11-29 01:49:29,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:29,971 INFO L225 Difference]: With dead ends: 35834 [2023-11-29 01:49:29,971 INFO L226 Difference]: Without dead ends: 26104 [2023-11-29 01:49:29,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 751 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 01:49:29,991 INFO L413 NwaCegarLoop]: 1031 mSDtfsCounter, 803 mSDsluCounter, 1186 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 2217 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:29,991 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 2217 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:49:30,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26104 states. [2023-11-29 01:49:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26104 to 11475. [2023-11-29 01:49:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11475 states, 9473 states have (on average 1.6435131426158556) internal successors, (15569), 9498 states have internal predecessors, (15569), 1941 states have call successors, (1941), 60 states have call predecessors, (1941), 60 states have return successors, (1941), 1916 states have call predecessors, (1941), 1941 states have call successors, (1941) [2023-11-29 01:49:31,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11475 states to 11475 states and 19451 transitions. [2023-11-29 01:49:31,143 INFO L78 Accepts]: Start accepts. Automaton has 11475 states and 19451 transitions. Word has length 753 [2023-11-29 01:49:31,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:31,144 INFO L495 AbstractCegarLoop]: Abstraction has 11475 states and 19451 transitions. [2023-11-29 01:49:31,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.25) internal successors, (161), 4 states have internal predecessors, (161), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:49:31,145 INFO L276 IsEmpty]: Start isEmpty. Operand 11475 states and 19451 transitions. [2023-11-29 01:49:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 755 [2023-11-29 01:49:31,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:31,156 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:31,163 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:49:31,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:49:31,357 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:31,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:31,357 INFO L85 PathProgramCache]: Analyzing trace with hash 2094249757, now seen corresponding path program 1 times [2023-11-29 01:49:31,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:31,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014774995] [2023-11-29 01:49:31,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:31,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:31,432 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:31,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371520632] [2023-11-29 01:49:31,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:31,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:31,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:31,433 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:31,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:49:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:31,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 1663 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:49:31,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:33,117 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 18552 proven. 135 refuted. 0 times theorem prover too weak. 9397 trivial. 0 not checked. [2023-11-29 01:49:33,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:33,686 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 219 proven. 135 refuted. 0 times theorem prover too weak. 27730 trivial. 0 not checked. [2023-11-29 01:49:33,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:33,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014774995] [2023-11-29 01:49:33,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:33,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371520632] [2023-11-29 01:49:33,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371520632] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:33,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:49:33,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 01:49:33,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803473372] [2023-11-29 01:49:33,688 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:33,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:49:33,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:33,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:49:33,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:49:33,692 INFO L87 Difference]: Start difference. First operand 11475 states and 19451 transitions. Second operand has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 5 states have call successors, (194), 3 states have call predecessors, (194), 5 states have return successors, (194), 5 states have call predecessors, (194), 5 states have call successors, (194) [2023-11-29 01:49:35,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:35,114 INFO L93 Difference]: Finished difference Result 22969 states and 38864 transitions. [2023-11-29 01:49:35,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:49:35,115 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 5 states have call successors, (194), 3 states have call predecessors, (194), 5 states have return successors, (194), 5 states have call predecessors, (194), 5 states have call successors, (194) Word has length 754 [2023-11-29 01:49:35,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:35,140 INFO L225 Difference]: With dead ends: 22969 [2023-11-29 01:49:35,141 INFO L226 Difference]: Without dead ends: 11591 [2023-11-29 01:49:35,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1510 GetRequests, 1498 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2023-11-29 01:49:35,159 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 1139 mSDsluCounter, 651 mSDsCounter, 0 mSdLazyCounter, 630 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1212 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 987 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 630 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:35,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1212 Valid, 1097 Invalid, 987 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 630 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:49:35,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11591 states. [2023-11-29 01:49:36,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11591 to 11507. [2023-11-29 01:49:36,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11507 states, 9497 states have (on average 1.6351479414551964) internal successors, (15529), 9522 states have internal predecessors, (15529), 1941 states have call successors, (1941), 68 states have call predecessors, (1941), 68 states have return successors, (1941), 1916 states have call predecessors, (1941), 1941 states have call successors, (1941) [2023-11-29 01:49:36,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11507 states to 11507 states and 19411 transitions. [2023-11-29 01:49:36,188 INFO L78 Accepts]: Start accepts. Automaton has 11507 states and 19411 transitions. Word has length 754 [2023-11-29 01:49:36,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:36,189 INFO L495 AbstractCegarLoop]: Abstraction has 11507 states and 19411 transitions. [2023-11-29 01:49:36,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 5 states have call successors, (194), 3 states have call predecessors, (194), 5 states have return successors, (194), 5 states have call predecessors, (194), 5 states have call successors, (194) [2023-11-29 01:49:36,189 INFO L276 IsEmpty]: Start isEmpty. Operand 11507 states and 19411 transitions. [2023-11-29 01:49:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2023-11-29 01:49:36,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:36,201 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:36,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:49:36,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:36,401 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:36,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:36,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1031826372, now seen corresponding path program 1 times [2023-11-29 01:49:36,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:36,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118876049] [2023-11-29 01:49:36,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:36,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:36,466 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:36,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130398294] [2023-11-29 01:49:36,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:36,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:36,468 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:36,469 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:36,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:49:36,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:36,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 1663 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:49:36,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 8460 proven. 63 refuted. 0 times theorem prover too weak. 19561 trivial. 0 not checked. [2023-11-29 01:49:37,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:37,704 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 291 proven. 63 refuted. 0 times theorem prover too weak. 27730 trivial. 0 not checked. [2023-11-29 01:49:37,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:37,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118876049] [2023-11-29 01:49:37,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:37,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130398294] [2023-11-29 01:49:37,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130398294] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:37,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:49:37,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 01:49:37,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667861718] [2023-11-29 01:49:37,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:37,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 01:49:37,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:37,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 01:49:37,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-29 01:49:37,711 INFO L87 Difference]: Start difference. First operand 11507 states and 19411 transitions. Second operand has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 3 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 3 states have call predecessors, (141), 3 states have call successors, (141) [2023-11-29 01:49:42,537 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:49:46,546 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 01:49:47,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:49:47,958 INFO L93 Difference]: Finished difference Result 31683 states and 53433 transitions. [2023-11-29 01:49:47,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 01:49:47,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 3 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 3 states have call predecessors, (141), 3 states have call successors, (141) Word has length 755 [2023-11-29 01:49:47,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:49:47,995 INFO L225 Difference]: With dead ends: 31683 [2023-11-29 01:49:47,995 INFO L226 Difference]: Without dead ends: 20273 [2023-11-29 01:49:48,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1515 GetRequests, 1500 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2023-11-29 01:49:48,013 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 1039 mSDsluCounter, 1516 mSDsCounter, 0 mSdLazyCounter, 1168 mSolverCounterSat, 361 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1196 SdHoareTripleChecker+Valid, 2081 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1168 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:49:48,014 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1196 Valid, 2081 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1168 Invalid, 2 Unknown, 0 Unchecked, 9.2s Time] [2023-11-29 01:49:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20273 states. [2023-11-29 01:49:49,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20273 to 20099. [2023-11-29 01:49:49,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20099 states, 16609 states have (on average 1.640616533204889) internal successors, (27249), 16666 states have internal predecessors, (27249), 3357 states have call successors, (3357), 132 states have call predecessors, (3357), 132 states have return successors, (3357), 3300 states have call predecessors, (3357), 3357 states have call successors, (3357) [2023-11-29 01:49:49,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20099 states to 20099 states and 33963 transitions. [2023-11-29 01:49:49,355 INFO L78 Accepts]: Start accepts. Automaton has 20099 states and 33963 transitions. Word has length 755 [2023-11-29 01:49:49,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:49:49,356 INFO L495 AbstractCegarLoop]: Abstraction has 20099 states and 33963 transitions. [2023-11-29 01:49:49,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.0) internal successors, (250), 10 states have internal predecessors, (250), 3 states have call successors, (140), 2 states have call predecessors, (140), 4 states have return successors, (141), 3 states have call predecessors, (141), 3 states have call successors, (141) [2023-11-29 01:49:49,356 INFO L276 IsEmpty]: Start isEmpty. Operand 20099 states and 33963 transitions. [2023-11-29 01:49:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2023-11-29 01:49:49,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:49:49,374 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:49:49,381 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 01:49:49,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:49,574 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:49:49,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:49:49,575 INFO L85 PathProgramCache]: Analyzing trace with hash -550746114, now seen corresponding path program 1 times [2023-11-29 01:49:49,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:49:49,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573704719] [2023-11-29 01:49:49,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:49,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:49:49,637 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:49:49,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1768455825] [2023-11-29 01:49:49,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:49:49,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:49:49,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:49:49,639 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:49:49,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:49:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:49:50,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 01:49:50,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:49:50,561 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 13168 proven. 129 refuted. 0 times theorem prover too weak. 14787 trivial. 0 not checked. [2023-11-29 01:49:50,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:49:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 225 proven. 129 refuted. 0 times theorem prover too weak. 27730 trivial. 0 not checked. [2023-11-29 01:49:51,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:49:51,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573704719] [2023-11-29 01:49:51,021 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:49:51,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768455825] [2023-11-29 01:49:51,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768455825] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:49:51,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:49:51,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-29 01:49:51,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867167744] [2023-11-29 01:49:51,022 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:49:51,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:49:51,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:49:51,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:49:51,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:49:51,025 INFO L87 Difference]: Start difference. First operand 20099 states and 33963 transitions. Second operand has 16 states, 16 states have (on average 15.5625) internal successors, (249), 16 states have internal predecessors, (249), 3 states have call successors, (162), 2 states have call predecessors, (162), 4 states have return successors, (163), 3 states have call predecessors, (163), 3 states have call successors, (163) [2023-11-29 01:50:05,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:50:05,011 INFO L93 Difference]: Finished difference Result 92927 states and 154559 transitions. [2023-11-29 01:50:05,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 01:50:05,012 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.5625) internal successors, (249), 16 states have internal predecessors, (249), 3 states have call successors, (162), 2 states have call predecessors, (162), 4 states have return successors, (163), 3 states have call predecessors, (163), 3 states have call successors, (163) Word has length 755 [2023-11-29 01:50:05,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:50:05,155 INFO L225 Difference]: With dead ends: 92927 [2023-11-29 01:50:05,155 INFO L226 Difference]: Without dead ends: 72925 [2023-11-29 01:50:05,192 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1568 GetRequests, 1501 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1502 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1047, Invalid=3645, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 01:50:05,193 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 4463 mSDsluCounter, 4745 mSDsCounter, 0 mSdLazyCounter, 4204 mSolverCounterSat, 3214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4542 SdHoareTripleChecker+Valid, 5453 SdHoareTripleChecker+Invalid, 7418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3214 IncrementalHoareTripleChecker+Valid, 4204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:50:05,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4542 Valid, 5453 Invalid, 7418 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3214 Valid, 4204 Invalid, 0 Unknown, 0 Unchecked, 6.7s Time] [2023-11-29 01:50:05,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72925 states. [2023-11-29 01:50:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72925 to 24939. [2023-11-29 01:50:09,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24939 states, 21441 states have (on average 1.6507159181008348) internal successors, (35393), 21498 states have internal predecessors, (35393), 3357 states have call successors, (3357), 140 states have call predecessors, (3357), 140 states have return successors, (3357), 3300 states have call predecessors, (3357), 3357 states have call successors, (3357) [2023-11-29 01:50:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24939 states to 24939 states and 42107 transitions. [2023-11-29 01:50:09,159 INFO L78 Accepts]: Start accepts. Automaton has 24939 states and 42107 transitions. Word has length 755 [2023-11-29 01:50:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:50:09,159 INFO L495 AbstractCegarLoop]: Abstraction has 24939 states and 42107 transitions. [2023-11-29 01:50:09,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.5625) internal successors, (249), 16 states have internal predecessors, (249), 3 states have call successors, (162), 2 states have call predecessors, (162), 4 states have return successors, (163), 3 states have call predecessors, (163), 3 states have call successors, (163) [2023-11-29 01:50:09,160 INFO L276 IsEmpty]: Start isEmpty. Operand 24939 states and 42107 transitions. [2023-11-29 01:50:09,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2023-11-29 01:50:09,178 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:50:09,179 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:09,186 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 01:50:09,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:50:09,379 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:50:09,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1448139392, now seen corresponding path program 1 times [2023-11-29 01:50:09,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:09,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354877784] [2023-11-29 01:50:09,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:09,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:09,447 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:50:09,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665820767] [2023-11-29 01:50:09,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:09,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:09,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:09,449 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:09,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:50:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:09,898 INFO L262 TraceCheckSpWp]: Trace formula consists of 1663 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:50:09,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:12,172 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 7752 proven. 618 refuted. 0 times theorem prover too weak. 19714 trivial. 0 not checked. [2023-11-29 01:50:12,173 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:50:12,859 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 84 proven. 621 refuted. 0 times theorem prover too weak. 27379 trivial. 0 not checked. [2023-11-29 01:50:12,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:12,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354877784] [2023-11-29 01:50:12,859 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:50:12,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665820767] [2023-11-29 01:50:12,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665820767] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:50:12,860 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:50:12,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-29 01:50:12,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580347315] [2023-11-29 01:50:12,860 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:50:12,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:50:12,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:12,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:50:12,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:50:12,864 INFO L87 Difference]: Start difference. First operand 24939 states and 42107 transitions. Second operand has 16 states, 16 states have (on average 20.6875) internal successors, (331), 16 states have internal predecessors, (331), 5 states have call successors, (227), 3 states have call predecessors, (227), 7 states have return successors, (228), 5 states have call predecessors, (228), 5 states have call successors, (228) [2023-11-29 01:50:18,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:50:18,310 INFO L93 Difference]: Finished difference Result 76623 states and 127642 transitions. [2023-11-29 01:50:18,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 01:50:18,311 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 20.6875) internal successors, (331), 16 states have internal predecessors, (331), 5 states have call successors, (227), 3 states have call predecessors, (227), 7 states have return successors, (228), 5 states have call predecessors, (228), 5 states have call successors, (228) Word has length 755 [2023-11-29 01:50:18,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:50:18,398 INFO L225 Difference]: With dead ends: 76623 [2023-11-29 01:50:18,398 INFO L226 Difference]: Without dead ends: 51781 [2023-11-29 01:50:18,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1534 GetRequests, 1498 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=442, Invalid=964, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 01:50:18,431 INFO L413 NwaCegarLoop]: 908 mSDtfsCounter, 808 mSDsluCounter, 2013 mSDsCounter, 0 mSdLazyCounter, 1690 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 820 SdHoareTripleChecker+Valid, 2921 SdHoareTripleChecker+Invalid, 2085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 1690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:50:18,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [820 Valid, 2921 Invalid, 2085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 1690 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 01:50:18,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51781 states. [2023-11-29 01:50:22,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51781 to 31255. [2023-11-29 01:50:22,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31255 states, 24554 states have (on average 1.570823491080883) internal successors, (38570), 24675 states have internal predecessors, (38570), 6077 states have call successors, (6077), 623 states have call predecessors, (6077), 623 states have return successors, (6077), 5956 states have call predecessors, (6077), 6077 states have call successors, (6077) [2023-11-29 01:50:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31255 states to 31255 states and 50724 transitions. [2023-11-29 01:50:22,714 INFO L78 Accepts]: Start accepts. Automaton has 31255 states and 50724 transitions. Word has length 755 [2023-11-29 01:50:22,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:50:22,715 INFO L495 AbstractCegarLoop]: Abstraction has 31255 states and 50724 transitions. [2023-11-29 01:50:22,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 20.6875) internal successors, (331), 16 states have internal predecessors, (331), 5 states have call successors, (227), 3 states have call predecessors, (227), 7 states have return successors, (228), 5 states have call predecessors, (228), 5 states have call successors, (228) [2023-11-29 01:50:22,716 INFO L276 IsEmpty]: Start isEmpty. Operand 31255 states and 50724 transitions. [2023-11-29 01:50:22,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2023-11-29 01:50:22,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:50:22,730 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:22,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 01:50:22,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:22,931 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:50:22,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:22,931 INFO L85 PathProgramCache]: Analyzing trace with hash -1448079810, now seen corresponding path program 1 times [2023-11-29 01:50:22,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:22,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668611341] [2023-11-29 01:50:22,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:22,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:22,995 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:50:22,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1065103554] [2023-11-29 01:50:22,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:22,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:22,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:22,996 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:22,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:50:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:23,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 1665 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:50:23,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:50:24,255 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:50:24,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:24,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668611341] [2023-11-29 01:50:24,255 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:50:24,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065103554] [2023-11-29 01:50:24,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065103554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:50:24,255 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:50:24,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:50:24,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290223451] [2023-11-29 01:50:24,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:50:24,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:50:24,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:24,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:50:24,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:50:24,258 INFO L87 Difference]: Start difference. First operand 31255 states and 50724 transitions. Second operand has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:50:30,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:50:30,941 INFO L93 Difference]: Finished difference Result 93403 states and 151718 transitions. [2023-11-29 01:50:30,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:50:30,942 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 755 [2023-11-29 01:50:30,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:50:31,053 INFO L225 Difference]: With dead ends: 93403 [2023-11-29 01:50:31,053 INFO L226 Difference]: Without dead ends: 62257 [2023-11-29 01:50:31,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 754 GetRequests, 753 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 01:50:31,094 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 250 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:50:31,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [250 Valid, 1147 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:50:31,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62257 states. [2023-11-29 01:50:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62257 to 62255. [2023-11-29 01:50:38,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62255 states, 48914 states have (on average 1.5671995747638714) internal successors, (76658), 49155 states have internal predecessors, (76658), 12101 states have call successors, (12101), 1239 states have call predecessors, (12101), 1239 states have return successors, (12101), 11860 states have call predecessors, (12101), 12101 states have call successors, (12101) [2023-11-29 01:50:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62255 states to 62255 states and 100860 transitions. [2023-11-29 01:50:38,688 INFO L78 Accepts]: Start accepts. Automaton has 62255 states and 100860 transitions. Word has length 755 [2023-11-29 01:50:38,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:50:38,689 INFO L495 AbstractCegarLoop]: Abstraction has 62255 states and 100860 transitions. [2023-11-29 01:50:38,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.333333333333336) internal successors, (163), 2 states have internal predecessors, (163), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:50:38,689 INFO L276 IsEmpty]: Start isEmpty. Operand 62255 states and 100860 transitions. [2023-11-29 01:50:38,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 758 [2023-11-29 01:50:38,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:50:38,713 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:38,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:50:38,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:50:38,914 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:50:38,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:38,915 INFO L85 PathProgramCache]: Analyzing trace with hash -112948363, now seen corresponding path program 1 times [2023-11-29 01:50:38,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:38,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233280408] [2023-11-29 01:50:38,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:38,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:38,975 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:50:38,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [892269244] [2023-11-29 01:50:38,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:38,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:38,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:38,977 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:38,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:50:39,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:39,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:50:39,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:39,433 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:50:39,433 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:50:39,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:39,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233280408] [2023-11-29 01:50:39,433 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:50:39,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892269244] [2023-11-29 01:50:39,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892269244] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:50:39,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:50:39,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:50:39,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68795247] [2023-11-29 01:50:39,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:50:39,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:50:39,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:39,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:50:39,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:50:39,437 INFO L87 Difference]: Start difference. First operand 62255 states and 100860 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:50:46,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:50:46,596 INFO L93 Difference]: Finished difference Result 124401 states and 201565 transitions. [2023-11-29 01:50:46,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:50:46,597 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 757 [2023-11-29 01:50:46,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:50:46,726 INFO L225 Difference]: With dead ends: 124401 [2023-11-29 01:50:46,726 INFO L226 Difference]: Without dead ends: 62255 [2023-11-29 01:50:46,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 755 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 01:50:46,798 INFO L413 NwaCegarLoop]: 580 mSDtfsCounter, 0 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:50:46,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1157 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:50:46,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62255 states. [2023-11-29 01:50:54,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62255 to 62111. [2023-11-29 01:50:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62111 states, 48770 states have (on average 1.5629690383432437) internal successors, (76226), 49011 states have internal predecessors, (76226), 12101 states have call successors, (12101), 1239 states have call predecessors, (12101), 1239 states have return successors, (12101), 11860 states have call predecessors, (12101), 12101 states have call successors, (12101) [2023-11-29 01:50:54,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62111 states to 62111 states and 100428 transitions. [2023-11-29 01:50:54,822 INFO L78 Accepts]: Start accepts. Automaton has 62111 states and 100428 transitions. Word has length 757 [2023-11-29 01:50:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:50:54,822 INFO L495 AbstractCegarLoop]: Abstraction has 62111 states and 100428 transitions. [2023-11-29 01:50:54,823 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:50:54,823 INFO L276 IsEmpty]: Start isEmpty. Operand 62111 states and 100428 transitions. [2023-11-29 01:50:54,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 758 [2023-11-29 01:50:54,847 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:50:54,847 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:50:54,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:50:55,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:50:55,048 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:50:55,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:50:55,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1329102089, now seen corresponding path program 1 times [2023-11-29 01:50:55,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:50:55,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799026976] [2023-11-29 01:50:55,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:55,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:50:55,105 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:50:55,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [468404993] [2023-11-29 01:50:55,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:50:55,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:50:55,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:50:55,107 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:50:55,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:50:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:50:55,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 1667 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:50:55,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:50:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:50:56,215 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:50:56,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:50:56,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799026976] [2023-11-29 01:50:56,216 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:50:56,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468404993] [2023-11-29 01:50:56,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468404993] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:50:56,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:50:56,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:50:56,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623801507] [2023-11-29 01:50:56,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:50:56,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:50:56,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:50:56,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:50:56,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:50:56,219 INFO L87 Difference]: Start difference. First operand 62111 states and 100428 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:51:06,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:51:06,133 INFO L93 Difference]: Finished difference Result 152635 states and 247214 transitions. [2023-11-29 01:51:06,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:51:06,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 757 [2023-11-29 01:51:06,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:51:06,300 INFO L225 Difference]: With dead ends: 152635 [2023-11-29 01:51:06,300 INFO L226 Difference]: Without dead ends: 90633 [2023-11-29 01:51:06,382 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 756 GetRequests, 755 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 01:51:06,383 INFO L413 NwaCegarLoop]: 573 mSDtfsCounter, 232 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 1137 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:51:06,383 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [232 Valid, 1137 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:51:06,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90633 states. [2023-11-29 01:51:18,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90633 to 88503. [2023-11-29 01:51:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88503 states, 68522 states have (on average 1.5490791278713405) internal successors, (106146), 68883 states have internal predecessors, (106146), 18125 states have call successors, (18125), 1855 states have call predecessors, (18125), 1855 states have return successors, (18125), 17764 states have call predecessors, (18125), 18125 states have call successors, (18125) [2023-11-29 01:51:18,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88503 states to 88503 states and 142396 transitions. [2023-11-29 01:51:18,541 INFO L78 Accepts]: Start accepts. Automaton has 88503 states and 142396 transitions. Word has length 757 [2023-11-29 01:51:18,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:51:18,542 INFO L495 AbstractCegarLoop]: Abstraction has 88503 states and 142396 transitions. [2023-11-29 01:51:18,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 2 states have internal predecessors, (165), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:51:18,542 INFO L276 IsEmpty]: Start isEmpty. Operand 88503 states and 142396 transitions. [2023-11-29 01:51:18,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2023-11-29 01:51:18,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:51:18,575 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:51:18,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-29 01:51:18,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:51:18,775 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:51:18,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:51:18,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1074014863, now seen corresponding path program 1 times [2023-11-29 01:51:18,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:51:18,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9148796] [2023-11-29 01:51:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:18,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:51:18,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:51:18,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [781233984] [2023-11-29 01:51:18,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:51:18,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:51:18,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:51:18,847 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:51:18,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:51:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:51:19,444 INFO L262 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:51:19,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:51:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:51:20,165 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:51:20,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:51:20,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9148796] [2023-11-29 01:51:20,166 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:51:20,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781233984] [2023-11-29 01:51:20,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781233984] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:51:20,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:51:20,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:51:20,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543966111] [2023-11-29 01:51:20,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:51:20,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:51:20,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:51:20,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:51:20,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:51:20,168 INFO L87 Difference]: Start difference. First operand 88503 states and 142396 transitions. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:51:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:51:40,010 INFO L93 Difference]: Finished difference Result 219067 states and 349458 transitions. [2023-11-29 01:51:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:51:40,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 758 [2023-11-29 01:51:40,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:51:40,293 INFO L225 Difference]: With dead ends: 219067 [2023-11-29 01:51:40,293 INFO L226 Difference]: Without dead ends: 127697 [2023-11-29 01:51:40,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 754 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:51:40,404 INFO L413 NwaCegarLoop]: 592 mSDtfsCounter, 1011 mSDsluCounter, 1724 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 382 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 2316 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 382 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:51:40,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1011 Valid, 2316 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [382 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 01:51:40,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127697 states. [2023-11-29 01:52:01,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127697 to 127479. [2023-11-29 01:52:01,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127479 states, 90410 states have (on average 1.4844596836633115) internal successors, (134210), 91155 states have internal predecessors, (134210), 33677 states have call successors, (33677), 3391 states have call predecessors, (33677), 3391 states have return successors, (33677), 32932 states have call predecessors, (33677), 33677 states have call successors, (33677) [2023-11-29 01:52:01,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127479 states to 127479 states and 201564 transitions. [2023-11-29 01:52:01,695 INFO L78 Accepts]: Start accepts. Automaton has 127479 states and 201564 transitions. Word has length 758 [2023-11-29 01:52:01,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:52:01,696 INFO L495 AbstractCegarLoop]: Abstraction has 127479 states and 201564 transitions. [2023-11-29 01:52:01,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:52:01,697 INFO L276 IsEmpty]: Start isEmpty. Operand 127479 states and 201564 transitions. [2023-11-29 01:52:01,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2023-11-29 01:52:01,730 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:52:01,730 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:52:01,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:52:01,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:01,931 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:52:01,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:52:01,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1690765327, now seen corresponding path program 1 times [2023-11-29 01:52:01,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:52:01,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727246933] [2023-11-29 01:52:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:01,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:52:01,985 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:52:01,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163557671] [2023-11-29 01:52:01,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:52:01,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:52:01,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:52:01,987 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:52:01,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:52:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:52:02,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 1671 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 01:52:02,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:52:03,370 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:52:03,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:52:03,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:52:03,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727246933] [2023-11-29 01:52:03,371 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:52:03,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163557671] [2023-11-29 01:52:03,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163557671] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:52:03,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:52:03,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 01:52:03,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859596779] [2023-11-29 01:52:03,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:52:03,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:52:03,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:52:03,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:52:03,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:52:03,374 INFO L87 Difference]: Start difference. First operand 127479 states and 201564 transitions. Second operand has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:52:41,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:52:41,618 INFO L93 Difference]: Finished difference Result 331383 states and 517440 transitions. [2023-11-29 01:52:41,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 01:52:41,619 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 758 [2023-11-29 01:52:41,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:52:42,262 INFO L225 Difference]: With dead ends: 331383 [2023-11-29 01:52:42,262 INFO L226 Difference]: Without dead ends: 203725 [2023-11-29 01:52:42,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 754 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:52:42,465 INFO L413 NwaCegarLoop]: 568 mSDtfsCounter, 643 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 2152 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:52:42,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 2152 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:52:42,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203725 states. [2023-11-29 01:53:05,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203725 to 133047. [2023-11-29 01:53:05,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133047 states, 95978 states have (on average 1.4911958990602012) internal successors, (143122), 96723 states have internal predecessors, (143122), 33677 states have call successors, (33677), 3391 states have call predecessors, (33677), 3391 states have return successors, (33677), 32932 states have call predecessors, (33677), 33677 states have call successors, (33677) [2023-11-29 01:53:06,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133047 states to 133047 states and 210476 transitions. [2023-11-29 01:53:06,315 INFO L78 Accepts]: Start accepts. Automaton has 133047 states and 210476 transitions. Word has length 758 [2023-11-29 01:53:06,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:53:06,316 INFO L495 AbstractCegarLoop]: Abstraction has 133047 states and 210476 transitions. [2023-11-29 01:53:06,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 33.2) internal successors, (166), 5 states have internal predecessors, (166), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:53:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 133047 states and 210476 transitions. [2023-11-29 01:53:06,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 759 [2023-11-29 01:53:06,360 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:53:06,361 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:53:06,368 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:53:06,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 01:53:06,562 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:53:06,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:53:06,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1786553519, now seen corresponding path program 1 times [2023-11-29 01:53:06,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:53:06,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19020717] [2023-11-29 01:53:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:53:06,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:53:06,626 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:53:06,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1720501870] [2023-11-29 01:53:06,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:53:06,626 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:53:06,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:53:06,627 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:53:06,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:53:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:53:07,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 1670 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:53:07,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:53:07,750 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:53:07,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:53:07,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:53:07,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19020717] [2023-11-29 01:53:07,751 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:53:07,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720501870] [2023-11-29 01:53:07,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720501870] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:53:07,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:53:07,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:53:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696166482] [2023-11-29 01:53:07,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:53:07,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:53:07,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:53:07,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:53:07,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:53:07,753 INFO L87 Difference]: Start difference. First operand 133047 states and 210476 transitions. Second operand has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:53:48,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:53:48,354 INFO L93 Difference]: Finished difference Result 398347 states and 630542 transitions. [2023-11-29 01:53:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:53:48,355 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 758 [2023-11-29 01:53:48,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:53:49,071 INFO L225 Difference]: With dead ends: 398347 [2023-11-29 01:53:49,072 INFO L226 Difference]: Without dead ends: 265409 [2023-11-29 01:53:49,277 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 757 GetRequests, 756 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 01:53:49,278 INFO L413 NwaCegarLoop]: 646 mSDtfsCounter, 212 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:53:49,278 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 1215 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:53:49,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265409 states. [2023-11-29 01:54:33,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265409 to 264639. [2023-11-29 01:54:34,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264639 states, 190562 states have (on average 1.4857211826072354) internal successors, (283122), 192051 states have internal predecessors, (283122), 67301 states have call successors, (67301), 6775 states have call predecessors, (67301), 6775 states have return successors, (67301), 65812 states have call predecessors, (67301), 67301 states have call successors, (67301) [2023-11-29 01:54:35,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264639 states to 264639 states and 417724 transitions. [2023-11-29 01:54:35,592 INFO L78 Accepts]: Start accepts. Automaton has 264639 states and 417724 transitions. Word has length 758 [2023-11-29 01:54:35,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:54:35,593 INFO L495 AbstractCegarLoop]: Abstraction has 264639 states and 417724 transitions. [2023-11-29 01:54:35,593 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.333333333333336) internal successors, (166), 2 states have internal predecessors, (166), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:54:35,593 INFO L276 IsEmpty]: Start isEmpty. Operand 264639 states and 417724 transitions. [2023-11-29 01:54:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 760 [2023-11-29 01:54:35,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:54:35,667 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:54:35,676 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 01:54:35,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:35,868 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:54:35,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:54:35,869 INFO L85 PathProgramCache]: Analyzing trace with hash 643492179, now seen corresponding path program 1 times [2023-11-29 01:54:35,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:54:35,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188259579] [2023-11-29 01:54:35,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:35,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:54:35,932 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:54:35,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [220671689] [2023-11-29 01:54:35,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:54:35,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:54:35,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:54:35,935 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:54:35,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:54:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:54:36,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 1673 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:54:36,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:54:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:54:36,685 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:54:36,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:54:36,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188259579] [2023-11-29 01:54:36,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:54:36,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220671689] [2023-11-29 01:54:36,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220671689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:54:36,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:54:36,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:54:36,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377933758] [2023-11-29 01:54:36,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:54:36,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:54:36,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:54:36,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:54:36,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:54:36,689 INFO L87 Difference]: Start difference. First operand 264639 states and 417724 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:55:17,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:55:17,062 INFO L93 Difference]: Finished difference Result 398347 states and 628814 transitions. [2023-11-29 01:55:17,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:55:17,062 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 759 [2023-11-29 01:55:17,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:55:17,828 INFO L225 Difference]: With dead ends: 398347 [2023-11-29 01:55:17,828 INFO L226 Difference]: Without dead ends: 265409 [2023-11-29 01:55:18,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 758 GetRequests, 757 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 01:55:18,008 INFO L413 NwaCegarLoop]: 1149 mSDtfsCounter, 550 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 1718 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:55:18,008 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 1718 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:55:18,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265409 states. [2023-11-29 01:56:01,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265409 to 264639. [2023-11-29 01:56:01,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264639 states, 190562 states have (on average 1.4826985443057903) internal successors, (282546), 192051 states have internal predecessors, (282546), 67301 states have call successors, (67301), 6775 states have call predecessors, (67301), 6775 states have return successors, (67301), 65812 states have call predecessors, (67301), 67301 states have call successors, (67301) [2023-11-29 01:56:02,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264639 states to 264639 states and 417148 transitions. [2023-11-29 01:56:02,653 INFO L78 Accepts]: Start accepts. Automaton has 264639 states and 417148 transitions. Word has length 759 [2023-11-29 01:56:02,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:56:02,654 INFO L495 AbstractCegarLoop]: Abstraction has 264639 states and 417148 transitions. [2023-11-29 01:56:02,654 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:56:02,654 INFO L276 IsEmpty]: Start isEmpty. Operand 264639 states and 417148 transitions. [2023-11-29 01:56:02,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 761 [2023-11-29 01:56:02,722 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:56:02,723 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:56:02,731 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 01:56:02,923 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:02,924 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:56:02,924 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:56:02,924 INFO L85 PathProgramCache]: Analyzing trace with hash 1459464317, now seen corresponding path program 1 times [2023-11-29 01:56:02,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:56:02,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093118845] [2023-11-29 01:56:02,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:02,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:56:02,979 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:56:02,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1961743902] [2023-11-29 01:56:02,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:56:02,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:56:02,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:56:02,981 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:56:02,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:56:03,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:56:03,451 INFO L262 TraceCheckSpWp]: Trace formula consists of 1674 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:56:03,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:56:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:56:03,509 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:56:03,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:56:03,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093118845] [2023-11-29 01:56:03,509 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:56:03,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961743902] [2023-11-29 01:56:03,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961743902] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:56:03,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:56:03,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:56:03,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672698724] [2023-11-29 01:56:03,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:56:03,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:56:03,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:56:03,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:56:03,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:56:03,512 INFO L87 Difference]: Start difference. First operand 264639 states and 417148 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:57:04,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:57:04,213 INFO L93 Difference]: Finished difference Result 693875 states and 1096558 transitions. [2023-11-29 01:57:04,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:57:04,214 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 760 [2023-11-29 01:57:04,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:57:05,355 INFO L225 Difference]: With dead ends: 693875 [2023-11-29 01:57:05,355 INFO L226 Difference]: Without dead ends: 429345 [2023-11-29 01:57:05,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 759 GetRequests, 758 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 01:57:05,900 INFO L413 NwaCegarLoop]: 1117 mSDtfsCounter, 541 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:57:05,901 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 1691 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:57:06,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429345 states. [2023-11-29 01:58:12,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429345 to 429343. [2023-11-29 01:58:13,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429343 states, 316722 states have (on average 1.4969405346013223) internal successors, (474114), 318931 states have internal predecessors, (474114), 102341 states have call successors, (102341), 10279 states have call predecessors, (102341), 10279 states have return successors, (102341), 100132 states have call predecessors, (102341), 102341 states have call successors, (102341) [2023-11-29 01:58:15,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429343 states to 429343 states and 678796 transitions. [2023-11-29 01:58:15,151 INFO L78 Accepts]: Start accepts. Automaton has 429343 states and 678796 transitions. Word has length 760 [2023-11-29 01:58:15,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:58:15,152 INFO L495 AbstractCegarLoop]: Abstraction has 429343 states and 678796 transitions. [2023-11-29 01:58:15,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:58:15,152 INFO L276 IsEmpty]: Start isEmpty. Operand 429343 states and 678796 transitions. [2023-11-29 01:58:15,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 762 [2023-11-29 01:58:15,239 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:58:15,239 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:58:15,247 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-29 01:58:15,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 01:58:15,440 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:58:15,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:58:15,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1227674591, now seen corresponding path program 1 times [2023-11-29 01:58:15,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:58:15,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121147111] [2023-11-29 01:58:15,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:15,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:58:15,694 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:58:15,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [907712207] [2023-11-29 01:58:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:58:15,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:58:15,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:58:15,696 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:58:15,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:58:16,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:58:16,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 1674 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:58:16,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:58:16,824 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 01:58:16,824 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:58:16,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:58:16,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121147111] [2023-11-29 01:58:16,824 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:58:16,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907712207] [2023-11-29 01:58:16,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907712207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:58:16,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:58:16,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 01:58:16,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304750364] [2023-11-29 01:58:16,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:58:16,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:58:16,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:58:16,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:58:16,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:58:16,826 INFO L87 Difference]: Start difference. First operand 429343 states and 678796 transitions. Second operand has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 01:59:20,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:59:20,050 INFO L93 Difference]: Finished difference Result 858579 states and 1357438 transitions. [2023-11-29 01:59:20,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:59:20,050 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) Word has length 761 [2023-11-29 01:59:20,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:59:21,175 INFO L225 Difference]: With dead ends: 858579 [2023-11-29 01:59:21,176 INFO L226 Difference]: Without dead ends: 429345 [2023-11-29 01:59:21,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 760 GetRequests, 759 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 01:59:21,674 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 185 mSDsluCounter, 575 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1207 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:59:21,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 1207 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:59:21,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429345 states. [2023-11-29 02:00:28,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429345 to 429343. [2023-11-29 02:00:29,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429343 states, 316722 states have (on average 1.495728114876769) internal successors, (473730), 318931 states have internal predecessors, (473730), 102341 states have call successors, (102341), 10279 states have call predecessors, (102341), 10279 states have return successors, (102341), 100132 states have call predecessors, (102341), 102341 states have call successors, (102341) [2023-11-29 02:00:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429343 states to 429343 states and 678412 transitions. [2023-11-29 02:00:31,194 INFO L78 Accepts]: Start accepts. Automaton has 429343 states and 678412 transitions. Word has length 761 [2023-11-29 02:00:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:00:31,195 INFO L495 AbstractCegarLoop]: Abstraction has 429343 states and 678412 transitions. [2023-11-29 02:00:31,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.333333333333336) internal successors, (169), 2 states have internal predecessors, (169), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119) [2023-11-29 02:00:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 429343 states and 678412 transitions. [2023-11-29 02:00:31,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 763 [2023-11-29 02:00:31,274 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:00:31,275 INFO L195 NwaCegarLoop]: trace histogram [119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:00:31,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 02:00:31,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 02:00:31,475 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:00:31,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:00:31,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1926082493, now seen corresponding path program 1 times [2023-11-29 02:00:31,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:00:31,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890381996] [2023-11-29 02:00:31,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:31,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:00:31,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:00:31,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [924724597] [2023-11-29 02:00:31,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:00:31,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:00:31,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:00:31,528 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:00:31,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_810ef7be-4e67-4ece-9aa6-5b2763e982ab/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 02:00:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:00:32,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 1676 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:00:32,310 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:00:32,956 INFO L134 CoverageAnalysis]: Checked inductivity of 28084 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28084 trivial. 0 not checked. [2023-11-29 02:00:32,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:00:32,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:00:32,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890381996] [2023-11-29 02:00:32,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:00:32,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924724597] [2023-11-29 02:00:32,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924724597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:00:32,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:00:32,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:00:32,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122941197] [2023-11-29 02:00:32,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:00:32,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:00:32,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:00:32,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:00:32,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:00:32,959 INFO L87 Difference]: Start difference. First operand 429343 states and 678412 transitions. Second operand has 4 states, 4 states have (on average 42.5) internal successors, (170), 3 states have internal predecessors, (170), 1 states have call successors, (119), 1 states have call predecessors, (119), 1 states have return successors, (119), 1 states have call predecessors, (119), 1 states have call successors, (119)