./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-57.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_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/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_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-57.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/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_8d29c68b-e365-40b1-8dbe-681e2264f61b/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 0046004d78dce3324da2f2f9d6f041cc4a293921335da3962eaba3f6eb6b0521 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 08:02:21,940 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 08:02:22,081 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 08:02:22,092 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 08:02:22,093 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 08:02:22,135 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 08:02:22,136 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 08:02:22,136 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 08:02:22,137 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 08:02:22,142 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 08:02:22,144 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 08:02:22,144 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 08:02:22,145 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 08:02:22,147 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 08:02:22,147 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 08:02:22,148 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 08:02:22,148 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 08:02:22,148 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 08:02:22,149 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 08:02:22,149 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 08:02:22,150 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 08:02:22,150 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 08:02:22,151 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 08:02:22,152 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 08:02:22,153 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 08:02:22,154 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 08:02:22,154 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 08:02:22,155 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 08:02:22,155 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:02:22,156 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 08:02:22,157 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 08:02:22,157 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 08:02:22,157 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 08:02:22,158 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 08:02:22,158 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 08:02:22,158 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 08:02:22,158 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 08:02:22,159 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 08:02:22,159 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 08:02:22,159 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_8d29c68b-e365-40b1-8dbe-681e2264f61b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0046004d78dce3324da2f2f9d6f041cc4a293921335da3962eaba3f6eb6b0521 [2023-11-19 08:02:22,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 08:02:22,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 08:02:22,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 08:02:22,524 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 08:02:22,525 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 08:02:22,527 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-57.i [2023-11-19 08:02:25,863 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 08:02:26,226 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 08:02:26,227 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-57.i [2023-11-19 08:02:26,240 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/data/c8530f94d/b21b2a8ea93e429fb23b95c8b56f6088/FLAGf0500d921 [2023-11-19 08:02:26,255 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/data/c8530f94d/b21b2a8ea93e429fb23b95c8b56f6088 [2023-11-19 08:02:26,258 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 08:02:26,259 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 08:02:26,261 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 08:02:26,261 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 08:02:26,266 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 08:02:26,267 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:26" (1/1) ... [2023-11-19 08:02:26,268 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dd325ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26, skipping insertion in model container [2023-11-19 08:02:26,268 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 08:02:26" (1/1) ... [2023-11-19 08:02:26,317 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 08:02:26,507 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_8d29c68b-e365-40b1-8dbe-681e2264f61b/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-57.i[916,929] [2023-11-19 08:02:26,693 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:02:26,724 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 08:02:26,743 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_8d29c68b-e365-40b1-8dbe-681e2264f61b/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-57.i[916,929] [2023-11-19 08:02:26,837 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 08:02:26,874 INFO L206 MainTranslator]: Completed translation [2023-11-19 08:02:26,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26 WrapperNode [2023-11-19 08:02:26,874 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 08:02:26,876 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 08:02:26,876 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 08:02:26,877 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 08:02:26,885 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2023-11-19 08:02:26,916 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2023-11-19 08:02:27,018 INFO L138 Inliner]: procedures = 26, calls = 111, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 646 [2023-11-19 08:02:27,018 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 08:02:27,019 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 08:02:27,020 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 08:02:27,021 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 08:02:27,031 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2023-11-19 08:02:27,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2023-11-19 08:02:27,056 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2023-11-19 08:02:27,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2023-11-19 08:02:27,093 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2023-11-19 08:02:27,115 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2023-11-19 08:02:27,122 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2023-11-19 08:02:27,142 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2023-11-19 08:02:27,163 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 08:02:27,165 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 08:02:27,165 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 08:02:27,165 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 08:02:27,166 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (1/1) ... [2023-11-19 08:02:27,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 08:02:27,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:27,201 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 08:02:27,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 08:02:27,247 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 08:02:27,247 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 08:02:27,248 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 08:02:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 08:02:27,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 08:02:27,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 08:02:27,422 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 08:02:27,425 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 08:02:28,740 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 08:02:28,763 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 08:02:28,764 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 08:02:28,777 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:28 BoogieIcfgContainer [2023-11-19 08:02:28,779 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 08:02:28,784 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 08:02:28,786 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 08:02:28,791 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 08:02:28,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 08:02:26" (1/3) ... [2023-11-19 08:02:28,792 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f6d517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:28, skipping insertion in model container [2023-11-19 08:02:28,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 08:02:26" (2/3) ... [2023-11-19 08:02:28,794 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@13f6d517 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 08:02:28, skipping insertion in model container [2023-11-19 08:02:28,794 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 08:02:28" (3/3) ... [2023-11-19 08:02:28,796 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-57.i [2023-11-19 08:02:28,818 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 08:02:28,819 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 08:02:28,897 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 08:02:28,906 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;@1938f6f9, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 08:02:28,906 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 08:02:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand has 266 states, 165 states have (on average 1.5212121212121212) internal successors, (251), 166 states have internal predecessors, (251), 98 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2023-11-19 08:02:28,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-19 08:02:28,961 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:28,963 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:28,963 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:28,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash 804121960, now seen corresponding path program 1 times [2023-11-19 08:02:28,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:28,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583160018] [2023-11-19 08:02:28,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:28,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:29,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:29,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:29,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583160018] [2023-11-19 08:02:29,528 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 08:02:29,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458135899] [2023-11-19 08:02:29,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:29,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:29,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:29,541 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:29,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 08:02:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:29,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 08:02:30,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:30,146 INFO L134 CoverageAnalysis]: Checked inductivity of 19012 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 18818 trivial. 0 not checked. [2023-11-19 08:02:30,146 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:30,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458135899] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:30,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:30,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 08:02:30,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454167150] [2023-11-19 08:02:30,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:30,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 08:02:30,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:30,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 08:02:30,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 08:02:30,190 INFO L87 Difference]: Start difference. First operand has 266 states, 165 states have (on average 1.5212121212121212) internal successors, (251), 166 states have internal predecessors, (251), 98 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) Second operand has 2 states, 2 states have (on average 59.5) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (98), 2 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 2 states have call successors, (98) [2023-11-19 08:02:30,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:30,259 INFO L93 Difference]: Finished difference Result 525 states and 986 transitions. [2023-11-19 08:02:30,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 08:02:30,261 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 59.5) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (98), 2 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 2 states have call successors, (98) Word has length 604 [2023-11-19 08:02:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:30,273 INFO L225 Difference]: With dead ends: 525 [2023-11-19 08:02:30,273 INFO L226 Difference]: Without dead ends: 262 [2023-11-19 08:02:30,280 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 603 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 08:02:30,283 INFO L413 NwaCegarLoop]: 439 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, 439 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 08:02:30,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 439 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:02:30,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2023-11-19 08:02:30,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2023-11-19 08:02:30,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 162 states have (on average 1.5) internal successors, (243), 162 states have internal predecessors, (243), 98 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2023-11-19 08:02:30,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 439 transitions. [2023-11-19 08:02:30,372 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 439 transitions. Word has length 604 [2023-11-19 08:02:30,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:30,373 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 439 transitions. [2023-11-19 08:02:30,373 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 59.5) internal successors, (119), 2 states have internal predecessors, (119), 2 states have call successors, (98), 2 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 2 states have call successors, (98) [2023-11-19 08:02:30,374 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 439 transitions. [2023-11-19 08:02:30,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-19 08:02:30,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:30,395 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:30,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:30,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 08:02:30,618 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:30,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:30,619 INFO L85 PathProgramCache]: Analyzing trace with hash -355059980, now seen corresponding path program 1 times [2023-11-19 08:02:30,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:30,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760292287] [2023-11-19 08:02:30,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:30,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:30,800 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:30,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455994397] [2023-11-19 08:02:30,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:30,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:30,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:30,803 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:30,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 08:02:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:31,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:02:31,289 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:31,448 INFO L134 CoverageAnalysis]: Checked inductivity of 19012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19012 trivial. 0 not checked. [2023-11-19 08:02:31,448 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:31,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:31,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760292287] [2023-11-19 08:02:31,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:31,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455994397] [2023-11-19 08:02:31,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1455994397] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:31,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:31,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:02:31,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889919533] [2023-11-19 08:02:31,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:31,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:31,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:31,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:31,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:31,457 INFO L87 Difference]: Start difference. First operand 262 states and 439 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) [2023-11-19 08:02:31,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:31,567 INFO L93 Difference]: Finished difference Result 675 states and 1138 transitions. [2023-11-19 08:02:31,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:31,568 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) Word has length 604 [2023-11-19 08:02:31,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:31,576 INFO L225 Difference]: With dead ends: 675 [2023-11-19 08:02:31,577 INFO L226 Difference]: Without dead ends: 416 [2023-11-19 08:02:31,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 08:02:31,580 INFO L413 NwaCegarLoop]: 438 mSDtfsCounter, 233 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 868 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:31,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 868 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:02:31,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2023-11-19 08:02:31,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 413. [2023-11-19 08:02:31,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 280 states have (on average 1.5678571428571428) internal successors, (439), 281 states have internal predecessors, (439), 130 states have call successors, (130), 2 states have call predecessors, (130), 2 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 08:02:31,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 699 transitions. [2023-11-19 08:02:31,652 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 699 transitions. Word has length 604 [2023-11-19 08:02:31,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:31,655 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 699 transitions. [2023-11-19 08:02:31,656 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) [2023-11-19 08:02:31,656 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 699 transitions. [2023-11-19 08:02:31,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-19 08:02:31,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:31,663 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:31,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:31,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:31,891 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:31,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:31,891 INFO L85 PathProgramCache]: Analyzing trace with hash 2134468982, now seen corresponding path program 1 times [2023-11-19 08:02:31,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:31,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870334168] [2023-11-19 08:02:31,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:31,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:31,997 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:31,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1727142436] [2023-11-19 08:02:31,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:31,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:31,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:31,999 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:32,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 08:02:32,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:32,449 INFO L262 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:02:32,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 19012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19012 trivial. 0 not checked. [2023-11-19 08:02:32,554 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:32,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:32,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870334168] [2023-11-19 08:02:32,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:32,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727142436] [2023-11-19 08:02:32,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727142436] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:32,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:32,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:02:32,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493208130] [2023-11-19 08:02:32,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:32,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:32,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:32,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:32,561 INFO L87 Difference]: Start difference. First operand 413 states and 699 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) [2023-11-19 08:02:32,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:32,650 INFO L93 Difference]: Finished difference Result 1085 states and 1827 transitions. [2023-11-19 08:02:32,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:32,651 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) Word has length 604 [2023-11-19 08:02:32,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:32,661 INFO L225 Difference]: With dead ends: 1085 [2023-11-19 08:02:32,662 INFO L226 Difference]: Without dead ends: 675 [2023-11-19 08:02:32,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 08:02:32,666 INFO L413 NwaCegarLoop]: 557 mSDtfsCounter, 226 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:32,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [226 Valid, 970 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:02:32,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 675 states. [2023-11-19 08:02:32,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 675 to 672. [2023-11-19 08:02:32,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 463 states have (on average 1.5442764578833694) internal successors, (715), 466 states have internal predecessors, (715), 