./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-56.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/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_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-56.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/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_498b2e94-12af-4dbe-a8e2-99b2e34fc200/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 0099f1ae0b0455065bfe0355de19f44eec2ea7eff30cffa8e7ce9d1f799b3467 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:37:02,167 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:37:02,296 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:37:02,300 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:37:02,301 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:37:02,325 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:37:02,328 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:37:02,328 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:37:02,329 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:37:02,334 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:37:02,335 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:37:02,336 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:37:02,336 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:37:02,338 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:37:02,339 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:37:02,339 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:37:02,340 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:37:02,340 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:37:02,341 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:37:02,341 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:37:02,341 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:37:02,342 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:37:02,342 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:37:02,343 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:37:02,343 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:37:02,344 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:37:02,344 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:37:02,344 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:37:02,345 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:02,345 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:37:02,346 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:37:02,346 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:37:02,346 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:37:02,347 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:37:02,347 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:37:02,347 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:37:02,347 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:37:02,347 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:37:02,348 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:37:02,348 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_498b2e94-12af-4dbe-a8e2-99b2e34fc200/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0099f1ae0b0455065bfe0355de19f44eec2ea7eff30cffa8e7ce9d1f799b3467 [2023-11-19 07:37:02,710 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:37:02,743 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:37:02,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:37:02,749 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:37:02,749 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:37:02,751 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-56.i [2023-11-19 07:37:05,902 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:37:06,297 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:37:06,300 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-56.i [2023-11-19 07:37:06,314 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/data/02d17f2c2/3468bc16459246e1aaa5c0cff261031b/FLAG97523982a [2023-11-19 07:37:06,331 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/data/02d17f2c2/3468bc16459246e1aaa5c0cff261031b [2023-11-19 07:37:06,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:37:06,340 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:37:06,343 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:06,343 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:37:06,349 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:37:06,351 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:06" (1/1) ... [2023-11-19 07:37:06,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4181e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06, skipping insertion in model container [2023-11-19 07:37:06,353 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:37:06" (1/1) ... [2023-11-19 07:37:06,419 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:37:06,613 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_498b2e94-12af-4dbe-a8e2-99b2e34fc200/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-56.i[916,929] [2023-11-19 07:37:06,827 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:06,855 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:37:06,869 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_498b2e94-12af-4dbe-a8e2-99b2e34fc200/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-56.i[916,929] [2023-11-19 07:37:06,938 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:37:06,963 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:37:06,963 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06 WrapperNode [2023-11-19 07:37:06,964 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:37:06,965 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:06,965 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:37:06,965 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:37:06,974 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06" (1/1) ... [2023-11-19 07:37:07,005 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06" (1/1) ... [2023-11-19 07:37:07,069 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 534 [2023-11-19 07:37:07,069 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:37:07,070 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:37:07,070 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:37:07,071 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:37:07,081 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06" (1/1) ... [2023-11-19 07:37:07,081 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06" (1/1) ... [2023-11-19 07:37:07,106 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06" (1/1) ... [2023-11-19 07:37:07,110 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06" (1/1) ... [2023-11-19 07:37:07,163 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06" (1/1) ... [2023-11-19 07:37:07,169 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06" (1/1) ... [2023-11-19 07:37:07,181 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06" (1/1) ... [2023-11-19 07:37:07,203 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06" (1/1) ... [2023-11-19 07:37:07,213 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:37:07,222 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:37:07,222 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:37:07,223 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:37:07,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06" (1/1) ... [2023-11-19 07:37:07,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:37:07,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:07,259 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:37:07,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:37:07,306 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:37:07,306 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:37:07,307 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:37:07,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:37:07,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:37:07,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:37:07,473 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:37:07,475 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:37:08,360 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:37:08,372 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:37:08,372 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:37:08,378 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:08 