./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/busybox-1.22.0/whoami-incomplete-2.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL/config/KojakReach.xml -i ../../sv-benchmarks/c/busybox-1.22.0/whoami-incomplete-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL/config/svcomp-Overflow-64bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 73081b3fa7e8ac6772d35cbb49ddbf2b46d162637b371c81319141218fe98c6a --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 02:49:57,393 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 02:49:57,479 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL/config/svcomp-Overflow-64bit-Kojak_Default.epf [2023-11-19 02:49:57,484 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 02:49:57,485 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2023-11-19 02:49:57,511 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 02:49:57,513 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 02:49:57,513 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2023-11-19 02:49:57,514 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 02:49:57,515 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 02:49:57,516 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 02:49:57,517 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 02:49:57,517 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 02:49:57,518 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 02:49:57,519 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 02:49:57,519 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 02:49:57,520 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 02:49:57,521 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 02:49:57,521 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 02:49:57,522 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 02:49:57,523 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 02:49:57,524 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2023-11-19 02:49:57,524 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2023-11-19 02:49:57,525 INFO L153 SettingsManager]: * Theory for external solver=ALL [2023-11-19 02:49:57,526 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 02:49:57,526 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-19 02:49:57,527 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 02:49:57,528 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 02:49:57,529 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 02:49:57,529 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2023-11-19 02:49:57,530 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 02:49:57,530 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 02:49:57,531 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73081b3fa7e8ac6772d35cbb49ddbf2b46d162637b371c81319141218fe98c6a [2023-11-19 02:49:57,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 02:49:57,793 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 02:49:57,796 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 02:49:57,797 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 02:49:57,798 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 02:49:57,799 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL/../../sv-benchmarks/c/busybox-1.22.0/whoami-incomplete-2.i [2023-11-19 02:50:00,947 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 02:50:01,586 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 02:50:01,587 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/sv-benchmarks/c/busybox-1.22.0/whoami-incomplete-2.i [2023-11-19 02:50:01,618 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL/data/cf806d9c8/6e79eb987a434f3bb7e96e739e499133/FLAG53bba4a8b [2023-11-19 02:50:01,637 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL/data/cf806d9c8/6e79eb987a434f3bb7e96e739e499133 [2023-11-19 02:50:01,640 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 02:50:01,642 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 02:50:01,644 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 02:50:01,644 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 02:50:01,650 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 02:50:01,651 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:01" (1/1) ... [2023-11-19 02:50:01,652 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@59d5ddb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:01, skipping insertion in model container [2023-11-19 02:50:01,653 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:50:01" (1/1) ... [2023-11-19 02:50:01,745 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 02:50:03,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 02:50:03,303 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 02:50:03,466 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 02:50:03,724 WARN L675 CHandler]: The function fflush is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 02:50:03,724 WARN L675 CHandler]: The function puts is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 02:50:03,733 INFO L206 MainTranslator]: Completed translation [2023-11-19 02:50:03,734 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:03 WrapperNode [2023-11-19 02:50:03,734 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 02:50:03,736 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 02:50:03,736 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 02:50:03,736 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 02:50:03,746 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:03" (1/1) ... [2023-11-19 02:50:03,819 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:03" (1/1) ... [2023-11-19 02:50:03,901 INFO L138 Inliner]: procedures = 613, calls = 174, calls flagged for inlining = 19, calls inlined = 17, statements flattened = 536 [2023-11-19 02:50:03,910 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 02:50:03,911 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 02:50:03,911 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 02:50:03,911 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 02:50:03,921 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:03" (1/1) ... [2023-11-19 02:50:03,922 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:03" (1/1) ... [2023-11-19 02:50:03,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:03" (1/1) ... [2023-11-19 02:50:03,954 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:03" (1/1) ... [2023-11-19 02:50:03,995 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:03" (1/1) ... [2023-11-19 02:50:04,009 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:03" (1/1) ... [2023-11-19 02:50:04,019 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:03" (1/1) ... [2023-11-19 02:50:04,040 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:03" (1/1) ... [2023-11-19 02:50:04,058 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 02:50:04,059 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 02:50:04,059 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 02:50:04,059 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 02:50:04,060 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:50:03" (1/1) ... [2023-11-19 02:50:04,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-19 02:50:04,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL/z3 [2023-11-19 02:50:04,094 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2023-11-19 02:50:04,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_167ded0e-1ce8-4db3-a154-beb9092ba3e7/bin/ukojak-verify-G8NBE6pJGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2023-11-19 02:50:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 02:50:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2023-11-19 02:50:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2023-11-19 02:50:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 02:50:04,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 02:50:04,146 INFO L130 BoogieDeclarations]: Found specification of procedure fflush [2023-11-19 02:50:04,146 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 02:50:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 02:50:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 02:50:04,148 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 02:50:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_strcpy [2023-11-19 02:50:04,148 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_strcpy [2023-11-19 02:50:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2023-11-19 02:50:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2023-11-19 02:50:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 02:50:04,149 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 02:50:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 02:50:04,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 02:50:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure fflush_all [2023-11-19 02:50:04,150 INFO L138 BoogieDeclarations]: Found implementation of procedure fflush_all [2023-11-19 02:50:04,150 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-19 02:50:04,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 02:50:04,152 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2023-11-19 02:50:04,152 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 02:50:04,588 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 02:50:04,590 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 02:50:05,345 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 02:50:05,537 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 02:50:05,537 INFO L302 CfgBuilder]: Removed 9 assume(true) statements. [2023-11-19 02:50:05,544 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:50:05 BoogieIcfgContainer [2023-11-19 02:50:05,545 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 02:50:05,548 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2023-11-19 02:50:05,548 INFO L270 PluginConnector]: Initializing CodeCheck... [2023-11-19 02:50:05,558 INFO L274 PluginConnector]: CodeCheck initialized [2023-11-19 02:50:05,559 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:50:05" (1/1) ... [2023-11-19 02:50:05,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 02:50:05,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:05,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 124 states and 154 transitions. [2023-11-19 02:50:05,648 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 154 transitions. [2023-11-19 02:50:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 02:50:05,649 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:05,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:05,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:06,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 02:50:06,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 126 states and 157 transitions. [2023-11-19 02:50:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 157 transitions. [2023-11-19 02:50:06,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 02:50:06,186 