./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-28.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff 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_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-28.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e3e490624669738192d84194857eb5010bb4c249ca7cd2d385528db4c6ad1bc5 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:37:13,156 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:37:13,280 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:37:13,290 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:37:13,291 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:37:13,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:37:13,334 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:37:13,335 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:37:13,336 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:37:13,341 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:37:13,343 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:37:13,343 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:37:13,344 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:37:13,346 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:37:13,346 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:37:13,347 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:37:13,347 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:37:13,347 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:37:13,348 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:37:13,349 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:37:13,349 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:37:13,350 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:37:13,350 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:37:13,351 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:37:13,351 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:37:13,352 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:37:13,352 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:37:13,353 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:37:13,353 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:13,354 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:37:13,355 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:37:13,355 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:37:13,356 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:37:13,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:37:13,356 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:37:13,356 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:37:13,357 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:37:13,357 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:37:13,357 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:37:13,357 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_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e3e490624669738192d84194857eb5010bb4c249ca7cd2d385528db4c6ad1bc5 [2023-11-19 07:37:13,742 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:37:13,763 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:37:13,766 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:37:13,767 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:37:13,768 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:37:13,769 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-28.i [2023-11-19 07:37:16,831 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:37:17,195 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:37:17,196 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-28.i [2023-11-19 07:37:17,228 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/data/49251bdd8/dcb0ecd7f1d241c390c9299923a76c81/FLAGd46b091e4 [2023-11-19 07:37:17,268 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/data/49251bdd8/dcb0ecd7f1d241c390c9299923a76c81 [2023-11-19 07:37:17,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:37:17,276 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:37:17,280 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:17,280 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:37:17,286 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:37:17,287 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:17" (1/1) ... [2023-11-19 07:37:17,288 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b6f05ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17, skipping insertion in model container [2023-11-19 07:37:17,288 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:17" (1/1) ... [2023-11-19 07:37:17,362 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:37:17,510 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_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-28.i[916,929] [2023-11-19 07:37:17,802 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:17,824 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:37:17,835 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_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-500_file-28.i[916,929] [2023-11-19 07:37:17,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:17,966 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:37:17,967 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17 WrapperNode [2023-11-19 07:37:17,967 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:17,969 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:17,969 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:37:17,969 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:37:17,977 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17" (1/1) ... [2023-11-19 07:37:18,012 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17" (1/1) ... [2023-11-19 07:37:18,145 INFO L138 Inliner]: procedures = 26, calls = 141, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 989 [2023-11-19 07:37:18,145 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:18,146 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:37:18,146 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:37:18,147 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:37:18,157 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17" (1/1) ... [2023-11-19 07:37:18,158 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17" (1/1) ... [2023-11-19 07:37:18,202 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17" (1/1) ... [2023-11-19 07:37:18,203 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17" (1/1) ... [2023-11-19 07:37:18,245 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17" (1/1) ... [2023-11-19 07:37:18,275 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17" (1/1) ... [2023-11-19 07:37:18,288 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17" (1/1) ... [2023-11-19 07:37:18,298 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17" (1/1) ... [2023-11-19 07:37:18,326 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:37:18,334 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:37:18,335 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:37:18,335 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:37:18,336 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17" (1/1) ... [2023-11-19 07:37:18,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:18,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:18,422 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:37:18,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:37:18,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:37:18,486 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:37:18,486 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:37:18,486 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:37:18,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:37:18,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:37:18,715 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:37:18,717 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:37:20,184 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:37:20,216 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:37:20,217 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:37:20,229 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:20 BoogieIcfgContainer [2023-11-19 07:37:20,230 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:37:20,234 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:37:20,235 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:37:20,238 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:37:20,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:37:17" (1/3) ... [2023-11-19 07:37:20,239 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b994b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:20, skipping insertion in model container [2023-11-19 07:37:20,239 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:17" (2/3) ... [2023-11-19 07:37:20,241 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b994b76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:20, skipping insertion in model container [2023-11-19 07:37:20,241 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:20" (3/3) ... [2023-11-19 07:37:20,242 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-500_file-28.i [2023-11-19 07:37:20,263 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:37:20,263 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:37:20,341 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:20,349 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@2a9508b9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:20,350 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:37:20,360 INFO L276 IsEmpty]: Start isEmpty. Operand has 391 states, 260 states have (on average 1.6115384615384616) internal successors, (419), 261 states have internal predecessors, (419), 128 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-19 07:37:20,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 805 [2023-11-19 07:37:20,436 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:20,439 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:20,440 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:20,448 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:20,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1247059676, now seen corresponding path program 1 times [2023-11-19 07:37:20,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:20,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667314759] [2023-11-19 07:37:20,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:20,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:20,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:20,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:20,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667314759] [2023-11-19 07:37:20,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:37:20,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089579192] [2023-11-19 07:37:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:20,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:20,957 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:20,959 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:20,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:37:21,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:21,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:37:21,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:21,798 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 254 proven. 0 refuted. 0 times theorem prover too weak. 32258 trivial. 0 not checked. [2023-11-19 07:37:21,798 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:21,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089579192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:21,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:21,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:21,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337711312] [2023-11-19 07:37:21,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:21,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:37:21,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:21,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:37:21,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:37:21,853 INFO L87 Difference]: Start difference. First operand has 391 states, 260 states have (on average 1.6115384615384616) internal successors, (419), 261 states have internal predecessors, (419), 128 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) Second operand has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (128), 2 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 2 states have call successors, (128) [2023-11-19 07:37:21,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:21,936 INFO L93 Difference]: Finished difference Result 761 states and 1445 transitions. [2023-11-19 07:37:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:37:21,939 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (128), 2 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 2 states have call successors, (128) Word has length 804 [2023-11-19 07:37:21,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:21,954 INFO L225 Difference]: With dead ends: 761 [2023-11-19 07:37:21,954 INFO L226 Difference]: Without dead ends: 373 [2023-11-19 07:37:21,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 803 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:37:21,967 INFO L413 NwaCegarLoop]: 637 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, 637 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 [2023-11-19 07:37:21,968 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 637 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:21,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2023-11-19 07:37:22,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 373. [2023-11-19 07:37:22,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 243 states have (on average 1.5679012345679013) internal successors, (381), 243 states have internal predecessors, (381), 128 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-19 07:37:22,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 637 transitions. [2023-11-19 07:37:22,123 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 637 transitions. Word has length 804 [2023-11-19 07:37:22,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:22,124 INFO L495 AbstractCegarLoop]: Abstraction has 373 states and 637 transitions. [2023-11-19 07:37:22,124 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 84.5) internal successors, (169), 2 states have internal predecessors, (169), 2 states have call successors, (128), 2 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 2 states have call successors, (128) [2023-11-19 07:37:22,125 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 637 transitions. [2023-11-19 07:37:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-19 07:37:22,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:22,158 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:22,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:22,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:37:22,383 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:22,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:22,384 INFO L85 PathProgramCache]: Analyzing trace with hash -649592639, now seen corresponding path program 1 times [2023-11-19 07:37:22,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:22,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644485931] [2023-11-19 07:37:22,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:22,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:22,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:22,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1557039189] [2023-11-19 07:37:22,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:22,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:22,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:22,637 