./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc 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_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi/config/KojakMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b05b18c0458ef705f828769f88cc2a590589ce4d5c3f0e48f99be90a949f7ed4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 22:53:38,155 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 22:53:38,224 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf [2023-11-24 22:53:38,229 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 22:53:38,230 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2023-11-24 22:53:38,266 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 22:53:38,267 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 22:53:38,272 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 22:53:38,273 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 22:53:38,278 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 22:53:38,279 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 22:53:38,280 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 22:53:38,280 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 22:53:38,282 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-24 22:53:38,282 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-24 22:53:38,283 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-24 22:53:38,283 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 22:53:38,284 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-24 22:53:38,284 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 22:53:38,285 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 22:53:38,285 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2023-11-24 22:53:38,286 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2023-11-24 22:53:38,286 INFO L153 SettingsManager]: * Theory for external solver=ALL [2023-11-24 22:53:38,287 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 22:53:38,287 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-24 22:53:38,288 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 22:53:38,288 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 22:53:38,289 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2023-11-24 22:53:38,289 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 22:53:38,290 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_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b05b18c0458ef705f828769f88cc2a590589ce4d5c3f0e48f99be90a949f7ed4 [2023-11-24 22:53:38,631 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 22:53:38,665 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 22:53:38,668 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 22:53:38,670 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 22:53:38,671 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 22:53:38,672 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi/../../sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i [2023-11-24 22:53:41,803 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 22:53:42,115 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 22:53:42,116 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/sv-benchmarks/c/forester-heap/sll-rb-sentinel-1.i [2023-11-24 22:53:42,138 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi/data/cc4595030/f0b69886310e4f2585c8616ca166f647/FLAG404c5bb79 [2023-11-24 22:53:42,153 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi/data/cc4595030/f0b69886310e4f2585c8616ca166f647 [2023-11-24 22:53:42,156 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 22:53:42,158 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 22:53:42,159 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 22:53:42,159 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 22:53:42,164 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 22:53:42,167 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:53:42" (1/1) ... [2023-11-24 22:53:42,168 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fac55f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:53:42, skipping insertion in model container [2023-11-24 22:53:42,168 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 10:53:42" (1/1) ... [2023-11-24 22:53:42,236 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 22:53:42,617 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:53:42,633 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 22:53:42,678 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 22:53:42,712 INFO L206 MainTranslator]: Completed translation [2023-11-24 22:53:42,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:53:42 WrapperNode [2023-11-24 22:53:42,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 22:53:42,714 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 22:53:42,714 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 22:53:42,714 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 22:53:42,722 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:53:42" (1/1) ... [2023-11-24 22:53:42,737 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:53:42" (1/1) ... [2023-11-24 22:53:42,769 INFO L138 Inliner]: procedures = 119, calls = 40, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 147 [2023-11-24 22:53:42,769 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 22:53:42,770 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 22:53:42,771 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 22:53:42,771 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 22:53:42,781 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:53:42" (1/1) ... [2023-11-24 22:53:42,782 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:53:42" (1/1) ... [2023-11-24 22:53:42,792 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:53:42" (1/1) ... [2023-11-24 22:53:42,793 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:53:42" (1/1) ... [2023-11-24 22:53:42,807 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:53:42" (1/1) ... [2023-11-24 22:53:42,814 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:53:42" (1/1) ... [2023-11-24 22:53:42,817 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:53:42" (1/1) ... [2023-11-24 22:53:42,824 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:53:42" (1/1) ... [2023-11-24 22:53:42,830 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 22:53:42,831 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 22:53:42,831 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 22:53:42,831 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 22:53:42,832 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 10:53:42" (1/1) ... [2023-11-24 22:53:42,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-24 22:53:42,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi/z3 [2023-11-24 22:53:42,878 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2023-11-24 22:53:42,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cc8fcbac-3518-4922-8d02-11610ff0b2cc/bin/ukojak-verify-afCqCEvfdi/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2023-11-24 22:53:42,921 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-24 22:53:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-24 22:53:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-24 22:53:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 22:53:42,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-24 22:53:42,923 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-24 22:53:42,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-24 22:53:42,923 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-24 22:53:42,923 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 22:53:42,924 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 22:53:43,048 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 22:53:43,050 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 22:53:43,476 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 22:53:43,567 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 22:53:43,567 INFO L309 CfgBuilder]: Removed 11 assume(true) statements. [2023-11-24 22:53:43,571 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:53:43 BoogieIcfgContainer [2023-11-24 22:53:43,572 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 22:53:43,573 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2023-11-24 22:53:43,573 INFO L270 PluginConnector]: Initializing CodeCheck... [2023-11-24 22:53:43,596 INFO L274 PluginConnector]: CodeCheck initialized [2023-11-24 22:53:43,596 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 10:53:43" (1/1) ... [2023-11-24 22:53:43,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 22:53:43,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:43,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 126 states and 148 transitions. [2023-11-24 22:53:43,667 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 148 transitions. [2023-11-24 22:53:43,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-24 22:53:43,671 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:43,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:43,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 125 states and 147 transitions. [2023-11-24 22:53:43,938 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 147 transitions. [2023-11-24 22:53:43,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-24 22:53:43,939 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:43,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:43,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:44,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 124 states and 146 transitions. [2023-11-24 22:53:44,123 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 146 transitions. [2023-11-24 22:53:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 22:53:44,124 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:44,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:44,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:44,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:44,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 123 states and 145 transitions. [2023-11-24 22:53:44,213 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 145 transitions. [2023-11-24 22:53:44,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-24 22:53:44,213 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:44,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:44,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:44,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:44,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 122 states and 144 transitions. [2023-11-24 22:53:44,490 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2023-11-24 22:53:44,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 22:53:44,491 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:44,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:44,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:44,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:44,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:44,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 121 states and 143 transitions. [2023-11-24 22:53:44,715 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2023-11-24 22:53:44,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-24 22:53:44,716 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:44,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:44,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:44,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:45,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 120 states and 142 transitions. [2023-11-24 22:53:45,006 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 142 transitions. [2023-11-24 22:53:45,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 22:53:45,007 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:45,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:45,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:45,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:45,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 119 states and 141 transitions. [2023-11-24 22:53:45,107 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 141 transitions. [2023-11-24 22:53:45,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-24 22:53:45,108 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:45,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:45,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:45,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:45,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:45,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 118 states and 140 transitions. [2023-11-24 22:53:45,518 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 140 transitions. [2023-11-24 22:53:45,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 22:53:45,520 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:45,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:45,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:45,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 117 states and 138 transitions. [2023-11-24 22:53:45,798 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2023-11-24 22:53:45,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 22:53:45,799 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:45,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:46,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:46,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 120 states and 144 transitions. [2023-11-24 22:53:46,318 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2023-11-24 22:53:46,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 22:53:46,319 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:46,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:46,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:46,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 119 states and 143 transitions. [2023-11-24 22:53:46,400 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 143 transitions. [2023-11-24 22:53:46,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-24 22:53:46,400 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:46,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:46,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 120 states and 145 transitions. [2023-11-24 22:53:46,833 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 145 transitions. [2023-11-24 22:53:46,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 22:53:46,833 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:46,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:46,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 120 states and 141 transitions. [2023-11-24 22:53:46,877 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 141 transitions. [2023-11-24 22:53:46,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 22:53:46,879 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:46,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:47,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:47,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 122 states and 145 transitions. [2023-11-24 22:53:47,538 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 145 transitions. [2023-11-24 22:53:47,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-24 22:53:47,539 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:47,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:48,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:48,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 124 states and 149 transitions. [2023-11-24 22:53:48,430 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 149 transitions. [2023-11-24 22:53:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 22:53:48,431 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:48,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:48,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:48,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 130 states and 159 transitions. [2023-11-24 22:53:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 159 transitions. [2023-11-24 22:53:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 22:53:48,710 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:48,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:48,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:49,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 136 states and 170 transitions. [2023-11-24 22:53:49,464 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 170 transitions. [2023-11-24 22:53:49,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 22:53:49,465 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:49,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:49,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:49,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:50,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:50,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 139 states and 176 transitions. [2023-11-24 22:53:50,906 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 176 transitions. [2023-11-24 22:53:50,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 22:53:50,907 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:50,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:50,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:51,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 138 states and 175 transitions. [2023-11-24 22:53:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 175 transitions. [2023-11-24 22:53:51,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 22:53:51,021 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:51,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:51,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:51,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:51,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 140 states and 179 transitions. [2023-11-24 22:53:51,613 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 179 transitions. [2023-11-24 22:53:51,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 22:53:51,613 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:51,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:51,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:51,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:51,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 139 states and 178 transitions. [2023-11-24 22:53:51,680 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 178 transitions. [2023-11-24 22:53:51,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 22:53:51,682 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:51,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:51,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 141 states and 181 transitions. [2023-11-24 22:53:52,112 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 181 transitions. [2023-11-24 22:53:52,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 22:53:52,112 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:52,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:52,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:52,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 140 states and 180 transitions. [2023-11-24 22:53:52,205 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 180 transitions. [2023-11-24 22:53:52,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 22:53:52,206 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:52,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:52,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:52,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:53,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:53,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 141 states and 182 transitions. [2023-11-24 22:53:53,158 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 182 transitions. [2023-11-24 22:53:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 22:53:53,159 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:53,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:56,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 147 states and 192 transitions. [2023-11-24 22:53:56,204 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 192 transitions. [2023-11-24 22:53:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 22:53:56,205 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:56,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:56,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:56,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:56,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 146 states and 191 transitions. [2023-11-24 22:53:56,279 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 191 transitions. [2023-11-24 22:53:56,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-24 22:53:56,280 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:56,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:56,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 145 states and 190 transitions. [2023-11-24 22:53:57,063 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 190 transitions. [2023-11-24 22:53:57,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 22:53:57,063 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:57,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:57,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:57,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 147 states and 194 transitions. [2023-11-24 22:53:57,429 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 194 transitions. [2023-11-24 22:53:57,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 22:53:57,430 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:57,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:57,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:57,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:57,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 151 states and 200 transitions. [2023-11-24 22:53:57,866 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 200 transitions. [2023-11-24 22:53:57,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 22:53:57,867 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:57,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:57,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:58,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:58,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 152 states and 200 transitions. [2023-11-24 22:53:58,671 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 200 transitions. [2023-11-24 22:53:58,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 22:53:58,672 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:58,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:53:58,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:53:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:53:59,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 154 states and 203 transitions. [2023-11-24 22:53:59,803 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 203 transitions. [2023-11-24 22:53:59,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-24 22:53:59,803 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:53:59,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:53:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:00,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:54:01,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:01,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 156 states and 206 transitions. [2023-11-24 22:54:01,174 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 206 transitions. [2023-11-24 22:54:01,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 22:54:01,175 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:01,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:01,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:54:02,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:02,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 161 states and 212 transitions. [2023-11-24 22:54:02,510 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 212 transitions. [2023-11-24 22:54:02,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 22:54:02,511 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:02,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:02,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:54:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 133 states and 167 transitions. [2023-11-24 22:54:02,749 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2023-11-24 22:54:02,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-24 22:54:02,750 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:02,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:02,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:54:02,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:02,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 132 states and 166 transitions. [2023-11-24 22:54:02,980 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 166 transitions. [2023-11-24 22:54:02,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 22:54:02,980 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:02,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:03,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:54:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 133 states and 167 transitions. [2023-11-24 22:54:03,043 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 167 transitions. [2023-11-24 22:54:03,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 22:54:03,045 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:03,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:03,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:54:03,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:03,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 135 states and 174 transitions. [2023-11-24 22:54:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 174 transitions. [2023-11-24 22:54:03,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 22:54:03,193 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:03,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:03,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:03,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:54:04,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:04,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 138 states and 180 transitions. [2023-11-24 22:54:04,809 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 180 transitions. [2023-11-24 22:54:04,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 22:54:04,809 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:04,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:04,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:05,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:54:07,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:07,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 145 states and 197 transitions. [2023-11-24 22:54:07,731 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 197 transitions. [2023-11-24 22:54:07,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 22:54:07,731 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:07,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:07,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:54:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 148 states and 201 transitions. [2023-11-24 22:54:08,826 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 201 transitions. [2023-11-24 22:54:08,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 22:54:08,827 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:08,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:08,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:08,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-24 22:54:10,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:10,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 153 states and 207 transitions. [2023-11-24 22:54:10,531 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 207 transitions. [2023-11-24 22:54:10,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 22:54:10,532 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:10,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:10,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:54:17,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:17,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 166 states and 233 transitions. [2023-11-24 22:54:17,938 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 233 transitions. [2023-11-24 22:54:17,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 22:54:17,938 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:17,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 22:54:18,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:18,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 167 states and 234 transitions. [2023-11-24 22:54:18,478 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 234 transitions. [2023-11-24 22:54:18,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 22:54:18,479 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:18,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:18,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:18,513 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:54:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:22,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 178 states and 263 transitions. [2023-11-24 22:54:22,984 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 263 transitions. [2023-11-24 22:54:22,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 22:54:22,984 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:22,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:23,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:54:28,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:28,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 189 states and 291 transitions. [2023-11-24 22:54:28,029 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 291 transitions. [2023-11-24 22:54:28,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 22:54:28,030 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:28,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 22:54:28,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-24 22:54:28,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 190 states and 292 transitions. [2023-11-24 22:54:28,546 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 292 transitions. [2023-11-24 22:54:28,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 22:54:28,547 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-24 22:54:28,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 22:54:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 22:54:28,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked.