./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl --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 fb963e37b33825ce0294e2e8f217c8677b17169f1936b98a544da3476a4e00cd --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:22:35,545 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:22:35,648 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:22:35,654 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:22:35,655 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:22:35,679 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:22:35,680 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:22:35,681 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:22:35,682 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:22:35,682 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:22:35,683 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:22:35,684 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:22:35,684 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:22:35,685 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:22:35,686 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:22:35,686 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:22:35,687 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:22:35,687 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:22:35,688 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:22:35,688 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:22:35,689 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:22:35,690 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:22:35,690 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:22:35,691 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:22:35,692 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:22:35,692 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:22:35,693 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:22:35,694 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:22:35,694 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:22:35,695 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:22:35,695 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:22:35,696 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:22:35,696 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:22:35,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:22:35,697 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:22:35,698 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:22:35,698 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:22:35,699 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:22:35,699 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:22:35,699 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_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fb963e37b33825ce0294e2e8f217c8677b17169f1936b98a544da3476a4e00cd [2023-11-12 02:22:35,952 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:22:35,984 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:22:35,987 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:22:35,989 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:22:35,990 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:22:35,991 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i [2023-11-12 02:22:39,206 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:22:39,461 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:22:39,461 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i [2023-11-12 02:22:39,478 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/data/972b93b37/e9c14a6b3c214046a765b4f12dbd2940/FLAG17cd80a9c [2023-11-12 02:22:39,492 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/data/972b93b37/e9c14a6b3c214046a765b4f12dbd2940 [2023-11-12 02:22:39,495 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:22:39,497 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:22:39,498 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:39,498 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:22:39,509 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:22:39,511 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:39" (1/1) ... [2023-11-12 02:22:39,513 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61481b8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:39, skipping insertion in model container [2023-11-12 02:22:39,513 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:22:39" (1/1) ... [2023-11-12 02:22:39,560 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:22:39,720 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_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i[916,929] [2023-11-12 02:22:39,879 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:39,924 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:22:39,935 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_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodesize_ps-cn-250_file-52.i[916,929] [2023-11-12 02:22:40,003 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:22:40,025 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:22:40,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:40 WrapperNode [2023-11-12 02:22:40,026 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:22:40,027 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:40,027 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:22:40,028 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:22:40,035 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:40" (1/1) ... [2023-11-12 02:22:40,055 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:40" (1/1) ... [2023-11-12 02:22:40,120 INFO L138 Inliner]: procedures = 26, calls = 86, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 541 [2023-11-12 02:22:40,121 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:22:40,122 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:22:40,122 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:22:40,122 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:22:40,132 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:40" (1/1) ... [2023-11-12 02:22:40,132 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:40" (1/1) ... [2023-11-12 02:22:40,139 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:40" (1/1) ... [2023-11-12 02:22:40,139 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:40" (1/1) ... [2023-11-12 02:22:40,169 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:40" (1/1) ... [2023-11-12 02:22:40,177 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:40" (1/1) ... [2023-11-12 02:22:40,182 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:40" (1/1) ... [2023-11-12 02:22:40,187 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:40" (1/1) ... [2023-11-12 02:22:40,197 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:22:40,198 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:22:40,198 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:22:40,198 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:22:40,199 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:40" (1/1) ... [2023-11-12 02:22:40,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:22:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:40,249 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:22:40,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:22:40,295 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:22:40,295 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:22:40,296 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:22:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:22:40,296 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:22:40,296 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:22:40,554 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:22:40,557 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:22:41,311 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:22:41,322 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:22:41,324 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:22:41,327 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:41 BoogieIcfgContainer [2023-11-12 02:22:41,327 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:22:41,332 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:22:41,332 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:22:41,335 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:22:41,335 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:22:39" (1/3) ... [2023-11-12 02:22:41,336 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f35a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:41, skipping insertion in model container [2023-11-12 02:22:41,336 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:22:40" (2/3) ... [2023-11-12 02:22:41,337 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39f35a3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:22:41, skipping insertion in model container [2023-11-12 02:22:41,337 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:22:41" (3/3) ... [2023-11-12 02:22:41,340 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodesize_ps-cn-250_file-52.i [2023-11-12 02:22:41,360 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:22:41,360 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:22:41,438 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:22:41,446 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;@62a8ece1, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:22:41,447 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:22:41,455 INFO L276 IsEmpty]: Start isEmpty. Operand has 213 states, 137 states have (on average 1.5693430656934306) internal successors, (215), 138 states have internal predecessors, (215), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-12 02:22:41,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-12 02:22:41,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:41,491 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:41,492 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:41,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2114910543, now seen corresponding path program 1 times [2023-11-12 02:22:41,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:41,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708175839] [2023-11-12 02:22:41,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:41,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:41,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:42,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:42,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708175839] [2023-11-12 02:22:42,012 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-12 02:22:42,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012663395] [2023-11-12 02:22:42,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:42,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:42,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:42,016 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:42,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:22:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:42,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-12 02:22:42,478 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:42,616 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 144 proven. 0 refuted. 0 times theorem prover too weak. 10368 trivial. 0 not checked. [2023-11-12 02:22:42,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:42,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012663395] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:42,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:42,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:22:42,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487342038] [2023-11-12 02:22:42,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:42,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-12 02:22:42,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:42,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-12 02:22:42,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:22:42,665 INFO L87 Difference]: Start difference. First operand has 213 states, 137 states have (on average 1.5693430656934306) internal successors, (215), 138 states have internal predecessors, (215), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Second operand has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-12 02:22:42,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:42,732 INFO L93 Difference]: Finished difference Result 419 states and 789 transitions. [2023-11-12 02:22:42,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-12 02:22:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 2 states have call successors, (73) Word has length 459 [2023-11-12 02:22:42,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:42,775 INFO L225 Difference]: With dead ends: 419 [2023-11-12 02:22:42,777 INFO L226 Difference]: Without dead ends: 209 [2023-11-12 02:22:42,788 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-12 02:22:42,795 INFO L413 NwaCegarLoop]: 353 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:42,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:22:42,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-12 02:22:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 209. [2023-11-12 02:22:42,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 134 states have (on average 1.544776119402985) internal successors, (207), 134 states have internal predecessors, (207), 73 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2023-11-12 02:22:42,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 353 transitions. [2023-11-12 02:22:42,877 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 353 transitions. Word has length 459 [2023-11-12 02:22:42,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:42,878 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 353 transitions. [2023-11-12 02:22:42,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 49.5) internal successors, (99), 2 states have internal predecessors, (99), 2 states have call successors, (73), 2 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 2 states have call successors, (73) [2023-11-12 02:22:42,879 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 353 transitions. [2023-11-12 02:22:42,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2023-11-12 02:22:42,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:42,903 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:42,916 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:43,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-12 02:22:43,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:43,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:43,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1238988531, now seen corresponding path program 1 times [2023-11-12 02:22:43,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:43,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822431519] [2023-11-12 02:22:43,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:43,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:43,273 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:43,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1833827474] [2023-11-12 02:22:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:43,278 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:43,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:43,280 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:43,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:22:43,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:43,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 1103 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:22:43,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:44,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-12 02:22:44,587 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:44,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:44,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822431519] [2023-11-12 02:22:44,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:44,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833827474] [2023-11-12 02:22:44,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833827474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:44,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:44,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-12 02:22:44,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020530714] [2023-11-12 02:22:44,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:44,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:44,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:44,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:44,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:44,600 INFO L87 Difference]: Start difference. First operand 209 states and 353 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-12 02:22:44,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:44,747 INFO L93 Difference]: Finished difference Result 621 states and 1053 transitions. [2023-11-12 02:22:44,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:44,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 459 [2023-11-12 02:22:44,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:44,764 INFO L225 Difference]: With dead ends: 621 [2023-11-12 02:22:44,764 INFO L226 Difference]: Without dead ends: 415 [2023-11-12 02:22:44,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:22:44,767 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 136 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 743 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:44,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [136 Valid, 743 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:22:44,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2023-11-12 02:22:44,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 412. [2023-11-12 02:22:44,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 263 states have (on average 1.543726235741445) internal successors, (406), 263 states have internal predecessors, (406), 146 states have call successors, (146), 2 states have call predecessors, (146), 2 states have return successors, (146), 146 states have call predecessors, (146), 146 states have call successors, (146) [2023-11-12 02:22:44,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 698 transitions. [2023-11-12 02:22:44,910 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 698 transitions. Word has length 459 [2023-11-12 02:22:44,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:44,913 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 698 transitions. [2023-11-12 02:22:44,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 2 states have internal predecessors, (97), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-12 02:22:44,914 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 698 transitions. [2023-11-12 02:22:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-12 02:22:44,929 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:44,930 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:44,943 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 02:22:45,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:45,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:45,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:45,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1266655132, now seen corresponding path program 1 times [2023-11-12 02:22:45,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:45,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808925469] [2023-11-12 02:22:45,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:45,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:45,265 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:45,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728652195] [2023-11-12 02:22:45,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:45,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:45,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:45,270 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:45,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:22:45,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:45,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 1106 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:22:45,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-12 02:22:46,385 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:46,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:46,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808925469] [2023-11-12 02:22:46,386 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:46,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728652195] [2023-11-12 02:22:46,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728652195] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:46,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:46,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:46,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124780666] [2023-11-12 02:22:46,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:46,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:22:46,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:46,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:22:46,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:46,391 INFO L87 Difference]: Start difference. First operand 412 states and 698 transitions. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-12 02:22:47,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:47,188 INFO L93 Difference]: Finished difference Result 1461 states and 2484 transitions. [2023-11-12 02:22:47,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:47,189 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 460 [2023-11-12 02:22:47,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:47,200 INFO L225 Difference]: With dead ends: 1461 [2023-11-12 02:22:47,200 INFO L226 Difference]: Without dead ends: 1052 [2023-11-12 02:22:47,202 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 456 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:22:47,206 INFO L413 NwaCegarLoop]: 406 mSDtfsCounter, 342 mSDsluCounter, 806 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 1212 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:47,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 1212 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-12 02:22:47,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-11-12 02:22:47,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1043. [2023-11-12 02:22:47,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 698 states have (on average 1.5759312320916905) internal successors, (1100), 700 states have internal predecessors, (1100), 338 states have call successors, (338), 6 states have call predecessors, (338), 6 states have return successors, (338), 336 states have call predecessors, (338), 338 states have call successors, (338) [2023-11-12 02:22:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1776 transitions. [2023-11-12 02:22:47,398 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1776 transitions. Word has length 460 [2023-11-12 02:22:47,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:47,399 INFO L495 AbstractCegarLoop]: Abstraction has 1043 states and 1776 transitions. [2023-11-12 02:22:47,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 4 states have internal predecessors, (98), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-12 02:22:47,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1776 transitions. [2023-11-12 02:22:47,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 461 [2023-11-12 02:22:47,405 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:47,406 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:47,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:47,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:47,614 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:47,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1846108507, now seen corresponding path program 1 times [2023-11-12 02:22:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:47,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101345415] [2023-11-12 02:22:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:47,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:47,729 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:47,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1544715385] [2023-11-12 02:22:47,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:47,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:47,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:47,731 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:47,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:22:48,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:48,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 1104 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-12 02:22:48,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:48,754 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-12 02:22:48,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:48,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:48,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101345415] [2023-11-12 02:22:48,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:48,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544715385] [2023-11-12 02:22:48,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1544715385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:48,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:48,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:22:48,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517776313] [2023-11-12 02:22:48,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:48,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:48,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:48,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:48,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:48,760 INFO L87 Difference]: Start difference. First operand 1043 states and 1776 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-12 02:22:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:49,039 INFO L93 Difference]: Finished difference Result 2197 states and 3738 transitions. [2023-11-12 02:22:49,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:22:49,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 460 [2023-11-12 02:22:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:49,052 INFO L225 Difference]: With dead ends: 2197 [2023-11-12 02:22:49,052 INFO L226 Difference]: Without dead ends: 1157 [2023-11-12 02:22:49,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:49,063 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 391 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1230 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:49,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1230 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:22:49,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1157 states. [2023-11-12 02:22:49,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1157 to 1149. [2023-11-12 02:22:49,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 780 states have (on average 1.5807692307692307) internal successors, (1233), 783 states have internal predecessors, (1233), 361 states have call successors, (361), 7 states have call predecessors, (361), 7 states have return successors, (361), 358 states have call predecessors, (361), 361 states have call successors, (361) [2023-11-12 02:22:49,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1955 transitions. [2023-11-12 02:22:49,272 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1955 transitions. Word has length 460 [2023-11-12 02:22:49,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:49,274 INFO L495 AbstractCegarLoop]: Abstraction has 1149 states and 1955 transitions. [2023-11-12 02:22:49,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 3 states have internal predecessors, (98), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-12 02:22:49,274 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1955 transitions. [2023-11-12 02:22:49,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-12 02:22:49,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:49,282 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:49,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:49,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:49,495 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:49,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:49,496 INFO L85 PathProgramCache]: Analyzing trace with hash -983725337, now seen corresponding path program 1 times [2023-11-12 02:22:49,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:49,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774804430] [2023-11-12 02:22:49,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:49,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:49,577 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:49,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [615766594] [2023-11-12 02:22:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:49,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:49,578 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:49,579 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:49,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:22:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:49,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:22:49,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-12 02:22:49,991 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:22:49,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:49,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774804430] [2023-11-12 02:22:49,992 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:49,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615766594] [2023-11-12 02:22:49,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615766594] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:22:49,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:22:49,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:22:49,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653548392] [2023-11-12 02:22:49,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:49,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:22:49,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:49,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:22:49,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:22:49,995 INFO L87 Difference]: Start difference. First operand 1149 states and 1955 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-12 02:22:50,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:50,361 INFO L93 Difference]: Finished difference Result 4883 states and 8267 transitions. [2023-11-12 02:22:50,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:22:50,362 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 461 [2023-11-12 02:22:50,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:50,390 INFO L225 Difference]: With dead ends: 4883 [2023-11-12 02:22:50,391 INFO L226 Difference]: Without dead ends: 3737 [2023-11-12 02:22:50,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:22:50,397 INFO L413 NwaCegarLoop]: 433 mSDtfsCounter, 714 mSDsluCounter, 857 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 714 SdHoareTripleChecker+Valid, 1290 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:50,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [714 Valid, 1290 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:22:50,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3737 states. [2023-11-12 02:22:50,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3737 to 3723. [2023-11-12 02:22:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3723 states, 2586 states have (on average 1.5699922660479506) internal successors, (4060), 2606 states have internal predecessors, (4060), 1108 states have call successors, (1108), 28 states have call predecessors, (1108), 28 states have return successors, (1108), 1088 states have call predecessors, (1108), 1108 states have call successors, (1108) [2023-11-12 02:22:50,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3723 states to 3723 states and 6276 transitions. [2023-11-12 02:22:50,876 INFO L78 Accepts]: Start accepts. Automaton has 3723 states and 6276 transitions. Word has length 461 [2023-11-12 02:22:50,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:50,879 INFO L495 AbstractCegarLoop]: Abstraction has 3723 states and 6276 transitions. [2023-11-12 02:22:50,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-12 02:22:50,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3723 states and 6276 transitions. [2023-11-12 02:22:50,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2023-11-12 02:22:50,886 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:50,886 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:50,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:51,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:51,094 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:51,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:51,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1622298217, now seen corresponding path program 1 times [2023-11-12 02:22:51,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:51,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791607442] [2023-11-12 02:22:51,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:51,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:51,185 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:51,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [498757368] [2023-11-12 02:22:51,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:51,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:51,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:51,187 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:51,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:22:51,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:51,547 INFO L262 TraceCheckSpWp]: Trace formula consists of 1110 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:22:51,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 5218 proven. 123 refuted. 0 times theorem prover too weak. 5171 trivial. 0 not checked. [2023-11-12 02:22:52,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 93 proven. 123 refuted. 0 times theorem prover too weak. 10296 trivial. 0 not checked. [2023-11-12 02:22:52,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:52,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791607442] [2023-11-12 02:22:52,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:52,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498757368] [2023-11-12 02:22:52,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498757368] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:52,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:52,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:22:52,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49629624] [2023-11-12 02:22:52,460 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:52,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:22:52,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:52,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:22:52,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:22:52,463 INFO L87 Difference]: Start difference. First operand 3723 states and 6276 transitions. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-12 02:22:53,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:53,053 INFO L93 Difference]: Finished difference Result 6059 states and 10196 transitions. [2023-11-12 02:22:53,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:22:53,054 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) Word has length 461 [2023-11-12 02:22:53,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:53,076 INFO L225 Difference]: With dead ends: 6059 [2023-11-12 02:22:53,076 INFO L226 Difference]: Without dead ends: 2339 [2023-11-12 02:22:53,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 914 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:22:53,090 INFO L413 NwaCegarLoop]: 269 mSDtfsCounter, 197 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:53,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 657 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:22:53,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2023-11-12 02:22:53,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 2311. [2023-11-12 02:22:53,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 1566 states have (on average 1.5472541507024267) internal successors, (2423), 1572 states have internal predecessors, (2423), 722 states have call successors, (722), 22 states have call predecessors, (722), 22 states have return successors, (722), 716 states have call predecessors, (722), 722 states have call successors, (722) [2023-11-12 02:22:53,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 3867 transitions. [2023-11-12 02:22:53,496 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 3867 transitions. Word has length 461 [2023-11-12 02:22:53,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:53,497 INFO L495 AbstractCegarLoop]: Abstraction has 2311 states and 3867 transitions. [2023-11-12 02:22:53,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-12 02:22:53,498 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 3867 transitions. [2023-11-12 02:22:53,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-12 02:22:53,503 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:53,504 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:53,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:53,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:53,712 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:53,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:53,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1085110978, now seen corresponding path program 1 times [2023-11-12 02:22:53,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:53,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558809867] [2023-11-12 02:22:53,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:53,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:53,778 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:53,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2065922743] [2023-11-12 02:22:53,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:53,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:53,779 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:53,780 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:53,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:22:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:54,157 INFO L262 TraceCheckSpWp]: Trace formula consists of 1109 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-12 02:22:54,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:54,358 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 2676 proven. 30 refuted. 0 times theorem prover too weak. 7806 trivial. 0 not checked. [2023-11-12 02:22:54,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:54,678 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 186 proven. 30 refuted. 0 times theorem prover too weak. 10296 trivial. 0 not checked. [2023-11-12 02:22:54,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:54,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558809867] [2023-11-12 02:22:54,679 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:54,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065922743] [2023-11-12 02:22:54,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065922743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:22:54,679 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:22:54,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-12 02:22:54,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338958300] [2023-11-12 02:22:54,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:22:54,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:22:54,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:22:54,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:22:54,683 INFO L87 Difference]: Start difference. First operand 2311 states and 3867 transitions. Second operand has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-12 02:22:55,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:55,295 INFO L93 Difference]: Finished difference Result 4695 states and 7799 transitions. [2023-11-12 02:22:55,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:22:55,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) Word has length 463 [2023-11-12 02:22:55,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:55,315 INFO L225 Difference]: With dead ends: 4695 [2023-11-12 02:22:55,315 INFO L226 Difference]: Without dead ends: 2387 [2023-11-12 02:22:55,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 918 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:22:55,331 INFO L413 NwaCegarLoop]: 267 mSDtfsCounter, 232 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 388 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 388 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:55,331 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 652 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 388 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:22:55,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2023-11-12 02:22:55,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2343. [2023-11-12 02:22:55,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2343 states, 1590 states have (on average 1.530188679245283) internal successors, (2433), 1596 states have internal predecessors, (2433), 722 states have call successors, (722), 30 states have call predecessors, (722), 30 states have return successors, (722), 716 states have call predecessors, (722), 722 states have call successors, (722) [2023-11-12 02:22:55,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2343 states to 2343 states and 3877 transitions. [2023-11-12 02:22:55,675 INFO L78 Accepts]: Start accepts. Automaton has 2343 states and 3877 transitions. Word has length 463 [2023-11-12 02:22:55,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:55,676 INFO L495 AbstractCegarLoop]: Abstraction has 2343 states and 3877 transitions. [2023-11-12 02:22:55,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.714285714285714) internal successors, (110), 7 states have internal predecessors, (110), 2 states have call successors, (83), 2 states have call predecessors, (83), 4 states have return successors, (84), 2 states have call predecessors, (84), 2 states have call successors, (84) [2023-11-12 02:22:55,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2343 states and 3877 transitions. [2023-11-12 02:22:55,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 464 [2023-11-12 02:22:55,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:55,683 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:55,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:55,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:55,891 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:55,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:55,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1286628284, now seen corresponding path program 1 times [2023-11-12 02:22:55,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:55,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185877943] [2023-11-12 02:22:55,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:55,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:55,967 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:55,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [375617631] [2023-11-12 02:22:55,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:55,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:55,972 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:55,973 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:55,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:22:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:56,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:22:56,356 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:22:57,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 6958 proven. 63 refuted. 0 times theorem prover too weak. 3491 trivial. 0 not checked. [2023-11-12 02:22:57,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:22:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-12 02:22:57,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:22:57,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185877943] [2023-11-12 02:22:57,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:22:57,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375617631] [2023-11-12 02:22:57,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375617631] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:22:57,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:22:57,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2023-11-12 02:22:57,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055844814] [2023-11-12 02:22:57,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:22:57,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:22:57,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:22:57,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:22:57,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:22:57,425 INFO L87 Difference]: Start difference. First operand 2343 states and 3877 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-12 02:22:57,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:22:57,634 INFO L93 Difference]: Finished difference Result 4697 states and 7779 transitions. [2023-11-12 02:22:57,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:22:57,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 463 [2023-11-12 02:22:57,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:22:57,656 INFO L225 Difference]: With dead ends: 4697 [2023-11-12 02:22:57,657 INFO L226 Difference]: Without dead ends: 2357 [2023-11-12 02:22:57,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 924 GetRequests, 918 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:22:57,667 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 0 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 665 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:22:57,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 665 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:22:57,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2357 states. [2023-11-12 02:22:58,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2357 to 2357. [2023-11-12 02:22:58,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2357 states, 1604 states have (on average 1.5255610972568578) internal successors, (2447), 1610 states have internal predecessors, (2447), 722 states have call successors, (722), 30 states have call predecessors, (722), 30 states have return successors, (722), 716 states have call predecessors, (722), 722 states have call successors, (722) [2023-11-12 02:22:58,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2357 states to 2357 states and 3891 transitions. [2023-11-12 02:22:58,091 INFO L78 Accepts]: Start accepts. Automaton has 2357 states and 3891 transitions. Word has length 463 [2023-11-12 02:22:58,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:22:58,092 INFO L495 AbstractCegarLoop]: Abstraction has 2357 states and 3891 transitions. [2023-11-12 02:22:58,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-12 02:22:58,101 INFO L276 IsEmpty]: Start isEmpty. Operand 2357 states and 3891 transitions. [2023-11-12 02:22:58,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-12 02:22:58,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:22:58,107 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:22:58,120 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:22:58,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:58,314 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:22:58,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:22:58,315 INFO L85 PathProgramCache]: Analyzing trace with hash 540101299, now seen corresponding path program 1 times [2023-11-12 02:22:58,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:22:58,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060894953] [2023-11-12 02:22:58,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:58,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:22:58,374 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:22:58,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [570432165] [2023-11-12 02:22:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:22:58,375 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:22:58,375 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:22:58,376 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:22:58,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:22:58,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:22:58,753 INFO L262 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:22:58,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 7927 proven. 63 refuted. 0 times theorem prover too weak. 2522 trivial. 0 not checked. [2023-11-12 02:23:00,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 153 proven. 63 refuted. 0 times theorem prover too weak. 10296 trivial. 0 not checked. [2023-11-12 02:23:00,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:00,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060894953] [2023-11-12 02:23:00,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:00,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570432165] [2023-11-12 02:23:00,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570432165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:00,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:23:00,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2023-11-12 02:23:00,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4568096] [2023-11-12 02:23:00,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:00,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-12 02:23:00,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:00,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-12 02:23:00,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2023-11-12 02:23:00,783 INFO L87 Difference]: Start difference. First operand 2357 states and 3891 transitions. Second operand has 13 states, 13 states have (on average 12.615384615384615) internal successors, (164), 13 states have internal predecessors, (164), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-12 02:23:01,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:01,970 INFO L93 Difference]: Finished difference Result 4801 states and 7875 transitions. [2023-11-12 02:23:01,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 02:23:01,971 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.615384615384615) internal successors, (164), 13 states have internal predecessors, (164), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) Word has length 464 [2023-11-12 02:23:01,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:01,994 INFO L225 Difference]: With dead ends: 4801 [2023-11-12 02:23:01,995 INFO L226 Difference]: Without dead ends: 2447 [2023-11-12 02:23:02,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 931 GetRequests, 915 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:23:02,008 INFO L413 NwaCegarLoop]: 245 mSDtfsCounter, 721 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 746 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:02,009 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [772 Valid, 746 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-12 02:23:02,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2023-11-12 02:23:02,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2389. [2023-11-12 02:23:02,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 1628 states have (on average 1.5178132678132679) internal successors, (2471), 1634 states have internal predecessors, (2471), 722 states have call successors, (722), 38 states have call predecessors, (722), 38 states have return successors, (722), 716 states have call predecessors, (722), 722 states have call successors, (722) [2023-11-12 02:23:02,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 3915 transitions. [2023-11-12 02:23:02,468 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 3915 transitions. Word has length 464 [2023-11-12 02:23:02,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:02,469 INFO L495 AbstractCegarLoop]: Abstraction has 2389 states and 3915 transitions. [2023-11-12 02:23:02,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.615384615384615) internal successors, (164), 13 states have internal predecessors, (164), 6 states have call successors, (126), 4 states have call predecessors, (126), 6 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-12 02:23:02,469 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 3915 transitions. [2023-11-12 02:23:02,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-12 02:23:02,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:02,475 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:02,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:02,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:02,688 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:02,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:02,689 INFO L85 PathProgramCache]: Analyzing trace with hash -831705999, now seen corresponding path program 1 times [2023-11-12 02:23:02,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:02,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191169418] [2023-11-12 02:23:02,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:02,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:02,800 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:02,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398539357] [2023-11-12 02:23:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:02,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:02,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:02,809 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:02,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:23:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:03,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:23:03,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:04,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 8328 proven. 99 refuted. 0 times theorem prover too weak. 2085 trivial. 0 not checked. [2023-11-12 02:23:04,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 327 proven. 102 refuted. 0 times theorem prover too weak. 10083 trivial. 0 not checked. [2023-11-12 02:23:06,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:06,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191169418] [2023-11-12 02:23:06,169 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:06,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398539357] [2023-11-12 02:23:06,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398539357] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 02:23:06,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-12 02:23:06,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2023-11-12 02:23:06,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235168815] [2023-11-12 02:23:06,172 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-12 02:23:06,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-12 02:23:06,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:06,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-12 02:23:06,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=370, Unknown=0, NotChecked=0, Total=506 [2023-11-12 02:23:06,175 INFO L87 Difference]: Start difference. First operand 2389 states and 3915 transitions. Second operand has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 8 states have call successors, (126), 5 states have call predecessors, (126), 9 states have return successors, (126), 8 states have call predecessors, (126), 8 states have call successors, (126) [2023-11-12 02:23:09,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:09,705 INFO L93 Difference]: Finished difference Result 11323 states and 18445 transitions. [2023-11-12 02:23:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-12 02:23:09,706 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 8 states have call successors, (126), 5 states have call predecessors, (126), 9 states have return successors, (126), 8 states have call predecessors, (126), 8 states have call successors, (126) Word has length 464 [2023-11-12 02:23:09,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:09,783 INFO L225 Difference]: With dead ends: 11323 [2023-11-12 02:23:09,783 INFO L226 Difference]: Without dead ends: 8937 [2023-11-12 02:23:09,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 958 GetRequests, 909 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=830, Invalid=1720, Unknown=0, NotChecked=0, Total=2550 [2023-11-12 02:23:09,801 INFO L413 NwaCegarLoop]: 281 mSDtfsCounter, 2968 mSDsluCounter, 1199 mSDsCounter, 0 mSdLazyCounter, 1402 mSolverCounterSat, 1126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3035 SdHoareTripleChecker+Valid, 1480 SdHoareTripleChecker+Invalid, 2528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1126 IncrementalHoareTripleChecker+Valid, 1402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:09,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3035 Valid, 1480 Invalid, 2528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1126 Valid, 1402 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-12 02:23:09,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8937 states. [2023-11-12 02:23:10,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8937 to 3939. [2023-11-12 02:23:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3939 states, 2932 states have (on average 1.5661664392905865) internal successors, (4592), 2952 states have internal predecessors, (4592), 946 states have call successors, (946), 60 states have call predecessors, (946), 60 states have return successors, (946), 926 states have call predecessors, (946), 946 states have call successors, (946) [2023-11-12 02:23:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3939 states to 3939 states and 6484 transitions. [2023-11-12 02:23:10,467 INFO L78 Accepts]: Start accepts. Automaton has 3939 states and 6484 transitions. Word has length 464 [2023-11-12 02:23:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:10,468 INFO L495 AbstractCegarLoop]: Abstraction has 3939 states and 6484 transitions. [2023-11-12 02:23:10,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 7.782608695652174) internal successors, (179), 23 states have internal predecessors, (179), 8 states have call successors, (126), 5 states have call predecessors, (126), 9 states have return successors, (126), 8 states have call predecessors, (126), 8 states have call successors, (126) [2023-11-12 02:23:10,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3939 states and 6484 transitions. [2023-11-12 02:23:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-12 02:23:10,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:10,476 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:10,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:10,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:23:10,685 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:10,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:10,686 INFO L85 PathProgramCache]: Analyzing trace with hash -904092557, now seen corresponding path program 1 times [2023-11-12 02:23:10,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:10,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338055145] [2023-11-12 02:23:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:10,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:10,753 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:10,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [377740000] [2023-11-12 02:23:10,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:10,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:10,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:10,755 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:10,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:23:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:11,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:23:11,214 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:12,556 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 4822 proven. 150 refuted. 0 times theorem prover too weak. 5540 trivial. 0 not checked. [2023-11-12 02:23:12,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:23:13,744 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-12 02:23:13,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:13,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338055145] [2023-11-12 02:23:13,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:13,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377740000] [2023-11-12 02:23:13,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377740000] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:23:13,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:23:13,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2023-11-12 02:23:13,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982984547] [2023-11-12 02:23:13,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:13,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:23:13,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:13,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:23:13,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:23:13,748 INFO L87 Difference]: Start difference. First operand 3939 states and 6484 transitions. Second operand has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2023-11-12 02:23:14,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:14,808 INFO L93 Difference]: Finished difference Result 10923 states and 18076 transitions. [2023-11-12 02:23:14,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:23:14,809 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) Word has length 464 [2023-11-12 02:23:14,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:14,833 INFO L225 Difference]: With dead ends: 10923 [2023-11-12 02:23:14,833 INFO L226 Difference]: Without dead ends: 6987 [2023-11-12 02:23:14,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 928 GetRequests, 919 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:23:14,848 INFO L413 NwaCegarLoop]: 382 mSDtfsCounter, 613 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 613 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:14,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [613 Valid, 561 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:23:14,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6987 states. [2023-11-12 02:23:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6987 to 6971. [2023-11-12 02:23:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6971 states, 5460 states have (on average 1.594871794871795) internal successors, (8708), 5508 states have internal predecessors, (8708), 1422 states have call successors, (1422), 88 states have call predecessors, (1422), 88 states have return successors, (1422), 1374 states have call predecessors, (1422), 1422 states have call successors, (1422) [2023-11-12 02:23:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6971 