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:06,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:06,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 02:50:06,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:06,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 127 states and 158 transitions. [2023-11-19 02:50:06,435 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 158 transitions. [2023-11-19 02:50:06,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-19 02:50:06,436 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:06,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 02:50:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 129 states and 161 transitions. [2023-11-19 02:50:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 161 transitions. [2023-11-19 02:50:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 02:50:06,741 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:06,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:06,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 02:50:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:07,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 128 states and 160 transitions. [2023-11-19 02:50:07,027 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 160 transitions. [2023-11-19 02:50:07,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 02:50:07,028 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:07,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 02:50:07,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:07,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 129 states and 161 transitions. [2023-11-19 02:50:07,315 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 161 transitions. [2023-11-19 02:50:07,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 02:50:07,315 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:07,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:07,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:07,502 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 02:50:07,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:07,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 128 states and 160 transitions. [2023-11-19 02:50:07,665 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 160 transitions. [2023-11-19 02:50:07,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-19 02:50:07,665 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:07,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:07,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:07,810 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 02:50:07,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:07,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 127 states and 159 transitions. [2023-11-19 02:50:07,859 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 159 transitions. [2023-11-19 02:50:07,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 02:50:07,860 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:07,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:08,042 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 02:50:08,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:08,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 130 states and 162 transitions. [2023-11-19 02:50:08,274 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 162 transitions. [2023-11-19 02:50:08,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 02:50:08,275 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:08,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:08,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:08,568 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 02:50:08,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:08,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 133 states and 165 transitions. [2023-11-19 02:50:08,735 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 165 transitions. [2023-11-19 02:50:08,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 02:50:08,736 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:08,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:08,961 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 02:50:09,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:09,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 136 states and 168 transitions. [2023-11-19 02:50:09,179 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 168 transitions. [2023-11-19 02:50:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-19 02:50:09,180 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:09,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:09,447 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 02:50:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 139 states and 171 transitions. [2023-11-19 02:50:09,656 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 171 transitions. [2023-11-19 02:50:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 02:50:09,657 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:09,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:09,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 02:50:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:10,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 142 states and 174 transitions. [2023-11-19 02:50:10,204 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 174 transitions. [2023-11-19 02:50:10,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 02:50:10,205 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:10,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:10,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 02:50:10,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:10,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 145 states and 177 transitions. [2023-11-19 02:50:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 177 transitions. [2023-11-19 02:50:10,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 02:50:10,835 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:10,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:10,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:11,214 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 02:50:11,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 148 states and 180 transitions. [2023-11-19 02:50:11,455 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 180 transitions. [2023-11-19 02:50:11,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 02:50:11,456 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:11,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:11,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:11,853 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 02:50:12,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:12,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 151 states and 182 transitions. [2023-11-19 02:50:12,017 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 182 transitions. [2023-11-19 02:50:12,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-19 02:50:12,019 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:12,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:12,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:12,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:12,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 150 states and 181 transitions. [2023-11-19 02:50:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 181 transitions. [2023-11-19 02:50:12,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-19 02:50:12,576 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:12,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:12,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:12,777 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:12,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 149 states and 180 transitions. [2023-11-19 02:50:12,812 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 180 transitions. [2023-11-19 02:50:12,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-19 02:50:12,813 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:12,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:12,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:13,024 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:13,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:13,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 148 states and 179 transitions. [2023-11-19 02:50:13,156 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 179 transitions. [2023-11-19 02:50:13,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-19 02:50:13,157 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:13,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:13,408 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:13,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:13,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 150 states and 182 transitions. [2023-11-19 02:50:13,624 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 182 transitions. [2023-11-19 02:50:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-19 02:50:13,624 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:13,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:13,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:13,886 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:13,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:13,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 151 states and 183 transitions. [2023-11-19 02:50:13,909 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 183 transitions. [2023-11-19 02:50:13,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 02:50:13,910 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:13,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:13,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:14,151 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:14,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:14,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 153 states and 186 transitions. [2023-11-19 02:50:14,297 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 186 transitions. [2023-11-19 02:50:14,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-19 02:50:14,297 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:14,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:14,503 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-11-19 02:50:15,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:15,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 159 states and 197 transitions. [2023-11-19 02:50:15,128 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 197 transitions. [2023-11-19 02:50:15,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 02:50:15,128 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:15,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-11-19 02:50:15,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:15,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 158 states and 196 