./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-91.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e7bb482b 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_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-91.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP --witnessprinter.witness.filename witness.graphml --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 4c96b2c0a4805af872684054e348cbdc2f3aecf564e5f15847ec776b279df9b4 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 23:09:29,389 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 23:09:29,463 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 23:09:29,469 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 23:09:29,470 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 23:09:29,498 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 23:09:29,498 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 23:09:29,499 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 23:09:29,500 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 23:09:29,500 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 23:09:29,501 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 23:09:29,502 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 23:09:29,503 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 23:09:29,503 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 23:09:29,504 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 23:09:29,504 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 23:09:29,505 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 23:09:29,505 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 23:09:29,506 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 23:09:29,506 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 23:09:29,507 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 23:09:29,508 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 23:09:29,508 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 23:09:29,509 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 23:09:29,509 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 23:09:29,510 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 23:09:29,510 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 23:09:29,510 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 23:09:29,511 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:09:29,511 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 23:09:29,512 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 23:09:29,512 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 23:09:29,512 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 23:09:29,513 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 23:09:29,513 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 23:09:29,513 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 23:09:29,514 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 23:09:29,514 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 23:09:29,514 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 23:09:29,514 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_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4c96b2c0a4805af872684054e348cbdc2f3aecf564e5f15847ec776b279df9b4 [2023-11-06 23:09:29,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 23:09:29,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 23:09:29,883 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 23:09:29,884 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 23:09:29,884 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 23:09:29,886 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-91.i [2023-11-06 23:09:33,004 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 23:09:33,366 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 23:09:33,367 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-91.i [2023-11-06 23:09:33,395 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/data/56c6a34ba/53051b4243364752921562bb03d32633/FLAG5645692bc [2023-11-06 23:09:33,414 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/data/56c6a34ba/53051b4243364752921562bb03d32633 [2023-11-06 23:09:33,418 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 23:09:33,419 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 23:09:33,421 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 23:09:33,421 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 23:09:33,428 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 23:09:33,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:33" (1/1) ... [2023-11-06 23:09:33,434 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ea92000 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:33, skipping insertion in model container [2023-11-06 23:09:33,434 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:09:33" (1/1) ... [2023-11-06 23:09:33,489 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 23:09:33,667 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_61c38969-2218-4731-b421-f243f33acfda/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-91.i[916,929] [2023-11-06 23:09:33,959 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:09:33,999 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 23:09:34,010 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_61c38969-2218-4731-b421-f243f33acfda/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-91.i[916,929] [2023-11-06 23:09:34,111 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 23:09:34,136 INFO L206 MainTranslator]: Completed translation [2023-11-06 23:09:34,136 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:34 WrapperNode [2023-11-06 23:09:34,137 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 23:09:34,138 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 23:09:34,138 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 23:09:34,138 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 23:09:34,146 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:34" (1/1) ... [2023-11-06 23:09:34,180 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:34" (1/1) ... [2023-11-06 23:09:34,344 INFO L138 Inliner]: procedures = 26, calls = 144, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 893 [2023-11-06 23:09:34,344 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 23:09:34,345 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 23:09:34,346 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 23:09:34,346 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 23:09:34,358 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:34" (1/1) ... [2023-11-06 23:09:34,359 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:34" (1/1) ... [2023-11-06 23:09:34,395 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:34" (1/1) ... [2023-11-06 23:09:34,396 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:34" (1/1) ... [2023-11-06 23:09:34,473 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:34" (1/1) ... [2023-11-06 23:09:34,507 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:34" (1/1) ... [2023-11-06 23:09:34,524 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:34" (1/1) ... [2023-11-06 23:09:34,534 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:34" (1/1) ... [2023-11-06 23:09:34,552 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 23:09:34,553 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 23:09:34,553 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 23:09:34,553 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 23:09:34,554 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:34" (1/1) ... [2023-11-06 23:09:34,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 23:09:34,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:34,589 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 23:09:34,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 23:09:34,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 23:09:34,638 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 23:09:34,638 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 23:09:34,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 23:09:34,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 23:09:34,639 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 23:09:34,860 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 23:09:34,862 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 23:09:36,306 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 23:09:36,330 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 23:09:36,330 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 23:09:36,334 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:09:36 BoogieIcfgContainer [2023-11-06 23:09:36,335 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 23:09:36,340 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 23:09:36,340 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 23:09:36,344 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 23:09:36,344 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:09:33" (1/3) ... [2023-11-06 23:09:36,345 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535e257e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:09:36, skipping insertion in model container [2023-11-06 23:09:36,346 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:09:34" (2/3) ... [2023-11-06 23:09:36,391 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@535e257e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:09:36, skipping insertion in model container [2023-11-06 23:09:36,392 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:09:36" (3/3) ... [2023-11-06 23:09:36,393 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-91.i [2023-11-06 23:09:36,421 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 23:09:36,422 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 23:09:36,523 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 23:09:36,532 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=LoopsAndPotentialCycles, 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;@7f76d4b0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 23:09:36,533 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 23:09:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand has 362 states, 228 states have (on average 1.5745614035087718) internal successors, (359), 229 states have internal predecessors, (359), 131 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2023-11-06 23:09:36,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2023-11-06 23:09:36,623 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:36,625 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:36,626 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:36,633 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:36,634 INFO L85 PathProgramCache]: Analyzing trace with hash -97489134, now seen corresponding path program 1 times [2023-11-06 23:09:36,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:36,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441875018] [2023-11-06 23:09:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:36,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:37,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:37,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441875018] [2023-11-06 23:09:37,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 23:09:37,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757196763] [2023-11-06 23:09:37,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:37,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:37,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:37,313 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:37,341 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 23:09:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:37,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 1931 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 23:09:38,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 260 proven. 0 refuted. 0 times theorem prover too weak. 33800 trivial. 0 not checked. [2023-11-06 23:09:38,208 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:38,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757196763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:38,210 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:38,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 23:09:38,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636584157] [2023-11-06 23:09:38,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:38,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 23:09:38,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:38,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 23:09:38,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:09:38,277 INFO L87 Difference]: Start difference. First operand has 362 states, 228 states have (on average 1.5745614035087718) internal successors, (359), 229 states have internal predecessors, (359), 131 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (131), 2 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 2 states have call successors, (131) [2023-11-06 23:09:38,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:38,381 INFO L93 Difference]: Finished difference Result 717 states and 1367 transitions. [2023-11-06 23:09:38,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 23:09:38,384 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (131), 2 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 2 states have call successors, (131) Word has length 819 [2023-11-06 23:09:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:38,403 INFO L225 Difference]: With dead ends: 717 [2023-11-06 23:09:38,403 INFO L226 Difference]: Without dead ends: 358 [2023-11-06 23:09:38,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 23:09:38,418 INFO L413 NwaCegarLoop]: 609 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, 609 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 [2023-11-06 23:09:38,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:38,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2023-11-06 23:09:38,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 358. [2023-11-06 23:09:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 225 states have (on average 1.5422222222222222) internal successors, (347), 225 states have internal predecessors, (347), 131 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 131 states have call predecessors, (131), 131 states have call successors, (131) [2023-11-06 23:09:38,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 609 transitions. [2023-11-06 23:09:38,611 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 609 transitions. Word has length 819 [2023-11-06 23:09:38,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:38,612 INFO L495 AbstractCegarLoop]: Abstraction has 358 states and 609 transitions. [2023-11-06 23:09:38,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (131), 2 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 2 states have call successors, (131) [2023-11-06 23:09:38,613 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 609 transitions. [2023-11-06 23:09:38,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2023-11-06 23:09:38,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:38,663 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:38,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:38,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-06 23:09:38,876 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:38,876 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:38,877 INFO L85 PathProgramCache]: Analyzing trace with hash 2004989028, now seen corresponding path program 1 times [2023-11-06 23:09:38,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:38,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470546266] [2023-11-06 23:09:38,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:38,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:39,205 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:09:39,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1031257901] [2023-11-06 23:09:39,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:39,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:39,207 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:39,208 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:39,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 23:09:39,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:39,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 1931 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:09:39,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:41,976 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2023-11-06 23:09:41,976 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:41,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:41,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470546266] [2023-11-06 