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:22,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:37:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:23,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:23,234 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:23,393 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-19 07:37:23,394 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:23,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:23,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644485931] [2023-11-19 07:37:23,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:23,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557039189] [2023-11-19 07:37:23,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557039189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:23,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:23,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:23,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818488712] [2023-11-19 07:37:23,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:23,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:23,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:23,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:23,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:23,402 INFO L87 Difference]: Start difference. First operand 373 states and 637 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:23,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:23,506 INFO L93 Difference]: Finished difference Result 744 states and 1273 transitions. [2023-11-19 07:37:23,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:23,508 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-19 07:37:23,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:23,517 INFO L225 Difference]: With dead ends: 744 [2023-11-19 07:37:23,517 INFO L226 Difference]: Without dead ends: 374 [2023-11-19 07:37:23,519 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:23,521 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 0 mSDsluCounter, 630 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:23,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1266 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-19 07:37:23,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 374. [2023-11-19 07:37:23,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 374 states, 244 states have (on average 1.5655737704918034) internal successors, (382), 244 states have internal predecessors, (382), 128 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 128 states have call predecessors, (128), 128 states have call successors, (128) [2023-11-19 07:37:23,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 374 states to 374 states and 638 transitions. [2023-11-19 07:37:23,589 INFO L78 Accepts]: Start accepts. Automaton has 374 states and 638 transitions. Word has length 805 [2023-11-19 07:37:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:23,597 INFO L495 AbstractCegarLoop]: Abstraction has 374 states and 638 transitions. [2023-11-19 07:37:23,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:23,599 INFO L276 IsEmpty]: Start isEmpty. Operand 374 states and 638 transitions. [2023-11-19 07:37:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-19 07:37:23,611 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:23,612 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:23,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:23,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:23,836 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:23,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1546985917, now seen corresponding path program 1 times [2023-11-19 07:37:23,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:23,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019440292] [2023-11-19 07:37:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:23,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:24,002 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:24,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1925480008] [2023-11-19 07:37:24,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:24,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:24,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:24,009 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:24,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:37:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:24,656 INFO L262 TraceCheckSpWp]: Trace formula consists of 1890 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:24,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-19 07:37:24,827 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:24,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:24,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019440292] [2023-11-19 07:37:24,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:24,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925480008] [2023-11-19 07:37:24,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925480008] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:24,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:24,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:24,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467115354] [2023-11-19 07:37:24,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:24,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:24,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:24,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:24,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:24,836 INFO L87 Difference]: Start difference. First operand 374 states and 638 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:24,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:24,933 INFO L93 Difference]: Finished difference Result 1116 states and 1908 transitions. [2023-11-19 07:37:24,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:24,934 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-19 07:37:24,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:24,946 INFO L225 Difference]: With dead ends: 1116 [2023-11-19 07:37:24,947 INFO L226 Difference]: Without dead ends: 745 [2023-11-19 07:37:24,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:24,953 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 588 mSDsluCounter, 625 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:24,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1258 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:24,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745 states. [2023-11-19 07:37:25,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745 to 743. [2023-11-19 07:37:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 484 states have (on average 1.5661157024793388) internal successors, (758), 484 states have internal predecessors, (758), 256 states have call successors, (256), 2 states have call predecessors, (256), 2 states have return successors, (256), 256 states have call predecessors, (256), 256 states have call successors, (256) [2023-11-19 07:37:25,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 1270 transitions. [2023-11-19 07:37:25,164 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 1270 transitions. Word has length 805 [2023-11-19 07:37:25,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:25,169 INFO L495 AbstractCegarLoop]: Abstraction has 743 states and 1270 transitions. [2023-11-19 07:37:25,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:25,170 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 1270 transitions. [2023-11-19 07:37:25,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-19 07:37:25,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:25,180 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:25,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:25,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:25,409 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:25,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:25,410 INFO L85 