transitions. [2023-11-19 02:50:15,581 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 196 transitions. [2023-11-19 02:50:15,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2023-11-19 02:50:15,582 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:15,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:15,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:15,754 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2023-11-19 02:50:15,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:15,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 159 states and 197 transitions. [2023-11-19 02:50:15,782 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 197 transitions. [2023-11-19 02:50:15,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 02:50:15,786 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:15,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:16,089 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:16,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:16,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 161 states and 200 transitions. [2023-11-19 02:50:16,178 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 200 transitions. [2023-11-19 02:50:16,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 02:50:16,179 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:16,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:16,353 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:16,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:16,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 162 states and 201 transitions. [2023-11-19 02:50:16,375 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 201 transitions. [2023-11-19 02:50:16,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 02:50:16,376 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:16,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:16,717 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-19 02:50:17,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 161 states and 200 transitions. [2023-11-19 02:50:17,119 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 200 transitions. [2023-11-19 02:50:17,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2023-11-19 02:50:17,120 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:17,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:17,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:17,341 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-19 02:50:17,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:17,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 163 states and 203 transitions. [2023-11-19 02:50:17,808 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 203 transitions. [2023-11-19 02:50:17,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 02:50:17,808 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:17,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:17,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 205 states and 254 transitions. [2023-11-19 02:50:23,522 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 254 transitions. [2023-11-19 02:50:23,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 02:50:23,523 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:23,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:24,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 207 states and 258 transitions. [2023-11-19 02:50:24,199 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 258 transitions. [2023-11-19 02:50:24,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 02:50:24,200 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:24,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:24,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:25,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:25,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 209 states and 261 transitions. [2023-11-19 02:50:25,054 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 261 transitions. [2023-11-19 02:50:25,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2023-11-19 02:50:25,055 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:25,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:25,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:25,361 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:25,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:25,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 212 states and 267 transitions. [2023-11-19 02:50:25,499 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 267 transitions. [2023-11-19 02:50:25,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-19 02:50:25,500 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:25,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:25,857 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:26,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:26,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 215 states and 271 transitions. [2023-11-19 02:50:26,424 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 271 transitions. [2023-11-19 02:50:26,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 02:50:26,425 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:26,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:26,662 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:26,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:26,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 216 states and 272 transitions. [2023-11-19 02:50:26,692 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 272 transitions. [2023-11-19 02:50:26,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-19 02:50:26,693 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:26,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:26,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2023-11-19 02:50:27,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:27,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 218 states and 273 transitions. [2023-11-19 02:50:27,366 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 273 transitions. [2023-11-19 02:50:27,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2023-11-19 02:50:27,368 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:27,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-19 02:50:28,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:28,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 219 states and 274 transitions. [2023-11-19 02:50:28,249 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 274 transitions. [2023-11-19 02:50:28,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-19 02:50:28,250 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:28,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:28,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:28,693 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2023-11-19 02:50:29,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:29,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 218 states and 273 transitions. [2023-11-19 02:50:29,474 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 273 transitions. [2023-11-19 02:50:29,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-19 02:50:29,475 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:29,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:29,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 218 states and 272 transitions. [2023-11-19 02:50:29,610 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 272 transitions. [2023-11-19 02:50:29,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 02:50:29,611 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:29,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:29,942 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2023-11-19 02:50:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:32,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 232 states and 298 transitions. [2023-11-19 02:50:32,790 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 298 transitions. [2023-11-19 02:50:32,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 02:50:32,791 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:32,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:32,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:33,365 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:33,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:33,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 231 states and 297 transitions. [2023-11-19 02:50:33,524 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 297 transitions. [2023-11-19 02:50:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-19 02:50:33,525 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:33,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:33,920 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:34,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:34,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 234 states and 303 transitions. [2023-11-19 02:50:34,317 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 303 transitions. [2023-11-19 02:50:34,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-19 02:50:34,318 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:34,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:35,252 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2023-11-19 02:50:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:37,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 235 states and 305 transitions. [2023-11-19 02:50:37,356 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 305 transitions. [2023-11-19 02:50:37,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-19 02:50:37,358 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:37,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 11 proven. 1 refuted. 0 times theorem prover too weak. 151 trivial. 0 not checked. [2023-11-19 02:50:38,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:38,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 236 states and 306 transitions. [2023-11-19 02:50:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 306 transitions. [2023-11-19 02:50:38,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-19 02:50:38,087 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:38,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:38,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 181 trivial. 0 not checked. [2023-11-19 02:50:39,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 02:50:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 238 states and 310 transitions. [2023-11-19 02:50:39,297 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 310 transitions. [2023-11-19 02:50:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-19 02:50:39,299 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 02:50:39,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 02:50:39,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 02:50:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked.