./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl --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 d7e06ec6fa537fe85bfdff5997d89760f89bf3ab66b37451471516c2ec0f2efb --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:33:17,308 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:33:17,394 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:33:17,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:33:17,400 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:33:17,440 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:33:17,440 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:33:17,441 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:33:17,442 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:33:17,442 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:33:17,443 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:33:17,450 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:33:17,451 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:33:17,456 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:33:17,457 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:33:17,457 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:33:17,458 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:33:17,459 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:33:17,460 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:33:17,460 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:33:17,461 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:33:17,461 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:33:17,462 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:33:17,462 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:33:17,463 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:33:17,464 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:33:17,464 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:33:17,465 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:33:17,465 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:33:17,466 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:33:17,467 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:33:17,468 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:33:17,468 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:33:17,468 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:33:17,468 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:33:17,469 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:33:17,469 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:33:17,469 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:33:17,470 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:33:17,470 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_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d7e06ec6fa537fe85bfdff5997d89760f89bf3ab66b37451471516c2ec0f2efb [2023-11-12 02:33:17,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:33:17,855 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:33:17,858 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:33:17,859 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:33:17,860 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:33:17,861 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i [2023-11-12 02:33:21,093 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:33:21,362 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:33:21,363 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i [2023-11-12 02:33:21,378 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/data/0b77e9cd3/ead985b55b0e45d4b9e670362821b90f/FLAGfb1399fab [2023-11-12 02:33:21,393 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/data/0b77e9cd3/ead985b55b0e45d4b9e670362821b90f [2023-11-12 02:33:21,397 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:33:21,398 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:33:21,400 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:33:21,400 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:33:21,407 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:33:21,408 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:21,409 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@300da02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21, skipping insertion in model container [2023-11-12 02:33:21,410 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:21,469 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:33:21,643 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_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i[916,929] [2023-11-12 02:33:21,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:33:21,847 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:33:21,870 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_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-17.i[916,929] [2023-11-12 02:33:21,941 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:33:21,963 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:33:21,964 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21 WrapperNode [2023-11-12 02:33:21,964 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:33:21,965 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:33:21,965 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:33:21,966 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:33:21,973 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:21,996 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,072 INFO L138 Inliner]: procedures = 26, calls = 100, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 662 [2023-11-12 02:33:22,075 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:33:22,075 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:33:22,076 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:33:22,076 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:33:22,086 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,087 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,096 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,097 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,129 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,147 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,153 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,171 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,180 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:33:22,181 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:33:22,181 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:33:22,181 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:33:22,182 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (1/1) ... [2023-11-12 02:33:22,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:33:22,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:22,223 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:33:22,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:33:22,277 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:33:22,277 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:33:22,278 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:33:22,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:33:22,278 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:33:22,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:33:22,472 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:33:22,474 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:33:23,553 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:33:23,565 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:33:23,565 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:33:23,568 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:23 BoogieIcfgContainer [2023-11-12 02:33:23,568 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:33:23,571 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:33:23,572 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:33:23,576 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:33:23,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:33:21" (1/3) ... [2023-11-12 02:33:23,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce97d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:23, skipping insertion in model container [2023-11-12 02:33:23,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:33:21" (2/3) ... [2023-11-12 02:33:23,578 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ce97d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:33:23, skipping insertion in model container [2023-11-12 02:33:23,578 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:33:23" (3/3) ... [2023-11-12 02:33:23,580 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-17.i [2023-11-12 02:33:23,603 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:33:23,604 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:33:23,673 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:33:23,681 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;@6b42c9d4, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:33:23,681 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:33:23,689 INFO L276 IsEmpty]: Start isEmpty. Operand has 262 states, 172 states have (on average 1.5872093023255813) internal successors, (273), 173 states have internal predecessors, (273), 87 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-12 02:33:23,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-12 02:33:23,737 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:23,739 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:23,739 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:23,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:23,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2094835868, now seen corresponding path program 1 times [2023-11-12 02:33:23,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:23,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372149701] [2023-11-12 02:33:23,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:23,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:24,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:24,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372149701] [2023-11-12 02:33:24,281 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:33:24,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560894680] [2023-11-12 02:33:24,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:24,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:24,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:24,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:24,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:33:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:24,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:33:24,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:24,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 172 proven. 0 refuted. 0 times theorem prover too weak. 14792 trivial. 0 not checked. [2023-11-12 02:33:24,930 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:24,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560894680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:24,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:24,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:33:24,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399895345] [2023-11-12 02:33:24,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:24,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:33:24,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:24,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:33:24,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:33:24,983 INFO L87 Difference]: Start difference. First operand has 262 states, 172 states have (on average 1.5872093023255813) internal successors, (273), 173 states have internal predecessors, (273), 87 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) Second operand has 2 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 2 states have call successors, (87) [2023-11-12 02:33:25,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:25,056 INFO L93 Difference]: Finished difference Result 515 states and 971 transitions. [2023-11-12 02:33:25,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:33:25,059 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 2 states have call successors, (87) Word has length 540 [2023-11-12 02:33:25,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:25,072 INFO L225 Difference]: With dead ends: 515 [2023-11-12 02:33:25,072 INFO L226 Difference]: Without dead ends: 256 [2023-11-12 02:33:25,080 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 539 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:33:25,084 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:25,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:33:25,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2023-11-12 02:33:25,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2023-11-12 02:33:25,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 167 states have (on average 1.562874251497006) internal successors, (261), 167 states have internal predecessors, (261), 87 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-12 02:33:25,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 435 transitions. [2023-11-12 02:33:25,214 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 435 transitions. Word has length 540 [2023-11-12 02:33:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:25,217 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 435 transitions. [2023-11-12 02:33:25,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 55.0) internal successors, (110), 2 states have internal predecessors, (110), 2 states have call successors, (87), 2 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 2 states have call successors, (87) [2023-11-12 02:33:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 435 transitions. [2023-11-12 02:33:25,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-12 02:33:25,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:25,241 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:25,255 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:25,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:33:25,450 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:25,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:25,451 INFO L85 PathProgramCache]: Analyzing trace with hash 999540249, now seen corresponding path program 1 times [2023-11-12 02:33:25,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:25,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563840456] [2023-11-12 02:33:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:25,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:25,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:25,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1519833238] [2023-11-12 02:33:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:25,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:25,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:25,595 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:25,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:33:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:26,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 1254 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:33:26,096 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:26,827 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 7568 proven. 129 refuted. 0 times theorem prover too weak. 7267 trivial. 0 not checked. [2023-11-12 02:33:26,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:27,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 129 proven. 129 refuted. 0 times theorem prover too weak. 14706 trivial. 