204 states have call successors, (204), 4 states have call predecessors, (204), 4 states have return successors, (204), 201 states have call predecessors, (204), 204 states have call successors, (204) [2023-11-19 08:02:32,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 1123 transitions. [2023-11-19 08:02:32,757 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 1123 transitions. Word has length 604 [2023-11-19 08:02:32,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:32,759 INFO L495 AbstractCegarLoop]: Abstraction has 672 states and 1123 transitions. [2023-11-19 08:02:32,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) [2023-11-19 08:02:32,760 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 1123 transitions. [2023-11-19 08:02:32,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-19 08:02:32,767 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:32,768 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:32,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:32,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:32,987 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:32,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:32,988 INFO L85 PathProgramCache]: Analyzing trace with hash 762661684, now seen corresponding path program 1 times [2023-11-19 08:02:32,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:32,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512136041] [2023-11-19 08:02:32,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:32,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:33,120 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:33,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1009007196] [2023-11-19 08:02:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:33,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:33,121 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:33,122 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:33,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 08:02:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:33,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 08:02:33,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:33,702 INFO L134 CoverageAnalysis]: Checked inductivity of 19012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19012 trivial. 0 not checked. [2023-11-19 08:02:33,703 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:33,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:33,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512136041] [2023-11-19 08:02:33,704 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:33,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009007196] [2023-11-19 08:02:33,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009007196] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:33,705 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:33,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 08:02:33,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614443229] [2023-11-19 08:02:33,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:33,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 08:02:33,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:33,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 08:02:33,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 08:02:33,711 INFO L87 Difference]: Start difference. First operand 672 states and 1123 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) [2023-11-19 08:02:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:33,795 INFO L93 Difference]: Finished difference Result 1358 states and 2264 transitions. [2023-11-19 08:02:33,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 08:02:33,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) Word has length 604 [2023-11-19 08:02:33,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:33,803 INFO L225 Difference]: With dead ends: 1358 [2023-11-19 08:02:33,803 INFO L226 Difference]: Without dead ends: 689 [2023-11-19 08:02:33,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 08:02:33,811 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 213 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 912 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:33,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 912 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 08:02:33,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2023-11-19 08:02:33,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 489. [2023-11-19 08:02:33,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 489 states, 355 states have (on average 1.5774647887323943) internal successors, (560), 356 states have internal predecessors, (560), 130 states have call successors, (130), 3 states have call predecessors, (130), 3 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 08:02:33,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 489 states to 489 states and 820 transitions. [2023-11-19 08:02:33,886 INFO L78 Accepts]: Start accepts. Automaton has 489 states and 820 transitions. Word has length 604 [2023-11-19 08:02:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:33,889 INFO L495 AbstractCegarLoop]: Abstraction has 489 states and 820 transitions. [2023-11-19 08:02:33,889 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 1 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) [2023-11-19 08:02:33,890 INFO L276 IsEmpty]: Start isEmpty. Operand 489 states and 820 transitions. [2023-11-19 08:02:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-19 08:02:33,896 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:33,896 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:33,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:34,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:34,120 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:34,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:34,121 INFO L85 PathProgramCache]: Analyzing trace with hash 903210294, now seen corresponding path program 1 times [2023-11-19 08:02:34,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:34,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407914606] [2023-11-19 08:02:34,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:34,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:34,236 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:34,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1572353957] [2023-11-19 08:02:34,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:34,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:34,238 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:34,239 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:34,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 08:02:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:34,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 1362 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 08:02:34,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:35,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19012 backedges. 7623 proven. 78 refuted. 0 times theorem prover too weak. 11311 trivial. 0 not checked. [2023-11-19 08:02:35,087 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 19012 backedges. 213 proven. 78 refuted. 0 times theorem prover too weak. 18721 trivial. 