./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-36.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_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/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_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-36.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/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_12b2c067-1cfc-44e3-ae52-7b15f820531d/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 08d675ba4148739e9e7cf1bbda146cfc1e7cae9e235e349f1daedec05eaa7d10 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:50:14,338 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:50:14,403 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:50:14,407 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:50:14,407 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:50:14,432 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:50:14,433 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:50:14,433 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:50:14,434 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:50:14,434 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:50:14,435 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:50:14,435 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:50:14,436 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:50:14,437 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:50:14,437 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:50:14,438 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:50:14,438 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:50:14,439 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:50:14,439 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:50:14,440 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:50:14,440 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:50:14,445 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:50:14,445 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:50:14,446 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:50:14,446 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:50:14,446 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:50:14,447 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:50:14,447 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:50:14,448 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:50:14,448 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:50:14,448 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:50:14,449 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:50:14,449 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:50:14,449 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:50:14,449 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:50:14,450 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:50:14,450 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:50:14,450 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:50:14,450 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:50:14,450 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:50:14,451 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:50:14,451 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:50:14,451 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_12b2c067-1cfc-44e3-ae52-7b15f820531d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 08d675ba4148739e9e7cf1bbda146cfc1e7cae9e235e349f1daedec05eaa7d10 [2023-11-29 06:50:14,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:50:14,687 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:50:14,690 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:50:14,691 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:50:14,691 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:50:14,693 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-36.i [2023-11-29 06:50:17,487 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:50:17,722 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:50:17,723 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-36.i [2023-11-29 06:50:17,735 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/data/898cc87e9/6979c9383db94274a8c3bc47736afafc/FLAGd36e49b1d [2023-11-29 06:50:17,750 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/data/898cc87e9/6979c9383db94274a8c3bc47736afafc [2023-11-29 06:50:17,752 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:50:17,754 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:50:17,755 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:50:17,755 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:50:17,760 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:50:17,761 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:50:17" (1/1) ... [2023-11-29 06:50:17,762 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@711d425c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:17, skipping insertion in model container [2023-11-29 06:50:17,762 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:50:17" (1/1) ... [2023-11-29 06:50:17,806 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:50:17,929 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_12b2c067-1cfc-44e3-ae52-7b15f820531d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-36.i[916,929] [2023-11-29 06:50:18,070 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:50:18,087 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:50:18,098 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_12b2c067-1cfc-44e3-ae52-7b15f820531d/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-36.i[916,929] [2023-11-29 06:50:18,167 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:50:18,187 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:50:18,187 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18 WrapperNode [2023-11-29 06:50:18,188 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:50:18,189 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:50:18,189 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:50:18,189 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:50:18,195 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18" (1/1) ... [2023-11-29 06:50:18,217 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18" (1/1) ... [2023-11-29 06:50:18,280 INFO L138 Inliner]: procedures = 26, calls = 105, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 611 [2023-11-29 06:50:18,280 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:50:18,281 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:50:18,281 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:50:18,281 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:50:18,293 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18" (1/1) ... [2023-11-29 06:50:18,293 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18" (1/1) ... [2023-11-29 06:50:18,302 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18" (1/1) ... [2023-11-29 06:50:18,333 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 06:50:18,333 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18" (1/1) ... [2023-11-29 06:50:18,333 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18" (1/1) ... [2023-11-29 06:50:18,353 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18" (1/1) ... [2023-11-29 06:50:18,360 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18" (1/1) ... [2023-11-29 06:50:18,370 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18" (1/1) ... [2023-11-29 06:50:18,377 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18" (1/1) ... [2023-11-29 06:50:18,388 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:50:18,389 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:50:18,390 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:50:18,390 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:50:18,390 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18" (1/1) ... [2023-11-29 06:50:18,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:50:18,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:18,447 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:50:18,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:50:18,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:50:18,482 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 06:50:18,482 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 06:50:18,482 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:50:18,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:50:18,482 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:50:18,630 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:50:18,632 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:50:19,314 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:50:19,359 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:50:19,359 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 06:50:19,360 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:50:19 BoogieIcfgContainer [2023-11-29 06:50:19,360 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:50:19,363 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:50:19,363 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:50:19,375 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:50:19,376 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:50:17" (1/3) ... [2023-11-29 06:50:19,376 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468ba190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:50:19, skipping insertion in model container [2023-11-29 06:50:19,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:50:18" (2/3) ... [2023-11-29 06:50:19,377 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@468ba190 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:50:19, skipping insertion in model container [2023-11-29 06:50:19,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:50:19" (3/3) ... [2023-11-29 06:50:19,378 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-36.i [2023-11-29 06:50:19,399 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:50:19,399 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:50:19,460 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:50:19,467 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;@7fd697c5, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:50:19,467 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:50:19,474 INFO L276 IsEmpty]: Start isEmpty. Operand has 244 states, 149 states have (on average 1.5570469798657718) internal successors, (232), 150 states have internal predecessors, (232), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-29 06:50:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:50:19,513 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:19,514 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:19,515 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:19,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:19,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1678376901, now seen corresponding path program 1 times [2023-11-29 06:50:19,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:19,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887234267] [2023-11-29 06:50:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:19,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:19,896 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:19,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887234267] [2023-11-29 06:50:19,897 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 06:50:19,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521471142] [2023-11-29 06:50:19,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:19,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:19,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:19,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:19,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:50:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:20,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 06:50:20,324 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 182 proven. 0 refuted. 0 times theorem prover too weak. 16562 trivial. 