0 not checked. [2023-11-12 02:33:27,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:27,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563840456] [2023-11-12 02:33:27,390 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:27,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519833238] [2023-11-12 02:33:27,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519833238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:27,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:33:27,392 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:33:27,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648895400] [2023-11-12 02:33:27,393 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:27,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:33:27,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:27,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:33:27,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:33:27,405 INFO L87 Difference]: Start difference. First operand 256 states and 435 transitions. Second operand has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 2 states have call predecessors, (131), 2 states have call successors, (131) [2023-11-12 02:33:28,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:28,074 INFO L93 Difference]: Finished difference Result 510 states and 860 transitions. [2023-11-12 02:33:28,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:33:28,075 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 2 states have call predecessors, (131), 2 states have call successors, (131) Word has length 540 [2023-11-12 02:33:28,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:28,088 INFO L225 Difference]: With dead ends: 510 [2023-11-12 02:33:28,089 INFO L226 Difference]: Without dead ends: 257 [2023-11-12 02:33:28,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1082 GetRequests, 1072 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:33:28,092 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 420 mSDsluCounter, 473 mSDsCounter, 0 mSdLazyCounter, 437 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 437 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:28,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 797 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 437 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:33:28,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-11-12 02:33:28,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 253. [2023-11-12 02:33:28,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 163 states have (on average 1.5153374233128833) internal successors, (247), 163 states have internal predecessors, (247), 87 states have call successors, (87), 2 states have call predecessors, (87), 2 states have return successors, (87), 87 states have call predecessors, (87), 87 states have call successors, (87) [2023-11-12 02:33:28,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 421 transitions. [2023-11-12 02:33:28,179 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 421 transitions. Word has length 540 [2023-11-12 02:33:28,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:28,182 INFO L495 AbstractCegarLoop]: Abstraction has 253 states and 421 transitions. [2023-11-12 02:33:28,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.714285714285715) internal successors, (117), 7 states have internal predecessors, (117), 2 states have call successors, (130), 2 states have call predecessors, (130), 4 states have return successors, (131), 2 states have call predecessors, (131), 2 states have call successors, (131) [2023-11-12 02:33:28,185 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 421 transitions. [2023-11-12 02:33:28,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-12 02:33:28,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:28,203 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:28,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:28,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:28,411 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:28,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:28,412 INFO L85 PathProgramCache]: Analyzing trace with hash -805898085, now seen corresponding path program 1 times [2023-11-12 02:33:28,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:28,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [733508006] [2023-11-12 02:33:28,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:28,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:28,605 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:28,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1357571480] [2023-11-12 02:33:28,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:28,610 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:28,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:28,613 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:28,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:33:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:29,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 1253 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-12 02:33:29,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:32,692 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 2984 proven. 459 refuted. 0 times theorem prover too weak. 11521 trivial. 0 not checked. [2023-11-12 02:33:32,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:34,603 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 51 proven. 462 refuted. 0 times theorem prover too weak. 14451 trivial. 0 not checked. [2023-11-12 02:33:34,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:34,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [733508006] [2023-11-12 02:33:34,604 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:34,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357571480] [2023-11-12 02:33:34,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357571480] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:34,605 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:33:34,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-12 02:33:34,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40300950] [2023-11-12 02:33:34,606 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:34,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-12 02:33:34,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:34,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-12 02:33:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:33:34,611 INFO L87 Difference]: Start difference. First operand 253 states and 421 transitions. Second operand has 18 states, 18 states have (on average 10.777777777777779) internal successors, (194), 18 states have internal predecessors, (194), 6 states have call successors, (174), 4 states have call predecessors, (174), 8 states have return successors, (174), 6 states have call predecessors, (174), 6 states have call successors, (174) [2023-11-12 02:33:37,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:37,212 INFO L93 Difference]: Finished difference Result 1115 states and 1803 transitions. [2023-11-12 02:33:37,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-12 02:33:37,213 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 10.777777777777779) internal successors, (194), 18 states have internal predecessors, (194), 6 states have call successors, (174), 4 states have call predecessors, (174), 8 states have return successors, (174), 6 states have call predecessors, (174), 6 states have call successors, (174) Word has length 540 [2023-11-12 02:33:37,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:37,223 INFO L225 Difference]: With dead ends: 1115 [2023-11-12 02:33:37,224 INFO L226 Difference]: Without dead ends: 865 [2023-11-12 02:33:37,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 1065 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=523, Invalid=1199, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 02:33:37,228 INFO L413 NwaCegarLoop]: 338 mSDtfsCounter, 2215 mSDsluCounter, 1462 mSDsCounter, 0 mSdLazyCounter, 1275 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2233 SdHoareTripleChecker+Valid, 1800 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 1275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:37,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2233 Valid, 1800 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 1275 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-12 02:33:37,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2023-11-12 02:33:37,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 801. [2023-11-12 02:33:37,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 568 states have (on average 1.5158450704225352) internal successors, (861), 573 states have internal predecessors, (861), 218 states have call successors, (218), 14 states have call predecessors, (218), 14 states have return successors, (218), 213 states have call predecessors, (218), 218 states have call successors, (218) [2023-11-12 02:33:37,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 1297 transitions. [2023-11-12 02:33:37,379 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 1297 transitions. Word has length 540 [2023-11-12 02:33:37,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:37,381 INFO L495 AbstractCegarLoop]: Abstraction has 801 states and 1297 transitions. [2023-11-12 02:33:37,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.777777777777779) internal successors, (194), 18 states have internal predecessors, (194), 6 states have call successors, (174), 4 states have call predecessors, (174), 8 states have return successors, (174), 6 states have call