PathProgramCache]: Analyzing trace with hash -2056459007, now seen corresponding path program 1 times [2023-11-19 07:37:25,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:25,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551459636] [2023-11-19 07:37:25,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:25,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:25,592 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:25,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478590225] [2023-11-19 07:37:25,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:25,593 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:25,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:25,595 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:25,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:37:26,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:26,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 1889 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:26,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-19 07:37:26,420 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:26,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:26,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551459636] [2023-11-19 07:37:26,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:26,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478590225] [2023-11-19 07:37:26,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478590225] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:26,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:26,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:26,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136263331] [2023-11-19 07:37:26,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:26,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:26,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:26,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:26,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:26,427 INFO L87 Difference]: Start difference. First operand 743 states and 1270 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:26,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:26,549 INFO L93 Difference]: Finished difference Result 1983 states and 3388 transitions. [2023-11-19 07:37:26,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:26,551 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-19 07:37:26,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:26,567 INFO L225 Difference]: With dead ends: 1983 [2023-11-19 07:37:26,567 INFO L226 Difference]: Without dead ends: 1243 [2023-11-19 07:37:26,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:26,580 INFO L413 NwaCegarLoop]: 842 mSDtfsCounter, 383 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 1464 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:26,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [383 Valid, 1464 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:26,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2023-11-19 07:37:26,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1239. [2023-11-19 07:37:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1239 states, 818 states have (on average 1.5672371638141809) internal successors, (1282), 820 states have internal predecessors, (1282), 416 states have call successors, (416), 4 states have call predecessors, (416), 4 states have return successors, (416), 414 states have call predecessors, (416), 416 states have call successors, (416) [2023-11-19 07:37:26,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 2114 transitions. [2023-11-19 07:37:26,896 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 2114 transitions. Word has length 805 [2023-11-19 07:37:26,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:26,898 INFO L495 AbstractCegarLoop]: Abstraction has 1239 states and 2114 transitions. [2023-11-19 07:37:26,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:26,899 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 2114 transitions. [2023-11-19 07:37:26,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-19 07:37:26,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:26,910 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:26,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:27,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:27,125 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:27,125 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:27,126 INFO L85 PathProgramCache]: Analyzing trace with hash 2104494783, now seen corresponding path program 1 times [2023-11-19 07:37:27,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:27,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200007202] [2023-11-19 07:37:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:27,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:27,291 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:27,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [891008243] [2023-11-19 07:37:27,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:27,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:27,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:27,294 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:27,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:37:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:27,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 1888 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:27,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-19 07:37:28,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:28,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:28,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200007202] [2023-11-19 07:37:28,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:28,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891008243] [2023-11-19 07:37:28,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891008243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:28,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:28,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:28,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63656] [2023-11-19 07:37:28,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:28,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:28,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:28,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:28,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:28,040 INFO L87 Difference]: Start difference. First operand 1239 states and 2114 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:28,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:28,178 INFO L93 Difference]: Finished difference Result 3291 states and 5632 transitions. [2023-11-19 07:37:28,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:28,180 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-19 07:37:28,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:28,200 INFO L225 Difference]: With dead ends: 3291 [2023-11-19 07:37:28,200 INFO L226 Difference]: Without dead ends: 2055 [2023-11-19 07:37:28,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:28,208 INFO L413 NwaCegarLoop]: 708 mSDtfsCounter, 381 mSDsluCounter, 620 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 1328 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:28,209 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [381 Valid, 1328 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:28,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2055 states. [2023-11-19 07:37:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2055 to 2049. [2023-11-19 07:37:28,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2049 states, 1460 states have (on average 1.6054794520547946) internal successors, (2344), 1466 states have internal predecessors, (2344), 580 states have call successors, (580), 8 states have call predecessors, (580), 8 states have return successors, (580), 574 states have call predecessors, (580), 580 states have call successors, (580) [2023-11-19 07:37:28,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2049 states to 2049 states and 3504 transitions. [2023-11-19 07:37:28,528 INFO L78 Accepts]: Start accepts. Automaton has 2049 states and 3504 transitions. Word has length 805 [2023-11-19 07:37:28,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:28,530 INFO L495 AbstractCegarLoop]: Abstraction has 2049 states and 3504 transitions. [2023-11-19 07:37:28,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:28,531 INFO L276 IsEmpty]: Start isEmpty. Operand 2049 states and 3504 transitions. [2023-11-19 07:37:28,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-19 07:37:28,542 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:28,543 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:28,578 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:28,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:28,761 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:28,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:28,762 INFO L85 PathProgramCache]: Analyzing trace with hash -49486533, now seen corresponding path program 1 times [2023-11-19 07:37:28,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:28,762 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408047435] [2023-11-19 07:37:28,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:28,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:28,912 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:28,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [842646300] [2023-11-19 07:37:28,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:28,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:28,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:28,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:28,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:37:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:29,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 1886 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:29,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:29,668 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-19 07:37:29,669 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:29,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:29,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408047435] [2023-11-19 07:37:29,669 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:29,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842646300] [2023-11-19 07:37:29,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842646300] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:29,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:29,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:29,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410924892] [2023-11-19 07:37:29,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:29,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:29,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:29,674 INFO L87 Difference]: Start difference. First operand 2049 states and 3504 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:29,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:29,955 INFO L93 Difference]: Finished difference Result 5595 states and 9524 transitions. [2023-11-19 07:37:29,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:29,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-19 07:37:29,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:29,989 INFO L225 Difference]: With dead ends: 5595 [2023-11-19 07:37:29,990 INFO L226 Difference]: Without dead ends: 3549 [2023-11-19 07:37:29,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:30,001 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 349 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:30,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1253 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:30,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3549 states. [2023-11-19 07:37:30,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3549 to 3545. [2023-11-19 07:37:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3545 states, 2452 states have (on average 1.567699836867863) internal successors, (3844), 2466 states have internal predecessors, (3844), 1076 states have call successors, (1076), 16 states have call predecessors, (1076), 16 states have return successors, (1076), 1062 states have call predecessors, (1076), 1076 states have call successors, (1076) [2023-11-19 07:37:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3545 states to 3545 states and 5996 transitions. [2023-11-19 07:37:30,705 INFO L78 Accepts]: Start accepts. Automaton has 3545 states and 5996 transitions. Word has length 805 [2023-11-19 07:37:30,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:30,707 INFO L495 AbstractCegarLoop]: Abstraction has 3545 states and 5996 transitions. [2023-11-19 07:37:30,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:30,708 INFO L276 IsEmpty]: Start isEmpty. Operand 3545 states and 5996 transitions. [2023-11-19 07:37:30,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-19 07:37:30,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:30,766 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:30,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:30,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:37:30,967 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:30,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:30,967 INFO L85 PathProgramCache]: Analyzing trace with hash 373215293, now seen corresponding path program 1 times [2023-11-19 07:37:30,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:30,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26886279] [2023-11-19 07:37:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:30,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:31,098 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:31,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111805770] [2023-11-19 07:37:31,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:31,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:31,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:31,101 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:31,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:37:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:31,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 1885 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:31,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-19 07:37:31,829 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:31,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:31,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26886279] [2023-11-19 07:37:31,830 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:31,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111805770] [2023-11-19 07:37:31,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111805770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:31,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:31,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:31,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630105092] [2023-11-19 07:37:31,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:31,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:31,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:31,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:31,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:31,835 INFO L87 Difference]: Start difference. First operand 3545 states and 5996 transitions. Second operand has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:32,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:32,300 INFO L93 Difference]: Finished difference Result 10621 states and 17966 transitions. [2023-11-19 07:37:32,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:32,301 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-19 