23:09:41,977 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:09:41,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031257901] [2023-11-06 23:09:41,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031257901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:41,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:41,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:41,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623288151] [2023-11-06 23:09:41,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:41,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:09:41,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:41,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:09:41,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:41,985 INFO L87 Difference]: Start difference. First operand 358 states and 609 transitions. Second operand has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:42,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:42,664 INFO L93 Difference]: Finished difference Result 1275 states and 2164 transitions. [2023-11-06 23:09:42,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:09:42,667 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) Word has length 819 [2023-11-06 23:09:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:42,684 INFO L225 Difference]: With dead ends: 1275 [2023-11-06 23:09:42,685 INFO L226 Difference]: Without dead ends: 920 [2023-11-06 23:09:42,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 818 GetRequests, 816 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:09:42,689 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 558 mSDsluCounter, 1151 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 1755 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:42,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [558 Valid, 1755 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 23:09:42,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2023-11-06 23:09:42,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 915. [2023-11-06 23:09:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 915 states, 562 states have (on average 1.5231316725978647) internal successors, (856), 563 states have internal predecessors, (856), 349 states have call successors, (349), 3 states have call predecessors, (349), 3 states have return successors, (349), 348 states have call predecessors, (349), 349 states have call successors, (349) [2023-11-06 23:09:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 915 states to 915 states and 1554 transitions. [2023-11-06 23:09:42,922 INFO L78 Accepts]: Start accepts. Automaton has 915 states and 1554 transitions. Word has length 819 [2023-11-06 23:09:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:42,929 INFO L495 AbstractCegarLoop]: Abstraction has 915 states and 1554 transitions. [2023-11-06 23:09:42,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.75) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:42,931 INFO L276 IsEmpty]: Start isEmpty. Operand 915 states and 1554 transitions. [2023-11-06 23:09:42,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2023-11-06 23:09:42,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:42,944 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:42,958 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:43,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:43,158 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:43,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:43,159 INFO L85 PathProgramCache]: Analyzing trace with hash -834480538, now seen corresponding path program 1 times [2023-11-06 23:09:43,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:43,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942709854] [2023-11-06 23:09:43,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:43,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:43,283 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:09:43,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279514518] [2023-11-06 23:09:43,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:43,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:43,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:43,286 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:43,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 23:09:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:43,959 INFO L262 TraceCheckSpWp]: Trace formula consists of 1932 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:09:43,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2023-11-06 23:09:44,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:44,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:44,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942709854] [2023-11-06 23:09:44,181 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:09:44,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279514518] [2023-11-06 23:09:44,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279514518] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:44,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:44,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:44,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418660065] [2023-11-06 23:09:44,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:44,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:44,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:44,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:44,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:44,187 INFO L87 Difference]: Start difference. First operand 915 states and 1554 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:44,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:44,312 INFO L93 Difference]: Finished difference Result 2300 states and 3934 transitions. [2023-11-06 23:09:44,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:44,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) Word has length 820 [2023-11-06 23:09:44,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:44,336 INFO L225 Difference]: With dead ends: 2300 [2023-11-06 23:09:44,336 INFO L226 Difference]: Without dead ends: 1388 [2023-11-06 23:09:44,341 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:44,346 INFO L413 NwaCegarLoop]: 671 mSDtfsCounter, 254 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1269 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:44,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [254 Valid, 1269 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:44,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2023-11-06 23:09:44,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1383. [2023-11-06 23:09:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 955 states have (on average 1.6041884816753926) internal successors, (1532), 959 states have internal predecessors, (1532), 421 states have call successors, (421), 6 states have call predecessors, (421), 6 states have return successors, (421), 417 states have call predecessors, (421), 421 states have call successors, (421) [2023-11-06 23:09:44,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 2374 transitions. [2023-11-06 23:09:44,679 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 2374 transitions. Word has length 820 [2023-11-06 23:09:44,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:44,682 INFO L495 AbstractCegarLoop]: Abstraction has 1383 states and 2374 transitions. [2023-11-06 23:09:44,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:44,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 2374 transitions. [2023-11-06 23:09:44,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2023-11-06 23:09:44,694 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:44,695 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:44,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:44,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:44,905 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:44,906 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:44,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1872138856, now seen corresponding path program 1 times [2023-11-06 23:09:44,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:44,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393997973] [2023-11-06 23:09:44,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:44,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:45,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:09:45,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [608842365] [2023-11-06 23:09:45,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:45,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:45,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:45,048 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:45,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 23:09:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:45,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 1931 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:09:45,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:45,902 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2023-11-06 23:09:45,902 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:45,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:45,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393997973] [2023-11-06 23:09:45,903 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:09:45,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608842365] [2023-11-06 23:09:45,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608842365] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:45,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:45,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:45,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545079473] [2023-11-06 23:09:45,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:45,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:45,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:45,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:45,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:45,910 INFO L87 Difference]: Start difference. First operand 1383 states and 2374 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:46,118 INFO L93 Difference]: Finished difference Result 3689 states and 6339 transitions. [2023-11-06 23:09:46,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:46,119 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) Word has length 820 [2023-11-06 23:09:46,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:46,141 INFO L225 Difference]: With dead ends: 3689 [2023-11-06 23:09:46,141 INFO L226 Difference]: Without dead ends: 2309 [2023-11-06 23:09:46,151 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:46,158 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 306 mSDsluCounter, 590 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 1305 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:46,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 1305 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2309 states. [2023-11-06 23:09:46,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2309 to 2304. [2023-11-06 23:09:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2304 states, 1672 states have (on average 1.6208133971291867) internal successors, (2710), 1682 states have internal predecessors, (2710), 619 states have call successors, (619), 12 states have call predecessors, (619), 12 states have return successors, (619), 609 states have call predecessors, (619), 619 states have call successors, (619) [2023-11-06 23:09:46,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2304 states to 2304 states and 3948 transitions. [2023-11-06 23:09:46,486 INFO L78 Accepts]: Start accepts. Automaton has 2304 states and 3948 transitions. Word has length 820 [2023-11-06 23:09:46,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:46,487 INFO L495 AbstractCegarLoop]: Abstraction has 2304 states and 3948 transitions. [2023-11-06 23:09:46,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:46,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2304 states and 3948 transitions. [2023-11-06 23:09:46,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2023-11-06 23:09:46,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:46,502 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:46,518 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:46,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:46,713 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:46,714 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:46,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1862128662, now seen corresponding path program 1 times [2023-11-06 23:09:46,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:46,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234544537] [2023-11-06 23:09:46,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:46,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:46,856 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:09:46,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [92621578] [2023-11-06 23:09:46,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:46,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:46,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:46,859 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:46,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 23:09:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:47,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 1930 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:09:47,550 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:47,658 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2023-11-06 23:09:47,658 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:47,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:47,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234544537] [2023-11-06 23:09:47,660 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:09:47,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92621578] [2023-11-06 23:09:47,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92621578] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:47,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:47,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:47,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407501739] [2023-11-06 23:09:47,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:47,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:47,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:47,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:47,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:47,674 INFO L87 Difference]: Start difference. First operand 2304 states and 3948 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:47,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:47,990 INFO L93 Difference]: Finished difference Result 6810 states and 11654 transitions. [2023-11-06 23:09:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:47,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) Word has length 820 [2023-11-06 23:09:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:48,029 INFO L225 Difference]: With dead ends: 6810 [2023-11-06 23:09:48,030 INFO L226 Difference]: Without dead ends: 4509 [2023-11-06 23:09:48,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:48,040 INFO L413 NwaCegarLoop]: 664 mSDtfsCounter, 547 mSDsluCounter, 586 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 547 SdHoareTripleChecker+Valid, 1250 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:48,043 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [547 Valid, 1250 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4509 states. [2023-11-06 23:09:48,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4509 to 3174. [2023-11-06 23:09:48,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3174 states, 2542 states have (on average 1.6923682140047207) internal successors, (4302), 2552 states have internal predecessors, (4302), 619 states have call successors, (619), 12 states have call predecessors, (619), 12 states have return successors, (619), 609 states have call predecessors, (619), 619 states have call successors, (619) [2023-11-06 23:09:48,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 5540 transitions. [2023-11-06 23:09:48,511 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 5540 transitions. Word has length 820 [2023-11-06 23:09:48,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:48,513 INFO L495 AbstractCegarLoop]: Abstraction has 3174 states and 5540 transitions. [2023-11-06 23:09:48,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:48,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 5540 transitions. [2023-11-06 23:09:48,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2023-11-06 23:09:48,526 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:48,527 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:48,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:48,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:48,737 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:48,737 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:48,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1023095000, now seen corresponding path program 1 times [2023-11-06 23:09:48,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:48,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91884142] [2023-11-06 23:09:48,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:48,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:48,880 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:09:48,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037539939] [2023-11-06 23:09:48,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:48,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:48,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:48,883 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:48,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 23:09:49,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:49,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 1929 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:09:49,547 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:49,762 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2023-11-06 23:09:49,762 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:49,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:49,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91884142] [2023-11-06 23:09:49,763 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:09:49,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037539939] [2023-11-06 23:09:49,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037539939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:49,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:49,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:49,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356305225] [2023-11-06 23:09:49,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:49,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:49,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:49,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:49,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:49,768 INFO L87 Difference]: Start difference. First operand 3174 states and 5540 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:50,204 INFO L93 Difference]: Finished difference Result 7680 states and 13210 transitions. [2023-11-06 23:09:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:50,205 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) Word has length 820 [2023-11-06 23:09:50,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:50,246 INFO L225 Difference]: With dead ends: 7680 [2023-11-06 23:09:50,246 INFO L226 Difference]: Without dead ends: 4509 [2023-11-06 23:09:50,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:50,259 INFO L413 NwaCegarLoop]: 1078 mSDtfsCounter, 513 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 513 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:50,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [513 Valid, 1674 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:50,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4509 states. [2023-11-06 23:09:50,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4509 to 3174. [2023-11-06 23:09:50,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3174 states, 2542 states have (on average 1.6782061369000787) internal successors, (4266), 2552 states have internal predecessors, (4266), 619 states have call successors, (619), 12 states have call predecessors, (619), 12 states have return successors, (619), 609 states have call predecessors, (619), 619 states have call successors, (619) [2023-11-06 23:09:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3174 states to 3174 states and 5504 transitions. [2023-11-06 23:09:50,813 INFO L78 Accepts]: Start accepts. Automaton has 3174 states and 5504 transitions. Word has length 820 [2023-11-06 23:09:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:50,815 INFO L495 AbstractCegarLoop]: Abstraction has 3174 states and 5504 transitions. [2023-11-06 23:09:50,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:50,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3174 states and 5504 transitions. [2023-11-06 23:09:50,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2023-11-06 23:09:50,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:50,831 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:50,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:51,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-06 23:09:51,044 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:51,044 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:51,045 INFO L85 PathProgramCache]: Analyzing trace with hash -600393174, now seen corresponding path program 1 times [2023-11-06 23:09:51,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:51,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064380368] [2023-11-06 23:09:51,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:51,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:51,179 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:09:51,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [736360081] [2023-11-06 23:09:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:51,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:51,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:51,182 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:51,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 23:09:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:51,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 1928 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:09:51,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:52,046 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2023-11-06 23:09:52,047 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:52,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:52,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064380368] [2023-11-06 23:09:52,047 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:09:52,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736360081] [2023-11-06 23:09:52,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736360081] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:52,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:52,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:52,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091992238] [2023-11-06 23:09:52,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:52,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:52,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:52,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:52,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:52,053 INFO L87 Difference]: Start difference. First operand 3174 states and 5504 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:52,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:52,415 INFO L93 Difference]: Finished difference Result 8967 states and 15584 transitions. [2023-11-06 23:09:52,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:52,429 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) Word has length 820 [2023-11-06 23:09:52,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:52,486 INFO L225 Difference]: With dead ends: 8967 [2023-11-06 23:09:52,487 INFO L226 Difference]: Without dead ends: 5796 [2023-11-06 23:09:52,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:52,499 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 268 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 268 SdHoareTripleChecker+Valid, 1279 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 [2023-11-06 23:09:52,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [268 Valid, 1279 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5796 states. [2023-11-06 23:09:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5796 to 5788. [2023-11-06 23:09:53,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5788 states, 4820 states have (on average 1.6892116182572614) internal successors, (8142), 4842 states have internal predecessors, (8142), 943 states have call successors, (943), 24 states have call predecessors, (943), 24 states have return successors, (943), 921 states have call predecessors, (943), 943 states have call successors, (943) [2023-11-06 23:09:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5788 states to 5788 states and 10028 transitions. [2023-11-06 23:09:53,035 INFO L78 Accepts]: Start accepts. Automaton has 5788 states and 10028 transitions. Word has length 820 [2023-11-06 23:09:53,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:53,037 INFO L495 AbstractCegarLoop]: Abstraction has 5788 states and 10028 transitions. [2023-11-06 23:09:53,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:53,038 INFO L276 IsEmpty]: Start isEmpty. Operand 5788 states and 10028 transitions. [2023-11-06 23:09:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2023-11-06 23:09:53,060 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:53,061 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:53,085 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-06 23:09:53,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:53,271 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:53,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:53,272 INFO L85 PathProgramCache]: Analyzing trace with hash -573327572, now seen corresponding path program 1 times [2023-11-06 23:09:53,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:53,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785359743] [2023-11-06 23:09:53,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:53,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:53,389 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:09:53,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063910689] [2023-11-06 23:09:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:53,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:53,391 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:53,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 23:09:54,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:54,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 1927 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:09:54,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2023-11-06 23:09:54,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:54,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:54,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785359743] [2023-11-06 23:09:54,364 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:09:54,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063910689] [2023-11-06 23:09:54,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063910689] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:54,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:54,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:54,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32418276] [2023-11-06 23:09:54,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:54,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:54,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:54,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:54,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:54,369 INFO L87 Difference]: Start difference. First operand 5788 states and 10028 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:54,975 INFO L93 Difference]: Finished difference Result 11605 states and 20078 transitions. [2023-11-06 23:09:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:54,976 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) Word has length 820 [2023-11-06 23:09:54,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:55,031 INFO L225 Difference]: With dead ends: 11605 [2023-11-06 23:09:55,032 INFO L226 Difference]: Without dead ends: 5820 [2023-11-06 23:09:55,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:55,055 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 263 mSDsluCounter, 589 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1358 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:55,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1358 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:09:55,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2023-11-06 23:09:55,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 4810. [2023-11-06 23:09:55,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4810 states, 4172 states have (on average 1.7075743048897412) internal successors, (7124), 4182 states have internal predecessors, (7124), 619 states have call successors, (619), 18 states have call predecessors, (619), 18 states have return successors, (619), 609 states have call predecessors, (619), 619 states have call successors, (619) [2023-11-06 23:09:55,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4810 states to 4810 states and 8362 transitions. [2023-11-06 23:09:55,587 INFO L78 Accepts]: Start accepts. Automaton has 4810 states and 8362 transitions. Word has length 820 [2023-11-06 23:09:55,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:55,589 INFO L495 AbstractCegarLoop]: Abstraction has 4810 states and 8362 transitions. [2023-11-06 23:09:55,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:55,590 INFO L276 IsEmpty]: Start isEmpty. Operand 4810 states and 8362 transitions. [2023-11-06 23:09:55,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2023-11-06 23:09:55,609 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:55,610 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:55,627 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:55,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:55,822 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:55,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:55,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1349900462, now seen corresponding path program 1 times [2023-11-06 23:09:55,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:55,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609875810] [2023-11-06 23:09:55,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:55,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:55,948 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:09:55,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [672567448] [2023-11-06 23:09:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:55,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:55,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:55,950 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:55,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 23:09:56,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:56,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 1928 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:09:56,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:56,888 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2023-11-06 23:09:56,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:56,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:56,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609875810] [2023-11-06 23:09:56,889 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:09:56,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672567448] [2023-11-06 23:09:56,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672567448] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:56,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:56,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:56,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881199618] [2023-11-06 23:09:56,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:56,894 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:56,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:56,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:56,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:56,896 INFO L87 Difference]: Start difference. First operand 4810 states and 8362 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:57,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:09:57,372 INFO L93 Difference]: Finished difference Result 14424 states and 25080 transitions. [2023-11-06 23:09:57,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:09:57,373 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) Word has length 820 [2023-11-06 23:09:57,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:09:57,414 INFO L225 Difference]: With dead ends: 14424 [2023-11-06 23:09:57,414 INFO L226 Difference]: Without dead ends: 9617 [2023-11-06 23:09:57,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:57,434 INFO L413 NwaCegarLoop]: 606 mSDtfsCounter, 603 mSDsluCounter, 599 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1205 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:09:57,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 1205 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:09:57,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9617 states. [2023-11-06 23:09:58,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9617 to 9583. [2023-11-06 23:09:58,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9583 states, 8308 states have (on average 1.7019740009629274) internal successors, (14140), 8328 states have internal predecessors, (14140), 1238 states have call successors, (1238), 36 states have call predecessors, (1238), 36 states have return successors, (1238), 1218 states have call predecessors, (1238), 1238 states have call successors, (1238) [2023-11-06 23:09:58,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9583 states to 9583 states and 16616 transitions. [2023-11-06 23:09:58,300 INFO L78 Accepts]: Start accepts. Automaton has 9583 states and 16616 transitions. Word has length 820 [2023-11-06 23:09:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:09:58,302 INFO L495 AbstractCegarLoop]: Abstraction has 9583 states and 16616 transitions. [2023-11-06 23:09:58,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:09:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 9583 states and 16616 transitions. [2023-11-06 23:09:58,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 821 [2023-11-06 23:09:58,329 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:09:58,329 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:09:58,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 23:09:58,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:58,541 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:09:58,541 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:09:58,542 INFO L85 PathProgramCache]: Analyzing trace with hash -236683154, now seen corresponding path program 1 times [2023-11-06 23:09:58,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:09:58,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394430566] [2023-11-06 23:09:58,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:58,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:09:58,672 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:09:58,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252842911] [2023-11-06 23:09:58,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:09:58,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:09:58,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:09:58,674 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:09:58,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 23:09:59,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:09:59,671 INFO L262 TraceCheckSpWp]: Trace formula consists of 1926 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 23:09:59,699 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:09:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2023-11-06 23:09:59,758 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:09:59,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:09:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394430566] [2023-11-06 23:09:59,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:09:59,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252842911] [2023-11-06 23:09:59,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252842911] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:09:59,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:09:59,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 23:09:59,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54431815] [2023-11-06 23:09:59,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:09:59,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 23:09:59,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:09:59,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 23:09:59,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:09:59,765 INFO L87 Difference]: Start difference. First operand 9583 states and 16616 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:10:00,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:00,877 INFO L93 Difference]: Finished difference Result 28671 states and 49698 transitions. [2023-11-06 23:10:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 23:10:00,878 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) Word has length 820 [2023-11-06 23:10:00,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:00,958 INFO L225 Difference]: With dead ends: 28671 [2023-11-06 23:10:00,959 INFO L226 Difference]: Without dead ends: 19091 [2023-11-06 23:10:00,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 819 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 23:10:00,994 INFO L413 NwaCegarLoop]: 1204 mSDtfsCounter, 599 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 1802 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:00,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [599 Valid, 1802 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 23:10:01,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19091 states. [2023-11-06 23:10:02,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19091 to 9631. [2023-11-06 23:10:02,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9631 states, 8356 states have (on average 1.6979415988511248) internal successors, (14188), 8376 states have internal predecessors, (14188), 1238 states have call successors, (1238), 36 states have call predecessors, (1238), 36 states have return successors, (1238), 1218 states have call predecessors, (1238), 1238 states have call successors, (1238) [2023-11-06 23:10:02,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9631 states to 9631 states and 16664 transitions. [2023-11-06 23:10:02,437 INFO L78 Accepts]: Start accepts. Automaton has 9631 states and 16664 transitions. Word has length 820 [2023-11-06 23:10:02,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:02,439 INFO L495 AbstractCegarLoop]: Abstraction has 9631 states and 16664 transitions. [2023-11-06 23:10:02,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:10:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 9631 states and 16664 transitions. [2023-11-06 23:10:02,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2023-11-06 23:10:02,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:02,465 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:02,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:02,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:02,678 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:02,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:02,678 INFO L85 PathProgramCache]: Analyzing trace with hash -2123528424, now seen corresponding path program 1 times [2023-11-06 23:10:02,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:02,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526382462] [2023-11-06 23:10:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:02,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:02,807 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:02,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [643164540] [2023-11-06 23:10:02,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:02,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:02,808 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:02,809 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:02,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 23:10:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:03,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 1926 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:10:03,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:03,796 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2023-11-06 23:10:03,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:03,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:03,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526382462] [2023-11-06 23:10:03,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:03,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643164540] [2023-11-06 23:10:03,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [643164540] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:03,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:03,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:10:03,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970963882] [2023-11-06 23:10:03,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:03,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:10:03,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:03,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:10:03,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:10:03,802 INFO L87 Difference]: Start difference. First operand 9631 states and 16664 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:10:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:04,927 INFO L93 Difference]: Finished difference Result 25949 states and 44578 transitions. [2023-11-06 23:10:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 23:10:04,928 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) Word has length 821 [2023-11-06 23:10:04,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:04,981 INFO L225 Difference]: With dead ends: 25949 [2023-11-06 23:10:04,981 INFO L226 Difference]: Without dead ends: 16321 [2023-11-06 23:10:05,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 821 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-06 23:10:05,007 INFO L413 NwaCegarLoop]: 723 mSDtfsCounter, 279 mSDsluCounter, 1296 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 2019 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:05,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 2019 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 23:10:05,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16321 states. [2023-11-06 23:10:06,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16321 to 16249. [2023-11-06 23:10:06,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16249 states, 14110 states have (on average 1.6602409638554216) internal successors, (23426), 14154 states have internal predecessors, (23426), 2066 states have call successors, (2066), 72 states have call predecessors, (2066), 72 states have return successors, (2066), 2022 states have call predecessors, (2066), 2066 states have call successors, (2066) [2023-11-06 23:10:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16249 states to 16249 states and 27558 transitions. [2023-11-06 23:10:06,303 INFO L78 Accepts]: Start accepts. Automaton has 16249 states and 27558 transitions. Word has length 821 [2023-11-06 23:10:06,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:06,305 INFO L495 AbstractCegarLoop]: Abstraction has 16249 states and 27558 transitions. [2023-11-06 23:10:06,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:10:06,305 INFO L276 IsEmpty]: Start isEmpty. Operand 16249 states and 27558 transitions. [2023-11-06 23:10:06,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2023-11-06 23:10:06,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:06,346 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:06,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:06,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-06 23:10:06,558 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:06,559 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:06,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1562828646, now seen corresponding path program 1 times [2023-11-06 23:10:06,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:06,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695426370] [2023-11-06 23:10:06,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:06,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:06,687 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:06,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2054296207] [2023-11-06 23:10:06,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:06,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:06,688 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:06,689 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:06,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 23:10:07,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:07,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 1924 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 23:10:07,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2023-11-06 23:10:07,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:10:07,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:07,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695426370] [2023-11-06 23:10:07,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:07,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054296207] [2023-11-06 23:10:07,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2054296207] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:10:07,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:10:07,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 23:10:07,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001550128] [2023-11-06 23:10:07,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:10:07,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 23:10:07,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:07,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 23:10:07,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:10:07,760 INFO L87 Difference]: Start difference. First operand 16249 states and 27558 transitions. Second operand has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:10:10,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:10,662 INFO L93 Difference]: Finished difference Result 58439 states and 98255 transitions. [2023-11-06 23:10:10,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 23:10:10,663 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) Word has length 821 [2023-11-06 23:10:10,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:10,830 INFO L225 Difference]: With dead ends: 58439 [2023-11-06 23:10:10,830 INFO L226 Difference]: Without dead ends: 42193 [2023-11-06 23:10:10,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 820 GetRequests, 818 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 23:10:10,871 INFO L413 NwaCegarLoop]: 709 mSDtfsCounter, 604 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1465 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:10,871 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 1465 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-06 23:10:10,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42193 states. [2023-11-06 23:10:12,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42193 to 19225. [2023-11-06 23:10:12,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19225 states, 17086 states have (on average 1.6857075968629287) internal successors, (28802), 17130 states have internal predecessors, (28802), 2066 states have call successors, (2066), 72 states have call predecessors, (2066), 72 states have return successors, (2066), 2022 states have call predecessors, (2066), 2066 states have call successors, (2066) [2023-11-06 23:10:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19225 states to 19225 states and 32934 transitions. [2023-11-06 23:10:12,864 INFO L78 Accepts]: Start accepts. Automaton has 19225 states and 32934 transitions. Word has length 821 [2023-11-06 23:10:12,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:12,868 INFO L495 AbstractCegarLoop]: Abstraction has 19225 states and 32934 transitions. [2023-11-06 23:10:12,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.25) internal successors, (169), 4 states have internal predecessors, (169), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:10:12,868 INFO L276 IsEmpty]: Start isEmpty. Operand 19225 states and 32934 transitions. [2023-11-06 23:10:12,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2023-11-06 23:10:12,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:12,934 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:12,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:13,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:13,146 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:13,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:13,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1522153896, now seen corresponding path program 1 times [2023-11-06 23:10:13,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:13,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846099495] [2023-11-06 23:10:13,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:13,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:13,260 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:13,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [54612502] [2023-11-06 23:10:13,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:13,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:13,261 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:13,263 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:13,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 23:10:14,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:14,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 1924 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:10:14,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:15,880 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 12190 proven. 300 refuted. 0 times theorem prover too weak. 21570 trivial. 0 not checked. [2023-11-06 23:10:15,880 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:16,747 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 90 proven. 300 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2023-11-06 23:10:16,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:16,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846099495] [2023-11-06 23:10:16,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:16,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54612502] [2023-11-06 23:10:16,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54612502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:16,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:16,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:10:16,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257683118] [2023-11-06 23:10:16,753 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:16,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:10:16,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:16,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:10:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:10:16,758 INFO L87 Difference]: Start difference. First operand 19225 states and 32934 transitions. Second operand has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (231), 2 states have call predecessors, (231), 4 states have return successors, (232), 2 states have call predecessors, (232), 2 states have call successors, (232) [2023-11-06 23:10:19,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:19,128 INFO L93 Difference]: Finished difference Result 31957 states and 54212 transitions. [2023-11-06 23:10:19,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:10:19,129 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (231), 2 states have call predecessors, (231), 4 states have return successors, (232), 2 states have call predecessors, (232), 2 states have call successors, (232) Word has length 821 [2023-11-06 23:10:19,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:19,168 INFO L225 Difference]: With dead ends: 31957 [2023-11-06 23:10:19,168 INFO L226 Difference]: Without dead ends: 12735 [2023-11-06 23:10:19,190 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1644 GetRequests, 1634 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:10:19,192 INFO L413 NwaCegarLoop]: 513 mSDtfsCounter, 574 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 831 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 604 SdHoareTripleChecker+Valid, 1209 SdHoareTripleChecker+Invalid, 910 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:19,192 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [604 Valid, 1209 Invalid, 910 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 831 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 23:10:19,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12735 states. [2023-11-06 23:10:20,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12735 to 12537. [2023-11-06 23:10:20,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12537 states, 10374 states have (on average 1.6296510507036823) internal successors, (16906), 10418 states have internal predecessors, (16906), 2066 states have call successors, (2066), 96 states have call predecessors, (2066), 96 states have return successors, (2066), 2022 states have call predecessors, (2066), 2066 states have call successors, (2066) [2023-11-06 23:10:20,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12537 states to 12537 states and 21038 transitions. [2023-11-06 23:10:20,685 INFO L78 Accepts]: Start accepts. Automaton has 12537 states and 21038 transitions. Word has length 821 [2023-11-06 23:10:20,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:20,687 INFO L495 AbstractCegarLoop]: Abstraction has 12537 states and 21038 transitions. [2023-11-06 23:10:20,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.428571428571427) internal successors, (178), 7 states have internal predecessors, (178), 2 states have call successors, (231), 2 states have call predecessors, (231), 4 states have return successors, (232), 2 states have call predecessors, (232), 2 states have call successors, (232) [2023-11-06 23:10:20,687 INFO L276 IsEmpty]: Start isEmpty. Operand 12537 states and 21038 transitions. [2023-11-06 23:10:20,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 823 [2023-11-06 23:10:20,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:20,712 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:20,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:20,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:20,922 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:20,922 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:20,922 INFO L85 PathProgramCache]: Analyzing trace with hash 731886799, now seen corresponding path program 1 times [2023-11-06 23:10:20,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:20,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375207396] [2023-11-06 23:10:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:20,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:21,195 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:21,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [677277504] [2023-11-06 23:10:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:21,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:21,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:21,197 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:21,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 23:10:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:22,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 1926 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:10:22,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:23,375 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 14998 proven. 264 refuted. 0 times theorem prover too weak. 18798 trivial. 0 not checked. [2023-11-06 23:10:23,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:24,128 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 126 proven. 264 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2023-11-06 23:10:24,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:24,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375207396] [2023-11-06 23:10:24,129 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:24,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677277504] [2023-11-06 23:10:24,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [677277504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:24,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:24,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:10:24,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953355064] [2023-11-06 23:10:24,131 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:24,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:10:24,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:24,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:10:24,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:10:24,136 INFO L87 Difference]: Start difference. First operand 12537 states and 21038 transitions. Second operand has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 2 states have call successors, (219), 2 states have call predecessors, (219), 4 states have return successors, (220), 2 states have call predecessors, (220), 2 states have call successors, (220) [2023-11-06 23:10:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:25,686 INFO L93 Difference]: Finished difference Result 19459 states and 32645 transitions. [2023-11-06 23:10:25,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:10:25,687 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 2 states have call successors, (219), 2 states have call predecessors, (219), 4 states have return successors, (220), 2 states have call predecessors, (220), 2 states have call successors, (220) Word has length 822 [2023-11-06 23:10:25,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:25,713 INFO L225 Difference]: With dead ends: 19459 [2023-11-06 23:10:25,714 INFO L226 Difference]: Without dead ends: 6925 [2023-11-06 23:10:25,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1646 GetRequests, 1636 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:10:25,734 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 320 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 1113 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:25,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 1113 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 23:10:25,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6925 states. [2023-11-06 23:10:26,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6925 to 6853. [2023-11-06 23:10:26,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6853 states, 5518 states have (on average 1.6031170714026821) internal successors, (8846), 5538 states have internal predecessors, (8846), 1274 states have call successors, (1274), 60 states have call predecessors, (1274), 60 states have return successors, (1274), 1254 states have call predecessors, (1274), 1274 states have call successors, (1274) [2023-11-06 23:10:26,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6853 states to 6853 states and 11394 transitions. [2023-11-06 23:10:26,773 INFO L78 Accepts]: Start accepts. Automaton has 6853 states and 11394 transitions. Word has length 822 [2023-11-06 23:10:26,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:26,777 INFO L495 AbstractCegarLoop]: Abstraction has 6853 states and 11394 transitions. [2023-11-06 23:10:26,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.571428571428573) internal successors, (179), 7 states have internal predecessors, (179), 2 states have call successors, (219), 2 states have call predecessors, (219), 4 states have return successors, (220), 2 states have call predecessors, (220), 2 states have call successors, (220) [2023-11-06 23:10:26,777 INFO L276 IsEmpty]: Start isEmpty. Operand 6853 states and 11394 transitions. [2023-11-06 23:10:26,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 826 [2023-11-06 23:10:26,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:26,799 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:26,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:27,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:27,009 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:27,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:27,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1816984487, now seen corresponding path program 1 times [2023-11-06 23:10:27,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:27,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564957623] [2023-11-06 23:10:27,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:27,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:27,128 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:27,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [999053242] [2023-11-06 23:10:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:27,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:27,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:27,130 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:27,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 23:10:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:27,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 1934 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:10:27,999 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:28,931 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 17154 proven. 198 refuted. 0 times theorem prover too weak. 16708 trivial. 0 not checked. [2023-11-06 23:10:28,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:29,796 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 192 proven. 198 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2023-11-06 23:10:29,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:29,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564957623] [2023-11-06 23:10:29,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:29,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999053242] [2023-11-06 23:10:29,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999053242] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:29,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:29,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-06 23:10:29,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199251303] [2023-11-06 23:10:29,799 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:29,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:10:29,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:29,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:10:29,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:10:29,804 INFO L87 Difference]: Start difference. First operand 6853 states and 11394 transitions. Second operand has 8 states, 8 states have (on average 37.25) internal successors, (298), 8 states have internal predecessors, (298), 3 states have call successors, (197), 2 states have call predecessors, (197), 4 states have return successors, (198), 3 states have call predecessors, (198), 3 states have call successors, (198) [2023-11-06 23:10:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:31,088 INFO L93 Difference]: Finished difference Result 13799 states and 22875 transitions. [2023-11-06 23:10:31,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 23:10:31,090 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 37.25) internal successors, (298), 8 states have internal predecessors, (298), 3 states have call successors, (197), 2 states have call predecessors, (197), 4 states have return successors, (198), 3 states have call predecessors, (198), 3 states have call successors, (198) Word has length 825 [2023-11-06 23:10:31,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:31,111 INFO L225 Difference]: With dead ends: 13799 [2023-11-06 23:10:31,112 INFO L226 Difference]: Without dead ends: 6949 [2023-11-06 23:10:31,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1652 GetRequests, 1642 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-06 23:10:31,126 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 286 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:31,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 1111 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 23:10:31,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6949 states. [2023-11-06 23:10:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6949 to 6877. [2023-11-06 23:10:31,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6877 states, 5536 states have (on average 1.596820809248555) internal successors, (8840), 5556 states have internal predecessors, (8840), 1274 states have call successors, (1274), 66 states have call predecessors, (1274), 66 states have return successors, (1274), 1254 states have call predecessors, (1274), 1274 states have call successors, (1274) [2023-11-06 23:10:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6877 states to 6877 states and 11388 transitions. [2023-11-06 23:10:31,928 INFO L78 Accepts]: Start accepts. Automaton has 6877 states and 11388 transitions. Word has length 825 [2023-11-06 23:10:31,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:31,931 INFO L495 AbstractCegarLoop]: Abstraction has 6877 states and 11388 transitions. [2023-11-06 23:10:31,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.25) internal successors, (298), 8 states have internal predecessors, (298), 3 states have call successors, (197), 2 states have call predecessors, (197), 4 states have return successors, (198), 3 states have call predecessors, (198), 3 states have call successors, (198) [2023-11-06 23:10:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 6877 states and 11388 transitions. [2023-11-06 23:10:31,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2023-11-06 23:10:31,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:31,948 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:31,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:32,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:32,159 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:32,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:32,159 INFO L85 PathProgramCache]: Analyzing trace with hash 574914549, now seen corresponding path program 1 times [2023-11-06 23:10:32,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:32,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023465211] [2023-11-06 23:10:32,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:32,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:32,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:32,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1829563882] [2023-11-06 23:10:32,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:32,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:32,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:32,277 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:32,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 23:10:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:33,240 INFO L262 TraceCheckSpWp]: Trace formula consists of 1935 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:10:33,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:34,483 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 14404 proven. 273 refuted. 0 times theorem prover too weak. 19383 trivial. 0 not checked. [2023-11-06 23:10:34,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:35,295 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 117 proven. 273 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2023-11-06 23:10:35,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:35,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023465211] [2023-11-06 23:10:35,296 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:35,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829563882] [2023-11-06 23:10:35,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829563882] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:35,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:35,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:10:35,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270717523] [2023-11-06 23:10:35,297 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:35,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:10:35,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:35,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:10:35,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:10:35,302 INFO L87 Difference]: Start difference. First operand 6877 states and 11388 transitions. Second operand has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (222), 2 states have call predecessors, (222), 4 states have return successors, (223), 2 states have call predecessors, (223), 2 states have call successors, (223) [2023-11-06 23:10:36,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:36,714 INFO L93 Difference]: Finished difference Result 13895 states and 22905 transitions. [2023-11-06 23:10:36,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:10:36,715 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (222), 2 states have call predecessors, (222), 4 states have return successors, (223), 2 states have call predecessors, (223), 2 states have call successors, (223) Word has length 826 [2023-11-06 23:10:36,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:36,742 INFO L225 Difference]: With dead ends: 13895 [2023-11-06 23:10:36,742 INFO L226 Difference]: Without dead ends: 7021 [2023-11-06 23:10:36,758 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1654 GetRequests, 1644 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:10:36,759 INFO L413 NwaCegarLoop]: 461 mSDtfsCounter, 472 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1117 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:36,760 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 1117 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 23:10:36,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7021 states. [2023-11-06 23:10:37,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7021 to 6925. [2023-11-06 23:10:37,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6925 states, 5572 states have (on average 1.5843503230437903) internal successors, (8828), 5592 states have internal predecessors, (8828), 1274 states have call successors, (1274), 78 states have call predecessors, (1274), 78 states have return successors, (1274), 1254 states have call predecessors, (1274), 1274 states have call successors, (1274) [2023-11-06 23:10:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6925 states to 6925 states and 11376 transitions. [2023-11-06 23:10:37,929 INFO L78 Accepts]: Start accepts. Automaton has 6925 states and 11376 transitions. Word has length 826 [2023-11-06 23:10:37,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:37,930 INFO L495 AbstractCegarLoop]: Abstraction has 6925 states and 11376 transitions. [2023-11-06 23:10:37,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (222), 2 states have call predecessors, (222), 4 states have return successors, (223), 2 states have call predecessors, (223), 2 states have call successors, (223) [2023-11-06 23:10:37,931 INFO L276 IsEmpty]: Start isEmpty. Operand 6925 states and 11376 transitions. [2023-11-06 23:10:37,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2023-11-06 23:10:37,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:37,957 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:37,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:38,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:38,170 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:38,171 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:38,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1796824713, now seen corresponding path program 1 times [2023-11-06 23:10:38,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:38,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204337420] [2023-11-06 23:10:38,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:38,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:38,305 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:38,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [93998489] [2023-11-06 23:10:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:38,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:38,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:38,308 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:38,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 23:10:39,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:39,434 INFO L262 TraceCheckSpWp]: Trace formula consists of 1934 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:10:39,451 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 13968 proven. 279 refuted. 0 times theorem prover too weak. 19813 trivial. 0 not checked. [2023-11-06 23:10:40,584 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:41,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 111 proven. 279 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2023-11-06 23:10:41,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:41,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204337420] [2023-11-06 23:10:41,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:41,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93998489] [2023-11-06 23:10:41,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93998489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:41,465 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:41,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:10:41,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325939533] [2023-11-06 23:10:41,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:41,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:10:41,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:41,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:10:41,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:10:41,473 INFO L87 Difference]: Start difference. First operand 6925 states and 11376 transitions. Second operand has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (224), 2 states have call predecessors, (224), 4 states have return successors, (225), 2 states have call predecessors, (225), 2 states have call successors, (225) [2023-11-06 23:10:42,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:42,803 INFO L93 Difference]: Finished difference Result 14015 states and 22905 transitions. [2023-11-06 23:10:42,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:10:42,804 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (224), 2 states have call predecessors, (224), 4 states have return successors, (225), 2 states have call predecessors, (225), 2 states have call successors, (225) Word has length 826 [2023-11-06 23:10:42,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:42,820 INFO L225 Difference]: With dead ends: 14015 [2023-11-06 23:10:42,820 INFO L226 Difference]: Without dead ends: 7093 [2023-11-06 23:10:42,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1654 GetRequests, 1644 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:10:42,833 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 249 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 1121 SdHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:42,833 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 1121 Invalid, 680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 23:10:42,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7093 states. [2023-11-06 23:10:43,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7093 to 6973. [2023-11-06 23:10:43,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6973 states, 5608 states have (on average 1.5763195435092725) internal successors, (8840), 5628 states have internal predecessors, (8840), 1274 states have call successors, (1274), 90 states have call predecessors, (1274), 90 states have return successors, (1274), 1254 states have call predecessors, (1274), 1274 states have call successors, (1274) [2023-11-06 23:10:43,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6973 states to 6973 states and 11388 transitions. [2023-11-06 23:10:43,608 INFO L78 Accepts]: Start accepts. Automaton has 6973 states and 11388 transitions. Word has length 826 [2023-11-06 23:10:43,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:43,609 INFO L495 AbstractCegarLoop]: Abstraction has 6973 states and 11388 transitions. [2023-11-06 23:10:43,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (224), 2 states have call predecessors, (224), 4 states have return successors, (225), 2 states have call predecessors, (225), 2 states have call successors, (225) [2023-11-06 23:10:43,610 INFO L276 IsEmpty]: Start isEmpty. Operand 6973 states and 11388 transitions. [2023-11-06 23:10:43,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2023-11-06 23:10:43,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:43,629 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:43,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:43,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:43,830 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:43,831 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:43,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1374122887, now seen corresponding path program 1 times [2023-11-06 23:10:43,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:43,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95602540] [2023-11-06 23:10:43,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:43,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:43,993 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:43,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [446719105] [2023-11-06 23:10:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:43,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:43,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:43,996 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:44,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 23:10:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:45,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 1933 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-06 23:10:45,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:45,806 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 17050 proven. 210 refuted. 0 times theorem prover too weak. 16800 trivial. 0 not checked. [2023-11-06 23:10:45,806 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 180 proven. 210 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2023-11-06 23:10:46,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:46,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95602540] [2023-11-06 23:10:46,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:46,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446719105] [2023-11-06 23:10:46,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446719105] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:46,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:46,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-06 23:10:46,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479290009] [2023-11-06 23:10:46,493 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:46,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 23:10:46,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:46,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 23:10:46,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2023-11-06 23:10:46,499 INFO L87 Difference]: Start difference. First operand 6973 states and 11388 transitions. Second operand has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 2 states have call successors, (201), 2 states have call predecessors, (201), 4 states have return successors, (202), 2 states have call predecessors, (202), 2 states have call successors, (202) [2023-11-06 23:10:50,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:50,172 INFO L93 Difference]: Finished difference Result 18699 states and 30001 transitions. [2023-11-06 23:10:50,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-06 23:10:50,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 2 states have call successors, (201), 2 states have call predecessors, (201), 4 states have return successors, (202), 2 states have call predecessors, (202), 2 states have call successors, (202) Word has length 826 [2023-11-06 23:10:50,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:50,207 INFO L225 Difference]: With dead ends: 18699 [2023-11-06 23:10:50,207 INFO L226 Difference]: Without dead ends: 11729 [2023-11-06 23:10:50,221 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1665 GetRequests, 1645 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2023-11-06 23:10:50,222 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 1104 mSDsluCounter, 1822 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1162 SdHoareTripleChecker+Valid, 2378 SdHoareTripleChecker+Invalid, 1699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:50,222 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1162 Valid, 2378 Invalid, 1699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-06 23:10:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11729 states. [2023-11-06 23:10:51,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11729 to 6709. [2023-11-06 23:10:51,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6709 states, 5338 states have (on average 1.5545147995503934) internal successors, (8298), 5358 states have internal predecessors, (8298), 1274 states have call successors, (1274), 96 states have call predecessors, (1274), 96 states have return successors, (1274), 1254 states have call predecessors, (1274), 1274 states have call successors, (1274) [2023-11-06 23:10:51,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6709 states to 6709 states and 10846 transitions. [2023-11-06 23:10:51,163 INFO L78 Accepts]: Start accepts. Automaton has 6709 states and 10846 transitions. Word has length 826 [2023-11-06 23:10:51,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:51,165 INFO L495 AbstractCegarLoop]: Abstraction has 6709 states and 10846 transitions. [2023-11-06 23:10:51,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 2 states have call successors, (201), 2 states have call predecessors, (201), 4 states have return successors, (202), 2 states have call predecessors, (202), 2 states have call successors, (202) [2023-11-06 23:10:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 6709 states and 10846 transitions. [2023-11-06 23:10:51,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2023-11-06 23:10:51,179 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:51,179 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:51,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:51,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:51,380 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:51,380 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:51,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1867518457, now seen corresponding path program 1 times [2023-11-06 23:10:51,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:51,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668514330] [2023-11-06 23:10:51,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:51,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:51,510 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:51,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [250471459] [2023-11-06 23:10:51,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:51,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:51,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:51,513 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:51,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 23:10:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:10:52,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 1933 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 23:10:52,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:10:54,134 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 8604 proven. 333 refuted. 0 times theorem prover too weak. 25123 trivial. 0 not checked. [2023-11-06 23:10:54,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:10:55,204 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 57 proven. 333 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2023-11-06 23:10:55,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:10:55,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668514330] [2023-11-06 23:10:55,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:10:55,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250471459] [2023-11-06 23:10:55,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250471459] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:10:55,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:10:55,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-06 23:10:55,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962400229] [2023-11-06 23:10:55,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:10:55,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:10:55,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:10:55,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:10:55,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:10:55,214 INFO L87 Difference]: Start difference. First operand 6709 states and 10846 transitions. Second operand has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 2 states have call successors, (242), 2 states have call predecessors, (242), 4 states have return successors, (243), 2 states have call predecessors, (243), 2 states have call successors, (243) [2023-11-06 23:10:58,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:10:58,401 INFO L93 Difference]: Finished difference Result 16527 states and 26596 transitions. [2023-11-06 23:10:58,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-06 23:10:58,402 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 2 states have call successors, (242), 2 states have call predecessors, (242), 4 states have return successors, (243), 2 states have call predecessors, (243), 2 states have call successors, (243) Word has length 826 [2023-11-06 23:10:58,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:10:58,423 INFO L225 Difference]: With dead ends: 16527 [2023-11-06 23:10:58,423 INFO L226 Difference]: Without dead ends: 9821 [2023-11-06 23:10:58,434 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1662 GetRequests, 1643 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:10:58,435 INFO L413 NwaCegarLoop]: 900 mSDtfsCounter, 721 mSDsluCounter, 1717 mSDsCounter, 0 mSdLazyCounter, 1448 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 741 SdHoareTripleChecker+Valid, 2617 SdHoareTripleChecker+Invalid, 1762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 1448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:10:58,435 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [741 Valid, 2617 Invalid, 1762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 1448 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-06 23:10:58,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9821 states. [2023-11-06 23:10:59,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9821 to 6983. [2023-11-06 23:10:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6983 states, 5446 states have (on average 1.5302974660301139) internal successors, (8334), 5467 states have internal predecessors, (8334), 1405 states have call successors, (1405), 131 states have call predecessors, (1405), 131 states have return successors, (1405), 1384 states have call predecessors, (1405), 1405 states have call successors, (1405) [2023-11-06 23:10:59,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6983 states to 6983 states and 11144 transitions. [2023-11-06 23:10:59,452 INFO L78 Accepts]: Start accepts. Automaton has 6983 states and 11144 transitions. Word has length 826 [2023-11-06 23:10:59,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:10:59,454 INFO L495 AbstractCegarLoop]: Abstraction has 6983 states and 11144 transitions. [2023-11-06 23:10:59,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 22.875) internal successors, (183), 8 states have internal predecessors, (183), 2 states have call successors, (242), 2 states have call predecessors, (242), 4 states have return successors, (243), 2 states have call predecessors, (243), 2 states have call successors, (243) [2023-11-06 23:10:59,454 INFO L276 IsEmpty]: Start isEmpty. Operand 6983 states and 11144 transitions. [2023-11-06 23:10:59,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2023-11-06 23:10:59,468 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:10:59,469 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:10:59,478 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 23:10:59,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:59,670 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:10:59,670 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:10:59,670 INFO L85 PathProgramCache]: Analyzing trace with hash 794799256, now seen corresponding path program 1 times [2023-11-06 23:10:59,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:10:59,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178101723] [2023-11-06 23:10:59,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:59,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:10:59,783 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:10:59,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2001426655] [2023-11-06 23:10:59,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:10:59,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:10:59,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:10:59,785 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:10:59,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 23:11:00,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:00,804 INFO L262 TraceCheckSpWp]: Trace formula consists of 1935 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-06 23:11:00,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:02,806 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2023-11-06 23:11:02,806 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 23:11:02,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:02,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178101723] [2023-11-06 23:11:02,807 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:02,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001426655] [2023-11-06 23:11:02,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001426655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 23:11:02,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 23:11:02,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-06 23:11:02,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493553516] [2023-11-06 23:11:02,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:02,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 23:11:02,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:02,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 23:11:02,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-06 23:11:02,812 INFO L87 Difference]: Start difference. First operand 6983 states and 11144 transitions. Second operand has 8 states, 8 states have (on average 21.75) internal successors, (174), 7 states have internal predecessors, (174), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:11:07,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:07,706 INFO L93 Difference]: Finished difference Result 22269 states and 35163 transitions. [2023-11-06 23:11:07,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 23:11:07,706 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.75) internal successors, (174), 7 states have internal predecessors, (174), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) Word has length 826 [2023-11-06 23:11:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:07,737 INFO L225 Difference]: With dead ends: 22269 [2023-11-06 23:11:07,737 INFO L226 Difference]: Without dead ends: 15365 [2023-11-06 23:11:07,748 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 828 GetRequests, 819 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:11:07,749 INFO L413 NwaCegarLoop]: 745 mSDtfsCounter, 1756 mSDsluCounter, 2788 mSDsCounter, 0 mSdLazyCounter, 2017 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 3533 SdHoareTripleChecker+Invalid, 2247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:07,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 3533 Invalid, 2247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2017 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-06 23:11:07,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15365 states. [2023-11-06 23:11:09,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15365 to 13354. [2023-11-06 23:11:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13354 states, 10621 states have (on average 1.5217022879201583) internal successors, (16162), 10670 states have internal predecessors, (16162), 2498 states have call successors, (2498), 234 states have call predecessors, (2498), 234 states have return successors, (2498), 2449 states have call predecessors, (2498), 2498 states have call successors, (2498) [2023-11-06 23:11:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13354 states to 13354 states and 21158 transitions. [2023-11-06 23:11:09,505 INFO L78 Accepts]: Start accepts. Automaton has 13354 states and 21158 transitions. Word has length 826 [2023-11-06 23:11:09,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:09,506 INFO L495 AbstractCegarLoop]: Abstraction has 13354 states and 21158 transitions. [2023-11-06 23:11:09,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.75) internal successors, (174), 7 states have internal predecessors, (174), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:11:09,506 INFO L276 IsEmpty]: Start isEmpty. Operand 13354 states and 21158 transitions. [2023-11-06 23:11:09,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2023-11-06 23:11:09,517 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:09,518 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:09,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:09,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:09,719 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:09,719 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:09,719 INFO L85 PathProgramCache]: Analyzing trace with hash -302248428, now seen corresponding path program 1 times [2023-11-06 23:11:09,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:09,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098836448] [2023-11-06 23:11:09,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:09,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:09,824 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:09,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [67846327] [2023-11-06 23:11:09,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:09,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:09,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:09,827 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:09,850 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-06 23:11:11,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:11,073 INFO L262 TraceCheckSpWp]: Trace formula consists of 1933 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:11:11,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:12,320 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 10998 proven. 312 refuted. 0 times theorem prover too weak. 22750 trivial. 0 not checked. [2023-11-06 23:11:12,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:13,306 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 78 proven. 312 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2023-11-06 23:11:13,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:13,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098836448] [2023-11-06 23:11:13,307 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:13,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67846327] [2023-11-06 23:11:13,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67846327] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:13,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:11:13,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:11:13,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477153283] [2023-11-06 23:11:13,309 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:13,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:11:13,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:13,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:11:13,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:11:13,313 INFO L87 Difference]: Start difference. First operand 13354 states and 21158 transitions. Second operand has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (235), 2 states have call predecessors, (235), 4 states have return successors, (236), 2 states have call predecessors, (236), 2 states have call successors, (236) [2023-11-06 23:11:15,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:15,663 INFO L93 Difference]: Finished difference Result 25473 states and 40303 transitions. [2023-11-06 23:11:15,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:11:15,664 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (235), 2 states have call predecessors, (235), 4 states have return successors, (236), 2 states have call predecessors, (236), 2 states have call successors, (236) Word has length 826 [2023-11-06 23:11:15,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:15,697 INFO L225 Difference]: With dead ends: 25473 [2023-11-06 23:11:15,698 INFO L226 Difference]: Without dead ends: 12111 [2023-11-06 23:11:15,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1654 GetRequests, 1644 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:11:15,722 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 239 mSDsluCounter, 690 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:15,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1185 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 23:11:15,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12111 states. [2023-11-06 23:11:17,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12111 to 11809. [2023-11-06 23:11:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11809 states, 9381 states have (on average 1.512098923355719) internal successors, (14185), 9418 states have internal predecessors, (14185), 2198 states have call successors, (2198), 229 states have call predecessors, (2198), 229 states have return successors, (2198), 2161 states have call predecessors, (2198), 2198 states have call successors, (2198) [2023-11-06 23:11:17,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11809 states to 11809 states and 18581 transitions. [2023-11-06 23:11:17,329 INFO L78 Accepts]: Start accepts. Automaton has 11809 states and 18581 transitions. Word has length 826 [2023-11-06 23:11:17,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:17,330 INFO L495 AbstractCegarLoop]: Abstraction has 11809 states and 18581 transitions. [2023-11-06 23:11:17,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (235), 2 states have call predecessors, (235), 4 states have return successors, (236), 2 states have call predecessors, (236), 2 states have call successors, (236) [2023-11-06 23:11:17,330 INFO L276 IsEmpty]: Start isEmpty. Operand 11809 states and 18581 transitions. [2023-11-06 23:11:17,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 827 [2023-11-06 23:11:17,343 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:17,344 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:17,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:17,553 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-06 23:11:17,553 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:17,554 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:17,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1623685222, now seen corresponding path program 1 times [2023-11-06 23:11:17,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:17,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845585475] [2023-11-06 23:11:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:17,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:17,684 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:17,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1381351060] [2023-11-06 23:11:17,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:17,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:17,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:17,687 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:17,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-06 23:11:18,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:18,816 INFO L262 TraceCheckSpWp]: Trace formula consists of 1936 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 23:11:18,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 11610 proven. 306 refuted. 0 times theorem prover too weak. 22144 trivial. 0 not checked. [2023-11-06 23:11:19,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 84 proven. 306 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2023-11-06 23:11:20,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:20,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845585475] [2023-11-06 23:11:20,670 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:20,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381351060] [2023-11-06 23:11:20,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381351060] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:20,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:11:20,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 23:11:20,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806878394] [2023-11-06 23:11:20,671 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:20,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:11:20,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:20,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:11:20,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 23:11:20,676 INFO L87 Difference]: Start difference. First operand 11809 states and 18581 transitions. Second operand has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (233), 2 states have call predecessors, (233), 4 states have return successors, (234), 2 states have call predecessors, (234), 2 states have call successors, (234) [2023-11-06 23:11:23,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:23,125 INFO L93 Difference]: Finished difference Result 23306 states and 36430 transitions. [2023-11-06 23:11:23,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 23:11:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (233), 2 states have call predecessors, (233), 4 states have return successors, (234), 2 states have call predecessors, (234), 2 states have call successors, (234) Word has length 826 [2023-11-06 23:11:23,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:23,158 INFO L225 Difference]: With dead ends: 23306 [2023-11-06 23:11:23,158 INFO L226 Difference]: Without dead ends: 11758 [2023-11-06 23:11:23,309 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1654 GetRequests, 1644 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-06 23:11:23,309 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 539 mSDsluCounter, 655 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:23,310 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 1154 Invalid, 824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 23:11:23,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11758 states. [2023-11-06 23:11:24,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11758 to 11456. [2023-11-06 23:11:24,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11456 states, 9009 states have (on average 1.5004995004995005) internal successors, (13518), 9046 states have internal predecessors, (13518), 2198 states have call successors, (2198), 248 states have call predecessors, (2198), 248 states have return successors, (2198), 2161 states have call predecessors, (2198), 2198 states have call successors, (2198) [2023-11-06 23:11:24,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11456 states to 11456 states and 17914 transitions. [2023-11-06 23:11:24,956 INFO L78 Accepts]: Start accepts. Automaton has 11456 states and 17914 transitions. Word has length 826 [2023-11-06 23:11:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:24,957 INFO L495 AbstractCegarLoop]: Abstraction has 11456 states and 17914 transitions. [2023-11-06 23:11:24,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.142857142857142) internal successors, (183), 7 states have internal predecessors, (183), 2 states have call successors, (233), 2 states have call predecessors, (233), 4 states have return successors, (234), 2 states have call predecessors, (234), 2 states have call successors, (234) [2023-11-06 23:11:24,957 INFO L276 IsEmpty]: Start isEmpty. Operand 11456 states and 17914 transitions. [2023-11-06 23:11:24,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2023-11-06 23:11:24,968 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:24,969 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:24,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:25,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:25,169 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:25,170 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:25,170 INFO L85 PathProgramCache]: Analyzing trace with hash 903439764, now seen corresponding path program 1 times [2023-11-06 23:11:25,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:25,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769062872] [2023-11-06 23:11:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:25,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:25,278 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:25,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110014887] [2023-11-06 23:11:25,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:25,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:25,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:25,281 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:25,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-06 23:11:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:26,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 1937 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-06 23:11:26,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:27,911 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 13500 proven. 285 refuted. 0 times theorem prover too weak. 20275 trivial. 0 not checked. [2023-11-06 23:11:27,911 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 34060 trivial. 0 not checked. [2023-11-06 23:11:28,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:28,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769062872] [2023-11-06 23:11:28,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:28,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110014887] [2023-11-06 23:11:28,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110014887] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-06 23:11:28,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 23:11:28,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [10] total 15 [2023-11-06 23:11:28,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888536794] [2023-11-06 23:11:28,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 23:11:28,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 23:11:28,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:28,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 23:11:28,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2023-11-06 23:11:28,815 INFO L87 Difference]: Start difference. First operand 11456 states and 17914 transitions. Second operand has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:11:35,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:11:35,025 INFO L93 Difference]: Finished difference Result 51190 states and 79902 transitions. [2023-11-06 23:11:35,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-06 23:11:35,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) Word has length 827 [2023-11-06 23:11:35,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:11:35,092 INFO L225 Difference]: With dead ends: 51190 [2023-11-06 23:11:35,092 INFO L226 Difference]: Without dead ends: 39999 [2023-11-06 23:11:35,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1658 GetRequests, 1641 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2023-11-06 23:11:35,108 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 1970 mSDsluCounter, 3252 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1970 SdHoareTripleChecker+Valid, 4112 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-06 23:11:35,108 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1970 Valid, 4112 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-06 23:11:35,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39999 states. [2023-11-06 23:11:39,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39999 to 34435. [2023-11-06 23:11:39,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34435 states, 27743 states have (on average 1.50938975597448) internal successors, (41875), 27888 states have internal predecessors, (41875), 6065 states have call successors, (6065), 626 states have call predecessors, (6065), 626 states have return successors, (6065), 5920 states have call predecessors, (6065), 6065 states have call successors, (6065) [2023-11-06 23:11:39,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34435 states to 34435 states and 54005 transitions. [2023-11-06 23:11:39,922 INFO L78 Accepts]: Start accepts. Automaton has 34435 states and 54005 transitions. Word has length 827 [2023-11-06 23:11:39,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 23:11:39,923 INFO L495 AbstractCegarLoop]: Abstraction has 34435 states and 54005 transitions. [2023-11-06 23:11:39,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 1 states have call successors, (131), 1 states have call predecessors, (131), 1 states have return successors, (131), 1 states have call predecessors, (131), 1 states have call successors, (131) [2023-11-06 23:11:39,924 INFO L276 IsEmpty]: Start isEmpty. Operand 34435 states and 54005 transitions. [2023-11-06 23:11:39,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2023-11-06 23:11:39,947 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 23:11:39,948 INFO L195 NwaCegarLoop]: trace histogram [131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-06 23:11:39,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-06 23:11:40,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-06 23:11:40,160 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 23:11:40,160 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 23:11:40,161 INFO L85 PathProgramCache]: Analyzing trace with hash 321580116, now seen corresponding path program 1 times [2023-11-06 23:11:40,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 23:11:40,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173743649] [2023-11-06 23:11:40,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:40,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 23:11:40,284 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 23:11:40,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966244042] [2023-11-06 23:11:40,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 23:11:40,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 23:11:40,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 23:11:40,288 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 23:11:40,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61c38969-2218-4731-b421-f243f33acfda/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-06 23:11:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 23:11:41,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 1937 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-06 23:11:41,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 23:11:43,599 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 18458 proven. 228 refuted. 0 times theorem prover too weak. 15374 trivial. 0 not checked. [2023-11-06 23:11:43,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 23:11:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 34060 backedges. 162 proven. 228 refuted. 0 times theorem prover too weak. 33670 trivial. 0 not checked. [2023-11-06 23:11:45,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 23:11:45,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173743649] [2023-11-06 23:11:45,246 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 23:11:45,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966244042] [2023-11-06 23:11:45,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966244042] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 23:11:45,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 23:11:45,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-06 23:11:45,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873336095] [2023-11-06 23:11:45,248 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 23:11:45,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 23:11:45,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 23:11:45,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 23:11:45,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2023-11-06 23:11:45,253 INFO L87 Difference]: Start difference. First operand 34435 states and 54005 transitions. Second operand has 16 states, 16 states have (on average 18.375) internal successors, (294), 16 states have internal predecessors, (294), 5 states have call successors, (218), 3 states have call predecessors, (218), 5 states have return successors, (218), 5 states have call predecessors, (218), 5 states have call successors, (218) [2023-11-06 23:12:19,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 23:12:19,784 INFO L93 Difference]: Finished difference Result 194529 states and 290480 transitions. [2023-11-06 23:12:19,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-06 23:12:19,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 18.375) internal successors, (294), 16 states have internal predecessors, (294), 5 states have call successors, (218), 3 states have call predecessors, (218), 5 states have return successors, (218), 5 states have call predecessors, (218), 5 states have call successors, (218) Word has length 827 [2023-11-06 23:12:19,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 23:12:20,448 INFO L225 Difference]: With dead ends: 194529 [2023-11-06 23:12:20,448 INFO L226 Difference]: Without dead ends: 160359 [2023-11-06 23:12:20,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1700 GetRequests, 1645 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=834, Invalid=2358, Unknown=0, NotChecked=0, Total=3192 [2023-11-06 23:12:20,531 INFO L413 NwaCegarLoop]: 769 mSDtfsCounter, 5151 mSDsluCounter, 3074 mSDsCounter, 0 mSdLazyCounter, 3943 mSolverCounterSat, 2843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5260 SdHoareTripleChecker+Valid, 3843 SdHoareTripleChecker+Invalid, 6786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2843 IncrementalHoareTripleChecker+Valid, 3943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-11-06 23:12:20,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5260 Valid, 3843 Invalid, 6786 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2843 Valid, 3943 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-11-06 23:12:20,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160359 states.