0 not checked. [2023-11-29 06:50:20,408 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:50:20,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1521471142] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:20,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:50:20,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:50:20,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710748585] [2023-11-29 06:50:20,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:20,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:50:20,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:20,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:50:20,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:50:20,451 INFO L87 Difference]: Start difference. First operand has 244 states, 149 states have (on average 1.5570469798657718) internal successors, (232), 150 states have internal predecessors, (232), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 2 states, 2 states have (on average 57.5) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (92), 2 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-29 06:50:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:20,531 INFO L93 Difference]: Finished difference Result 482 states and 917 transitions. [2023-11-29 06:50:20,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:50:20,559 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 57.5) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (92), 2 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 2 states have call successors, (92) Word has length 570 [2023-11-29 06:50:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:20,571 INFO L225 Difference]: With dead ends: 482 [2023-11-29 06:50:20,571 INFO L226 Difference]: Without dead ends: 239 [2023-11-29 06:50:20,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 569 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 06:50:20,581 INFO L413 NwaCegarLoop]: 399 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, 399 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 06:50:20,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 399 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:50:20,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2023-11-29 06:50:20,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 239. [2023-11-29 06:50:20,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 145 states have (on average 1.5034482758620689) internal successors, (218), 145 states have internal predecessors, (218), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-29 06:50:20,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 402 transitions. [2023-11-29 06:50:20,670 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 402 transitions. Word has length 570 [2023-11-29 06:50:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:20,671 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 402 transitions. [2023-11-29 06:50:20,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 57.5) internal successors, (115), 2 states have internal predecessors, (115), 2 states have call successors, (92), 2 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-29 06:50:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 402 transitions. [2023-11-29 06:50:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:50:20,691 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:20,692 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:20,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:50:20,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 06:50:20,893 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:20,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:20,894 INFO L85 PathProgramCache]: Analyzing trace with hash -17955113, now seen corresponding path program 1 times [2023-11-29 06:50:20,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:20,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492619987] [2023-11-29 06:50:20,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:20,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:21,018 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:50:21,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2053901668] [2023-11-29 06:50:21,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:21,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:21,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:21,021 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:21,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:50:21,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:21,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:50:21,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:21,472 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 06:50:21,473 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:50:21,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:21,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492619987] [2023-11-29 06:50:21,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:50:21,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053901668] [2023-11-29 06:50:21,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053901668] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:21,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:50:21,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:50:21,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419569544] [2023-11-29 06:50:21,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:21,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:50:21,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:21,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:50:21,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:50:21,480 INFO L87 Difference]: Start difference. First operand 239 states and 402 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:21,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:21,768 INFO L93 Difference]: Finished difference Result 740 states and 1252 transitions. [2023-11-29 06:50:21,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:50:21,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-29 06:50:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:21,778 INFO L225 Difference]: With dead ends: 740 [2023-11-29 06:50:21,778 INFO L226 Difference]: Without dead ends: 502 [2023-11-29 06:50:21,780 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 567 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 06:50:21,781 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 435 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 1091 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:21,782 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 1091 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:50:21,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2023-11-29 06:50:21,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 496. [2023-11-29 06:50:21,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 350 states have (on average 1.6028571428571428) internal successors, (561), 352 states have internal predecessors, (561), 142 states have call successors, (142), 3 states have call predecessors, (142), 3 states have return successors, (142), 140 states have call predecessors, (142), 142 states have call successors, (142) [2023-11-29 06:50:21,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 845 transitions. [2023-11-29 06:50:21,858 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 845 transitions. Word has length 570 [2023-11-29 06:50:21,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:21,861 INFO L495 AbstractCegarLoop]: Abstraction has 496 states and 845 transitions. [2023-11-29 06:50:21,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 845 transitions. [2023-11-29 06:50:21,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:50:21,868 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:21,868 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:21,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:50:22,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:22,070 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:22,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:22,070 INFO L85 PathProgramCache]: Analyzing trace with hash 45789391, now seen corresponding path program 1 times [2023-11-29 06:50:22,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:22,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676841945] [2023-11-29 06:50:22,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:22,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:22,164 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:50:22,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1796706642] [2023-11-29 06:50:22,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:22,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:22,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:22,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:22,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:50:22,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:22,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:50:22,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 06:50:22,634 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:50:22,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:22,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676841945] [2023-11-29 06:50:22,635 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:50:22,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796706642] [2023-11-29 06:50:22,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796706642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:22,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:50:22,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:50:22,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225627942] [2023-11-29 06:50:22,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:22,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:50:22,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:22,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:50:22,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:50:22,639 INFO L87 Difference]: Start difference. First operand 496 states and 845 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:22,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:22,722 INFO L93 Difference]: Finished difference Result 1486 states and 2533 transitions. [2023-11-29 06:50:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:50:22,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-29 06:50:22,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:22,735 INFO L225 Difference]: With dead ends: 1486 [2023-11-29 06:50:22,735 INFO L226 Difference]: Without dead ends: 991 [2023-11-29 06:50:22,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 568 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 06:50:22,739 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 381 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1101 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:22,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1101 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:50:22,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 991 states. [2023-11-29 06:50:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 991 to 989. [2023-11-29 06:50:22,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 989 states, 698 states have (on average 1.6002865329512894) internal successors, (1117), 702 states have internal predecessors, (1117), 284 states have call successors, (284), 6 states have call predecessors, (284), 6 states have return successors, (284), 280 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-29 06:50:22,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 989 states to 989 states and 1685 transitions. [2023-11-29 06:50:22,885 INFO L78 Accepts]: Start accepts. Automaton has 989 states and 1685 transitions. Word has length 570 [2023-11-29 06:50:22,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:22,887 INFO L495 AbstractCegarLoop]: Abstraction has 989 states and 1685 transitions. [2023-11-29 06:50:22,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:22,888 INFO L276 IsEmpty]: Start isEmpty. Operand 989 states and 1685 transitions. [2023-11-29 06:50:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:50:22,894 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:22,894 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:22,902 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 06:50:23,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:23,095 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:23,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:23,096 INFO L85 PathProgramCache]: Analyzing trace with hash -975278963, now seen corresponding path program 1 times [2023-11-29 06:50:23,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:23,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284181045] [2023-11-29 06:50:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:23,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:23,163 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:50:23,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [151691301] [2023-11-29 06:50:23,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:23,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:23,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:23,164 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:23,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:50:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:23,545 INFO L262 TraceCheckSpWp]: Trace formula consists of 1240 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:50:23,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:23,682 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 06:50:23,683 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:50:23,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:23,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284181045] [2023-11-29 06:50:23,683 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:50:23,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151691301] [2023-11-29 06:50:23,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151691301] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:23,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:50:23,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:50:23,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792116311] [2023-11-29 06:50:23,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:23,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:50:23,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:23,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:50:23,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:50:23,688 INFO L87 Difference]: Start difference. First operand 989 states and 1685 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:23,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:23,814 INFO L93 Difference]: Finished difference Result 2723 states and 4629 transitions. [2023-11-29 06:50:23,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:50:23,815 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-29 06:50:23,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:23,832 INFO L225 Difference]: With dead ends: 2723 [2023-11-29 06:50:23,832 INFO L226 Difference]: Without dead ends: 1735 [2023-11-29 06:50:23,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 568 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 06:50:23,837 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 198 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:23,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 879 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:50:23,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2023-11-29 06:50:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1731. [2023-11-29 06:50:24,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1731 states, 1258 states have (on average 1.5930047694753577) internal successors, (2004), 1268 states have internal predecessors, (2004), 460 states have call successors, (460), 12 states have call predecessors, (460), 12 states have return successors, (460), 450 states have call predecessors, (460), 460 states have call successors, (460) [2023-11-29 06:50:24,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1731 states to 1731 states and 2924 transitions. [2023-11-29 06:50:24,073 INFO L78 Accepts]: Start accepts. Automaton has 1731 states and 2924 transitions. Word has length 570 [2023-11-29 06:50:24,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:24,074 INFO L495 AbstractCegarLoop]: Abstraction has 1731 states and 2924 transitions. [2023-11-29 06:50:24,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 1731 states and 2924 transitions. [2023-11-29 06:50:24,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:50:24,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:24,082 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:24,090 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:50:24,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:24,289 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:24,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:24,289 INFO L85 PathProgramCache]: Analyzing trace with hash 2039824655, now seen corresponding path program 1 times [2023-11-29 06:50:24,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:24,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423532170] [2023-11-29 06:50:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:24,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:24,348 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:50:24,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [324257618] [2023-11-29 06:50:24,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:24,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:24,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:24,350 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:24,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:50:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:24,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:50:24,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:24,718 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 06:50:24,719 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:50:24,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:24,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423532170] [2023-11-29 06:50:24,719 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:50:24,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324257618] [2023-11-29 06:50:24,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324257618] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:24,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:50:24,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:50:24,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369113908] [2023-11-29 06:50:24,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:24,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:50:24,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:24,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:50:24,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:50:24,723 INFO L87 Difference]: Start difference. First operand 1731 states and 2924 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:24,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:24,821 INFO L93 Difference]: Finished difference Result 3667 states and 6184 transitions. [2023-11-29 06:50:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:50:24,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-29 06:50:24,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:24,833 INFO L225 Difference]: With dead ends: 3667 [2023-11-29 06:50:24,834 INFO L226 Difference]: Without dead ends: 1937 [2023-11-29 06:50:24,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 568 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 06:50:24,839 INFO L413 NwaCegarLoop]: 395 mSDtfsCounter, 25 mSDsluCounter, 386 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 781 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:24,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 781 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:50:24,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1937 states. [2023-11-29 06:50:24,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1937 to 1887. [2023-11-29 06:50:24,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1414 states have (on average 1.5785007072135786) internal successors, (2232), 1424 states have internal predecessors, (2232), 460 states have call successors, (460), 12 states have call predecessors, (460), 12 states have return successors, (460), 450 states have call predecessors, (460), 460 states have call successors, (460) [2023-11-29 06:50:24,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 3152 transitions. [2023-11-29 06:50:24,993 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 3152 transitions. Word has length 570 [2023-11-29 06:50:24,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:24,993 INFO L495 AbstractCegarLoop]: Abstraction has 1887 states and 3152 transitions. [2023-11-29 06:50:24,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 3 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:24,994 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 3152 transitions. [2023-11-29 06:50:24,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:50:24,999 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:24,999 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:25,005 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:50:25,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:25,200 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:25,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:25,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1338760077, now seen corresponding path program 1 times [2023-11-29 06:50:25,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:25,201 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652727461] [2023-11-29 06:50:25,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:25,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:25,257 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:50:25,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1869246262] [2023-11-29 06:50:25,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:25,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:25,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:25,259 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:25,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:50:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:25,599 INFO L262 TraceCheckSpWp]: Trace formula consists of 1240 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:50:25,611 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:25,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 06:50:25,913 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:50:25,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:25,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652727461] [2023-11-29 06:50:25,914 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:50:25,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869246262] [2023-11-29 06:50:25,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869246262] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:25,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:50:25,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 06:50:25,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430054516] [2023-11-29 06:50:25,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:25,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 06:50:25,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:25,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 06:50:25,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:50:25,918 INFO L87 Difference]: Start difference. First operand 1887 states and 3152 transitions. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:28,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:28,526 INFO L93 Difference]: Finished difference Result 10161 states and 16809 transitions. [2023-11-29 06:50:28,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:50:28,528 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-29 06:50:28,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:28,585 INFO L225 Difference]: With dead ends: 10161 [2023-11-29 06:50:28,585 INFO L226 Difference]: Without dead ends: 8275 [2023-11-29 06:50:28,593 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2023-11-29 06:50:28,594 INFO L413 NwaCegarLoop]: 623 mSDtfsCounter, 1407 mSDsluCounter, 2948 mSDsCounter, 0 mSdLazyCounter, 1347 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1407 SdHoareTripleChecker+Valid, 3571 SdHoareTripleChecker+Invalid, 1838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 1347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:28,594 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1407 Valid, 3571 Invalid, 1838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 1347 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 06:50:28,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8275 states. [2023-11-29 06:50:29,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8275 to 6929. [2023-11-29 06:50:29,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6929 states, 5242 states have (on average 1.5635253719954216) internal successors, (8196), 5288 states have internal predecessors, (8196), 1636 states have call successors, (1636), 50 states have call predecessors, (1636), 50 states have return successors, (1636), 1590 states have call predecessors, (1636), 1636 states have call successors, (1636) [2023-11-29 06:50:29,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6929 states to 6929 states and 11468 transitions. [2023-11-29 06:50:29,502 INFO L78 Accepts]: Start accepts. Automaton has 6929 states and 11468 transitions. Word has length 570 [2023-11-29 06:50:29,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:29,504 INFO L495 AbstractCegarLoop]: Abstraction has 6929 states and 11468 transitions. [2023-11-29 06:50:29,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 6929 states and 11468 transitions. [2023-11-29 06:50:29,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:50:29,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:29,519 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:29,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 06:50:29,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 06:50:29,720 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:29,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:29,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1479308687, now seen corresponding path program 1 times [2023-11-29 06:50:29,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:29,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811163321] [2023-11-29 06:50:29,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:29,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:29,783 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:50:29,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159761160] [2023-11-29 06:50:29,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:29,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:29,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:29,785 