./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-44.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_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/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_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-44.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/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_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/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 609750d8c05e0e4e14e91494ff81b9d2562af2934da2373fc580feb4ae8b9db2 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:50:31,172 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:50:31,285 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:50:31,294 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:50:31,295 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:50:31,330 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:50:31,331 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:50:31,332 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:50:31,333 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:50:31,333 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:50:31,334 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:50:31,335 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:50:31,335 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:50:31,336 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:50:31,336 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:50:31,337 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:50:31,338 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:50:31,338 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:50:31,339 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:50:31,339 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:50:31,340 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:50:31,341 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:50:31,341 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:50:31,342 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:50:31,342 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:50:31,343 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:50:31,343 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:50:31,344 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:50:31,344 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:31,345 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:50:31,345 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:50:31,346 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:50:31,346 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:50:31,346 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:50:31,347 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:50:31,347 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:50:31,348 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:50:31,348 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:50:31,349 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:50:31,349 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_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 609750d8c05e0e4e14e91494ff81b9d2562af2934da2373fc580feb4ae8b9db2 [2023-11-19 07:50:31,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:50:31,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:50:31,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:50:31,617 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:50:31,618 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:50:31,619 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-44.i [2023-11-19 07:50:34,917 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:50:35,237 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:50:35,238 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-44.i [2023-11-19 07:50:35,257 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/data/a8a769c0e/9b7dd7aab5e148ca86fbe895efddc9f0/FLAG6fa525e96 [2023-11-19 07:50:35,276 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/data/a8a769c0e/9b7dd7aab5e148ca86fbe895efddc9f0 [2023-11-19 07:50:35,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:50:35,289 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:50:35,291 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:35,291 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:50:35,297 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:50:35,298 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:35" (1/1) ... [2023-11-19 07:50:35,299 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46121953 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35, skipping insertion in model container [2023-11-19 07:50:35,299 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:50:35" (1/1) ... [2023-11-19 07:50:35,367 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:50:35,579 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_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-44.i[916,929] [2023-11-19 07:50:35,765 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:35,782 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:50:35,794 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_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-100_file-44.i[916,929] [2023-11-19 07:50:35,842 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:50:35,863 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:50:35,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35 WrapperNode [2023-11-19 07:50:35,864 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:50:35,865 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:35,865 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:50:35,865 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:50:35,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35" (1/1) ... [2023-11-19 07:50:35,888 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35" (1/1) ... [2023-11-19 07:50:35,946 INFO L138 Inliner]: procedures = 26, calls = 84, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 421 [2023-11-19 07:50:35,946 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:50:35,947 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:50:35,947 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:50:35,947 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:50:35,957 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35" (1/1) ... [2023-11-19 07:50:35,957 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35" (1/1) ... [2023-11-19 07:50:35,963 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35" (1/1) ... [2023-11-19 07:50:35,963 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35" (1/1) ... [2023-11-19 07:50:35,983 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35" (1/1) ... [2023-11-19 07:50:35,996 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35" (1/1) ... [2023-11-19 07:50:36,000 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35" (1/1) ... [2023-11-19 07:50:36,004 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35" (1/1) ... [2023-11-19 07:50:36,012 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:50:36,013 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:50:36,013 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:50:36,013 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:50:36,014 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35" (1/1) ... [2023-11-19 07:50:36,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:50:36,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:36,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:50:36,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:50:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:50:36,117 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:50:36,118 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:50:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:50:36,118 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:50:36,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:50:36,314 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:50:36,317 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:50:37,118 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:50:37,130 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:50:37,130 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:50:37,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:37 BoogieIcfgContainer [2023-11-19 07:50:37,137 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:50:37,140 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:50:37,140 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:50:37,144 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:50:37,144 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:50:35" (1/3) ... [2023-11-19 07:50:37,145 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bed46f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:37, skipping insertion in model container [2023-11-19 07:50:37,146 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:50:35" (2/3) ... [2023-11-19 07:50:37,146 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bed46f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:50:37, skipping insertion in model container [2023-11-19 07:50:37,147 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:50:37" (3/3) ... [2023-11-19 07:50:37,148 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-100_file-44.i [2023-11-19 07:50:37,172 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:50:37,172 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:50:37,232 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:50:37,239 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;@77ef1bf6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:50:37,239 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:50:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 170 states, 96 states have (on average 1.3958333333333333) internal successors, (134), 97 states have internal predecessors, (134), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-19 07:50:37,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-19 07:50:37,301 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:37,304 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:37,304 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:37,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:37,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1827040095, now seen corresponding path program 1 times [2023-11-19 07:50:37,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:37,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915222900] [2023-11-19 07:50:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:37,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:37,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:37,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915222900] [2023-11-19 07:50:37,874 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:50:37,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893042447] [2023-11-19 07:50:37,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:37,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:37,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:37,881 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:37,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:50:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:38,337 INFO L262 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:50:38,362 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 140 proven. 0 refuted. 0 times theorem prover too weak. 9800 trivial. 0 not checked. [2023-11-19 07:50:38,459 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:50:38,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893042447] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:50:38,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:50:38,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:50:38,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925964695] [2023-11-19 07:50:38,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:50:38,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:50:38,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:38,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:50:38,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:50:38,511 INFO L87 Difference]: Start difference. First operand has 170 states, 96 states have (on average 1.3958333333333333) internal successors, (134), 97 states have internal predecessors, (134), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) Second operand has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-19 07:50:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:38,574 INFO L93 Difference]: Finished difference Result 333 states and 617 transitions. [2023-11-19 07:50:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:50:38,577 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 2 states have call successors, (71) Word has length 432 [2023-11-19 07:50:38,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:38,589 INFO L225 Difference]: With dead ends: 333 [2023-11-19 07:50:38,589 INFO L226 Difference]: Without dead ends: 166 [2023-11-19 07:50:38,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 431 GetRequests, 431 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 07:50:38,600 INFO L413 NwaCegarLoop]: 269 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, 269 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 07:50:38,601 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:50:38,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-19 07:50:38,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2023-11-19 07:50:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 93 states have (on average 1.3655913978494623) internal successors, (127), 93 states have internal predecessors, (127), 71 states have call successors, (71), 1 states have call predecessors, (71), 1 states have return successors, (71), 71 states have call predecessors, (71), 71 states have call successors, (71) [2023-11-19 07:50:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 269 transitions. [2023-11-19 07:50:38,682 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 269 transitions. Word has length 432 [2023-11-19 07:50:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:38,683 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 269 transitions. [2023-11-19 07:50:38,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 41.0) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (71), 2 states have call predecessors, (71), 1 states have return successors, (71), 1 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-19 07:50:38,684 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 269 transitions. [2023-11-19 07:50:38,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-19 07:50:38,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:38,696 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:38,722 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:50:38,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:50:38,921 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:38,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:38,922 INFO L85 PathProgramCache]: Analyzing trace with hash 2011017351, now seen corresponding path program 1 times [2023-11-19 07:50:38,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:38,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797892679] [2023-11-19 07:50:38,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:38,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:39,124 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:39,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [86780742] [2023-11-19 07:50:39,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:39,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:39,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:39,127 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:39,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:50:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:39,593 INFO L262 TraceCheckSpWp]: Trace formula consists of 1008 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 07:50:39,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:40,975 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5135 proven. 177 refuted. 0 times theorem prover too weak. 4628 trivial. 0 not checked. [2023-11-19 07:50:40,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:41,730 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 237 proven. 180 refuted. 0 times theorem prover too weak. 9523 trivial. 0 not checked. [2023-11-19 07:50:41,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:41,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797892679] [2023-11-19 07:50:41,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:41,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86780742] [2023-11-19 07:50:41,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86780742] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:41,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:41,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2023-11-19 07:50:41,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169990848] [2023-11-19 07:50:41,733 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:41,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:50:41,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:41,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:50:41,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:50:41,738 INFO L87 Difference]: Start difference. First operand 166 states and 269 transitions. Second operand has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 3 states have call successors, (102), 3 states have call predecessors, (102), 7 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) [2023-11-19 07:50:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:43,922 INFO L93 Difference]: Finished difference Result 753 states and 1203 transitions. [2023-11-19 07:50:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-19 07:50:43,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 3 states have call successors, (102), 3 states have call predecessors, (102), 7 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) Word has length 432 [2023-11-19 07:50:43,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:43,941 INFO L225 Difference]: With dead ends: 753 [2023-11-19 07:50:43,941 INFO L226 Difference]: Without dead ends: 590 [2023-11-19 07:50:43,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 889 GetRequests, 850 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=443, Invalid=963, Unknown=0, NotChecked=0, Total=1406 [2023-11-19 07:50:43,946 INFO L413 NwaCegarLoop]: 246 mSDtfsCounter, 972 mSDsluCounter, 618 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 608 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 864 SdHoareTripleChecker+Invalid, 1440 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 608 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:43,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 864 Invalid, 1440 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [608 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 07:50:43,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2023-11-19 07:50:44,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 284. [2023-11-19 07:50:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 172 states have (on average 1.4011627906976745) internal successors, (241), 173 states have internal predecessors, (241), 107 states have call successors, (107), 4 states have call predecessors, (107), 4 states have return successors, (107), 106 states have call predecessors, (107), 107 states have call successors, (107) [2023-11-19 07:50:44,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 455 transitions. [2023-11-19 07:50:44,094 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 455 transitions. Word has length 432 [2023-11-19 07:50:44,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:44,097 INFO L495 AbstractCegarLoop]: Abstraction has 284 states and 455 transitions. [2023-11-19 07:50:44,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 6.666666666666667) internal successors, (100), 15 states have internal predecessors, (100), 3 states have call successors, (102), 3 states have call predecessors, (102), 7 states have return successors, (103), 3 states have call predecessors, (103), 3 states have call successors, (103) [2023-11-19 07:50:44,100 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 455 transitions. [2023-11-19 07:50:44,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-19 07:50:44,111 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:44,112 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:44,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:44,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-19 07:50:44,326 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:44,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:44,327 INFO L85 PathProgramCache]: Analyzing trace with hash -478511611, now seen corresponding path program 1 times [2023-11-19 07:50:44,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:44,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645988329] [2023-11-19 07:50:44,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:44,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:44,465 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:44,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [783243171] [2023-11-19 07:50:44,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:44,466 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:44,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:44,475 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:44,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:50:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:44,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 1009 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:50:44,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5028 proven. 99 refuted. 0 times theorem prover too weak. 4813 trivial. 0 not checked. [2023-11-19 07:50:45,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:50:45,708 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 111 proven. 99 refuted. 0 times theorem prover too weak. 9730 trivial. 0 not checked. [2023-11-19 07:50:45,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:50:45,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645988329] [2023-11-19 07:50:45,710 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:50:45,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783243171] [2023-11-19 07:50:45,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783243171] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:50:45,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:50:45,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:50:45,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819513212] [2023-11-19 07:50:45,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:50:45,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:50:45,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:50:45,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:50:45,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:50:45,720 INFO L87 Difference]: Start difference. First operand 284 states and 455 transitions. Second operand has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 2 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) [2023-11-19 07:50:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:50:46,202 INFO L93 Difference]: Finished difference Result 571 states and 906 transitions. [2023-11-19 07:50:46,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-19 07:50:46,203 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 2 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) Word has length 432 [2023-11-19 07:50:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:50:46,208 INFO L225 Difference]: With dead ends: 571 [2023-11-19 07:50:46,208 INFO L226 Difference]: Without dead ends: 286 [2023-11-19 07:50:46,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 856 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:50:46,213 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 136 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 425 SdHoareTripleChecker+Invalid, 386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:50:46,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 425 Invalid, 386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:50:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2023-11-19 07:50:46,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 276. [2023-11-19 07:50:46,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 163 states have (on average 1.3496932515337423) internal successors, (220), 164 states have internal predecessors, (220), 107 states have call successors, (107), 5 states have call predecessors, (107), 5 states have return successors, (107), 106 states have call predecessors, (107), 107 states have call successors, (107) [2023-11-19 07:50:46,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 434 transitions. [2023-11-19 07:50:46,307 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 434 transitions. Word has length 432 [2023-11-19 07:50:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:50:46,315 INFO L495 AbstractCegarLoop]: Abstraction has 276 states and 434 transitions. [2023-11-19 07:50:46,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.714285714285714) internal successors, (89), 7 states have internal predecessors, (89), 2 states have call successors, (104), 2 states have call predecessors, (104), 4 states have return successors, (105), 2 states have call predecessors, (105), 2 states have call successors, (105) [2023-11-19 07:50:46,315 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 434 transitions. [2023-11-19 07:50:46,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 433 [2023-11-19 07:50:46,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:50:46,327 INFO L195 NwaCegarLoop]: trace histogram [71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:50:46,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:50:46,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:46,550 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:50:46,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:50:46,550 INFO L85 PathProgramCache]: Analyzing trace with hash 2073056965, now seen corresponding path program 1 times [2023-11-19 07:50:46,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:50:46,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122471313] [2023-11-19 07:50:46,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:46,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:50:46,649 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:50:46,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2143291114] [2023-11-19 07:50:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:50:46,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:50:46,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:50:46,652 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:50:46,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ad8b76f-79ff-4594-bfe6-7d22b08d4cc8/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:50:47,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:50:47,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 1005 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-19 07:50:47,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:50:49,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 5046 proven. 87 refuted. 0 times theorem prover too weak. 4807 trivial. 0 not checked. [2023-11-19 07:50:49,613 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:51:22,861 INFO L134 CoverageAnalysis]: Checked inductivity of 9940 backedges. 327 proven. 90 refuted. 0 times theorem prover too weak. 9523 trivial. 0 not checked. [2023-11-19 07:51:22,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:51:22,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122471313] [2023-11-19 07:51:22,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:51:22,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143291114] [2023-11-19 07:51:22,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143291114] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:51:22,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:51:22,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-11-19 07:51:22,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286382328] [2023-11-19 07:51:22,865 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:51:22,868 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-19 07:51:22,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:51:22,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-19 07:51:22,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2023-11-19 07:51:22,871 INFO L87 Difference]: Start difference. First operand 276 states and 434 transitions. Second operand has 22 states, 22 states have (on average 5.818181818181818) internal successors, (128), 22 states have internal predecessors, (128), 5 states have call successors, (95), 3 states have call predecessors, (95), 7 states have return successors, (96), 5 states have call predecessors, (96), 5 states have call successors, (96)