./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-68.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_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/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_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-68.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/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_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/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 6356f25af9bb924bb9550dc7ee13ccad0d46305c0140f2958a98a1290334276d --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 22:52:35,567 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 22:52:35,678 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-06 22:52:35,686 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 22:52:35,687 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 22:52:35,710 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 22:52:35,711 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 22:52:35,711 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 22:52:35,712 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 22:52:35,713 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 22:52:35,714 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 22:52:35,714 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 22:52:35,715 INFO L153 SettingsManager]: * Use SBE=true [2023-11-06 22:52:35,715 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 22:52:35,716 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-06 22:52:35,716 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 22:52:35,717 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 22:52:35,717 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 22:52:35,718 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 22:52:35,719 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-06 22:52:35,719 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 22:52:35,720 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-06 22:52:35,720 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 22:52:35,721 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-06 22:52:35,721 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 22:52:35,722 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 22:52:35,722 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-06 22:52:35,723 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 22:52:35,723 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:52:35,724 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 22:52:35,724 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 22:52:35,725 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-11-06 22:52:35,725 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-06 22:52:35,725 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 22:52:35,726 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-06 22:52:35,726 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-06 22:52:35,727 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-06 22:52:35,727 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 22:52:35,727 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-06 22:52:35,728 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_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6356f25af9bb924bb9550dc7ee13ccad0d46305c0140f2958a98a1290334276d [2023-11-06 22:52:36,015 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 22:52:36,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 22:52:36,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 22:52:36,043 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 22:52:36,043 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 22:52:36,045 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-68.i [2023-11-06 22:52:39,064 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 22:52:39,509 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 22:52:39,510 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-68.i [2023-11-06 22:52:39,540 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/data/592972341/e561219acb1843658159c06abcd773c7/FLAGe283fc384 [2023-11-06 22:52:39,758 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/data/592972341/e561219acb1843658159c06abcd773c7 [2023-11-06 22:52:39,761 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 22:52:39,763 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 22:52:39,764 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 22:52:39,764 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 22:52:39,773 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 22:52:39,776 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:39" (1/1) ... [2023-11-06 22:52:39,778 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d61176f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:39, skipping insertion in model container [2023-11-06 22:52:39,778 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:52:39" (1/1) ... [2023-11-06 22:52:39,866 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 22:52:40,067 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_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-68.i[916,929] [2023-11-06 22:52:40,353 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:52:40,381 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 22:52:40,395 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_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-68.i[916,929] [2023-11-06 22:52:40,544 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 22:52:40,575 INFO L206 MainTranslator]: Completed translation [2023-11-06 22:52:40,575 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40 WrapperNode [2023-11-06 22:52:40,576 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 22:52:40,580 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 22:52:40,580 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 22:52:40,580 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 22:52:40,588 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40" (1/1) ... [2023-11-06 22:52:40,623 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40" (1/1) ... [2023-11-06 22:52:40,803 INFO L138 Inliner]: procedures = 26, calls = 112, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 837 [2023-11-06 22:52:40,803 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 22:52:40,804 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 22:52:40,804 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 22:52:40,805 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 22:52:40,821 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40" (1/1) ... [2023-11-06 22:52:40,821 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40" (1/1) ... [2023-11-06 22:52:40,838 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40" (1/1) ... [2023-11-06 22:52:40,838 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40" (1/1) ... [2023-11-06 22:52:40,878 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40" (1/1) ... [2023-11-06 22:52:40,887 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40" (1/1) ... [2023-11-06 22:52:40,896 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40" (1/1) ... [2023-11-06 22:52:40,908 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40" (1/1) ... [2023-11-06 22:52:40,922 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 22:52:40,923 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 22:52:40,923 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 22:52:40,923 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 22:52:40,924 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40" (1/1) ... [2023-11-06 22:52:40,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 22:52:40,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:40,973 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 22:52:41,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 22:52:41,023 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-06 22:52:41,023 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-06 22:52:41,023 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-06 22:52:41,024 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-06 22:52:41,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 22:52:41,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 22:52:41,208 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 22:52:41,211 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 22:52:42,484 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 22:52:42,505 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 22:52:42,505 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 22:52:42,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:42 BoogieIcfgContainer [2023-11-06 22:52:42,509 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 22:52:42,514 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 22:52:42,514 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 22:52:42,517 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 22:52:42,518 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:52:39" (1/3) ... [2023-11-06 22:52:42,519 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f04b9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:42, skipping insertion in model container [2023-11-06 22:52:42,519 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:52:40" (2/3) ... [2023-11-06 22:52:42,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f04b9fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:52:42, skipping insertion in model container [2023-11-06 22:52:42,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:52:42" (3/3) ... [2023-11-06 22:52:42,522 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-68.i [2023-11-06 22:52:42,543 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 22:52:42,544 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-06 22:52:42,629 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 22:52:42,636 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;@2d8b1ec6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-06 22:52:42,636 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-06 22:52:42,643 INFO L276 IsEmpty]: Start isEmpty. Operand has 318 states, 216 states have (on average 1.6342592592592593) internal successors, (353), 217 states have internal predecessors, (353), 99 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-06 22:52:42,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2023-11-06 22:52:42,748 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:42,752 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:42,753 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:42,761 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:42,761 INFO L85 PathProgramCache]: Analyzing trace with hash 872520315, now seen corresponding path program 1 times [2023-11-06 22:52:42,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:42,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034144116] [2023-11-06 22:52:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:42,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:43,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:43,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034144116] [2023-11-06 22:52:43,368 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-06 22:52:43,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768463187] [2023-11-06 22:52:43,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:43,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:43,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:43,373 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:43,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 22:52:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:43,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-06 22:52:44,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 196 proven. 0 refuted. 0 times theorem prover too weak. 19208 trivial. 0 not checked. [2023-11-06 22:52:44,184 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:44,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768463187] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:44,185 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:44,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:52:44,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12877118] [2023-11-06 22:52:44,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:44,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-06 22:52:44,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:44,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-06 22:52:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-06 22:52:44,252 INFO L87 Difference]: Start difference. First operand has 318 states, 216 states have (on average 1.6342592592592593) internal successors, (353), 217 states have internal predecessors, (353), 99 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) Second operand has 2 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 2 states have call successors, (99), 2 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 2 states have call successors, (99) [2023-11-06 22:52:44,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:44,423 INFO L93 Difference]: Finished difference Result 629 states and 1195 transitions. [2023-11-06 22:52:44,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-06 22:52:44,426 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 2 states have call successors, (99), 2 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 2 states have call successors, (99) Word has length 642 [2023-11-06 22:52:44,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:44,447 INFO L225 Difference]: With dead ends: 629 [2023-11-06 22:52:44,447 INFO L226 Difference]: Without dead ends: 314 [2023-11-06 22:52:44,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 641 GetRequests, 641 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 22:52:44,461 INFO L413 NwaCegarLoop]: 540 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, 540 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 22:52:44,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:44,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-11-06 22:52:44,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2023-11-06 22:52:44,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 213 states have (on average 1.6056338028169015) internal successors, (342), 213 states have internal predecessors, (342), 99 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-06 22:52:44,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 540 transitions. [2023-11-06 22:52:44,593 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 540 transitions. Word has length 642 [2023-11-06 22:52:44,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:44,596 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 540 transitions. [2023-11-06 22:52:44,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 76.0) internal successors, (152), 2 states have internal predecessors, (152), 2 states have call successors, (99), 2 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 2 states have call successors, (99) [2023-11-06 22:52:44,597 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 540 transitions. [2023-11-06 22:52:44,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 643 [2023-11-06 22:52:44,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:44,657 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:44,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-06 22:52:44,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:44,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:44,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:44,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1612050447, now seen corresponding path program 1 times [2023-11-06 22:52:44,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:44,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854232942] [2023-11-06 22:52:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:44,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:45,095 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:45,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [993263814] [2023-11-06 22:52:45,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:45,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:45,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:45,098 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:45,107 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 22:52:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:45,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 1562 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-06 22:52:45,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:45,700 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-06 22:52:45,701 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:45,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:45,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854232942] [2023-11-06 22:52:45,701 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:45,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993263814] [2023-11-06 22:52:45,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993263814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:45,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:45,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-06 22:52:45,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868185652] [2023-11-06 22:52:45,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:45,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:52:45,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:45,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:52:45,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:52:45,708 INFO L87 Difference]: Start difference. First operand 314 states and 540 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:52:45,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:45,792 INFO L93 Difference]: Finished difference Result 625 states and 1077 transitions. [2023-11-06 22:52:45,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:52:45,793 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 642 [2023-11-06 22:52:45,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:45,800 INFO L225 Difference]: With dead ends: 625 [2023-11-06 22:52:45,800 INFO L226 Difference]: Without dead ends: 314 [2023-11-06 22:52:45,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 639 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 22:52:45,803 INFO L413 NwaCegarLoop]: 529 mSDtfsCounter, 542 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 542 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:45,804 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [542 Valid, 1050 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2023-11-06 22:52:45,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 314. [2023-11-06 22:52:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 213 states have (on average 1.6009389671361502) internal successors, (341), 213 states have internal predecessors, (341), 99 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-06 22:52:45,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 539 transitions. [2023-11-06 22:52:45,881 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 539 transitions. Word has length 642 [2023-11-06 22:52:45,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:45,887 INFO L495 AbstractCegarLoop]: Abstraction has 314 states and 539 transitions. [2023-11-06 22:52:45,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:52:45,889 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 539 transitions. [2023-11-06 22:52:45,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2023-11-06 22:52:45,901 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:45,902 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:45,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 22:52:46,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:46,111 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:46,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:46,113 INFO L85 PathProgramCache]: Analyzing trace with hash -635885703, now seen corresponding path program 1 times [2023-11-06 22:52:46,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:46,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071177722] [2023-11-06 22:52:46,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:46,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:46,279 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:46,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282263638] [2023-11-06 22:52:46,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:46,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:46,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:46,285 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:46,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 22:52:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:46,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 1563 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:52:46,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:46,971 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-06 22:52:47,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:47,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:47,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071177722] [2023-11-06 22:52:47,002 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:47,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282263638] [2023-11-06 22:52:47,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282263638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:47,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:47,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:52:47,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734843185] [2023-11-06 22:52:47,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:47,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:52:47,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:47,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:52:47,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:47,007 INFO L87 Difference]: Start difference. First operand 314 states and 539 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:52:47,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:47,113 INFO L93 Difference]: Finished difference Result 914 states and 1568 transitions. [2023-11-06 22:52:47,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:52:47,114 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 643 [2023-11-06 22:52:47,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:47,128 INFO L225 Difference]: With dead ends: 914 [2023-11-06 22:52:47,128 INFO L226 Difference]: Without dead ends: 603 [2023-11-06 22:52:47,130 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 641 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 22:52:47,133 INFO L413 NwaCegarLoop]: 862 mSDtfsCounter, 451 mSDsluCounter, 531 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 451 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:47,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [451 Valid, 1393 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:47,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2023-11-06 22:52:47,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 379. [2023-11-06 22:52:47,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 278 states have (on average 1.6654676258992807) internal successors, (463), 278 states have internal predecessors, (463), 99 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 99 states have call predecessors, (99), 99 states have call successors, (99) [2023-11-06 22:52:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 661 transitions. [2023-11-06 22:52:47,219 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 661 transitions. Word has length 643 [2023-11-06 22:52:47,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:47,222 INFO L495 AbstractCegarLoop]: Abstraction has 379 states and 661 transitions. [2023-11-06 22:52:47,222 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:52:47,222 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 661 transitions. [2023-11-06 22:52:47,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2023-11-06 22:52:47,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:47,231 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:47,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:47,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:47,452 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:47,453 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:47,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1853643259, now seen corresponding path program 1 times [2023-11-06 22:52:47,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:47,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230730934] [2023-11-06 22:52:47,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:47,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:47,554 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:47,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2105257642] [2023-11-06 22:52:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:47,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:47,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:47,556 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:47,579 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 22:52:48,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:48,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 1564 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:52:48,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-06 22:52:48,233 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:48,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:48,233 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230730934] [2023-11-06 22:52:48,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:48,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105257642] [2023-11-06 22:52:48,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105257642] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:48,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:48,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:52:48,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422244876] [2023-11-06 22:52:48,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:48,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:52:48,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:48,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:52:48,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:52:48,239 INFO L87 Difference]: Start difference. First operand 379 states and 661 transitions. Second operand has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:52:48,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:48,320 INFO L93 Difference]: Finished difference Result 1010 states and 1766 transitions. [2023-11-06 22:52:48,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:52:48,322 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 643 [2023-11-06 22:52:48,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:48,329 INFO L225 Difference]: With dead ends: 1010 [2023-11-06 22:52:48,329 INFO L226 Difference]: Without dead ends: 634 [2023-11-06 22:52:48,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 641 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 22:52:48,332 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 317 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:48,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 1161 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:52:48,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2023-11-06 22:52:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 631. [2023-11-06 22:52:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 487 states have (on average 1.6878850102669405) internal successors, (822), 488 states have internal predecessors, (822), 141 states have call successors, (141), 2 states have call predecessors, (141), 2 states have return successors, (141), 140 states have call predecessors, (141), 141 states have call successors, (141) [2023-11-06 22:52:48,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1104 transitions. [2023-11-06 22:52:48,415 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1104 transitions. Word has length 643 [2023-11-06 22:52:48,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:48,417 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 1104 transitions. [2023-11-06 22:52:48,418 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.333333333333336) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:52:48,418 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1104 transitions. [2023-11-06 22:52:48,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2023-11-06 22:52:48,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:48,426 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:48,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:48,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:48,636 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:48,636 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:48,636 INFO L85 PathProgramCache]: Analyzing trace with hash -1554101191, now seen corresponding path program 1 times [2023-11-06 22:52:48,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:48,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842751936] [2023-11-06 22:52:48,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:48,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:48,790 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:48,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26814599] [2023-11-06 22:52:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:48,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:48,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:48,811 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:48,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 22:52:49,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:49,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:52:49,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:50,563 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-06 22:52:50,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:50,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:50,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842751936] [2023-11-06 22:52:50,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:50,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26814599] [2023-11-06 22:52:50,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26814599] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:50,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:50,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:52:50,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839403982] [2023-11-06 22:52:50,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:50,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:52:50,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:50,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:52:50,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:52:50,570 INFO L87 Difference]: Start difference. First operand 631 states and 1104 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:52:51,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:51,233 INFO L93 Difference]: Finished difference Result 2513 states and 4403 transitions. [2023-11-06 22:52:51,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:52:51,234 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 643 [2023-11-06 22:52:51,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:51,253 INFO L225 Difference]: With dead ends: 2513 [2023-11-06 22:52:51,254 INFO L226 Difference]: Without dead ends: 1885 [2023-11-06 22:52:51,257 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 642 GetRequests, 640 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 22:52:51,258 INFO L413 NwaCegarLoop]: 791 mSDtfsCounter, 769 mSDsluCounter, 990 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 769 SdHoareTripleChecker+Valid, 1781 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:51,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [769 Valid, 1781 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:52:51,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1885 states. [2023-11-06 22:52:51,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1885 to 1873. [2023-11-06 22:52:51,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1443 states have (on average 1.681912681912682) internal successors, (2427), 1446 states have internal predecessors, (2427), 423 states have call successors, (423), 6 states have call predecessors, (423), 6 states have return successors, (423), 420 states have call predecessors, (423), 423 states have call successors, (423) [2023-11-06 22:52:51,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3273 transitions. [2023-11-06 22:52:51,525 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3273 transitions. Word has length 643 [2023-11-06 22:52:51,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:51,527 INFO L495 AbstractCegarLoop]: Abstraction has 1873 states and 3273 transitions. [2023-11-06 22:52:51,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:52:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3273 transitions. [2023-11-06 22:52:51,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2023-11-06 22:52:51,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:51,539 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:51,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:51,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:51,749 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:51,749 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:51,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1737100172, now seen corresponding path program 1 times [2023-11-06 22:52:51,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:51,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476231566] [2023-11-06 22:52:51,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:51,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:51,883 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:51,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [521251777] [2023-11-06 22:52:51,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:51,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:51,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:51,885 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:51,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-06 22:52:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:52,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 1566 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:52:52,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:52:55,248 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-06 22:52:55,249 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:52:55,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:52:55,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476231566] [2023-11-06 22:52:55,250 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:52:55,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521251777] [2023-11-06 22:52:55,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521251777] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:52:55,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:52:55,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:52:55,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302439035] [2023-11-06 22:52:55,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:52:55,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 22:52:55,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:52:55,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 22:52:55,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 22:52:55,255 INFO L87 Difference]: Start difference. First operand 1873 states and 3273 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:52:55,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:52:55,980 INFO L93 Difference]: Finished difference Result 5729 states and 9970 transitions. [2023-11-06 22:52:55,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 22:52:55,981 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 644 [2023-11-06 22:52:55,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:52:56,010 INFO L225 Difference]: With dead ends: 5729 [2023-11-06 22:52:56,010 INFO L226 Difference]: Without dead ends: 3859 [2023-11-06 22:52:56,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 641 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 22:52:56,017 INFO L413 NwaCegarLoop]: 533 mSDtfsCounter, 565 mSDsluCounter, 1054 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 565 SdHoareTripleChecker+Valid, 1587 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-06 22:52:56,018 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [565 Valid, 1587 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-06 22:52:56,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3859 states. [2023-11-06 22:52:56,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3859 to 3720. [2023-11-06 22:52:56,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3720 states, 2861 states have (on average 1.6745893044390074) internal successors, (4791), 2867 states have internal predecessors, (4791), 846 states have call successors, (846), 12 states have call predecessors, (846), 12 states have return successors, (846), 840 states have call predecessors, (846), 846 states have call successors, (846) [2023-11-06 22:52:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 6483 transitions. [2023-11-06 22:52:56,994 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 6483 transitions. Word has length 644 [2023-11-06 22:52:56,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:52:56,995 INFO L495 AbstractCegarLoop]: Abstraction has 3720 states and 6483 transitions. [2023-11-06 22:52:56,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:52:56,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 6483 transitions. [2023-11-06 22:52:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2023-11-06 22:52:57,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:52:57,009 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:52:57,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-06 22:52:57,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:57,230 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:52:57,230 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:52:57,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1871113678, now seen corresponding path program 1 times [2023-11-06 22:52:57,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:52:57,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723824835] [2023-11-06 22:52:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:57,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:52:57,325 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:52:57,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [70312596] [2023-11-06 22:52:57,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:52:57,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:52:57,327 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:52:57,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:52:57,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-06 22:52:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:52:57,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 1567 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:52:57,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-06 22:53:00,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:00,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:00,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723824835] [2023-11-06 22:53:00,320 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:00,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70312596] [2023-11-06 22:53:00,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70312596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:00,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:00,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 22:53:00,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960782921] [2023-11-06 22:53:00,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:00,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:53:00,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:00,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:53:00,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:53:00,325 INFO L87 Difference]: Start difference. First operand 3720 states and 6483 transitions. Second operand has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:53:00,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:00,781 INFO L93 Difference]: Finished difference Result 11154 states and 19443 transitions. [2023-11-06 22:53:00,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:00,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 644 [2023-11-06 22:53:00,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:00,840 INFO L225 Difference]: With dead ends: 11154 [2023-11-06 22:53:00,840 INFO L226 Difference]: Without dead ends: 7437 [2023-11-06 22:53:00,855 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 643 GetRequests, 642 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 22:53:00,856 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 214 mSDsluCounter, 528 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 1070 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:00,857 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [214 Valid, 1070 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:53:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7437 states. [2023-11-06 22:53:02,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7437 to 7432. [2023-11-06 22:53:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7432 states, 5715 states have (on average 1.668766404199475) internal successors, (9537), 5727 states have internal predecessors, (9537), 1692 states have call successors, (1692), 24 states have call predecessors, (1692), 24 states have return successors, (1692), 1680 states have call predecessors, (1692), 1692 states have call successors, (1692) [2023-11-06 22:53:02,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7432 states to 7432 states and 12921 transitions. [2023-11-06 22:53:02,194 INFO L78 Accepts]: Start accepts. Automaton has 7432 states and 12921 transitions. Word has length 644 [2023-11-06 22:53:02,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:02,196 INFO L495 AbstractCegarLoop]: Abstraction has 7432 states and 12921 transitions. [2023-11-06 22:53:02,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.666666666666664) internal successors, (152), 2 states have internal predecessors, (152), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:53:02,197 INFO L276 IsEmpty]: Start isEmpty. Operand 7432 states and 12921 transitions. [2023-11-06 22:53:02,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 645 [2023-11-06 22:53:02,213 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:02,214 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:02,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:02,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:02,424 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:02,425 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:02,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1169513804, now seen corresponding path program 1 times [2023-11-06 22:53:02,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:02,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785165114] [2023-11-06 22:53:02,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:02,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:02,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:02,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2071328852] [2023-11-06 22:53:02,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:02,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:02,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:02,548 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:02,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-06 22:53:03,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:03,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 1568 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:53:03,157 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 9458 proven. 174 refuted. 0 times theorem prover too weak. 9772 trivial. 0 not checked. [2023-11-06 22:53:03,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:04,539 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 120 proven. 174 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-06 22:53:04,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:04,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785165114] [2023-11-06 22:53:04,540 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:04,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071328852] [2023-11-06 22:53:04,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071328852] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:04,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:53:04,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:53:04,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787182343] [2023-11-06 22:53:04,542 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:04,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:53:04,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:04,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:53:04,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:53:04,545 INFO L87 Difference]: Start difference. First operand 7432 states and 12921 transitions. Second operand has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (157), 2 states have call predecessors, (157), 4 states have return successors, (158), 2 states have call predecessors, (158), 2 states have call successors, (158) [2023-11-06 22:53:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:06,016 INFO L93 Difference]: Finished difference Result 15071 states and 26065 transitions. [2023-11-06 22:53:06,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:53:06,017 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (157), 2 states have call predecessors, (157), 4 states have return successors, (158), 2 states have call predecessors, (158), 2 states have call successors, (158) Word has length 644 [2023-11-06 22:53:06,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:06,099 INFO L225 Difference]: With dead ends: 15071 [2023-11-06 22:53:06,100 INFO L226 Difference]: Without dead ends: 7642 [2023-11-06 22:53:06,123 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1290 GetRequests, 1280 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 22:53:06,124 INFO L413 NwaCegarLoop]: 495 mSDtfsCounter, 316 mSDsluCounter, 741 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:06,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 1236 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-06 22:53:06,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7642 states. [2023-11-06 22:53:07,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7642 to 7591. [2023-11-06 22:53:07,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7591 states, 5810 states have (on average 1.6413080895008605) internal successors, (9536), 5823 states have internal predecessors, (9536), 1732 states have call successors, (1732), 48 states have call predecessors, (1732), 48 states have return successors, (1732), 1719 states have call predecessors, (1732), 1732 states have call successors, (1732) [2023-11-06 22:53:07,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7591 states to 7591 states and 13000 transitions. [2023-11-06 22:53:07,644 INFO L78 Accepts]: Start accepts. Automaton has 7591 states and 13000 transitions. Word has length 644 [2023-11-06 22:53:07,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:07,646 INFO L495 AbstractCegarLoop]: Abstraction has 7591 states and 13000 transitions. [2023-11-06 22:53:07,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.0) internal successors, (161), 7 states have internal predecessors, (161), 2 states have call successors, (157), 2 states have call predecessors, (157), 4 states have return successors, (158), 2 states have call predecessors, (158), 2 states have call successors, (158) [2023-11-06 22:53:07,647 INFO L276 IsEmpty]: Start isEmpty. Operand 7591 states and 13000 transitions. [2023-11-06 22:53:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 646 [2023-11-06 22:53:07,667 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:07,668 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:07,677 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:07,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:07,878 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:07,878 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:07,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1942157760, now seen corresponding path program 1 times [2023-11-06 22:53:07,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:07,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417699508] [2023-11-06 22:53:07,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:07,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:07,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:07,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411566157] [2023-11-06 22:53:07,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:08,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:08,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:08,001 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:08,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-06 22:53:08,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:08,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 1570 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:53:08,617 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:09,381 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 9590 proven. 168 refuted. 0 times theorem prover too weak. 9646 trivial. 0 not checked. [2023-11-06 22:53:09,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:09,942 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 126 proven. 168 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-06 22:53:09,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:09,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417699508] [2023-11-06 22:53:09,943 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:09,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411566157] [2023-11-06 22:53:09,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411566157] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:09,943 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:53:09,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:53:09,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225020078] [2023-11-06 22:53:09,944 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:09,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:53:09,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:09,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:53:09,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:53:09,950 INFO L87 Difference]: Start difference. First operand 7591 states and 13000 transitions. Second operand has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (155), 2 states have call predecessors, (155), 4 states have return successors, (156), 2 states have call predecessors, (156), 2 states have call successors, (156) [2023-11-06 22:53:11,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:11,048 INFO L93 Difference]: Finished difference Result 12224 states and 20808 transitions. [2023-11-06 22:53:11,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:53:11,049 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (155), 2 states have call predecessors, (155), 4 states have return successors, (156), 2 states have call predecessors, (156), 2 states have call successors, (156) Word has length 645 [2023-11-06 22:53:11,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:11,071 INFO L225 Difference]: With dead ends: 12224 [2023-11-06 22:53:11,071 INFO L226 Difference]: Without dead ends: 4699 [2023-11-06 22:53:11,095 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1292 GetRequests, 1282 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 22:53:11,096 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 334 mSDsluCounter, 656 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 521 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:11,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 1084 Invalid, 521 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:53:11,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4699 states. [2023-11-06 22:53:11,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4699 to 4649. [2023-11-06 22:53:11,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 3372 states have (on average 1.6002372479240807) internal successors, (5396), 3373 states have internal predecessors, (5396), 1228 states have call successors, (1228), 48 states have call predecessors, (1228), 48 states have return successors, (1228), 1227 states have call predecessors, (1228), 1228 states have call successors, (1228) [2023-11-06 22:53:11,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 7852 transitions. [2023-11-06 22:53:11,749 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 7852 transitions. Word has length 645 [2023-11-06 22:53:11,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:11,751 INFO L495 AbstractCegarLoop]: Abstraction has 4649 states and 7852 transitions. [2023-11-06 22:53:11,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.142857142857142) internal successors, (162), 7 states have internal predecessors, (162), 2 states have call successors, (155), 2 states have call predecessors, (155), 4 states have return successors, (156), 2 states have call predecessors, (156), 2 states have call successors, (156) [2023-11-06 22:53:11,751 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 7852 transitions. [2023-11-06 22:53:11,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 647 [2023-11-06 22:53:11,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:11,762 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:11,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:11,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:11,972 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:11,972 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:11,972 INFO L85 PathProgramCache]: Analyzing trace with hash -41580150, now seen corresponding path program 1 times [2023-11-06 22:53:11,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:11,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375561693] [2023-11-06 22:53:11,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:11,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:12,070 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:12,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [588021743] [2023-11-06 22:53:12,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:12,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:12,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:12,072 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:12,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-06 22:53:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:12,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 1570 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-06 22:53:12,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-06 22:53:12,734 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:12,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:12,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375561693] [2023-11-06 22:53:12,735 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:12,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588021743] [2023-11-06 22:53:12,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588021743] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:12,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:12,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-06 22:53:12,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660779568] [2023-11-06 22:53:12,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:12,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 22:53:12,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:12,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 22:53:12,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 22:53:12,739 INFO L87 Difference]: Start difference. First operand 4649 states and 7852 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:53:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:13,336 INFO L93 Difference]: Finished difference Result 11863 states and 20167 transitions. [2023-11-06 22:53:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 22:53:13,337 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 646 [2023-11-06 22:53:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:13,368 INFO L225 Difference]: With dead ends: 11863 [2023-11-06 22:53:13,368 INFO L226 Difference]: Without dead ends: 7280 [2023-11-06 22:53:13,388 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 645 GetRequests, 644 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 22:53:13,389 INFO L413 NwaCegarLoop]: 600 mSDtfsCounter, 265 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1111 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:13,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1111 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 22:53:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7280 states. [2023-11-06 22:53:14,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7280 to 7266. [2023-11-06 22:53:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7266 states, 5832 states have (on average 1.6467764060356653) internal successors, (9604), 5845 states have internal predecessors, (9604), 1372 states have call successors, (1372), 61 states have call predecessors, (1372), 61 states have return successors, (1372), 1359 states have call predecessors, (1372), 1372 states have call successors, (1372) [2023-11-06 22:53:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7266 states to 7266 states and 12348 transitions. [2023-11-06 22:53:14,798 INFO L78 Accepts]: Start accepts. Automaton has 7266 states and 12348 transitions. Word has length 646 [2023-11-06 22:53:14,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:14,800 INFO L495 AbstractCegarLoop]: Abstraction has 7266 states and 12348 transitions. [2023-11-06 22:53:14,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:53:14,801 INFO L276 IsEmpty]: Start isEmpty. Operand 7266 states and 12348 transitions. [2023-11-06 22:53:14,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 649 [2023-11-06 22:53:14,821 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:14,822 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:14,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:15,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-06 22:53:15,032 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:15,032 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:15,033 INFO L85 PathProgramCache]: Analyzing trace with hash 414127140, now seen corresponding path program 1 times [2023-11-06 22:53:15,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:15,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711490744] [2023-11-06 22:53:15,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:15,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:15,147 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:15,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949906533] [2023-11-06 22:53:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:15,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:15,148 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:15,150 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:15,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-06 22:53:15,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:15,840 INFO L262 TraceCheckSpWp]: Trace formula consists of 1575 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:53:15,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 7544 proven. 75 refuted. 0 times theorem prover too weak. 11785 trivial. 0 not checked. [2023-11-06 22:53:16,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:16,675 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 219 proven. 75 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-06 22:53:16,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:16,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711490744] [2023-11-06 22:53:16,676 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:16,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949906533] [2023-11-06 22:53:16,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949906533] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:16,677 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:53:16,677 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:53:16,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784031329] [2023-11-06 22:53:16,678 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:16,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:53:16,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:16,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:53:16,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:53:16,681 INFO L87 Difference]: Start difference. First operand 7266 states and 12348 transitions. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-11-06 22:53:17,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:17,728 INFO L93 Difference]: Finished difference Result 14586 states and 24699 transitions. [2023-11-06 22:53:17,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:53:17,729 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) Word has length 648 [2023-11-06 22:53:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:17,757 INFO L225 Difference]: With dead ends: 14586 [2023-11-06 22:53:17,757 INFO L226 Difference]: Without dead ends: 7390 [2023-11-06 22:53:17,779 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1298 GetRequests, 1288 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 22:53:17,780 INFO L413 NwaCegarLoop]: 429 mSDtfsCounter, 353 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 1087 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:17,781 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [426 Valid, 1087 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:53:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7390 states. [2023-11-06 22:53:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7390 to 7314. [2023-11-06 22:53:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7314 states, 5868 states have (on average 1.634628493524199) internal successors, (9592), 5881 states have internal predecessors, (9592), 1372 states have call successors, (1372), 73 states have call predecessors, (1372), 73 states have return successors, (1372), 1359 states have call predecessors, (1372), 1372 states have call successors, (1372) [2023-11-06 22:53:18,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7314 states to 7314 states and 12336 transitions. [2023-11-06 22:53:18,642 INFO L78 Accepts]: Start accepts. Automaton has 7314 states and 12336 transitions. Word has length 648 [2023-11-06 22:53:18,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:18,644 INFO L495 AbstractCegarLoop]: Abstraction has 7314 states and 12336 transitions. [2023-11-06 22:53:18,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 2 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 2 states have call predecessors, (125), 2 states have call successors, (125) [2023-11-06 22:53:18,645 INFO L276 IsEmpty]: Start isEmpty. Operand 7314 states and 12336 transitions. [2023-11-06 22:53:18,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2023-11-06 22:53:18,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:18,661 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:18,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-06 22:53:18,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:18,870 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:18,870 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:18,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1204927674, now seen corresponding path program 1 times [2023-11-06 22:53:18,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:18,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966955963] [2023-11-06 22:53:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:18,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:18,949 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:18,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446356791] [2023-11-06 22:53:18,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:18,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:18,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:18,952 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:18,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-06 22:53:19,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:19,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 1577 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:53:19,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:21,222 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-06 22:53:21,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:21,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:21,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966955963] [2023-11-06 22:53:21,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:21,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446356791] [2023-11-06 22:53:21,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446356791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:21,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:21,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:53:21,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613302314] [2023-11-06 22:53:21,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:21,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:53:21,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:21,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:53:21,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:53:21,228 INFO L87 Difference]: Start difference. First operand 7314 states and 12336 transitions. Second operand has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 5 states have internal predecessors, (157), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:53:24,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:24,828 INFO L93 Difference]: Finished difference Result 29118 states and 48128 transitions. [2023-11-06 22:53:24,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:53:24,829 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 5 states have internal predecessors, (157), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 649 [2023-11-06 22:53:24,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:24,912 INFO L225 Difference]: With dead ends: 29118 [2023-11-06 22:53:24,913 INFO L226 Difference]: Without dead ends: 21874 [2023-11-06 22:53:24,933 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 644 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:53:24,935 INFO L413 NwaCegarLoop]: 789 mSDtfsCounter, 1395 mSDsluCounter, 1934 mSDsCounter, 0 mSdLazyCounter, 1035 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1395 SdHoareTripleChecker+Valid, 2723 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1035 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:24,935 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1395 Valid, 2723 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1035 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-06 22:53:24,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21874 states. [2023-11-06 22:53:26,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21874 to 19028. [2023-11-06 22:53:26,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19028 states, 15734 states have (on average 1.6165628575060378) internal successors, (25435), 15798 states have internal predecessors, (25435), 3113 states have call successors, (3113), 180 states have call predecessors, (3113), 180 states have return successors, (3113), 3049 states have call predecessors, (3113), 3113 states have call successors, (3113) [2023-11-06 22:53:26,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19028 states to 19028 states and 31661 transitions. [2023-11-06 22:53:26,986 INFO L78 Accepts]: Start accepts. Automaton has 19028 states and 31661 transitions. Word has length 649 [2023-11-06 22:53:26,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:26,987 INFO L495 AbstractCegarLoop]: Abstraction has 19028 states and 31661 transitions. [2023-11-06 22:53:26,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.166666666666668) internal successors, (157), 5 states have internal predecessors, (157), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:53:26,988 INFO L276 IsEmpty]: Start isEmpty. Operand 19028 states and 31661 transitions. [2023-11-06 22:53:27,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 650 [2023-11-06 22:53:27,016 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:27,016 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:27,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:27,226 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-06 22:53:27,227 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:27,228 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:27,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1142888060, now seen corresponding path program 1 times [2023-11-06 22:53:27,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:27,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12765647] [2023-11-06 22:53:27,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:27,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:27,316 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:27,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [21530319] [2023-11-06 22:53:27,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:27,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:27,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:27,318 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:27,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-06 22:53:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:27,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:53:27,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 3948 proven. 261 refuted. 0 times theorem prover too weak. 15195 trivial. 0 not checked. [2023-11-06 22:53:28,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:29,464 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 33 proven. 261 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-06 22:53:29,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:29,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12765647] [2023-11-06 22:53:29,465 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:29,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21530319] [2023-11-06 22:53:29,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21530319] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:29,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:53:29,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:53:29,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125004289] [2023-11-06 22:53:29,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:29,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:53:29,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:29,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:53:29,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:53:29,471 INFO L87 Difference]: Start difference. First operand 19028 states and 31661 transitions. Second operand has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 2 states have call successors, (186), 2 states have call predecessors, (186), 4 states have return successors, (187), 2 states have call predecessors, (187), 2 states have call successors, (187) [2023-11-06 22:53:31,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:31,379 INFO L93 Difference]: Finished difference Result 38728 states and 63869 transitions. [2023-11-06 22:53:31,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:53:31,380 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 2 states have call successors, (186), 2 states have call predecessors, (186), 4 states have return successors, (187), 2 states have call predecessors, (187), 2 states have call successors, (187) Word has length 649 [2023-11-06 22:53:31,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:31,451 INFO L225 Difference]: With dead ends: 38728 [2023-11-06 22:53:31,452 INFO L226 Difference]: Without dead ends: 19774 [2023-11-06 22:53:31,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1300 GetRequests, 1290 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 22:53:31,491 INFO L413 NwaCegarLoop]: 422 mSDtfsCounter, 545 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 555 SdHoareTripleChecker+Valid, 1066 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:31,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [555 Valid, 1066 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-06 22:53:31,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19774 states. [2023-11-06 22:53:33,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19774 to 19075. [2023-11-06 22:53:33,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19075 states, 15823 states have (on average 1.5983062630348228) internal successors, (25290), 15887 states have internal predecessors, (25290), 3027 states have call successors, (3027), 224 states have call predecessors, (3027), 224 states have return successors, (3027), 2963 states have call predecessors, (3027), 3027 states have call successors, (3027) [2023-11-06 22:53:33,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19075 states to 19075 states and 31344 transitions. [2023-11-06 22:53:33,113 INFO L78 Accepts]: Start accepts. Automaton has 19075 states and 31344 transitions. Word has length 649 [2023-11-06 22:53:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:33,114 INFO L495 AbstractCegarLoop]: Abstraction has 19075 states and 31344 transitions. [2023-11-06 22:53:33,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 2 states have call successors, (186), 2 states have call predecessors, (186), 4 states have return successors, (187), 2 states have call predecessors, (187), 2 states have call successors, (187) [2023-11-06 22:53:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 19075 states and 31344 transitions. [2023-11-06 22:53:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2023-11-06 22:53:33,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:33,136 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:33,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:33,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-06 22:53:33,345 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:33,346 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:33,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1063231443, now seen corresponding path program 1 times [2023-11-06 22:53:33,346 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:33,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375929578] [2023-11-06 22:53:33,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:33,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:33,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:33,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1287700424] [2023-11-06 22:53:33,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:33,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:33,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:33,431 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:33,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-06 22:53:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:34,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:53:34,165 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-06 22:53:35,241 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:35,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:35,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375929578] [2023-11-06 22:53:35,242 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:35,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287700424] [2023-11-06 22:53:35,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287700424] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:35,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:35,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:53:35,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368039827] [2023-11-06 22:53:35,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:35,248 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:53:35,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:35,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:53:35,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:53:35,250 INFO L87 Difference]: Start difference. First operand 19075 states and 31344 transitions. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:53:38,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:38,811 INFO L93 Difference]: Finished difference Result 49846 states and 80744 transitions. [2023-11-06 22:53:38,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:53:38,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 650 [2023-11-06 22:53:38,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:38,910 INFO L225 Difference]: With dead ends: 49846 [2023-11-06 22:53:38,911 INFO L226 Difference]: Without dead ends: 30849 [2023-11-06 22:53:38,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2023-11-06 22:53:38,948 INFO L413 NwaCegarLoop]: 1005 mSDtfsCounter, 810 mSDsluCounter, 1815 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 2820 SdHoareTripleChecker+Invalid, 952 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:38,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [810 Valid, 2820 Invalid, 952 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-06 22:53:38,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30849 states. [2023-11-06 22:53:41,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30849 to 21805. [2023-11-06 22:53:41,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21805 states, 17608 states have (on average 1.589902317128578) internal successors, (27995), 17674 states have internal predecessors, (27995), 3845 states have call successors, (3845), 351 states have call predecessors, (3845), 351 states have return successors, (3845), 3779 states have call predecessors, (3845), 3845 states have call successors, (3845) [2023-11-06 22:53:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21805 states to 21805 states and 35685 transitions. [2023-11-06 22:53:41,769 INFO L78 Accepts]: Start accepts. Automaton has 21805 states and 35685 transitions. Word has length 650 [2023-11-06 22:53:41,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:41,770 INFO L495 AbstractCegarLoop]: Abstraction has 21805 states and 35685 transitions. [2023-11-06 22:53:41,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:53:41,771 INFO L276 IsEmpty]: Start isEmpty. Operand 21805 states and 35685 transitions. [2023-11-06 22:53:41,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2023-11-06 22:53:41,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:41,792 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:41,807 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:42,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-06 22:53:42,002 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:42,003 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:42,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1757099630, now seen corresponding path program 1 times [2023-11-06 22:53:42,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:42,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145605908] [2023-11-06 22:53:42,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:42,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:42,095 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:42,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525383226] [2023-11-06 22:53:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:42,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:42,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:42,097 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:42,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-06 22:53:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:42,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 1582 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:53:42,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:43,311 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 9150 proven. 108 refuted. 0 times theorem prover too weak. 10146 trivial. 0 not checked. [2023-11-06 22:53:43,311 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 186 proven. 108 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-06 22:53:43,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:43,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145605908] [2023-11-06 22:53:43,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:43,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525383226] [2023-11-06 22:53:43,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525383226] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:43,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:53:43,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:53:43,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293154001] [2023-11-06 22:53:43,813 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:43,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:53:43,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:43,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:53:43,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:53:43,816 INFO L87 Difference]: Start difference. First operand 21805 states and 35685 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-06 22:53:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:45,734 INFO L93 Difference]: Finished difference Result 22279 states and 36144 transitions. [2023-11-06 22:53:45,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:53:45,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) Word has length 650 [2023-11-06 22:53:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:45,782 INFO L225 Difference]: With dead ends: 22279 [2023-11-06 22:53:45,783 INFO L226 Difference]: Without dead ends: 14814 [2023-11-06 22:53:45,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1302 GetRequests, 1292 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 22:53:45,802 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 611 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 495 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 1065 SdHoareTripleChecker+Invalid, 626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:45,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 1065 Invalid, 626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 495 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:53:45,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14814 states. [2023-11-06 22:53:47,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14814 to 14398. [2023-11-06 22:53:47,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14398 states, 11447 states have (on average 1.5685332401502576) internal successors, (17955), 11488 states have internal predecessors, (17955), 2672 states have call successors, (2672), 278 states have call predecessors, (2672), 278 states have return successors, (2672), 2631 states have call predecessors, (2672), 2672 states have call successors, (2672) [2023-11-06 22:53:47,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14398 states to 14398 states and 23299 transitions. [2023-11-06 22:53:47,764 INFO L78 Accepts]: Start accepts. Automaton has 14398 states and 23299 transitions. Word has length 650 [2023-11-06 22:53:47,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:47,765 INFO L495 AbstractCegarLoop]: Abstraction has 14398 states and 23299 transitions. [2023-11-06 22:53:47,765 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-06 22:53:47,765 INFO L276 IsEmpty]: Start isEmpty. Operand 14398 states and 23299 transitions. [2023-11-06 22:53:47,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2023-11-06 22:53:47,777 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:47,777 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:47,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:47,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-06 22:53:47,978 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:47,978 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:47,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1154398955, now seen corresponding path program 1 times [2023-11-06 22:53:47,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:47,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360342476] [2023-11-06 22:53:47,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:47,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:48,058 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:48,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208169861] [2023-11-06 22:53:48,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:48,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:48,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:48,060 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:48,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-06 22:53:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:48,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 22:53:48,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-06 22:53:50,381 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:53:50,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:50,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360342476] [2023-11-06 22:53:50,382 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:50,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208169861] [2023-11-06 22:53:50,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208169861] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:53:50,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:53:50,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:53:50,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720747169] [2023-11-06 22:53:50,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:53:50,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:53:50,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:50,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:53:50,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:53:50,386 INFO L87 Difference]: Start difference. First operand 14398 states and 23299 transitions. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:53:52,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:52,856 INFO L93 Difference]: Finished difference Result 35367 states and 57653 transitions. [2023-11-06 22:53:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 22:53:52,860 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 650 [2023-11-06 22:53:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:52,917 INFO L225 Difference]: With dead ends: 35367 [2023-11-06 22:53:52,917 INFO L226 Difference]: Without dead ends: 20879 [2023-11-06 22:53:52,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 652 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-06 22:53:52,950 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 1060 mSDsluCounter, 1213 mSDsCounter, 0 mSdLazyCounter, 701 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1060 SdHoareTripleChecker+Valid, 1766 SdHoareTripleChecker+Invalid, 819 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:52,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1060 Valid, 1766 Invalid, 819 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 701 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-06 22:53:52,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20879 states. [2023-11-06 22:53:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20879 to 17810. [2023-11-06 22:53:55,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17810 states, 15259 states have (on average 1.6613146339864997) internal successors, (25350), 15275 states have internal predecessors, (25350), 2322 states have call successors, (2322), 228 states have call predecessors, (2322), 228 states have return successors, (2322), 2306 states have call predecessors, (2322), 2322 states have call successors, (2322) [2023-11-06 22:53:55,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17810 states to 17810 states and 29994 transitions. [2023-11-06 22:53:55,080 INFO L78 Accepts]: Start accepts. Automaton has 17810 states and 29994 transitions. Word has length 650 [2023-11-06 22:53:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:53:55,082 INFO L495 AbstractCegarLoop]: Abstraction has 17810 states and 29994 transitions. [2023-11-06 22:53:55,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 5 states have internal predecessors, (158), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:53:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 17810 states and 29994 transitions. [2023-11-06 22:53:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2023-11-06 22:53:55,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:53:55,103 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:53:55,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-06 22:53:55,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-06 22:53:55,313 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:53:55,314 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:53:55,314 INFO L85 PathProgramCache]: Analyzing trace with hash -1288825127, now seen corresponding path program 1 times [2023-11-06 22:53:55,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:53:55,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583339077] [2023-11-06 22:53:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:55,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:53:55,414 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:53:55,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [911045894] [2023-11-06 22:53:55,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:53:55,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:53:55,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:53:55,416 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:53:55,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-06 22:53:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:53:56,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 1579 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:53:56,059 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:53:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 5108 proven. 249 refuted. 0 times theorem prover too weak. 14047 trivial. 0 not checked. [2023-11-06 22:53:57,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:53:57,813 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 45 proven. 249 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-06 22:53:57,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:53:57,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583339077] [2023-11-06 22:53:57,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:53:57,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911045894] [2023-11-06 22:53:57,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911045894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:53:57,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:53:57,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-06 22:53:57,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214902606] [2023-11-06 22:53:57,816 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:53:57,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-06 22:53:57,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:53:57,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-06 22:53:57,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-06 22:53:57,820 INFO L87 Difference]: Start difference. First operand 17810 states and 29994 transitions. Second operand has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 2 states have call successors, (182), 2 states have call predecessors, (182), 4 states have return successors, (183), 2 states have call predecessors, (183), 2 states have call successors, (183) [2023-11-06 22:53:59,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:53:59,597 INFO L93 Difference]: Finished difference Result 36038 states and 60339 transitions. [2023-11-06 22:53:59,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-06 22:53:59,600 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 2 states have call successors, (182), 2 states have call predecessors, (182), 4 states have return successors, (183), 2 states have call predecessors, (183), 2 states have call successors, (183) Word has length 650 [2023-11-06 22:53:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:53:59,635 INFO L225 Difference]: With dead ends: 36038 [2023-11-06 22:53:59,635 INFO L226 Difference]: Without dead ends: 13182 [2023-11-06 22:53:59,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1302 GetRequests, 1292 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 22:53:59,662 INFO L413 NwaCegarLoop]: 418 mSDtfsCounter, 434 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-06 22:53:59,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 1055 Invalid, 547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-06 22:53:59,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13182 states. [2023-11-06 22:54:01,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13182 to 11150. [2023-11-06 22:54:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11150 states, 8569 states have (on average 1.5530400280079355) internal successors, (13308), 8585 states have internal predecessors, (13308), 2322 states have call successors, (2322), 258 states have call predecessors, (2322), 258 states have return successors, (2322), 2306 states have call predecessors, (2322), 2322 states have call successors, (2322) [2023-11-06 22:54:01,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11150 states to 11150 states and 17952 transitions. [2023-11-06 22:54:01,454 INFO L78 Accepts]: Start accepts. Automaton has 11150 states and 17952 transitions. Word has length 650 [2023-11-06 22:54:01,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:01,455 INFO L495 AbstractCegarLoop]: Abstraction has 11150 states and 17952 transitions. [2023-11-06 22:54:01,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.857142857142858) internal successors, (167), 7 states have internal predecessors, (167), 2 states have call successors, (182), 2 states have call predecessors, (182), 4 states have return successors, (183), 2 states have call predecessors, (183), 2 states have call successors, (183) [2023-11-06 22:54:01,455 INFO L276 IsEmpty]: Start isEmpty. Operand 11150 states and 17952 transitions. [2023-11-06 22:54:01,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 651 [2023-11-06 22:54:01,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:01,468 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:01,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:01,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-06 22:54:01,678 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:01,678 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:01,678 INFO L85 PathProgramCache]: Analyzing trace with hash -45172173, now seen corresponding path program 1 times [2023-11-06 22:54:01,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:01,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197937334] [2023-11-06 22:54:01,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:01,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:01,799 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:54:01,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [268680879] [2023-11-06 22:54:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:01,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:01,801 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:01,804 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:01,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-06 22:54:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:02,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 1581 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 22:54:02,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:04,445 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 9420 proven. 117 refuted. 0 times theorem prover too weak. 9867 trivial. 0 not checked. [2023-11-06 22:54:04,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:05,348 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 177 proven. 117 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-06 22:54:05,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:05,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197937334] [2023-11-06 22:54:05,349 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:54:05,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268680879] [2023-11-06 22:54:05,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268680879] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:05,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:54:05,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-06 22:54:05,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191990178] [2023-11-06 22:54:05,351 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:05,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-06 22:54:05,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:05,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-06 22:54:05,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2023-11-06 22:54:05,356 INFO L87 Difference]: Start difference. First operand 11150 states and 17952 transitions. Second operand has 16 states, 16 states have (on average 16.5625) internal successors, (265), 16 states have internal predecessors, (265), 4 states have call successors, (198), 3 states have call predecessors, (198), 5 states have return successors, (198), 4 states have call predecessors, (198), 4 states have call successors, (198) [2023-11-06 22:54:11,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:11,697 INFO L93 Difference]: Finished difference Result 25117 states and 39110 transitions. [2023-11-06 22:54:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-06 22:54:11,697 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 16.5625) internal successors, (265), 16 states have internal predecessors, (265), 4 states have call successors, (198), 3 states have call predecessors, (198), 5 states have return successors, (198), 4 states have call predecessors, (198), 4 states have call successors, (198) Word has length 650 [2023-11-06 22:54:11,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:11,736 INFO L225 Difference]: With dead ends: 25117 [2023-11-06 22:54:11,736 INFO L226 Difference]: Without dead ends: 13909 [2023-11-06 22:54:11,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1325 GetRequests, 1288 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=445, Invalid=1037, Unknown=0, NotChecked=0, Total=1482 [2023-11-06 22:54:11,761 INFO L413 NwaCegarLoop]: 808 mSDtfsCounter, 1695 mSDsluCounter, 3407 mSDsCounter, 0 mSdLazyCounter, 2354 mSolverCounterSat, 842 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1714 SdHoareTripleChecker+Valid, 4215 SdHoareTripleChecker+Invalid, 3196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 842 IncrementalHoareTripleChecker+Valid, 2354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:11,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1714 Valid, 4215 Invalid, 3196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [842 Valid, 2354 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-06 22:54:11,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13909 states. [2023-11-06 22:54:14,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13909 to 10031. [2023-11-06 22:54:14,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10031 states, 7458 states have (on average 1.5084473049074818) internal successors, (11250), 7472 states have internal predecessors, (11250), 2240 states have call successors, (2240), 332 states have call predecessors, (2240), 332 states have return successors, (2240), 2226 states have call predecessors, (2240), 2240 states have call successors, (2240) [2023-11-06 22:54:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10031 states to 10031 states and 15730 transitions. [2023-11-06 22:54:14,067 INFO L78 Accepts]: Start accepts. Automaton has 10031 states and 15730 transitions. Word has length 650 [2023-11-06 22:54:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:14,068 INFO L495 AbstractCegarLoop]: Abstraction has 10031 states and 15730 transitions. [2023-11-06 22:54:14,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.5625) internal successors, (265), 16 states have internal predecessors, (265), 4 states have call successors, (198), 3 states have call predecessors, (198), 5 states have return successors, (198), 4 states have call predecessors, (198), 4 states have call successors, (198) [2023-11-06 22:54:14,069 INFO L276 IsEmpty]: Start isEmpty. Operand 10031 states and 15730 transitions. [2023-11-06 22:54:14,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2023-11-06 22:54:14,077 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:14,078 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:14,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:14,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-06 22:54:14,278 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:14,279 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:14,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1681122669, now seen corresponding path program 1 times [2023-11-06 22:54:14,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:14,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808124261] [2023-11-06 22:54:14,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:14,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:14,371 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:54:14,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [367742833] [2023-11-06 22:54:14,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:14,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:14,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:14,374 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:14,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-06 22:54:15,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:15,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 1578 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-06 22:54:15,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:17,717 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19404 trivial. 0 not checked. [2023-11-06 22:54:17,717 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 22:54:17,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:17,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808124261] [2023-11-06 22:54:17,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:54:17,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367742833] [2023-11-06 22:54:17,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367742833] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 22:54:17,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 22:54:17,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-06 22:54:17,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403546649] [2023-11-06 22:54:17,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 22:54:17,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-06 22:54:17,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:17,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-06 22:54:17,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-06 22:54:17,722 INFO L87 Difference]: Start difference. First operand 10031 states and 15730 transitions. Second operand has 6 states, 6 states have (on average 26.5) internal successors, (159), 5 states have internal predecessors, (159), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:54:33,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 22:54:33,962 INFO L93 Difference]: Finished difference Result 88371 states and 137812 transitions. [2023-11-06 22:54:33,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-06 22:54:33,963 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 26.5) internal successors, (159), 5 states have internal predecessors, (159), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) Word has length 651 [2023-11-06 22:54:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 22:54:34,146 INFO L225 Difference]: With dead ends: 88371 [2023-11-06 22:54:34,147 INFO L226 Difference]: Without dead ends: 78343 [2023-11-06 22:54:34,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 656 GetRequests, 646 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2023-11-06 22:54:34,195 INFO L413 NwaCegarLoop]: 667 mSDtfsCounter, 2970 mSDsluCounter, 3411 mSDsCounter, 0 mSdLazyCounter, 1482 mSolverCounterSat, 559 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2970 SdHoareTripleChecker+Valid, 4078 SdHoareTripleChecker+Invalid, 2041 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 559 IncrementalHoareTripleChecker+Valid, 1482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-06 22:54:34,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2970 Valid, 4078 Invalid, 2041 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [559 Valid, 1482 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-06 22:54:34,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78343 states. [2023-11-06 22:54:48,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78343 to 77653. [2023-11-06 22:54:48,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77653 states, 59436 states have (on average 1.503667810754425) internal successors, (89372), 59660 states have internal predecessors, (89372), 15624 states have call successors, (15624), 2592 states have call predecessors, (15624), 2592 states have return successors, (15624), 15400 states have call predecessors, (15624), 15624 states have call successors, (15624) [2023-11-06 22:54:49,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77653 states to 77653 states and 120620 transitions. [2023-11-06 22:54:49,218 INFO L78 Accepts]: Start accepts. Automaton has 77653 states and 120620 transitions. Word has length 651 [2023-11-06 22:54:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 22:54:49,219 INFO L495 AbstractCegarLoop]: Abstraction has 77653 states and 120620 transitions. [2023-11-06 22:54:49,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.5) internal successors, (159), 5 states have internal predecessors, (159), 1 states have call successors, (99), 1 states have call predecessors, (99), 1 states have return successors, (99), 1 states have call predecessors, (99), 1 states have call successors, (99) [2023-11-06 22:54:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 77653 states and 120620 transitions. [2023-11-06 22:54:49,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2023-11-06 22:54:49,260 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 22:54:49,261 INFO L195 NwaCegarLoop]: trace histogram [99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 22:54:49,271 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-06 22:54:49,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:49,464 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-06 22:54:49,464 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 22:54:49,465 INFO L85 PathProgramCache]: Analyzing trace with hash -994869713, now seen corresponding path program 1 times [2023-11-06 22:54:49,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-06 22:54:49,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158731742] [2023-11-06 22:54:49,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:49,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 22:54:49,577 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-06 22:54:49,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1314923894] [2023-11-06 22:54:49,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 22:54:49,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 22:54:49,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 [2023-11-06 22:54:49,580 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 22:54:49,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3cc0a3b1-7b7d-4a43-ae02-b987e3c89bc2/bin/uautomizer-verify-WvqO1wxjHP/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-06 22:54:50,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 22:54:50,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 1580 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 22:54:50,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 22:54:52,264 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 9780 proven. 153 refuted. 0 times theorem prover too weak. 9471 trivial. 0 not checked. [2023-11-06 22:54:52,264 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 22:54:53,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19404 backedges. 141 proven. 153 refuted. 0 times theorem prover too weak. 19110 trivial. 0 not checked. [2023-11-06 22:54:53,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-06 22:54:53,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158731742] [2023-11-06 22:54:53,319 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-06 22:54:53,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314923894] [2023-11-06 22:54:53,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314923894] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 22:54:53,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-06 22:54:53,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-06 22:54:53,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802529205] [2023-11-06 22:54:53,320 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-06 22:54:53,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-06 22:54:53,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-06 22:54:53,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-06 22:54:53,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-06 22:54:53,325 INFO L87 Difference]: Start difference. First operand 77653 states and 120620 transitions. Second operand has 14 states, 14 states have (on average 20.357142857142858) internal successors, (285), 14 states have internal predecessors, (285), 4 states have call successors, (198), 3 states have call predecessors, (198), 5 states have return successors, (198), 4 states have call predecessors, (198), 4 states have call successors, (198)