predecessors, (174), 6 states have call successors, (174) [2023-11-12 02:33:37,382 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 1297 transitions. [2023-11-12 02:33:37,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 541 [2023-11-12 02:33:37,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:37,388 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:37,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:37,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:37,598 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:37,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:37,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1064063523, now seen corresponding path program 1 times [2023-11-12 02:33:37,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:37,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399709511] [2023-11-12 02:33:37,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:37,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:37,715 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:37,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [484795406] [2023-11-12 02:33:37,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:37,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:37,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:37,717 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:37,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:33:38,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:38,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 1251 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:33:38,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:39,872 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-12 02:33:39,872 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:39,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:39,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399709511] [2023-11-12 02:33:39,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:39,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484795406] [2023-11-12 02:33:39,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484795406] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:39,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:39,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:33:39,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876908939] [2023-11-12 02:33:39,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:39,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:33:39,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:39,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:33:39,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:33:39,877 INFO L87 Difference]: Start difference. First operand 801 states and 1297 transitions. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-12 02:33:40,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:40,470 INFO L93 Difference]: Finished difference Result 1950 states and 3157 transitions. [2023-11-12 02:33:40,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:33:40,472 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 540 [2023-11-12 02:33:40,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:40,483 INFO L225 Difference]: With dead ends: 1950 [2023-11-12 02:33:40,484 INFO L226 Difference]: Without dead ends: 1165 [2023-11-12 02:33:40,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 535 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:33:40,488 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 480 mSDsluCounter, 1440 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 177 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 480 SdHoareTripleChecker+Valid, 1850 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 177 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:40,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [480 Valid, 1850 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [177 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:33:40,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1165 states. [2023-11-12 02:33:40,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1165 to 1067. [2023-11-12 02:33:40,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1067 states, 751 states have (on average 1.5312916111850865) internal successors, (1150), 755 states have internal predecessors, (1150), 297 states have call successors, (297), 18 states have call predecessors, (297), 18 states have return successors, (297), 293 states have call predecessors, (297), 297 states have call successors, (297) [2023-11-12 02:33:40,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1067 states to 1067 states and 1744 transitions. [2023-11-12 02:33:40,665 INFO L78 Accepts]: Start accepts. Automaton has 1067 states and 1744 transitions. Word has length 540 [2023-11-12 02:33:40,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:40,668 INFO L495 AbstractCegarLoop]: Abstraction has 1067 states and 1744 transitions. [2023-11-12 02:33:40,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 5 states have internal predecessors, (108), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-12 02:33:40,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1067 states and 1744 transitions. [2023-11-12 02:33:40,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-12 02:33:40,673 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:40,674 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:40,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:40,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:40,883 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:40,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:40,884 INFO L85 PathProgramCache]: Analyzing trace with hash 2062066707, now seen corresponding path program 1 times [2023-11-12 02:33:40,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:40,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131963606] [2023-11-12 02:33:40,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:40,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:40,961 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:40,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225052210] [2023-11-12 02:33:40,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:40,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:40,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:40,963 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:40,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:33:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:41,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 1255 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:33:41,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-12 02:33:42,169 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:42,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:42,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131963606] [2023-11-12 02:33:42,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:42,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225052210] [2023-11-12 02:33:42,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225052210] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:42,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:42,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:33:42,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872064445] [2023-11-12 02:33:42,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:42,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:33:42,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:42,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:33:42,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:33:42,187 INFO L87 Difference]: Start difference. First operand 1067 states and 1744 transitions. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-12 02:33:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:42,418 INFO L93 Difference]: Finished difference Result 2816 states and 4621 transitions. [2023-11-12 02:33:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:33:42,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 541 [2023-11-12 02:33:42,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:42,440 INFO L225 Difference]: With dead ends: 2816 [2023-11-12 02:33:42,440 INFO L226 Difference]: Without dead ends: 1959 [2023-11-12 02:33:42,444 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:33:42,446 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 184 mSDsluCounter, 815 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:42,446 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1226 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:33:42,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1959 states. [2023-11-12 02:33:42,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1959 to 1939. [2023-11-12 02:33:42,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1399 states have (on average 1.5389563974267333) internal successors, (2153), 1407 states have internal predecessors, (2153), 507 states have call successors, (507), 32 states have call predecessors, (507), 32 states have return successors, (507), 499 states have call predecessors, (507), 507 states have call successors, (507) [2023-11-12 02:33:42,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 3167 transitions. [2023-11-12 02:33:42,863 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 3167 transitions. Word has length 541 [2023-11-12 02:33:42,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:42,865 INFO L495 AbstractCegarLoop]: Abstraction has 1939 states and 3167 transitions. [2023-11-12 02:33:42,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 3 states have internal predecessors, (109), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-12 02:33:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 3167 transitions. [2023-11-12 02:33:42,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2023-11-12 02:33:42,871 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:42,871 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:42,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:43,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:43,080 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:43,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:43,081 INFO L85 PathProgramCache]: Analyzing trace with hash 1836410421, now seen corresponding path program 1 times [2023-11-12 02:33:43,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:43,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058723571] [2023-11-12 02:33:43,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:43,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:43,178 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:43,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1942498306] [2023-11-12 02:33:43,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:43,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:43,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:43,181 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:43,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:33:43,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:43,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 1256 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:33:43,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-12 02:33:44,388 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:44,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:44,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058723571] [2023-11-12 02:33:44,389 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:44,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942498306] [2023-11-12 02:33:44,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942498306] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:44,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:44,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:33:44,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80432915] [2023-11-12 02:33:44,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:44,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:33:44,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:44,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:33:44,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:33:44,393 INFO L87 Difference]: Start difference. First operand 1939 states and 3167 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-12 02:33:45,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:45,003 INFO L93 Difference]: Finished difference Result 4685 states and 7589 transitions. [2023-11-12 02:33:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:33:45,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 542 [2023-11-12 02:33:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:45,027 INFO L225 Difference]: With dead ends: 4685 [2023-11-12 02:33:45,027 INFO L226 Difference]: Without dead ends: 3081 [2023-11-12 02:33:45,033 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:33:45,034 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 361 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:45,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 799 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:33:45,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3081 states. [2023-11-12 02:33:45,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3081 to 3075. [2023-11-12 02:33:45,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3075 states, 2287 states have (on average 1.5308264101442939) internal successors, (3501), 2307 states have internal predecessors, (3501), 731 states have call successors, (731), 56 states have call predecessors, (731), 56 states have return successors, (731), 711 states have call predecessors, (731), 731 states have call successors, (731) [2023-11-12 02:33:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3075 states to 3075 states and 4963 transitions. [2023-11-12 02:33:45,462 INFO L78 Accepts]: Start accepts. Automaton has 3075 states and 4963 transitions. Word has length 542 [2023-11-12 02:33:45,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:45,464 INFO L495 AbstractCegarLoop]: Abstraction has 3075 states and 4963 transitions. [2023-11-12 02:33:45,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 3 states have internal predecessors, (110), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-12 02:33:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 3075 states and 4963 transitions. [2023-11-12 02:33:45,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2023-11-12 02:33:45,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:45,471 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:45,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-12 02:33:45,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-12 02:33:45,680 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:45,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:45,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2131651922, now seen corresponding path program 1 times [2023-11-12 02:33:45,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:45,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741015710] [2023-11-12 02:33:45,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:45,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:45,802 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:45,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433630651] [2023-11-12 02:33:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:45,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:45,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:45,804 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:45,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:33:46,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:46,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 1260 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:33:46,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-12 02:33:46,279 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:46,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:46,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741015710] [2023-11-12 02:33:46,280 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:46,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433630651] [2023-11-12 02:33:46,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433630651] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:46,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:46,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:33:46,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003856479] [2023-11-12 02:33:46,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:46,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:33:46,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:46,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:33:46,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:33:46,284 INFO L87 Difference]: Start difference. First operand 3075 states and 4963 transitions. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-12 02:33:46,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:46,810 INFO L93 Difference]: Finished difference Result 8345 states and 13392 transitions. [2023-11-12 02:33:46,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:33:46,811 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 542 [2023-11-12 02:33:46,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:46,854 INFO L225 Difference]: With dead ends: 8345 [2023-11-12 02:33:46,854 INFO L226 Difference]: Without dead ends: 5605 [2023-11-12 02:33:46,864 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:33:46,866 INFO L413 NwaCegarLoop]: 514 mSDtfsCounter, 300 mSDsluCounter, 901 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 300 SdHoareTripleChecker+Valid, 1415 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:46,866 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [300 Valid, 1415 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:33:46,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5605 states. [2023-11-12 02:33:47,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5605 to 5593. [2023-11-12 02:33:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5593 states, 4180 states have (on average 1.5205741626794258) internal successors, (6356), 4224 states have internal predecessors, (6356), 1303 states have call successors, (1303), 109 states have call predecessors, (1303), 109 states have return successors, (1303), 1259 states have call predecessors, (1303), 1303 states have call successors, (1303) [2023-11-12 02:33:47,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5593 states to 5593 states and 8962 transitions. [2023-11-12 02:33:47,721 INFO L78 Accepts]: Start accepts. Automaton has 5593 states and 8962 transitions. Word has length 542 [2023-11-12 02:33:47,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:47,722 INFO L495 AbstractCegarLoop]: Abstraction has 5593 states and 8962 transitions. [2023-11-12 02:33:47,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-12 02:33:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 5593 states and 8962 transitions. [2023-11-12 02:33:47,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2023-11-12 02:33:47,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:47,733 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:47,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:47,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:47,943 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:47,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:47,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1436910405, now seen corresponding path program 1 times [2023-11-12 02:33:47,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:47,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124392074] [2023-11-12 02:33:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:47,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:48,029 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:48,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1762062123] [2023-11-12 02:33:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:48,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:48,030 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:48,031 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:48,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:33:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:48,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 1261 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-12 02:33:48,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:50,492 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 7496 proven. 144 refuted. 0 times theorem prover too weak. 7324 trivial. 0 not checked. [2023-11-12 02:33:50,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:33:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 114 proven. 144 refuted. 0 times theorem prover too weak. 14706 trivial. 0 not checked. [2023-11-12 02:33:51,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:51,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124392074] [2023-11-12 02:33:51,493 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:51,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762062123] [2023-11-12 02:33:51,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1762062123] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:33:51,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:33:51,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-12 02:33:51,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850813024] [2023-11-12 02:33:51,495 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:33:51,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-12 02:33:51,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:51,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-12 02:33:51,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2023-11-12 02:33:51,498 INFO L87 Difference]: Start difference. First operand 5593 states and 8962 transitions. Second operand has 14 states, 13 states have (on average 16.153846153846153) internal successors, (210), 14 states have internal predecessors, (210), 6 states have call successors, (174), 4 states have call predecessors, (174), 5 states have return successors, (174), 4 states have call predecessors, (174), 6 states have call successors, (174) [2023-11-12 02:33:52,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:52,708 INFO L93 Difference]: Finished difference Result 10741 states and 17030 transitions. [2023-11-12 02:33:52,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-12 02:33:52,709 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 16.153846153846153) internal successors, (210), 14 states have internal predecessors, (210), 6 states have call successors, (174), 4 states have call predecessors, (174), 5 states have return successors, (174), 4 states have call predecessors, (174), 6 states have call successors, (174) Word has length 543 [2023-11-12 02:33:52,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:52,752 INFO L225 Difference]: With dead ends: 10741 [2023-11-12 02:33:52,752 INFO L226 Difference]: Without dead ends: 5845 [2023-11-12 02:33:52,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1090 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=242, Unknown=0, NotChecked=0, Total=380 [2023-11-12 02:33:52,770 INFO L413 NwaCegarLoop]: 310 mSDtfsCounter, 593 mSDsluCounter, 746 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:52,771 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [631 Valid, 1056 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-12 02:33:52,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5845 states. [2023-11-12 02:33:53,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5845 to 5629. [2023-11-12 02:33:53,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5629 states, 4207 states have (on average 1.5058236272878536) internal successors, (6335), 4251 states have internal predecessors, (6335), 1303 states have call successors, (1303), 118 states have call predecessors, (1303), 118 states have return successors, (1303), 1259 states have call predecessors, (1303), 1303 states have call successors, (1303) [2023-11-12 02:33:53,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5629 states to 5629 states and 8941 transitions. [2023-11-12 02:33:53,615 INFO L78 Accepts]: Start accepts. Automaton has 5629 states and 8941 transitions. Word has length 543 [2023-11-12 02:33:53,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:53,616 INFO L495 AbstractCegarLoop]: Abstraction has 5629 states and 8941 transitions. [2023-11-12 02:33:53,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 16.153846153846153) internal successors, (210), 14 states have internal predecessors, (210), 6 states have call successors, (174), 4 states have call predecessors, (174), 5 states have return successors, (174), 4 states have call predecessors, (174), 6 states have call successors, (174) [2023-11-12 02:33:53,616 INFO L276 IsEmpty]: Start isEmpty. Operand 5629 states and 8941 transitions. [2023-11-12 02:33:53,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2023-11-12 