./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/bin/ukojak-verify-G8NBE6pJGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/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_2e40c789-905f-4b54-a56b-50f72d600a6d/bin/ukojak-verify-G8NBE6pJGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/bin/ukojak-verify-G8NBE6pJGL/config/KojakMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/bin/ukojak-verify-G8NBE6pJGL/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/bin/ukojak-verify-G8NBE6pJGL --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 2f8161fc7f730bddeac54a8f174c52e5ef9cd819e9497e3a4087e68b96d46105 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:03:33,283 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:03:33,372 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/bin/ukojak-verify-G8NBE6pJGL/config/svcomp-DerefFreeMemtrack-32bit-Kojak_Default.epf [2023-11-19 04:03:33,378 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:03:33,379 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2023-11-19 04:03:33,407 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:03:33,409 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 04:03:33,410 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 04:03:33,410 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:03:33,411 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:03:33,412 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:03:33,413 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:03:33,413 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:03:33,414 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-19 04:03:33,415 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-19 04:03:33,415 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-19 04:03:33,416 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:03:33,417 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:03:33,417 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:03:33,418 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:03:33,419 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2023-11-19 04:03:33,419 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2023-11-19 04:03:33,420 INFO L153 SettingsManager]: * Theory for external solver=ALL [2023-11-19 04:03:33,421 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:03:33,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-19 04:03:33,422 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:03:33,423 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:03:33,423 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2023-11-19 04:03:33,424 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:03:33,424 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_2e40c789-905f-4b54-a56b-50f72d600a6d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/bin/ukojak-verify-G8NBE6pJGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2f8161fc7f730bddeac54a8f174c52e5ef9cd819e9497e3a4087e68b96d46105 [2023-11-19 04:03:33,827 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:03:33,869 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:03:33,872 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:03:33,875 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:03:33,876 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:03:33,878 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/bin/ukojak-verify-G8NBE6pJGL/../../sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i [2023-11-19 04:03:37,621 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:03:38,019 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:03:38,020 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/sv-benchmarks/c/forester-heap/dll-rb-cnstr_1-1.i [2023-11-19 04:03:38,043 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/bin/ukojak-verify-G8NBE6pJGL/data/0043e90ab/371e27d8ee134561ba2b944df68f5e4b/FLAG2b7523ef9 [2023-11-19 04:03:38,060 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/bin/ukojak-verify-G8NBE6pJGL/data/0043e90ab/371e27d8ee134561ba2b944df68f5e4b [2023-11-19 04:03:38,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:03:38,072 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:03:38,074 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:03:38,074 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:03:38,080 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:03:38,081 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:03:38" (1/1) ... [2023-11-19 04:03:38,083 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b23d035 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:38, skipping insertion in model container [2023-11-19 04:03:38,083 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:03:38" (1/1) ... [2023-11-19 04:03:38,149 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:03:38,478 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:03:38,489 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:03:38,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:03:38,578 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:03:38,579 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:38 WrapperNode [2023-11-19 04:03:38,579 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:03:38,581 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:03:38,581 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:03:38,581 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:03:38,590 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:38" (1/1) ... [2023-11-19 04:03:38,608 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:38" (1/1) ... [2023-11-19 04:03:38,643 INFO L138 Inliner]: procedures = 119, calls = 46, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 181 [2023-11-19 04:03:38,644 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:03:38,645 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:03:38,645 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:03:38,645 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:03:38,659 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:38" (1/1) ... [2023-11-19 04:03:38,660 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:38" (1/1) ... [2023-11-19 04:03:38,672 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:38" (1/1) ... [2023-11-19 04:03:38,674 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:38" (1/1) ... [2023-11-19 04:03:38,697 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:38" (1/1) ... [2023-11-19 04:03:38,710 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:38" (1/1) ... [2023-11-19 04:03:38,715 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:38" (1/1) ... [2023-11-19 04:03:38,724 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:38" (1/1) ... [2023-11-19 04:03:38,728 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:03:38,732 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:03:38,733 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:03:38,734 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:03:38,735 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:38" (1/1) ... [2023-11-19 04:03:38,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-19 04:03:38,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/bin/ukojak-verify-G8NBE6pJGL/z3 [2023-11-19 04:03:38,777 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/bin/ukojak-verify-G8NBE6pJGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2023-11-19 04:03:38,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2e40c789-905f-4b54-a56b-50f72d600a6d/bin/ukojak-verify-G8NBE6pJGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2023-11-19 04:03:38,832 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 04:03:38,832 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 04:03:38,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-19 04:03:38,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:03:38,833 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2023-11-19 04:03:38,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-19 04:03:38,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 04:03:38,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:03:38,834 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:03:38,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:03:38,972 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:03:38,975 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:03:39,514 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:03:39,600 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:03:39,600 INFO L302 CfgBuilder]: Removed 17 assume(true) statements. [2023-11-19 04:03:39,607 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:03:39 BoogieIcfgContainer [2023-11-19 04:03:39,608 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:03:39,609 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2023-11-19 04:03:39,609 INFO L270 PluginConnector]: Initializing CodeCheck... [2023-11-19 04:03:39,630 INFO L274 PluginConnector]: CodeCheck initialized [2023-11-19 04:03:39,631 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:03:39" (1/1) ... [2023-11-19 04:03:39,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:03:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 153 states and 187 transitions. [2023-11-19 04:03:39,709 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 187 transitions. [2023-11-19 04:03:39,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-19 04:03:39,712 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:39,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:39,963 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 04:03:40,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 152 states and 186 transitions. [2023-11-19 04:03:40,025 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 186 transitions. [2023-11-19 04:03:40,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2023-11-19 04:03:40,025 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:40,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:40,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:40,133 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 04:03:40,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:40,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 151 states and 185 transitions. [2023-11-19 04:03:40,303 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 185 transitions. [2023-11-19 04:03:40,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 04:03:40,303 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:40,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:40,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:40,369 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 04:03:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:40,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 150 states and 184 transitions. [2023-11-19 04:03:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 184 transitions. [2023-11-19 04:03:40,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-19 04:03:40,399 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:40,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:40,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:03:40,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 