0 not checked. [2023-11-19 08:02:35,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:35,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407914606] [2023-11-19 08:02:35,663 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:35,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572353957] [2023-11-19 08:02:35,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572353957] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:35,664 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:02:35,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-19 08:02:35,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817342706] [2023-11-19 08:02:35,665 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:35,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 08:02:35,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:35,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 08:02:35,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 08:02:35,669 INFO L87 Difference]: Start difference. First operand 489 states and 820 transitions. Second operand has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 3 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 3 states have call predecessors, (125), 3 states have call successors, (125) [2023-11-19 08:02:36,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:36,309 INFO L93 Difference]: Finished difference Result 985 states and 1646 transitions. [2023-11-19 08:02:36,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 08:02:36,310 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 3 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 3 states have call predecessors, (125), 3 states have call successors, (125) Word has length 604 [2023-11-19 08:02:36,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:36,315 INFO L225 Difference]: With dead ends: 985 [2023-11-19 08:02:36,316 INFO L226 Difference]: Without dead ends: 499 [2023-11-19 08:02:36,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1210 GetRequests, 1200 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-19 08:02:36,319 INFO L413 NwaCegarLoop]: 335 mSDtfsCounter, 274 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 515 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:36,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [345 Valid, 807 Invalid, 515 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 08:02:36,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2023-11-19 08:02:36,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 493. [2023-11-19 08:02:36,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 358 states have (on average 1.5614525139664805) internal successors, (559), 359 states have internal predecessors, (559), 130 states have call successors, (130), 4 states have call predecessors, (130), 4 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 08:02:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 819 transitions. [2023-11-19 08:02:36,376 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 819 transitions. Word has length 604 [2023-11-19 08:02:36,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:36,378 INFO L495 AbstractCegarLoop]: Abstraction has 493 states and 819 transitions. [2023-11-19 08:02:36,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.75) internal successors, (166), 8 states have internal predecessors, (166), 3 states have call successors, (124), 2 states have call predecessors, (124), 4 states have return successors, (125), 3 states have call predecessors, (125), 3 states have call successors, (125) [2023-11-19 08:02:36,379 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 819 transitions. [2023-11-19 08:02:36,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2023-11-19 08:02:36,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:36,385 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:36,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:36,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:36,599 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:36,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:36,599 INFO L85 PathProgramCache]: Analyzing trace with hash 879225859, now seen corresponding path program 1 times [2023-11-19 08:02:36,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:36,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339558519] [2023-11-19 08:02:36,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:36,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:36,689 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:36,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [920396331] [2023-11-19 08:02:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:36,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:36,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:36,692 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:36,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 08:02:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:37,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 1365 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 08:02:37,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 19012 backedges. 861 proven. 285 refuted. 0 times theorem prover too weak. 17866 trivial. 0 not checked. [2023-11-19 08:02:38,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 19012 backedges. 6 proven. 285 refuted. 0 times theorem prover too weak. 18721 trivial. 0 not checked. [2023-11-19 08:02:38,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:38,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339558519] [2023-11-19 08:02:38,749 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:38,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920396331] [2023-11-19 08:02:38,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920396331] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 08:02:38,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-19 08:02:38,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-19 08:02:38,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521091250] [2023-11-19 08:02:38,750 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-19 08:02:38,752 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 08:02:38,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:38,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 08:02:38,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:02:38,754 INFO L87 Difference]: Start difference. First operand 493 states and 819 transitions. Second operand has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (193), 2 states have call predecessors, (193), 4 states have return successors, (194), 2 states have call predecessors, (194), 2 states have call successors, (194) [2023-11-19 08:02:39,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:39,991 INFO L93 Difference]: Finished difference Result 1037 states and 1713 transitions. [2023-11-19 08:02:39,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 08:02:39,996 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (193), 2 states have call predecessors, (193), 4 states have return successors, (194), 2 states have call predecessors, (194), 2 states have call successors, (194) Word has length 605 [2023-11-19 08:02:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:40,002 INFO L225 Difference]: With dead ends: 1037 [2023-11-19 08:02:40,002 INFO L226 Difference]: Without dead ends: 547 [2023-11-19 08:02:40,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1213 GetRequests, 1198 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-19 08:02:40,006 INFO L413 NwaCegarLoop]: 322 mSDtfsCounter, 180 mSDsluCounter, 1332 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 1432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:40,006 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 1654 Invalid, 1432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 08:02:40,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2023-11-19 08:02:40,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 505. [2023-11-19 08:02:40,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 505 states, 368 states have (on average 1.546195652173913) internal successors, (569), 369 states have internal predecessors, (569), 130 states have call successors, (130), 6 states have call predecessors, (130), 6 states have return successors, (130), 129 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-19 08:02:40,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 505 states to 505 states and 829 transitions. [2023-11-19 08:02:40,088 INFO L78 Accepts]: Start accepts. Automaton has 505 states and 829 transitions. Word has length 605 [2023-11-19 08:02:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:40,089 INFO L495 AbstractCegarLoop]: Abstraction has 505 states and 829 transitions. [2023-11-19 08:02:40,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.818181818181818) internal successors, (130), 11 states have internal predecessors, (130), 2 states have call successors, (193), 2 states have call predecessors, (193), 4 states have return successors, (194), 2 states have call predecessors, (194), 2 states have call successors, (194) [2023-11-19 08:02:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 505 states and 829 transitions. [2023-11-19 08:02:40,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2023-11-19 08:02:40,100 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:40,100 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:40,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:40,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 08:02:40,324 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:40,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:40,325 INFO L85 PathProgramCache]: Analyzing trace with hash -131891391, now seen corresponding path program 1 times [2023-11-19 08:02:40,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:40,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929728521] [2023-11-19 08:02:40,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:40,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:40,452 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:40,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1870069166] [2023-11-19 08:02:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:40,484 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:40,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:40,488 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:40,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 08:02:41,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:41,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 1363 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-19 08:02:41,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:42,614 INFO L134 CoverageAnalysis]: Checked inductivity of 19012 backedges. 9003 proven. 108 refuted. 0 times theorem prover too weak. 9901 trivial. 0 not checked. [2023-11-19 08:02:42,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:02:43,452 INFO L134 CoverageAnalysis]: Checked inductivity of 19012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 19012 trivial. 0 not checked. [2023-11-19 08:02:43,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:43,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929728521] [2023-11-19 08:02:43,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:43,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870069166] [2023-11-19 08:02:43,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870069166] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 08:02:43,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:02:43,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 11 [2023-11-19 08:02:43,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005586355] [2023-11-19 08:02:43,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:43,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 08:02:43,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:43,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 08:02:43,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2023-11-19 08:02:43,457 INFO L87 Difference]: Start difference. First operand 505 states and 829 transitions. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 1 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) [2023-11-19 08:02:45,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:45,209 INFO L93 Difference]: Finished difference Result 3509 states and 5769 transitions. [2023-11-19 08:02:45,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 08:02:45,210 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 1 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) Word has length 605 [2023-11-19 08:02:45,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:45,233 INFO L225 Difference]: With dead ends: 3509 [2023-11-19 08:02:45,234 INFO L226 Difference]: Without dead ends: 3007 [2023-11-19 08:02:45,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1212 GetRequests, 1201 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-19 08:02:45,237 INFO L413 NwaCegarLoop]: 733 mSDtfsCounter, 1635 mSDsluCounter, 1952 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1635 SdHoareTripleChecker+Valid, 2685 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:45,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1635 Valid, 2685 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 08:02:45,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3007 states. [2023-11-19 08:02:45,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3007 to 2979. [2023-11-19 08:02:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2979 states, 2162 states have (on average 1.5485661424606845) internal successors, (3348), 2168 states have internal predecessors, (3348), 780 states have call successors, (780), 36 states have call predecessors, (780), 36 states have return successors, (780), 774 states have call predecessors, (780), 780 states have call successors, (780) [2023-11-19 08:02:45,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2979 states to 2979 states and 4908 transitions. [2023-11-19 08:02:45,816 INFO L78 Accepts]: Start accepts. Automaton has 2979 states and 4908 transitions. Word has length 605 [2023-11-19 08:02:45,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:45,817 INFO L495 AbstractCegarLoop]: Abstraction has 2979 states and 4908 transitions. [2023-11-19 08:02:45,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 1 states have call successors, (98), 1 states have call predecessors, (98), 1 states have return successors, (98), 1 states have call predecessors, (98), 1 states have call successors, (98) [2023-11-19 08:02:45,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2979 states and 4908 transitions. [2023-11-19 08:02:45,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2023-11-19 08:02:45,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:45,826 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:45,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:46,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 08:02:46,036 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:46,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:46,037 INFO L85 PathProgramCache]: Analyzing trace with hash 569708483, now seen corresponding path program 1 times [2023-11-19 08:02:46,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:46,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861987936] [2023-11-19 08:02:46,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:46,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:46,115 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:46,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [895690236] [2023-11-19 08:02:46,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:46,115 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:46,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:46,117 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:46,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 08:02:46,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:46,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:02:46,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 19012 backedges. 768 proven. 0 refuted. 0 times theorem prover too weak. 18244 trivial. 0 not checked. [2023-11-19 08:02:49,012 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 08:02:49,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:02:49,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861987936] [2023-11-19 08:02:49,013 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:02:49,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895690236] [2023-11-19 08:02:49,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [895690236] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 08:02:49,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 08:02:49,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-19 08:02:49,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674736219] [2023-11-19 08:02:49,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 08:02:49,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 08:02:49,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:02:49,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 08:02:49,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 08:02:49,017 INFO L87 Difference]: Start difference. First operand 2979 states and 4908 transitions. Second operand has 10 states, 10 states have (on average 12.1) internal successors, (121), 9 states have internal predecessors, (121), 2 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (98), 2 states have call predecessors, (98), 2 states have call successors, (98) [2023-11-19 08:02:51,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 08:02:51,938 INFO L93 Difference]: Finished difference Result 12293 states and 20128 transitions. [2023-11-19 08:02:51,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-19 08:02:51,939 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 9 states have internal predecessors, (121), 2 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (98), 2 states have call predecessors, (98), 2 states have call successors, (98) Word has length 605 [2023-11-19 08:02:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 08:02:52,014 INFO L225 Difference]: With dead ends: 12293 [2023-11-19 08:02:52,015 INFO L226 Difference]: Without dead ends: 9317 [2023-11-19 08:02:52,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 609 GetRequests, 596 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2023-11-19 08:02:52,028 INFO L413 NwaCegarLoop]: 790 mSDtfsCounter, 478 mSDsluCounter, 2873 mSDsCounter, 0 mSdLazyCounter, 1869 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 3663 SdHoareTripleChecker+Invalid, 2074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-19 08:02:52,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 3663 Invalid, 2074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1869 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-19 08:02:52,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9317 states. [2023-11-19 08:02:53,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9317 to 7459. [2023-11-19 08:02:53,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7459 states, 5310 states have (on average 1.5009416195856873) internal successors, (7970), 5346 states have internal predecessors, (7970), 2028 states have call successors, (2028), 120 states have call predecessors, (2028), 120 states have return successors, (2028), 1992 states have call predecessors, (2028), 2028 states have call successors, (2028) [2023-11-19 08:02:53,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7459 states to 7459 states and 12026 transitions. [2023-11-19 08:02:53,590 INFO L78 Accepts]: Start accepts. Automaton has 7459 states and 12026 transitions. Word has length 605 [2023-11-19 08:02:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 08:02:53,591 INFO L495 AbstractCegarLoop]: Abstraction has 7459 states and 12026 transitions. [2023-11-19 08:02:53,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.1) internal successors, (121), 9 states have internal predecessors, (121), 2 states have call successors, (98), 2 states have call predecessors, (98), 2 states have return successors, (98), 2 states have call predecessors, (98), 2 states have call successors, (98) [2023-11-19 08:02:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 7459 states and 12026 transitions. [2023-11-19 08:02:53,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2023-11-19 08:02:53,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 08:02:53,603 INFO L195 NwaCegarLoop]: trace histogram [98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 08:02:53,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 08:02:53,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:53,812 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 08:02:53,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 08:02:53,813 INFO L85 PathProgramCache]: Analyzing trace with hash 673923090, now seen corresponding path program 1 times [2023-11-19 08:02:53,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 08:02:53,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964003822] [2023-11-19 08:02:53,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:53,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 08:02:53,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 08:02:53,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [111874003] [2023-11-19 08:02:53,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 08:02:53,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 08:02:53,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 08:02:53,905 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 08:02:53,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8d29c68b-e365-40b1-8dbe-681e2264f61b/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 08:02:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 08:02:54,420 INFO L262 TraceCheckSpWp]: Trace formula consists of 1363 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-19 08:02:54,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 08:02:56,678 INFO L134 CoverageAnalysis]: Checked inductivity of 19012 backedges. 12675 proven. 78 refuted. 0 times theorem prover too weak. 6259 trivial. 0 not checked. [2023-11-19 08:02:56,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 08:03:01,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 08:03:01,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964003822] [2023-11-19 08:03:01,205 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 08:03:01,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111874003] [2023-11-19 08:03:01,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111874003] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 08:03:01,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 08:03:01,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-19 08:03:01,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210063299] [2023-11-19 08:03:01,206 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 08:03:01,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 08:03:01,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 08:03:01,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 08:03:01,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2023-11-19 08:03:01,209 INFO L87 Difference]: Start difference. First operand 7459 states and 12026 transitions. Second operand has 10 states, 10 states have (on average 13.1) internal successors, (131), 10 states have internal predecessors, (131), 4 states have call successors, (98), 4 states have call predecessors, (98), 5 states have return successors, (98), 4 states have call predecessors, (98), 4 states have call successors, (98) [2023-11-19 08:03:06,028 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-19 08:03:08,161 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-19 08:03:10,185 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-19 08:03:12,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0]