02:33:53,624 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:53,624 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:53,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:53,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:53,833 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:53,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:53,834 INFO L85 PathProgramCache]: Analyzing trace with hash 442304888, now seen corresponding path program 1 times [2023-11-12 02:33:53,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:53,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762573723] [2023-11-12 02:33:53,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:53,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:53,910 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:53,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [506890206] [2023-11-12 02:33:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:53,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:53,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:53,912 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:53,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:33:54,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:54,311 INFO L262 TraceCheckSpWp]: Trace formula consists of 1262 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:33:54,320 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:33:54,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14964 trivial. 0 not checked. [2023-11-12 02:33:54,392 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:33:54,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:33:54,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762573723] [2023-11-12 02:33:54,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:33:54,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506890206] [2023-11-12 02:33:54,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506890206] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:33:54,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:33:54,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:33:54,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900668652] [2023-11-12 02:33:54,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:33:54,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:33:54,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:33:54,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:33:54,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:54,396 INFO L87 Difference]: Start difference. First operand 5629 states and 8941 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-12 02:33:55,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:33:55,144 INFO L93 Difference]: Finished difference Result 15197 states and 24004 transitions. [2023-11-12 02:33:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:33:55,144 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) Word has length 544 [2023-11-12 02:33:55,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:33:55,215 INFO L225 Difference]: With dead ends: 15197 [2023-11-12 02:33:55,215 INFO L226 Difference]: Without dead ends: 10269 [2023-11-12 02:33:55,231 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 543 GetRequests, 542 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:33:55,234 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 214 mSDsluCounter, 395 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:33:55,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 800 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:33:55,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10269 states. [2023-11-12 02:33:56,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10269 to 10251. [2023-11-12 02:33:56,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10251 states, 7932 states have (on average 1.5143721633888048) internal successors, (12012), 8024 states have internal predecessors, (12012), 2103 states have call successors, (2103), 215 states have call predecessors, (2103), 215 states have return successors, (2103), 2011 states have call predecessors, (2103), 2103 states have call successors, (2103) [2023-11-12 02:33:56,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10251 states to 10251 states and 16218 transitions. [2023-11-12 02:33:56,384 INFO L78 Accepts]: Start accepts. Automaton has 10251 states and 16218 transitions. Word has length 544 [2023-11-12 02:33:56,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:33:56,386 INFO L495 AbstractCegarLoop]: Abstraction has 10251 states and 16218 transitions. [2023-11-12 02:33:56,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 1 states have call successors, (87), 1 states have call predecessors, (87), 1 states have return successors, (87), 1 states have call predecessors, (87), 1 states have call successors, (87) [2023-11-12 02:33:56,386 INFO L276 IsEmpty]: Start isEmpty. Operand 10251 states and 16218 transitions. [2023-11-12 02:33:56,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 546 [2023-11-12 02:33:56,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:33:56,399 INFO L195 NwaCegarLoop]: trace histogram [87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:33:56,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:33:56,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:56,609 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:33:56,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:33:56,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1263057270, now seen corresponding path program 1 times [2023-11-12 02:33:56,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:33:56,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783614252] [2023-11-12 02:33:56,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:56,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:33:56,692 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:33:56,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1554850079] [2023-11-12 02:33:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:33:56,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:33:56,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:33:56,694 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:33:56,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cd7d5c3a-648a-46e4-89d9-86bc563e1fd7/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:33:57,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:33:57,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 1263 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:33:57,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:34:00,755 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 7952 proven. 456 refuted. 0 times theorem prover too weak. 6556 trivial. 0 not checked. [2023-11-12 02:34:00,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:34:02,726 INFO L134 CoverageAnalysis]: Checked inductivity of 14964 backedges. 192 proven. 321 refuted. 0 times theorem prover too weak. 14451 trivial. 0 not checked. [2023-11-12 02:34:02,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:34:02,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783614252] [2023-11-12 02:34:02,727 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:34:02,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554850079] [2023-11-12 02:34:02,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554850079] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:34:02,728 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:34:02,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2023-11-12 02:34:02,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338452740] [2023-11-12 02:34:02,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:34:02,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-12 02:34:02,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:34:02,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-12 02:34:02,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2023-11-12 02:34:02,733 INFO L87 Difference]: Start difference. First operand 10251 states and 16218 transitions. Second operand has 22 states, 21 states have (on average 10.761904761904763) internal successors, (226), 20 states have internal predecessors, (226), 8 states have call successors, (174), 5 states have call predecessors, (174), 9 states have return successors, (174), 8 states have call predecessors, (174), 8 states have call successors, (174)