149 states and 183 transitions. [2023-11-19 04:03:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 183 transitions. [2023-11-19 04:03:40,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 04:03:40,604 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:40,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:40,704 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 04:03:40,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:40,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 148 states and 182 transitions. [2023-11-19 04:03:40,734 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 182 transitions. [2023-11-19 04:03:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-19 04:03:40,735 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:40,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:40,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:40,831 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 04:03:40,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:40,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 147 states and 181 transitions. [2023-11-19 04:03:40,854 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 181 transitions. [2023-11-19 04:03:40,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 04:03:40,855 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:40,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:41,037 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 04:03:41,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:41,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 150 states and 185 transitions. [2023-11-19 04:03:41,082 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 185 transitions. [2023-11-19 04:03:41,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-19 04:03:41,082 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:41,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:41,372 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 04:03:41,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:41,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 153 states and 191 transitions. [2023-11-19 04:03:41,608 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 191 transitions. [2023-11-19 04:03:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 04:03:41,614 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:41,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:41,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:41,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:03:41,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 152 states and 190 transitions. [2023-11-19 04:03:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 190 transitions. [2023-11-19 04:03:41,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-19 04:03:41,728 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:41,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:41,907 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 04:03:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 153 states and 192 transitions. [2023-11-19 04:03:42,108 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 192 transitions. [2023-11-19 04:03:42,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:03:42,110 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:42,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:42,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:42,153 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 04:03:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:42,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 153 states and 188 transitions. [2023-11-19 04:03:42,164 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 188 transitions. [2023-11-19 04:03:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:03:42,167 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:42,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:42,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:42,577 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 04:03:43,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:43,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 155 states and 193 transitions. [2023-11-19 04:03:43,128 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 193 transitions. [2023-11-19 04:03:43,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-19 04:03:43,129 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:43,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:43,379 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 04:03:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:44,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 157 states and 196 transitions. [2023-11-19 04:03:44,286 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 196 transitions. [2023-11-19 04:03:44,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:03:44,287 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:44,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:44,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:44,441 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 04:03:45,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 160 states and 201 transitions. [2023-11-19 04:03:45,114 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 201 transitions. [2023-11-19 04:03:45,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:03:45,115 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:45,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:45,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:45,164 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 04:03:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:45,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 166 states and 212 transitions. [2023-11-19 04:03:45,939 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 212 transitions. [2023-11-19 04:03:45,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:03:45,940 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:45,940 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:45,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:46,128 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 04:03:47,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 172 states and 222 transitions. [2023-11-19 04:03:47,127 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 222 transitions. [2023-11-19 04:03:47,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:03:47,127 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:47,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:47,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:47,159 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 04:03:47,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:47,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 173 states and 224 transitions. [2023-11-19 04:03:47,463 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 224 transitions. [2023-11-19 04:03:47,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:03:47,463 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:47,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:47,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:47,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:03:47,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:47,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 175 states and 227 transitions. [2023-11-19 04:03:47,922 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 227 transitions. [2023-11-19 04:03:47,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:03:47,922 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:47,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:47,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:48,422 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 04:03:50,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:50,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 180 states and 235 transitions. [2023-11-19 04:03:50,449 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 235 transitions. [2023-11-19 04:03:50,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:03:50,450 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:50,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:51,154 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 04:03:52,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:52,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 182 states and 240 transitions. [2023-11-19 04:03:52,287 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 240 transitions. [2023-11-19 04:03:52,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:03:52,293 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:52,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:52,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:52,765 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 04:03:54,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:54,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 188 states and 248 transitions. [2023-11-19 04:03:54,913 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 248 transitions. [2023-11-19 04:03:54,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:03:54,914 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:54,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:54,965 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 04:03:54,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 187 states and 247 transitions. [2023-11-19 04:03:54,988 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 247 transitions. [2023-11-19 04:03:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:03:54,988 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:54,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:55,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:55,414 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 04:03:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:55,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 189 states and 250 transitions. [2023-11-19 04:03:55,451 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 250 transitions. [2023-11-19 04:03:55,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:03:55,452 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:55,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:55,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:55,505 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 04:03:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:55,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 188 states and 249 transitions. [2023-11-19 04:03:55,536 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 249 transitions. [2023-11-19 04:03:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:03:55,538 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:55,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:55,890 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 04:03:55,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:55,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 189 states and 250 transitions. [2023-11-19 04:03:55,916 