BoogieIcfgContainer [2023-11-19 07:37:08,379 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:37:08,381 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:37:08,381 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:37:08,384 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:37:08,385 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:37:06" (1/3) ... [2023-11-19 07:37:08,386 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399499fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:08, skipping insertion in model container [2023-11-19 07:37:08,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:37:06" (2/3) ... [2023-11-19 07:37:08,386 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@399499fd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:37:08, skipping insertion in model container [2023-11-19 07:37:08,386 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:37:08" (3/3) ... [2023-11-19 07:37:08,388 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-56.i [2023-11-19 07:37:08,408 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:37:08,408 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:37:08,466 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:37:08,473 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;@3eb380c3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:37:08,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:37:08,480 INFO L276 IsEmpty]: Start isEmpty. Operand has 215 states, 132 states have (on average 1.5151515151515151) internal successors, (200), 133 states have internal predecessors, (200), 80 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-19 07:37:08,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2023-11-19 07:37:08,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:08,517 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:08,519 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:08,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:08,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1184358213, now seen corresponding path program 1 times [2023-11-19 07:37:08,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:08,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495335095] [2023-11-19 07:37:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:08,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:08,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:09,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:09,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495335095] [2023-11-19 07:37:09,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:37:09,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799369900] [2023-11-19 07:37:09,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:09,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:09,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:09,061 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:09,071 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:37:09,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:09,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:37:09,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:09,701 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 12482 trivial. 0 not checked. [2023-11-19 07:37:09,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:09,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799369900] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:09,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:09,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:37:09,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053685337] [2023-11-19 07:37:09,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:09,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:37:09,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:09,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:37:09,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:37:09,763 INFO L87 Difference]: Start difference. First operand has 215 states, 132 states have (on average 1.5151515151515151) internal successors, (200), 133 states have internal predecessors, (200), 80 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) Second operand has 2 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (80), 2 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-19 07:37:09,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:09,840 INFO L93 Difference]: Finished difference Result 423 states and 794 transitions. [2023-11-19 07:37:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:37:09,843 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (80), 2 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 2 states have call successors, (80) Word has length 498 [2023-11-19 07:37:09,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:09,855 INFO L225 Difference]: With dead ends: 423 [2023-11-19 07:37:09,855 INFO L226 Difference]: Without dead ends: 211 [2023-11-19 07:37:09,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 497 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 07:37:09,867 INFO L413 NwaCegarLoop]: 353 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, 353 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 07:37:09,868 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:09,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-19 07:37:09,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2023-11-19 07:37:09,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 129 states have (on average 1.496124031007752) internal successors, (193), 129 states have internal predecessors, (193), 80 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-19 07:37:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 353 transitions. [2023-11-19 07:37:09,963 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 353 transitions. Word has length 498 [2023-11-19 07:37:09,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:09,964 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 353 transitions. [2023-11-19 07:37:09,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 51.5) internal successors, (103), 2 states have internal predecessors, (103), 2 states have call successors, (80), 2 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-19 07:37:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 353 transitions. [2023-11-19 07:37:09,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2023-11-19 07:37:09,981 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:09,982 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:10,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:10,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:10,202 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:10,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:10,203 INFO L85 PathProgramCache]: Analyzing trace with hash -581187491, now seen corresponding path program 1 times [2023-11-19 07:37:10,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:10,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082710091] [2023-11-19 07:37:10,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:10,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:10,408 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:10,408 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [216157876] [2023-11-19 07:37:10,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:10,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:10,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:10,410 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:10,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:37:10,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:10,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:10,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:10,999 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-19 07:37:10,999 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:11,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:11,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082710091] [2023-11-19 07:37:11,003 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:11,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216157876] [2023-11-19 07:37:11,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216157876] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:11,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:11,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:11,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73002212] [2023-11-19 07:37:11,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:11,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:11,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:11,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:11,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:11,012 INFO L87 Difference]: Start difference. First operand 211 states and 353 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-19 07:37:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:11,166 INFO L93 Difference]: Finished difference Result 541 states and 908 transitions. [2023-11-19 07:37:11,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:11,168 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 498 [2023-11-19 07:37:11,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:11,181 INFO L225 Difference]: With dead ends: 541 [2023-11-19 07:37:11,182 INFO L226 Difference]: Without dead ends: 333 [2023-11-19 07:37:11,184 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 496 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 07:37:11,185 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 193 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 800 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:11,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 800 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:37:11,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2023-11-19 07:37:11,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 330. [2023-11-19 07:37:11,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 209 states have (on average 1.4976076555023923) internal successors, (313), 210 states have internal predecessors, (313), 118 states have call successors, (118), 2 states have call predecessors, (118), 2 states have return successors, (118), 117 states have call predecessors, (118), 118 states have call successors, (118) [2023-11-19 07:37:11,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 549 transitions. [2023-11-19 07:37:11,284 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 549 transitions. Word has length 498 [2023-11-19 07:37:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:11,290 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 549 transitions. [2023-11-19 07:37:11,290 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-19 07:37:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 549 transitions. [2023-11-19 07:37:11,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-19 07:37:11,299 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:11,299 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:11,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:11,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:11,514 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:11,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:11,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1849821658, now seen corresponding path program 1 times [2023-11-19 07:37:11,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:11,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587400042] [2023-11-19 07:37:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:11,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:11,710 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:11,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [744711676] [2023-11-19 07:37:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:11,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:11,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:11,718 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:11,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:37:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:12,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 07:37:12,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:12,169 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-19 07:37:12,175 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:12,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:12,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587400042] [2023-11-19 07:37:12,176 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:12,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744711676] [2023-11-19 07:37:12,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744711676] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:12,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:12,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:37:12,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052418618] [2023-11-19 07:37:12,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:12,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:37:12,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:12,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:37:12,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:37:12,181 INFO L87 Difference]: Start difference. First operand 330 states and 549 transitions. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-19 07:37:12,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:12,272 INFO L93 Difference]: Finished difference Result 664 states and 1100 transitions. [2023-11-19 07:37:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:37:12,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 499 [2023-11-19 07:37:12,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:12,279 INFO L225 Difference]: With dead ends: 664 [2023-11-19 07:37:12,279 INFO L226 Difference]: Without dead ends: 337 [2023-11-19 07:37:12,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 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 07:37:12,282 INFO L413 NwaCegarLoop]: 408 mSDtfsCounter, 200 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 720 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:12,283 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 720 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:37:12,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2023-11-19 07:37:12,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 255. [2023-11-19 07:37:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 172 states have (on average 1.5174418604651163) internal successors, (261), 172 states have internal predecessors, (261), 80 states have call successors, (80), 2 states have call predecessors, (80), 2 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-19 07:37:12,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 421 transitions. [2023-11-19 07:37:12,314 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 421 transitions. Word has length 499 [2023-11-19 07:37:12,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:12,316 INFO L495 AbstractCegarLoop]: Abstraction has 255 states and 421 transitions. [2023-11-19 07:37:12,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-19 07:37:12,317 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 421 transitions. [2023-11-19 07:37:12,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-19 07:37:12,322 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:12,323 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:12,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:12,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:12,541 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:12,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:12,542 INFO L85 PathProgramCache]: Analyzing trace with hash -351031256, now seen corresponding path program 1 times [2023-11-19 07:37:12,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:12,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092967499] [2023-11-19 07:37:12,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:12,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:12,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:12,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1199385844] [2023-11-19 07:37:12,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:12,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:12,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:12,659 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:12,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:37:13,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:13,057 INFO L262 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:37:13,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 6127 proven. 93 refuted. 0 times theorem prover too weak. 6420 trivial. 0 not checked. [2023-11-19 07:37:13,450 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:13,983 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 144 proven. 93 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-19 07:37:13,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:13,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092967499] [2023-11-19 07:37:13,983 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:13,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199385844] [2023-11-19 07:37:13,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199385844] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:13,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:37:13,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-19 07:37:13,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831744237] [2023-11-19 07:37:13,985 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:13,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:37:13,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:13,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:37:13,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:37:13,989 INFO L87 Difference]: Start difference. First operand 255 states and 421 transitions. Second operand has 12 states, 12 states have (on average 12.166666666666666) internal successors, (146), 12 states have internal predecessors, (146), 3 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 3 states have call predecessors, (112), 3 states have call successors, (112) [2023-11-19 07:37:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:15,554 INFO L93 Difference]: Finished difference Result 825 states and 1368 transitions. [2023-11-19 07:37:15,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:37:15,556 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 12.166666666666666) internal successors, (146), 12 states have internal predecessors, (146), 3 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 3 states have call predecessors, (112), 3 states have call successors, (112) Word has length 499 [2023-11-19 07:37:15,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:15,562 INFO L225 Difference]: With dead ends: 825 [2023-11-19 07:37:15,562 INFO L226 Difference]: Without dead ends: 573 [2023-11-19 07:37:15,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 987 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:37:15,569 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 649 mSDsluCounter, 1219 mSDsCounter, 0 mSdLazyCounter, 1438 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1520 SdHoareTripleChecker+Invalid, 1555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:15,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 1520 Invalid, 1555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1438 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 07:37:15,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2023-11-19 07:37:15,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 412. [2023-11-19 07:37:15,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 303 states have (on average 1.5742574257425743) internal successors, (477), 304 states have internal predecessors, (477), 104 states have call successors, (104), 4 states have call predecessors, (104), 4 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-19 07:37:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 685 transitions. [2023-11-19 07:37:15,636 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 685 transitions. Word has length 499 [2023-11-19 07:37:15,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:15,640 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 685 transitions. [2023-11-19 07:37:15,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.166666666666666) internal successors, (146), 12 states have internal predecessors, (146), 3 states have call successors, (111), 2 states have call predecessors, (111), 4 states have return successors, (112), 3 states have call predecessors, (112), 3 states have call successors, (112) [2023-11-19 07:37:15,641 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 685 transitions. [2023-11-19 07:37:15,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-19 07:37:15,681 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:15,682 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:15,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:15,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:15,897 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:15,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:15,898 INFO L85 PathProgramCache]: Analyzing trace with hash -745398042, now seen corresponding path program 1 times [2023-11-19 07:37:15,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:15,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830710967] [2023-11-19 07:37:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:15,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:15,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:15,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [178815170] [2023-11-19 07:37:15,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:15,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:15,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:15,996 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:16,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:37:16,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:16,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 1162 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 07:37:16,432 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:17,220 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 6388 proven. 174 refuted. 0 times theorem prover too weak. 6078 trivial. 0 not checked. [2023-11-19 07:37:17,220 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:17,712 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 294 proven. 177 refuted. 0 times theorem prover too weak. 12169 trivial. 0 not checked. [2023-11-19 07:37:17,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:17,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830710967] [2023-11-19 07:37:17,718 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:17,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178815170] [2023-11-19 07:37:17,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178815170] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:17,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:37:17,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-19 07:37:17,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630540110] [2023-11-19 07:37:17,719 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:17,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:37:17,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:17,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:37:17,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:37:17,726 INFO L87 Difference]: Start difference. First operand 412 states and 685 transitions. Second operand has 16 states, 16 states have (on average 9.6875) internal successors, (155), 16 states have internal predecessors, (155), 5 states have call successors, (111), 3 states have call predecessors, (111), 7 states have return successors, (112), 5 states have call predecessors, (112), 5 states have call successors, (112) [2023-11-19 07:37:18,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:18,777 INFO L93 Difference]: Finished difference Result 829 states and 1372 transitions. [2023-11-19 07:37:18,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:37:18,779 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.6875) internal successors, (155), 16 states have internal predecessors, (155), 5 states have call successors, (111), 3 states have call predecessors, (111), 7 states have return successors, (112), 5 states have call predecessors, (112), 5 states have call successors, (112) Word has length 499 [2023-11-19 07:37:18,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:18,784 INFO L225 Difference]: With dead ends: 829 [2023-11-19 07:37:18,785 INFO L226 Difference]: Without dead ends: 420 [2023-11-19 07:37:18,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1006 GetRequests, 983 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2023-11-19 07:37:18,787 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 515 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 1116 SdHoareTripleChecker+Invalid, 1191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:18,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [564 Valid, 1116 Invalid, 1191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:37:18,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2023-11-19 07:37:18,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 410. [2023-11-19 07:37:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 300 states have (on average 1.56) internal successors, (468), 301 states have internal predecessors, (468), 104 states have call successors, (104), 5 states have call predecessors, (104), 5 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-19 07:37:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 676 transitions. [2023-11-19 07:37:18,831 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 676 transitions. Word has length 499 [2023-11-19 07:37:18,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:18,832 INFO L495 AbstractCegarLoop]: Abstraction has 410 states and 676 transitions. [2023-11-19 07:37:18,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.6875) internal successors, (155), 16 states have internal predecessors, (155), 5 states have call successors, (111), 3 states have call predecessors, (111), 7 states have return successors, (112), 5 states have call predecessors, (112), 5 states have call successors, (112) [2023-11-19 07:37:18,833 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 676 transitions. [2023-11-19 07:37:18,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2023-11-19 07:37:18,838 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:18,838 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:18,862 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:19,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:19,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:19,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:19,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1961159406, now seen corresponding path program 1 times [2023-11-19 07:37:19,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:19,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150399649] [2023-11-19 07:37:19,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:19,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:19,134 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:19,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770767323] [2023-11-19 07:37:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:19,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:19,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:19,136 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:19,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:37:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:19,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:37:19,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:20,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 1287 proven. 225 refuted. 0 times theorem prover too weak. 11128 trivial. 0 not checked. [2023-11-19 07:37:20,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:20,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 12 proven. 225 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-19 07:37:20,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:20,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150399649] [2023-11-19 07:37:20,908 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:20,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770767323] [2023-11-19 07:37:20,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770767323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:20,909 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:37:20,909 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-19 07:37:20,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645172958] [2023-11-19 07:37:20,910 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:20,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-19 07:37:20,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:20,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-19 07:37:20,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 07:37:20,913 INFO L87 Difference]: Start difference. First operand 410 states and 676 transitions. Second operand has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 2 states have call successors, (155), 2 states have call predecessors, (155), 4 states have return successors, (156), 2 states have call predecessors, (156), 2 states have call successors, (156) [2023-11-19 07:37:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:21,458 INFO L93 Difference]: Finished difference Result 831 states and 1361 transitions. [2023-11-19 07:37:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:37:21,460 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 2 states have call successors, (155), 2 states have call predecessors, (155), 4 states have return successors, (156), 2 states have call predecessors, (156), 2 states have call successors, (156) Word has length 500 [2023-11-19 07:37:21,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:21,464 INFO L225 Difference]: With dead ends: 831 [2023-11-19 07:37:21,465 INFO L226 Difference]: Without dead ends: 424 [2023-11-19 07:37:21,466 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1002 GetRequests, 992 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 07:37:21,467 INFO L413 NwaCegarLoop]: 264 mSDtfsCounter, 208 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 630 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:21,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 630 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-19 07:37:21,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2023-11-19 07:37:21,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 418. [2023-11-19 07:37:21,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 306 states have (on average 1.542483660130719) internal successors, (472), 307 states have internal predecessors, (472), 104 states have call successors, (104), 7 states have call predecessors, (104), 7 states have return successors, (104), 103 states have call predecessors, (104), 104 states have call successors, (104) [2023-11-19 07:37:21,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 680 transitions. [2023-11-19 07:37:21,514 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 680 transitions. Word has length 500 [2023-11-19 07:37:21,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:21,515 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 680 transitions. [2023-11-19 07:37:21,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.0) internal successors, (112), 7 states have internal predecessors, (112), 2 states have call successors, (155), 2 states have call predecessors, (155), 4 states have return successors, (156), 2 states have call predecessors, (156), 2 states have call successors, (156) [2023-11-19 07:37:21,516 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 680 transitions. [2023-11-19 07:37:21,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2023-11-19 07:37:21,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:21,521 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:21,550 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:21,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:21,745 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:21,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:21,745 INFO L85 PathProgramCache]: Analyzing trace with hash -1524461264, now seen corresponding path program 1 times [2023-11-19 07:37:21,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:21,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973083293] [2023-11-19 07:37:21,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:21,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:21,866 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:21,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208328308] [2023-11-19 07:37:21,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:21,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:21,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:21,874 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:21,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:37:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:22,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:37:22,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 1843 proven. 219 refuted. 0 times theorem prover too weak. 10578 trivial. 0 not checked. [2023-11-19 07:37:23,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:23,724 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 18 proven. 219 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-19 07:37:23,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:23,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973083293] [2023-11-19 07:37:23,725 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:23,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208328308] [2023-11-19 07:37:23,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208328308] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:37:23,726 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 07:37:23,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2023-11-19 07:37:23,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041233606] [2023-11-19 07:37:23,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 07:37:23,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:37:23,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:23,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:37:23,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:37:23,730 INFO L87 Difference]: Start difference. First operand 418 states and 680 transitions. Second operand has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 2 states have call successors, (153), 2 states have call predecessors, (153), 4 states have return successors, (154), 2 states have call predecessors, (154), 2 states have call successors, (154) [2023-11-19 07:37:24,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:24,705 INFO L93 Difference]: Finished difference Result 961 states and 1517 transitions. [2023-11-19 07:37:24,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:37:24,706 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 2 states have call successors, (153), 2 states have call predecessors, (153), 4 states have return successors, (154), 2 states have call predecessors, (154), 2 states have call successors, (154) Word has length 500 [2023-11-19 07:37:24,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:24,712 INFO L225 Difference]: With dead ends: 961 [2023-11-19 07:37:24,712 INFO L226 Difference]: Without dead ends: 540 [2023-11-19 07:37:24,714 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1013 GetRequests, 991 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=352, Unknown=0, NotChecked=0, Total=506 [2023-11-19 07:37:24,716 INFO L413 NwaCegarLoop]: 262 mSDtfsCounter, 475 mSDsluCounter, 1143 mSDsCounter, 0 mSdLazyCounter, 694 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1405 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 694 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:24,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1405 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 694 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:37:24,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2023-11-19 07:37:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 474. [2023-11-19 07:37:24,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 350 states have (on average 1.502857142857143) internal successors, (526), 353 states have internal predecessors, (526), 112 states have call successors, (112), 11 states have call predecessors, (112), 11 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-19 07:37:24,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 750 transitions. [2023-11-19 07:37:24,775 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 750 transitions. Word has length 500 [2023-11-19 07:37:24,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:24,776 INFO L495 AbstractCegarLoop]: Abstraction has 474 states and 750 transitions. [2023-11-19 07:37:24,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 2 states have call successors, (153), 2 states have call predecessors, (153), 4 states have return successors, (154), 2 states have call predecessors, (154), 2 states have call successors, (154) [2023-11-19 07:37:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 750 transitions. [2023-11-19 07:37:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2023-11-19 07:37:24,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:24,782 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:24,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:25,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:25,006 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:25,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:25,007 INFO L85 PathProgramCache]: Analyzing trace with hash -823396686, now seen corresponding path program 1 times [2023-11-19 07:37:25,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:25,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916314128] [2023-11-19 07:37:25,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:25,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:25,111 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:25,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [12379417] [2023-11-19 07:37:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:25,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:25,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:25,114 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:25,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:37:25,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:25,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 1163 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:37:25,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:26,153 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 5616 proven. 0 refuted. 0 times theorem prover too weak. 7024 trivial. 0 not checked. [2023-11-19 07:37:26,153 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:37:26,153 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:26,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916314128] [2023-11-19 07:37:26,154 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:26,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12379417] [2023-11-19 07:37:26,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12379417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:37:26,154 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:37:26,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-19 07:37:26,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671982111] [2023-11-19 07:37:26,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:26,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:37:26,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:26,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:37:26,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:37:26,158 INFO L87 Difference]: Start difference. First operand 474 states and 750 transitions. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 2 states have call successors, (80), 2 states have call predecessors, (80), 2 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-19 07:37:27,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:27,218 INFO L93 Difference]: Finished difference Result 1980 states and 3133 transitions. [2023-11-19 07:37:27,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:37:27,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 2 states have call successors, (80), 2 states have call predecessors, (80), 2 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) Word has length 500 [2023-11-19 07:37:27,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:27,235 INFO L225 Difference]: With dead ends: 1980 [2023-11-19 07:37:27,235 INFO L226 Difference]: Without dead ends: 1509 [2023-11-19 07:37:27,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 497 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:37:27,239 INFO L413 NwaCegarLoop]: 383 mSDtfsCounter, 938 mSDsluCounter, 832 mSDsCounter, 0 mSdLazyCounter, 633 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 938 SdHoareTripleChecker+Valid, 1215 SdHoareTripleChecker+Invalid, 781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:27,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [938 Valid, 1215 Invalid, 781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 633 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-19 07:37:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1509 states. [2023-11-19 07:37:27,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1509 to 482. [2023-11-19 07:37:27,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 358 states have (on average 1.5083798882681565) internal successors, (540), 361 states have internal predecessors, (540), 112 states have call successors, (112), 11 states have call predecessors, (112), 11 states have return successors, (112), 109 states have call predecessors, (112), 112 states have call successors, (112) [2023-11-19 07:37:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 764 transitions. [2023-11-19 07:37:27,341 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 764 transitions. Word has length 500 [2023-11-19 07:37:27,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:27,342 INFO L495 AbstractCegarLoop]: Abstraction has 482 states and 764 transitions. [2023-11-19 07:37:27,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 2 states have call successors, (80), 2 states have call predecessors, (80), 2 states have return successors, (80), 2 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-19 07:37:27,343 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 764 transitions. [2023-11-19 07:37:27,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2023-11-19 07:37:27,348 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:27,348 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:27,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:27,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:27,570 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:27,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:27,570 INFO L85 PathProgramCache]: Analyzing trace with hash -1716883024, now seen corresponding path program 1 times [2023-11-19 07:37:27,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:27,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678303808] [2023-11-19 07:37:27,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:27,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:27,654 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:27,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292113679] [2023-11-19 07:37:27,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:27,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:27,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:27,656 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:27,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:37:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:28,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-19 07:37:28,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:37:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 8441 proven. 93 refuted. 0 times theorem prover too weak. 4106 trivial. 0 not checked. [2023-11-19 07:37:29,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:37:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-19 07:37:30,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:37:30,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678303808] [2023-11-19 07:37:30,187 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:37:30,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292113679] [2023-11-19 07:37:30,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292113679] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:37:30,187 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:37:30,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-19 07:37:30,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654847155] [2023-11-19 07:37:30,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:37:30,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:37:30,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:37:30,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:37:30,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:37:30,191 INFO L87 Difference]: Start difference. First operand 482 states and 764 transitions. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) [2023-11-19 07:37:30,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:37:30,837 INFO L93 Difference]: Finished difference Result 1308 states and 2074 transitions. [2023-11-19 07:37:30,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:37:30,838 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) Word has length 500 [2023-11-19 07:37:30,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:37:30,845 INFO L225 Difference]: With dead ends: 1308 [2023-11-19 07:37:30,845 INFO L226 Difference]: Without dead ends: 829 [2023-11-19 07:37:30,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 991 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:37:30,850 INFO L413 NwaCegarLoop]: 324 mSDtfsCounter, 567 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 208 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:37:30,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [567 Valid, 477 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 208 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:37:30,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 829 states. [2023-11-19 07:37:30,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 829 to 826. [2023-11-19 07:37:30,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 826 states, 636 states have (on average 1.520440251572327) internal successors, (967), 643 states have internal predecessors, (967), 170 states have call successors, (170), 19 states have call predecessors, (170), 19 states have return successors, (170), 163 states have call predecessors, (170), 170 states have call successors, (170) [2023-11-19 07:37:30,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1307 transitions. [2023-11-19 07:37:30,972 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1307 transitions. Word has length 500 [2023-11-19 07:37:30,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:37:30,973 INFO L495 AbstractCegarLoop]: Abstraction has 826 states and 1307 transitions. [2023-11-19 07:37:30,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 3 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 3 states have call predecessors, (80), 3 states have call successors, (80) [2023-11-19 07:37:30,973 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1307 transitions. [2023-11-19 07:37:30,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2023-11-19 07:37:30,998 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:37:30,999 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:37:31,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:37:31,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:31,209 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:37:31,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:37:31,210 INFO L85 PathProgramCache]: Analyzing trace with hash 530319006, now seen corresponding path program 1 times [2023-11-19 07:37:31,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:37:31,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790014136] [2023-11-19 07:37:31,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:31,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:37:31,282 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:37:31,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [515121788] [2023-11-19 07:37:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:37:31,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:37:31,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:37:31,284 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:37:31,313 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_498b2e94-12af-4dbe-a8e2-99b2e34fc200/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:37:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:37:31,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 1168 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-19 07:37:31,834 INFO L285 TraceCheckSpWp]: Computing forward predicates...