07:37:32,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:32,367 INFO L225 Difference]: With dead ends: 10621 [2023-11-19 07:37:32,368 INFO L226 Difference]: Without dead ends: 7079 [2023-11-19 07:37:32,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 803 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:32,385 INFO L413 NwaCegarLoop]: 1203 mSDtfsCounter, 612 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 612 SdHoareTripleChecker+Valid, 1830 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:32,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [612 Valid, 1830 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:32,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7079 states. [2023-11-19 07:37:33,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7079 to 4489. [2023-11-19 07:37:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4489 states, 3396 states have (on average 1.6407538280329799) internal successors, (5572), 3410 states have internal predecessors, (5572), 1076 states have call successors, (1076), 16 states have call predecessors, (1076), 16 states have return successors, (1076), 1062 states have call predecessors, (1076), 1076 states have call successors, (1076) [2023-11-19 07:37:33,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4489 states to 4489 states and 7724 transitions. [2023-11-19 07:37:33,355 INFO L78 Accepts]: Start accepts. Automaton has 4489 states and 7724 transitions. Word has length 805 [2023-11-19 07:37:33,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:33,357 INFO L495 AbstractCegarLoop]: Abstraction has 4489 states and 7724 transitions. [2023-11-19 07:37:33,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 56.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:33,358 INFO L276 IsEmpty]: Start isEmpty. Operand 4489 states and 7724 transitions. [2023-11-19 07:37:33,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-19 07:37:33,425 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:33,426 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:33,451 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:33,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:33,636 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:33,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:33,637 INFO L85 PathProgramCache]: Analyzing trace with hash 1634132543, now seen corresponding path program 1 times [2023-11-19 07:37:33,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:33,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735642756] [2023-11-19 07:37:33,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:33,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:33,779 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:33,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128967607] [2023-11-19 07:37:33,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:33,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:33,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:33,781 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:33,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:37:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:34,471 INFO L262 TraceCheckSpWp]: Trace formula consists of 1884 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:37:34,510 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:37,259 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-19 07:37:37,261 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:37,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:37,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735642756] [2023-11-19 07:37:37,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:37,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128967607] [2023-11-19 07:37:37,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128967607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:37,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:37,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:37,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316906918] [2023-11-19 07:37:37,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:37,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 07:37:37,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:37,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 07:37:37,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:37:37,267 INFO L87 Difference]: Start difference. First operand 4489 states and 7724 transitions. Second operand has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:38,343 INFO L93 Difference]: Finished difference Result 14473 states and 24745 transitions. [2023-11-19 07:37:38,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:37:38,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-19 07:37:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:38,431 INFO L225 Difference]: With dead ends: 14473 [2023-11-19 07:37:38,431 INFO L226 Difference]: Without dead ends: 9987 [2023-11-19 07:37:38,449 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 804 GetRequests, 802 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-19 07:37:38,451 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 1157 mSDsluCounter, 993 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1157 SdHoareTripleChecker+Valid, 1683 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:38,451 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1157 Valid, 1683 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:37:38,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9987 states. [2023-11-19 07:37:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9987 to 8149. [2023-11-19 07:37:39,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8149 states, 5964 states have (on average 1.6089872568745809) internal successors, (9596), 5992 states have internal predecessors, (9596), 2152 states have call successors, (2152), 32 states have call predecessors, (2152), 32 states have return successors, (2152), 2124 states have call predecessors, (2152), 2152 states have call successors, (2152) [2023-11-19 07:37:39,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8149 states to 8149 states and 13900 transitions. [2023-11-19 07:37:39,931 INFO L78 Accepts]: Start accepts. Automaton has 8149 states and 13900 transitions. Word has length 805 [2023-11-19 07:37:39,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:39,933 INFO L495 AbstractCegarLoop]: Abstraction has 8149 states and 13900 transitions. [2023-11-19 07:37:39,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 42.0) internal successors, (168), 3 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:39,934 INFO L276 IsEmpty]: Start isEmpty. Operand 8149 states and 13900 transitions. [2023-11-19 07:37:39,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-19 07:37:39,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:39,963 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:39,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:40,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:40,176 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:40,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:40,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1674807293, now seen corresponding path program 1 times [2023-11-19 07:37:40,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:40,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556581322] [2023-11-19 07:37:40,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:40,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:40,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:40,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090585840] [2023-11-19 07:37:40,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:40,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:40,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:40,488 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:40,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:37:41,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:41,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 1883 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:37:41,159 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-19 07:37:50,223 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:50,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:50,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556581322] [2023-11-19 07:37:50,223 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:50,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090585840] [2023-11-19 07:37:50,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090585840] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:50,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:50,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 07:37:50,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887567113] [2023-11-19 07:37:50,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:50,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:37:50,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:50,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:37:50,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-19 07:37:50,228 INFO L87 Difference]: Start difference. First operand 8149 states and 13900 transitions. Second operand has 9 states, 9 states have (on average 18.666666666666668) internal successors, (168), 9 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:51,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:51,441 INFO L93 Difference]: Finished difference Result 19247 states and 32185 transitions. [2023-11-19 07:37:51,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:37:51,442 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.666666666666668) internal successors, (168), 9 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-19 07:37:51,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:51,488 INFO L225 Difference]: With dead ends: 19247 [2023-11-19 07:37:51,488 INFO L226 Difference]: Without dead ends: 11101 [2023-11-19 07:37:51,521 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 812 GetRequests, 797 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:37:51,524 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 228 mSDsluCounter, 3138 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 3782 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:51,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 3782 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:37:51,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11101 states. [2023-11-19 07:37:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11101 to 9845. [2023-11-19 07:37:52,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9845 states, 7372 states have (on average 1.5708084644601195) internal successors, (11580), 7432 states have internal predecessors, (11580), 2408 states have call successors, (2408), 64 states have call predecessors, (2408), 64 states have return successors, (2408), 2348 states have call predecessors, (2408), 2408 states have call successors, (2408) [2023-11-19 07:37:52,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9845 states to 9845 states and 16396 transitions. [2023-11-19 07:37:52,629 INFO L78 Accepts]: Start accepts. Automaton has 9845 states and 16396 transitions. Word has length 805 [2023-11-19 07:37:52,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:52,630 INFO L495 AbstractCegarLoop]: Abstraction has 9845 states and 16396 transitions. [2023-11-19 07:37:52,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.666666666666668) internal successors, (168), 9 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:52,631 INFO L276 IsEmpty]: Start isEmpty. Operand 9845 states and 16396 transitions. [2023-11-19 07:37:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 806 [2023-11-19 07:37:52,650 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:52,651 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:37:52,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:52,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:52,876 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:52,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:52,877 INFO L85 PathProgramCache]: Analyzing trace with hash 1281780283, now seen corresponding path program 1 times [2023-11-19 07:37:52,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:52,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24755262] [2023-11-19 07:37:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:52,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:52,984 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:52,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [132718906] [2023-11-19 07:37:52,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:52,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:52,985 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:52,986 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:52,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5518ccaf-17ba-481d-bcf1-dfc3d6895ad7/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:37:53,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:53,665 INFO L262 TraceCheckSpWp]: Trace formula consists of 1883 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 07:37:53,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:54,955 INFO L134 CoverageAnalysis]: Checked inductivity of 32512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2023-11-19 07:37:54,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:54,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:54,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24755262] [2023-11-19 07:37:54,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:54,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132718906] [2023-11-19 07:37:54,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132718906] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:54,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:54,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 07:37:54,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953504414] [2023-11-19 07:37:54,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:54,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:37:54,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:54,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:37:54,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:37:54,963 INFO L87 Difference]: Start difference. First operand 9845 states and 16396 transitions. Second operand has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) [2023-11-19 07:37:57,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:57,503 INFO L93 Difference]: Finished difference Result 38074 states and 63549 transitions. [2023-11-19 07:37:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:37:57,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 33.6) internal successors, (168), 4 states have internal predecessors, (168), 1 states have call successors, (128), 1 states have call predecessors, (128), 1 states have return successors, (128), 1 states have call predecessors, (128), 1 states have call successors, (128) Word has length 805 [2023-11-19 07:37:57,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:57,611 INFO L225 Difference]: With dead ends: 38074 [2023-11-19 07:37:57,611 INFO L226 Difference]: Without dead ends: 28232 [2023-11-19 07:37:57,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 807 GetRequests, 801 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:37:57,648 INFO L413 NwaCegarLoop]: 636 mSDtfsCounter, 1617 mSDsluCounter, 1879 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1617 SdHoareTripleChecker+Valid, 2515 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:57,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1617 Valid, 2515 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:37:57,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28232 states.