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 250 transitions. [2023-11-19 04:03:55,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:03:55,916 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:55,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:55,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:55,943 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 04:03:56,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:56,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 191 states and 254 transitions. [2023-11-19 04:03:56,302 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 254 transitions. [2023-11-19 04:03:56,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:03:56,303 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:56,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:56,353 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 04:03:56,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 195 states and 261 transitions. [2023-11-19 04:03:56,792 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 261 transitions. [2023-11-19 04:03:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:03:56,792 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:56,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:56,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:56,886 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 04:03:56,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:56,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 194 states and 260 transitions. [2023-11-19 04:03:56,922 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 260 transitions. [2023-11-19 04:03:56,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:03:56,925 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:56,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:56,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:57,407 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 04:03:57,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 195 states and 261 transitions. [2023-11-19 04:03:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 261 transitions. [2023-11-19 04:03:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:03:57,446 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:57,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:57,719 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 04:03:57,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 196 states and 263 transitions. [2023-11-19 04:03:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 263 transitions. [2023-11-19 04:03:57,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:03:57,954 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:57,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:58,033 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 04:03:58,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:58,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 196 states and 262 transitions. [2023-11-19 04:03:58,437 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 262 transitions. [2023-11-19 04:03:58,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:03:58,437 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:58,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:58,475 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 04:03:59,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:59,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 199 states and 266 transitions. [2023-11-19 04:03:59,526 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 266 transitions. [2023-11-19 04:03:59,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:03:59,527 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:59,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:59,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:59,565 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 04:03:59,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:59,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 198 states and 265 transitions. [2023-11-19 04:03:59,585 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 265 transitions. [2023-11-19 04:03:59,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:03:59,585 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:59,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:59,902 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 04:04:00,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:00,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 197 states and 264 transitions. [2023-11-19 04:04:00,450 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 264 transitions. [2023-11-19 04:04:00,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:04:00,450 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:00,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:00,493 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 04:04:00,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 198 states and 265 transitions. [2023-11-19 04:04:00,527 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 265 transitions. [2023-11-19 04:04:00,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:04:00,527 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:00,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:00,592 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 04:04:00,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:00,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 200 states and 272 transitions. [2023-11-19 04:04:00,628 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 272 transitions. [2023-11-19 04:04:00,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:04:00,630 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:00,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:00,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:00,936 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 04:04:03,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:03,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 203 states and 277 transitions. [2023-11-19 04:04:03,269 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 277 transitions. [2023-11-19 04:04:03,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:04:03,270 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:03,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:03,645 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 04:04:04,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:04,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 205 states and 280 transitions. [2023-11-19 04:04:04,919 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 280 transitions. [2023-11-19 04:04:04,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:04:04,919 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:04,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:04,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:05,429 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 04:04:07,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:07,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 207 states and 283 transitions. [2023-11-19 04:04:07,449 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 283 transitions. [2023-11-19 04:04:07,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:04:07,450 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:07,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:07,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:07,503 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 04:04:08,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 208 states and 285 transitions. [2023-11-19 04:04:08,030 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 285 transitions. [2023-11-19 04:04:08,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:04:08,030 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:08,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:08,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:08,213 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 04:04:08,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:08,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 209 states and 286 transitions. [2023-11-19 04:04:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 286 transitions. [2023-11-19 04:04:08,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:04:08,828 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:08,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:09,083 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 04:04:09,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:09,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 209 states and 284 transitions. [2023-11-19 04:04:09,839 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 284 transitions. [2023-11-19 04:04:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:04:09,839 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:09,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:09,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:09,885 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 04:04:10,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:10,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 208 states and 281 transitions. [2023-11-19 04:04:10,353 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 281 transitions. [2023-11-19 04:04:10,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:04:10,354 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:10,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:10,406 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 04:04:10,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:10,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 211 states and 283 transitions. [2023-11-19 04:04:10,936 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 283 transitions. [2023-11-19 04:04:10,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:04:10,936 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:10,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:10,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:11,710 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:04:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 224 states and 306 transitions. [2023-11-19 04:04:19,327 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 306 transitions. [2023-11-19 04:04:19,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:04:19,327 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:19,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:19,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:19,508 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:04:20,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:20,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 225 states and 308 transitions. [2023-11-19 04:04:20,198 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 308 transitions. [2023-11-19 04:04:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:04:20,199 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:20,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:20,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.