states to 6971 states and 11552 transitions. [2023-11-12 02:23:15,806 INFO L78 Accepts]: Start accepts. Automaton has 6971 states and 11552 transitions. Word has length 464 [2023-11-12 02:23:15,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:15,807 INFO L495 AbstractCegarLoop]: Abstraction has 6971 states and 11552 transitions. [2023-11-12 02:23:15,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.4) internal successors, (102), 5 states have internal predecessors, (102), 3 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 3 states have call predecessors, (73), 3 states have call successors, (73) [2023-11-12 02:23:15,807 INFO L276 IsEmpty]: Start isEmpty. Operand 6971 states and 11552 transitions. [2023-11-12 02:23:15,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-12 02:23:15,819 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:15,820 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:15,828 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-12 02:23:16,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-12 02:23:16,029 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:16,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:16,029 INFO L85 PathProgramCache]: Analyzing trace with hash -842052943, now seen corresponding path program 1 times [2023-11-12 02:23:16,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:16,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76832242] [2023-11-12 02:23:16,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:16,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:16,083 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:16,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549549819] [2023-11-12 02:23:16,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:16,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:16,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:16,085 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:16,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:23:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:16,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 1113 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:23:16,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:17,155 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10512 trivial. 0 not checked. [2023-11-12 02:23:17,155 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:17,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:17,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76832242] [2023-11-12 02:23:17,156 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:17,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549549819] [2023-11-12 02:23:17,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549549819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:17,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:17,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:23:17,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939946442] [2023-11-12 02:23:17,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:17,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:23:17,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:17,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:23:17,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:17,159 INFO L87 Difference]: Start difference. First operand 6971 states and 11552 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-12 02:23:18,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:23:18,588 INFO L93 Difference]: Finished difference Result 18827 states and 31182 transitions. [2023-11-12 02:23:18,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:23:18,589 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) Word has length 464 [2023-11-12 02:23:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:23:18,630 INFO L225 Difference]: With dead ends: 18827 [2023-11-12 02:23:18,630 INFO L226 Difference]: Without dead ends: 11859 [2023-11-12 02:23:18,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 461 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:23:18,652 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 490 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 490 SdHoareTripleChecker+Valid, 845 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:23:18,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [490 Valid, 845 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:23:18,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11859 states. [2023-11-12 02:23:20,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11859 to 10209. [2023-11-12 02:23:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10209 states, 7636 states have (on average 1.5447878470403353) internal successors, (11796), 7712 states have internal predecessors, (11796), 2396 states have call successors, (2396), 176 states have call predecessors, (2396), 176 states have return successors, (2396), 2320 states have call predecessors, (2396), 2396 states have call successors, (2396) [2023-11-12 02:23:20,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10209 states to 10209 states and 16588 transitions. [2023-11-12 02:23:20,533 INFO L78 Accepts]: Start accepts. Automaton has 10209 states and 16588 transitions. Word has length 464 [2023-11-12 02:23:20,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:23:20,534 INFO L495 AbstractCegarLoop]: Abstraction has 10209 states and 16588 transitions. [2023-11-12 02:23:20,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 3 states have internal predecessors, (102), 1 states have call successors, (73), 1 states have call predecessors, (73), 1 states have return successors, (73), 1 states have call predecessors, (73), 1 states have call successors, (73) [2023-11-12 02:23:20,534 INFO L276 IsEmpty]: Start isEmpty. Operand 10209 states and 16588 transitions. [2023-11-12 02:23:20,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2023-11-12 02:23:20,547 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:23:20,547 INFO L195 NwaCegarLoop]: trace histogram [73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:23:20,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:23:20,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-12 02:23:20,757 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:23:20,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:23:20,757 INFO L85 PathProgramCache]: Analyzing trace with hash 676490212, now seen corresponding path program 1 times [2023-11-12 02:23:20,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:23:20,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602244446] [2023-11-12 02:23:20,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:20,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:23:20,834 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:23:20,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [940767646] [2023-11-12 02:23:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:23:20,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:23:20,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:23:20,835 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:23:20,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3888a9d2-6286-4ae9-8aca-a41f38cf35ec/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:23:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:23:21,309 INFO L262 TraceCheckSpWp]: Trace formula consists of 1111 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-12 02:23:21,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:23:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10512 backedges. 3960 proven. 0 refuted. 0 times theorem prover too weak. 6552 trivial. 0 not checked. [2023-11-12 02:23:21,944 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:23:21,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:23:21,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602244446] [2023-11-12 02:23:21,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:23:21,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940767646] [2023-11-12 02:23:21,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940767646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:23:21,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:23:21,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:23:21,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192290676] [2023-11-12 02:23:21,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:23:21,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:23:21,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:23:21,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:23:21,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:23:21,949 INFO L87 Difference]: Start difference. First operand 10209 states and 16588 transitions. Second operand has 8 states, 8 states have (on average 13.125) internal successors, (105), 8 states have internal predecessors, (105), 2 states have call successors, (73), 2 states have call predecessors, (73), 2 states have return successors, (73), 2 states have call predecessors, (73), 2 states have call successors, (73)