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:29,789 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:50:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:30,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:50:30,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:30,851 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 06:50:30,851 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:50:30,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:30,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811163321] [2023-11-29 06:50:30,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:50:30,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159761160] [2023-11-29 06:50:30,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159761160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:30,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:50:30,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:50:30,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420684945] [2023-11-29 06:50:30,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:30,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:50:30,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:30,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:50:30,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:50:30,855 INFO L87 Difference]: Start difference. First operand 6929 states and 11468 transitions. Second operand has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:31,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:31,533 INFO L93 Difference]: Finished difference Result 20785 states and 34402 transitions. [2023-11-29 06:50:31,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:50:31,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-29 06:50:31,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:31,602 INFO L225 Difference]: With dead ends: 20785 [2023-11-29 06:50:31,602 INFO L226 Difference]: Without dead ends: 13857 [2023-11-29 06:50:31,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 568 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 06:50:31,624 INFO L413 NwaCegarLoop]: 396 mSDtfsCounter, 126 mSDsluCounter, 394 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 790 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 06:50:31,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 790 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:50:31,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13857 states. [2023-11-29 06:50:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13857 to 13855. [2023-11-29 06:50:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13855 states, 10482 states have (on average 1.5590536157221904) internal successors, (16342), 10574 states have internal predecessors, (16342), 3272 states have call successors, (3272), 100 states have call predecessors, (3272), 100 states have return successors, (3272), 3180 states have call predecessors, (3272), 3272 states have call successors, (3272) [2023-11-29 06:50:33,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13855 states to 13855 states and 22886 transitions. [2023-11-29 06:50:33,094 INFO L78 Accepts]: Start accepts. Automaton has 13855 states and 22886 transitions. Word has length 570 [2023-11-29 06:50:33,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:33,095 INFO L495 AbstractCegarLoop]: Abstraction has 13855 states and 22886 transitions. [2023-11-29 06:50:33,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.666666666666664) internal successors, (113), 2 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:33,096 INFO L276 IsEmpty]: Start isEmpty. Operand 13855 states and 22886 transitions. [2023-11-29 06:50:33,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:50:33,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:33,111 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:33,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:50:33,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 06:50:33,312 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:33,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:33,313 INFO L85 PathProgramCache]: Analyzing trace with hash -326129647, now seen corresponding path program 1 times [2023-11-29 06:50:33,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:33,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928000026] [2023-11-29 06:50:33,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:33,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:33,377 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:50:33,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1928245844] [2023-11-29 06:50:33,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:33,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:33,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:33,379 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:33,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:50:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:33,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:50:33,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:34,193 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8407 proven. 147 refuted. 0 times theorem prover too weak. 8190 trivial. 0 not checked. [2023-11-29 06:50:34,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:50:34,606 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 126 proven. 147 refuted. 0 times theorem prover too weak. 16471 trivial. 0 not checked. [2023-11-29 06:50:34,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:34,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928000026] [2023-11-29 06:50:34,606 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:50:34,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928245844] [2023-11-29 06:50:34,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928245844] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:50:34,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:50:34,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 06:50:34,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675179683] [2023-11-29 06:50:34,607 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:50:34,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:50:34,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:50:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:50:34,610 INFO L87 Difference]: Start difference. First operand 13855 states and 22886 transitions. Second operand has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 2 states have call successors, (141), 2 states have call predecessors, (141), 4 states have return successors, (142), 2 states have call predecessors, (142), 2 states have call successors, (142) [2023-11-29 06:50:35,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:35,984 INFO L93 Difference]: Finished difference Result 27965 states and 46011 transitions. [2023-11-29 06:50:35,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:50:35,985 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 2 states have call successors, (141), 2 states have call predecessors, (141), 4 states have return successors, (142), 2 states have call predecessors, (142), 2 states have call successors, (142) Word has length 570 [2023-11-29 06:50:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:36,036 INFO L225 Difference]: With dead ends: 27965 [2023-11-29 06:50:36,036 INFO L226 Difference]: Without dead ends: 14111 [2023-11-29 06:50:36,069 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 1132 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:50:36,070 INFO L413 NwaCegarLoop]: 300 mSDtfsCounter, 340 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 472 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:36,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 714 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 472 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:50:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14111 states. [2023-11-29 06:50:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14111 to 13919. [2023-11-29 06:50:37,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13919 states, 10530 states have (on average 1.5473884140550807) internal successors, (16294), 10622 states have internal predecessors, (16294), 3272 states have call successors, (3272), 116 states have call predecessors, (3272), 116 states have return successors, (3272), 3180 states have call predecessors, (3272), 3272 states have call successors, (3272) [2023-11-29 06:50:37,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13919 states to 13919 states and 22838 transitions. [2023-11-29 06:50:37,088 INFO L78 Accepts]: Start accepts. Automaton has 13919 states and 22838 transitions. Word has length 570 [2023-11-29 06:50:37,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:37,089 INFO L495 AbstractCegarLoop]: Abstraction has 13919 states and 22838 transitions. [2023-11-29 06:50:37,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.428571428571427) internal successors, (122), 7 states have internal predecessors, (122), 2 states have call successors, (141), 2 states have call predecessors, (141), 4 states have return successors, (142), 2 states have call predecessors, (142), 2 states have call successors, (142) [2023-11-29 06:50:37,090 INFO L276 IsEmpty]: Start isEmpty. Operand 13919 states and 22838 transitions. [2023-11-29 06:50:37,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:50:37,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:37,101 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:37,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 06:50:37,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:37,302 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:37,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:37,303 INFO L85 PathProgramCache]: Analyzing trace with hash 1668015059, now seen corresponding path program 1 times [2023-11-29 06:50:37,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:37,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728694236] [2023-11-29 06:50:37,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:37,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:37,358 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:50:37,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281515995] [2023-11-29 06:50:37,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:37,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:37,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:37,360 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:37,362 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:50:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:37,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:50:37,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:37,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 06:50:37,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:50:37,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:37,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728694236] [2023-11-29 06:50:37,774 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:50:37,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281515995] [2023-11-29 06:50:37,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281515995] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:37,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:50:37,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:50:37,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715789550] [2023-11-29 06:50:37,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:37,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:50:37,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:37,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:50:37,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:50:37,778 INFO L87 Difference]: Start difference. First operand 13919 states and 22838 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:39,123 INFO L93 Difference]: Finished difference Result 33833 states and 55357 transitions. [2023-11-29 06:50:39,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:50:39,124 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-29 06:50:39,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:39,192 INFO L225 Difference]: With dead ends: 33833 [2023-11-29 06:50:39,193 INFO L226 Difference]: Without dead ends: 18379 [2023-11-29 06:50:39,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 568 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 06:50:39,231 INFO L413 NwaCegarLoop]: 538 mSDtfsCounter, 343 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:39,232 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 1230 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:50:39,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18379 states. [2023-11-29 06:50:40,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18379 to 18367. [2023-11-29 06:50:40,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18367 states, 13482 states have (on average 1.5112001186767543) internal successors, (20374), 13622 states have internal predecessors, (20374), 4712 states have call successors, (4712), 172 states have call predecessors, (4712), 172 states have return successors, (4712), 4572 states have call predecessors, (4712), 4712 states have call successors, (4712) [2023-11-29 06:50:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18367 states to 18367 states and 29798 transitions. [2023-11-29 06:50:40,672 INFO L78 Accepts]: Start accepts. Automaton has 18367 states and 29798 transitions. Word has length 570 [2023-11-29 06:50:40,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:40,673 INFO L495 AbstractCegarLoop]: Abstraction has 18367 states and 29798 transitions. [2023-11-29 06:50:40,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:40,673 INFO L276 IsEmpty]: Start isEmpty. Operand 18367 states and 29798 transitions. [2023-11-29 06:50:40,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:50:40,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:40,686 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:40,693 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:50:40,886 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:40,887 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:40,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:40,887 INFO L85 PathProgramCache]: Analyzing trace with hash -1533497325, now seen corresponding path program 1 times [2023-11-29 06:50:40,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:40,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417019078] [2023-11-29 06:50:40,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:40,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:40,947 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:50:40,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1784344613] [2023-11-29 06:50:40,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:40,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:40,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:40,949 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:40,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:50:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:41,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:50:41,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:41,747 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 7407 proven. 87 refuted. 0 times theorem prover too weak. 9250 trivial. 0 not checked. [2023-11-29 06:50:41,747 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:50:42,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 186 proven. 87 refuted. 0 times theorem prover too weak. 16471 trivial. 0 not checked. [2023-11-29 06:50:42,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:42,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417019078] [2023-11-29 06:50:42,105 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:50:42,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784344613] [2023-11-29 06:50:42,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784344613] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:50:42,105 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:50:42,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-29 06:50:42,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081014852] [2023-11-29 06:50:42,106 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:50:42,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:50:42,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:42,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:50:42,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:50:42,110 INFO L87 Difference]: Start difference. First operand 18367 states and 29798 transitions. Second operand has 18 states, 18 states have (on average 9.0) internal successors, (162), 18 states have internal predecessors, (162), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) [2023-11-29 06:50:47,395 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 06:50:51,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:51,544 INFO L93 Difference]: Finished difference Result 66709 states and 107079 transitions. [2023-11-29 06:50:51,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 06:50:51,544 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.0) internal successors, (162), 18 states have internal predecessors, (162), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) Word has length 570 [2023-11-29 06:50:51,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:51,658 INFO L225 Difference]: With dead ends: 66709 [2023-11-29 06:50:51,659 INFO L226 Difference]: Without dead ends: 48343 [2023-11-29 06:50:51,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1165 GetRequests, 1125 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=478, Invalid=1244, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 06:50:51,696 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 2096 mSDsluCounter, 1687 mSDsCounter, 0 mSdLazyCounter, 2559 mSolverCounterSat, 778 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2218 SdHoareTripleChecker+Valid, 2074 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 2559 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:51,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2218 Valid, 2074 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 2559 Invalid, 1 Unknown, 0 Unchecked, 6.1s Time] [2023-11-29 06:50:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48343 states. [2023-11-29 06:50:54,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48343 to 27571. [2023-11-29 06:50:54,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27571 states, 20450 states have (on average 1.5089486552567237) internal successors, (30858), 20662 states have internal predecessors, (30858), 6876 states have call successors, (6876), 244 states have call predecessors, (6876), 244 states have return successors, (6876), 6664 states have call predecessors, (6876), 6876 states have call successors, (6876) [2023-11-29 06:50:54,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27571 states to 27571 states and 44610 transitions. [2023-11-29 06:50:54,231 INFO L78 Accepts]: Start accepts. Automaton has 27571 states and 44610 transitions. Word has length 570 [2023-11-29 06:50:54,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:54,232 INFO L495 AbstractCegarLoop]: Abstraction has 27571 states and 44610 transitions. [2023-11-29 06:50:54,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.0) internal successors, (162), 18 states have internal predecessors, (162), 3 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 3 states have call predecessors, (122), 3 states have call successors, (122) [2023-11-29 06:50:54,232 INFO L276 IsEmpty]: Start isEmpty. Operand 27571 states and 44610 transitions. [2023-11-29 06:50:54,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:50:54,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:54,249 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:50:54,257 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:50:54,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:50:54,450 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:54,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:54,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1917464469, now seen corresponding path program 1 times [2023-11-29 06:50:54,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:54,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618897809] [2023-11-29 06:50:54,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:54,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:54,498 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:50:54,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634717126] [2023-11-29 06:50:54,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:54,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:54,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:54,500 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:54,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:50:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:54,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:50:54,867 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 06:50:54,965 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:50:54,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:54,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618897809] [2023-11-29 06:50:54,966 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:50:54,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634717126] [2023-11-29 06:50:54,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634717126] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:50:54,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:50:54,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:50:54,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140783676] [2023-11-29 06:50:54,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:50:54,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:50:54,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:54,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:50:54,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:50:54,970 INFO L87 Difference]: Start difference. First operand 27571 states and 44610 transitions. Second operand has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:50:59,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:50:59,638 INFO L93 Difference]: Finished difference Result 66448 states and 106934 transitions. [2023-11-29 06:50:59,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:50:59,639 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-29 06:50:59,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:59,722 INFO L225 Difference]: With dead ends: 66448 [2023-11-29 06:50:59,723 INFO L226 Difference]: Without dead ends: 38878 [2023-11-29 06:50:59,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 576 GetRequests, 566 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:50:59,766 INFO L413 NwaCegarLoop]: 431 mSDtfsCounter, 886 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 788 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 2065 SdHoareTripleChecker+Invalid, 1014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:59,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [886 Valid, 2065 Invalid, 1014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 788 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 06:50:59,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38878 states. [2023-11-29 06:51:03,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38878 to 38751. [2023-11-29 06:51:03,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38751 states, 28837 states have (on average 1.502132676769428) internal successors, (43317), 29130 states have internal predecessors, (43317), 9434 states have call successors, (9434), 479 states have call predecessors, (9434), 479 states have return successors, (9434), 9141 states have call predecessors, (9434), 9434 states have call successors, (9434) [2023-11-29 06:51:03,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38751 states to 38751 states and 62185 transitions. [2023-11-29 06:51:03,669 INFO L78 Accepts]: Start accepts. Automaton has 38751 states and 62185 transitions. Word has length 570 [2023-11-29 06:51:03,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:51:03,670 INFO L495 AbstractCegarLoop]: Abstraction has 38751 states and 62185 transitions. [2023-11-29 06:51:03,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.142857142857142) internal successors, (113), 7 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:51:03,671 INFO L276 IsEmpty]: Start isEmpty. Operand 38751 states and 62185 transitions. [2023-11-29 06:51:03,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:51:03,699 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:51:03,699 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:51:03,705 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:51:03,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:51:03,900 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:51:03,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:03,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1896422569, now seen corresponding path program 1 times [2023-11-29 06:51:03,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:03,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573640536] [2023-11-29 06:51:03,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:03,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:03,954 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:51:03,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057383734] [2023-11-29 06:51:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:03,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:51:03,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:51:03,955 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:51:03,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:51:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:04,354 INFO L262 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 06:51:04,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:51:04,795 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8382 proven. 156 refuted. 0 times theorem prover too weak. 8206 trivial. 0 not checked. [2023-11-29 06:51:04,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:51:05,082 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 06:51:05,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:05,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573640536] [2023-11-29 06:51:05,082 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:51:05,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057383734] [2023-11-29 06:51:05,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057383734] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:51:05,083 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:51:05,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2023-11-29 06:51:05,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066388825] [2023-11-29 06:51:05,083 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:05,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:51:05,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:05,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:51:05,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:51:05,086 INFO L87 Difference]: Start difference. First operand 38751 states and 62185 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:51:11,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:51:11,171 INFO L93 Difference]: Finished difference Result 109593 states and 175688 transitions. [2023-11-29 06:51:11,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:51:11,172 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-29 06:51:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:51:11,320 INFO L225 Difference]: With dead ends: 109593 [2023-11-29 06:51:11,320 INFO L226 Difference]: Without dead ends: 70903 [2023-11-29 06:51:11,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1138 GetRequests, 1126 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:51:11,384 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 782 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 782 SdHoareTripleChecker+Valid, 915 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:51:11,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [782 Valid, 915 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:51:11,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70903 states. [2023-11-29 06:51:17,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70903 to 61515. [2023-11-29 06:51:17,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61515 states, 46341 states have (on average 1.5080598174402797) internal successors, (69885), 46778 states have internal predecessors, (69885), 14406 states have call successors, (14406), 767 states have call predecessors, (14406), 767 states have return successors, (14406), 13969 states have call predecessors, (14406), 14406 states have call successors, (14406) [2023-11-29 06:51:18,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61515 states to 61515 states and 98697 transitions. [2023-11-29 06:51:18,042 INFO L78 Accepts]: Start accepts. Automaton has 61515 states and 98697 transitions. Word has length 570 [2023-11-29 06:51:18,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:51:18,043 INFO L495 AbstractCegarLoop]: Abstraction has 61515 states and 98697 transitions. [2023-11-29 06:51:18,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:51:18,043 INFO L276 IsEmpty]: Start isEmpty. Operand 61515 states and 98697 transitions. [2023-11-29 06:51:18,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:51:18,075 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:51:18,076 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:51:18,082 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:51:18,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:51:18,276 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:51:18,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:18,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1677567851, now seen corresponding path program 1 times [2023-11-29 06:51:18,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:18,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649502160] [2023-11-29 06:51:18,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:18,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:18,319 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:51:18,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1288424153] [2023-11-29 06:51:18,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:18,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:51:18,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:51:18,321 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:51:18,325 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:51:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:18,899 INFO L262 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:51:18,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:51:19,100 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 6111 proven. 63 refuted. 0 times theorem prover too weak. 10570 trivial. 0 not checked. [2023-11-29 06:51:19,101 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:51:19,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 06:51:19,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:19,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649502160] [2023-11-29 06:51:19,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:51:19,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288424153] [2023-11-29 06:51:19,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288424153] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:51:19,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:51:19,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2023-11-29 06:51:19,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957203297] [2023-11-29 06:51:19,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:51:19,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:51:19,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:19,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:51:19,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:51:19,275 INFO L87 Difference]: Start difference. First operand 61515 states and 98697 transitions. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:51:25,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:51:25,174 INFO L93 Difference]: Finished difference Result 120169 states and 191706 transitions. [2023-11-29 06:51:25,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:51:25,175 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 570 [2023-11-29 06:51:25,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:51:25,315 INFO L225 Difference]: With dead ends: 120169 [2023-11-29 06:51:25,315 INFO L226 Difference]: Without dead ends: 58715 [2023-11-29 06:51:25,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1139 GetRequests, 1131 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2023-11-29 06:51:25,398 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 1 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 1143 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:51:25,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 1143 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:51:25,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58715 states. [2023-11-29 06:51:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58715 to 58715. [2023-11-29 06:51:31,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58715 states, 43541 states have (on average 1.4635630784777567) internal successors, (63725), 43978 states have internal predecessors, (63725), 14406 states have call successors, (14406), 767 states have call predecessors, (14406), 767 states have return successors, (14406), 13969 states have call predecessors, (14406), 14406 states have call successors, (14406) [2023-11-29 06:51:31,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58715 states to 58715 states and 92537 transitions. [2023-11-29 06:51:31,331 INFO L78 Accepts]: Start accepts. Automaton has 58715 states and 92537 transitions. Word has length 570 [2023-11-29 06:51:31,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:51:31,332 INFO L495 AbstractCegarLoop]: Abstraction has 58715 states and 92537 transitions. [2023-11-29 06:51:31,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:51:31,332 INFO L276 IsEmpty]: Start isEmpty. Operand 58715 states and 92537 transitions. [2023-11-29 06:51:31,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2023-11-29 06:51:31,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:51:31,355 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:51:31,362 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:51:31,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:51:31,556 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:51:31,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:51:31,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1868469570, now seen corresponding path program 1 times [2023-11-29 06:51:31,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:51:31,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971863746] [2023-11-29 06:51:31,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:31,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:51:31,603 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:51:31,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443624564] [2023-11-29 06:51:31,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:51:31,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:51:31,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:51:31,605 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:51:31,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:51:32,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:51:32,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 06:51:32,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:51:33,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 9860 proven. 201 refuted. 0 times theorem prover too weak. 6683 trivial. 0 not checked. [2023-11-29 06:51:33,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:51:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 339 proven. 204 refuted. 0 times theorem prover too weak. 16201 trivial. 0 not checked. [2023-11-29 06:51:36,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:51:36,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971863746] [2023-11-29 06:51:36,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:51:36,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443624564] [2023-11-29 06:51:36,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443624564] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:51:36,125 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:51:36,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 35 [2023-11-29 06:51:36,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821020837] [2023-11-29 06:51:36,126 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:51:36,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 06:51:36,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:51:36,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 06:51:36,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=985, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 06:51:36,130 INFO L87 Difference]: Start difference. First operand 58715 states and 92537 transitions. Second operand has 35 states, 35 states have (on average 5.428571428571429) internal successors, (190), 35 states have internal predecessors, (190), 6 states have call successors, (134), 4 states have call predecessors, (134), 8 states have return successors, (134), 6 states have call predecessors, (134), 6 states have call successors, (134) [2023-11-29 06:53:45,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:53:45,074 INFO L93 Difference]: Finished difference Result 636983 states and 989873 transitions. [2023-11-29 06:53:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 288 states. [2023-11-29 06:53:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.428571428571429) internal successors, (190), 35 states have internal predecessors, (190), 6 states have call successors, (134), 4 states have call predecessors, (134), 8 states have return successors, (134), 6 states have call predecessors, (134), 6 states have call successors, (134) Word has length 572 [2023-11-29 06:53:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:53:46,754 INFO L225 Difference]: With dead ends: 636983 [2023-11-29 06:53:46,754 INFO L226 Difference]: Without dead ends: 578329 [2023-11-29 06:53:47,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1476 GetRequests, 1163 SyntacticMatches, 0 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38497 ImplicationChecksByTransitivity, 22.5s TimeCoverageRelationStatistics Valid=17868, Invalid=81042, Unknown=0, NotChecked=0, Total=98910 [2023-11-29 06:53:47,143 INFO L413 NwaCegarLoop]: 843 mSDtfsCounter, 10634 mSDsluCounter, 11244 mSDsCounter, 0 mSdLazyCounter, 13225 mSolverCounterSat, 4245 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10746 SdHoareTripleChecker+Valid, 12087 SdHoareTripleChecker+Invalid, 17470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 4245 IncrementalHoareTripleChecker+Valid, 13225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.5s IncrementalHoareTripleChecker+Time [2023-11-29 06:53:47,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10746 Valid, 12087 Invalid, 17470 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [4245 Valid, 13225 Invalid, 0 Unknown, 0 Unchecked, 24.5s Time] [2023-11-29 06:53:47,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578329 states. [2023-11-29 06:54:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578329 to 84523. [2023-11-29 06:54:13,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84523 states, 64705 states have (on average 1.4765628622208484) internal successors, (95541), 65310 states have internal predecessors, (95541), 18726 states have call successors, (18726), 1091 states have call predecessors, (18726), 1091 states have return successors, (18726), 18121 states have call predecessors, (18726), 18726 states have call successors, (18726) [2023-11-29 06:54:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84523 states to 84523 states and 132993 transitions. [2023-11-29 06:54:13,576 INFO L78 Accepts]: Start accepts. Automaton has 84523 states and 132993 transitions. Word has length 572 [2023-11-29 06:54:13,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:54:13,577 INFO L495 AbstractCegarLoop]: Abstraction has 84523 states and 132993 transitions. [2023-11-29 06:54:13,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.428571428571429) internal successors, (190), 35 states have internal predecessors, (190), 6 states have call successors, (134), 4 states have call predecessors, (134), 8 states have return successors, (134), 6 states have call predecessors, (134), 6 states have call successors, (134) [2023-11-29 06:54:13,577 INFO L276 IsEmpty]: Start isEmpty. Operand 84523 states and 132993 transitions. [2023-11-29 06:54:13,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2023-11-29 06:54:13,613 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:54:13,614 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:54:13,621 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:54:13,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:54:13,815 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:54:13,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:54:13,815 INFO L85 PathProgramCache]: Analyzing trace with hash 1433896316, now seen corresponding path program 1 times [2023-11-29 06:54:13,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:54:13,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424094876] [2023-11-29 06:54:13,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:13,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:54:13,870 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:54:13,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680601699] [2023-11-29 06:54:13,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:54:13,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:54:13,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:54:13,872 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:54:13,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:54:14,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:54:14,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 06:54:14,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:54:14,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 06:54:14,293 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:54:14,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:54:14,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424094876] [2023-11-29 06:54:14,293 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:54:14,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680601699] [2023-11-29 06:54:14,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680601699] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:54:14,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:54:14,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:54:14,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528954680] [2023-11-29 06:54:14,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:54:14,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:54:14,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:54:14,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:54:14,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:54:14,296 INFO L87 Difference]: Start difference. First operand 84523 states and 132993 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:54:48,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:54:48,323 INFO L93 Difference]: Finished difference Result 238057 states and 376444 transitions. [2023-11-29 06:54:48,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:54:48,324 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 572 [2023-11-29 06:54:48,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:54:48,759 INFO L225 Difference]: With dead ends: 238057 [2023-11-29 06:54:48,760 INFO L226 Difference]: Without dead ends: 195825 [2023-11-29 06:54:48,856 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:54:48,857 INFO L413 NwaCegarLoop]: 936 mSDtfsCounter, 724 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 724 SdHoareTripleChecker+Valid, 2748 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:54:48,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [724 Valid, 2748 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:54:48,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195825 states. [2023-11-29 06:55:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195825 to 88891. [2023-11-29 06:55:07,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88891 states, 69073 states have (on average 1.496460266674388) internal successors, (103365), 69678 states have internal predecessors, (103365), 18726 states have call successors, (18726), 1091 states have call predecessors, (18726), 1091 states have return successors, (18726), 18121 states have call predecessors, (18726), 18726 states have call successors, (18726) [2023-11-29 06:55:07,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88891 states to 88891 states and 140817 transitions. [2023-11-29 06:55:07,428 INFO L78 Accepts]: Start accepts. Automaton has 88891 states and 140817 transitions. Word has length 572 [2023-11-29 06:55:07,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:55:07,429 INFO L495 AbstractCegarLoop]: Abstraction has 88891 states and 140817 transitions. [2023-11-29 06:55:07,429 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:55:07,429 INFO L276 IsEmpty]: Start isEmpty. Operand 88891 states and 140817 transitions. [2023-11-29 06:55:07,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2023-11-29 06:55:07,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:55:07,468 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:55:07,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:55:07,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:07,668 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:55:07,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:07,669 INFO L85 PathProgramCache]: Analyzing trace with hash -255047426, now seen corresponding path program 1 times [2023-11-29 06:55:07,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:07,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211749505] [2023-11-29 06:55:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:07,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:07,726 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:55:07,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574654623] [2023-11-29 06:55:07,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:07,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:07,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:07,727 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:07,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:55:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:08,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:55:08,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 06:55:08,213 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:55:08,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:08,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211749505] [2023-11-29 06:55:08,213 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:55:08,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574654623] [2023-11-29 06:55:08,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574654623] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:08,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:55:08,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:55:08,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687878784] [2023-11-29 06:55:08,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:08,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:55:08,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:08,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:55:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:55:08,216 INFO L87 Difference]: Start difference. First operand 88891 states and 140817 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:55:35,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:55:35,008 INFO L93 Difference]: Finished difference Result 204679 states and 323997 transitions. [2023-11-29 06:55:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:55:35,009 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 572 [2023-11-29 06:55:35,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:55:35,337 INFO L225 Difference]: With dead ends: 204679 [2023-11-29 06:55:35,337 INFO L226 Difference]: Without dead ends: 159091 [2023-11-29 06:55:35,421 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 569 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 06:55:35,421 INFO L413 NwaCegarLoop]: 539 mSDtfsCounter, 244 mSDsluCounter, 910 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 244 SdHoareTripleChecker+Valid, 1449 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:55:35,421 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [244 Valid, 1449 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:55:35,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159091 states. [2023-11-29 06:55:53,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159091 to 99775. [2023-11-29 06:55:53,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99775 states, 79957 states have (on average 1.5066223094913516) internal successors, (120465), 80562 states have internal predecessors, (120465), 18726 states have call successors, (18726), 1091 states have call predecessors, (18726), 1091 states have return successors, (18726), 18121 states have call predecessors, (18726), 18726 states have call successors, (18726) [2023-11-29 06:55:54,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99775 states to 99775 states and 157917 transitions. [2023-11-29 06:55:54,258 INFO L78 Accepts]: Start accepts. Automaton has 99775 states and 157917 transitions. Word has length 572 [2023-11-29 06:55:54,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:55:54,259 INFO L495 AbstractCegarLoop]: Abstraction has 99775 states and 157917 transitions. [2023-11-29 06:55:54,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:55:54,259 INFO L276 IsEmpty]: Start isEmpty. Operand 99775 states and 157917 transitions. [2023-11-29 06:55:54,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2023-11-29 06:55:54,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:55:54,302 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:55:54,309 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 06:55:54,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:55:54,503 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:55:54,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:55:54,503 INFO L85 PathProgramCache]: Analyzing trace with hash -230993408, now seen corresponding path program 1 times [2023-11-29 06:55:54,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:55:54,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746537990] [2023-11-29 06:55:54,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:54,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:55:54,553 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:55:54,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1943194620] [2023-11-29 06:55:54,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:55:54,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:55:54,553 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:55:54,554 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:55:54,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:55:54,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:55:54,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:55:54,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:55:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 06:55:54,951 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:55:54,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:55:54,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746537990] [2023-11-29 06:55:54,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:55:54,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943194620] [2023-11-29 06:55:54,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943194620] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:55:54,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:55:54,952 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:55:54,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865384509] [2023-11-29 06:55:54,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:55:54,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:55:54,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:55:54,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:55:54,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:55:54,955 INFO L87 Difference]: Start difference. First operand 99775 states and 157917 transitions. Second operand has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:56:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:56:36,726 INFO L93 Difference]: Finished difference Result 359414 states and 568278 transitions. [2023-11-29 06:56:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:56:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 572 [2023-11-29 06:56:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:56:37,240 INFO L225 Difference]: With dead ends: 359414 [2023-11-29 06:56:37,240 INFO L226 Difference]: Without dead ends: 259700 [2023-11-29 06:56:37,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 580 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:56:37,380 INFO L413 NwaCegarLoop]: 465 mSDtfsCounter, 1205 mSDsluCounter, 1638 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1205 SdHoareTripleChecker+Valid, 2103 SdHoareTripleChecker+Invalid, 894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:56:37,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1205 Valid, 2103 Invalid, 894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:56:37,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259700 states. [2023-11-29 06:56:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259700 to 99847. [2023-11-29 06:56:58,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99847 states, 80029 states have (on average 1.5067662972172589) internal successors, (120585), 80634 states have internal predecessors, (120585), 18726 states have call successors, (18726), 1091 states have call predecessors, (18726), 1091 states have return successors, (18726), 18121 states have call predecessors, (18726), 18726 states have call successors, (18726) [2023-11-29 06:56:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99847 states to 99847 states and 158037 transitions. [2023-11-29 06:56:58,649 INFO L78 Accepts]: Start accepts. Automaton has 99847 states and 158037 transitions. Word has length 572 [2023-11-29 06:56:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:56:58,650 INFO L495 AbstractCegarLoop]: Abstraction has 99847 states and 158037 transitions. [2023-11-29 06:56:58,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.166666666666668) internal successors, (115), 6 states have internal predecessors, (115), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 06:56:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand 99847 states and 158037 transitions. [2023-11-29 06:56:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2023-11-29 06:56:58,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:56:58,689 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:56:58,696 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:56:58,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:56:58,890 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:56:58,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:56:58,890 INFO L85 PathProgramCache]: Analyzing trace with hash -656992382, now seen corresponding path program 1 times [2023-11-29 06:56:58,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:56:58,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865724057] [2023-11-29 06:56:58,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:56:58,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:56:58,936 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:56:58,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1643982705] [2023-11-29 06:56:58,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:56:58,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:58,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:56:58,937 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:56:58,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:56:59,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:56:59,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 06:56:59,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:57:01,201 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 9410 proven. 201 refuted. 0 times theorem prover too weak. 7133 trivial. 0 not checked. [2023-11-29 06:57:01,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:57:02,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 339 proven. 204 refuted. 0 times theorem prover too weak. 16201 trivial. 0 not checked. [2023-11-29 06:57:02,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:57:02,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865724057] [2023-11-29 06:57:02,461 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:57:02,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643982705] [2023-11-29 06:57:02,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643982705] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:57:02,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:57:02,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2023-11-29 06:57:02,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703913256] [2023-11-29 06:57:02,462 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:57:02,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 06:57:02,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:57:02,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 06:57:02,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2023-11-29 06:57:02,465 INFO L87 Difference]: Start difference. First operand 99847 states and 158037 transitions. Second operand has 30 states, 30 states have (on average 7.666666666666667) internal successors, (230), 30 states have internal predecessors, (230), 6 states have call successors, (184), 4 states have call predecessors, (184), 8 states have return successors, (184), 6 states have call predecessors, (184), 6 states have call successors, (184) [2023-11-29 06:57:07,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:57:38,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:57:59,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:58:21,916 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:58:46,420 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 06:59:17,944 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 07:00:08,486 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.97s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 07:02:12,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:02:12,085 INFO L93 Difference]: Finished difference Result 1006428 states and 1570688 transitions. [2023-11-29 07:02:12,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2023-11-29 07:02:12,086 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 7.666666666666667) internal successors, (230), 30 states have internal predecessors, (230), 6 states have call successors, (184), 4 states have call predecessors, (184), 8 states have return successors, (184), 6 states have call predecessors, (184), 6 states have call successors, (184) Word has length 572 [2023-11-29 07:02:12,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:02:14,470 INFO L225 Difference]: With dead ends: 1006428 [2023-11-29 07:02:14,470 INFO L226 Difference]: Without dead ends: 906642 [2023-11-29 07:02:14,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1313 GetRequests, 1142 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9722 ImplicationChecksByTransitivity, 12.3s TimeCoverageRelationStatistics Valid=6575, Invalid=23181, Unknown=0, NotChecked=0, Total=29756 [2023-11-29 07:02:14,950 INFO L413 NwaCegarLoop]: 748 mSDtfsCounter, 6489 mSDsluCounter, 6825 mSDsCounter, 0 mSdLazyCounter, 8634 mSolverCounterSat, 3155 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 42.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6631 SdHoareTripleChecker+Valid, 7573 SdHoareTripleChecker+Invalid, 11790 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3155 IncrementalHoareTripleChecker+Valid, 8634 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 44.6s IncrementalHoareTripleChecker+Time [2023-11-29 07:02:14,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6631 Valid, 7573 Invalid, 11790 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3155 Valid, 8634 Invalid, 1 Unknown, 0 Unchecked, 44.6s Time] [2023-11-29 07:02:15,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906642 states. [2023-11-29 07:02:59,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906642 to 91352. [2023-11-29 07:02:59,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91352 states, 74922 states have (on average 1.5343957716024665) internal successors, (114960), 75395 states have internal predecessors, (114960), 15382 states have call successors, (15382), 1047 states have call predecessors, (15382), 1047 states have return successors, (15382), 14909 states have call predecessors, (15382), 15382 states have call successors, (15382) [2023-11-29 07:02:59,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91352 states to 91352 states and 145724 transitions. [2023-11-29 07:02:59,675 INFO L78 Accepts]: Start accepts. Automaton has 91352 states and 145724 transitions. Word has length 572 [2023-11-29 07:02:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:02:59,675 INFO L495 AbstractCegarLoop]: Abstraction has 91352 states and 145724 transitions. [2023-11-29 07:02:59,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 7.666666666666667) internal successors, (230), 30 states have internal predecessors, (230), 6 states have call successors, (184), 4 states have call predecessors, (184), 8 states have return successors, (184), 6 states have call predecessors, (184), 6 states have call successors, (184) [2023-11-29 07:02:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 91352 states and 145724 transitions. [2023-11-29 07:02:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2023-11-29 07:02:59,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:02:59,706 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:02:59,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 07:02:59,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 07:02:59,906 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:02:59,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:02:59,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1801169472, now seen corresponding path program 1 times [2023-11-29 07:02:59,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:02:59,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095345646] [2023-11-29 07:02:59,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:59,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:02:59,948 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:02:59,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200027674] [2023-11-29 07:02:59,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:02:59,948 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:02:59,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:02:59,949 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:02:59,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_12b2c067-1cfc-44e3-ae52-7b15f820531d/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 07:03:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:00,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 07:03:00,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:00,361 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 07:03:00,361 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:00,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:00,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095345646] [2023-11-29 07:03:00,362 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:00,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200027674] [2023-11-29 07:03:00,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200027674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:00,362 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:00,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:03:00,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264112473] [2023-11-29 07:03:00,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:00,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:03:00,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:00,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:03:00,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:03:00,365 INFO L87 Difference]: Start difference. First operand 91352 states and 145724 transitions. Second operand has 4 states, 4 states have (on average 28.75) internal successors, (115), 4 states have internal predecessors, (115), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92)