./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/bin/ukojak-verify-G8NBE6pJGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/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_a7ad6013-a53c-441a-87a4-9cba6d31b165/bin/ukojak-verify-G8NBE6pJGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/bin/ukojak-verify-G8NBE6pJGL/config/KojakReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/bin/ukojak-verify-G8NBE6pJGL/config/svcomp-Overflow-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/bin/ukojak-verify-G8NBE6pJGL --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e62f050c54efcaebe70ca4fab804a982fed550b56ad5b495e4ea54f0b2b8135b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:03:48,957 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:03:49,056 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/bin/ukojak-verify-G8NBE6pJGL/config/svcomp-Overflow-32bit-Kojak_Default.epf [2023-11-19 04:03:49,070 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:03:49,071 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2023-11-19 04:03:49,103 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:03:49,105 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:03:49,105 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2023-11-19 04:03:49,106 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 04:03:49,107 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 04:03:49,108 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:03:49,109 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:03:49,109 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:03:49,110 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:03:49,111 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:03:49,111 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:03:49,112 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:03:49,112 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:03:49,113 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:03:49,114 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-19 04:03:49,114 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-19 04:03:49,115 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:03:49,115 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:03:49,116 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:03:49,116 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2023-11-19 04:03:49,117 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2023-11-19 04:03:49,117 INFO L153 SettingsManager]: * Theory for external solver=ALL [2023-11-19 04:03:49,118 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:03:49,118 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-19 04:03:49,119 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:03:49,119 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:03:49,120 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:03:49,120 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2023-11-19 04:03:49,120 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:03:49,121 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:03:49,121 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_a7ad6013-a53c-441a-87a4-9cba6d31b165/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/bin/ukojak-verify-G8NBE6pJGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e62f050c54efcaebe70ca4fab804a982fed550b56ad5b495e4ea54f0b2b8135b [2023-11-19 04:03:49,410 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:03:49,450 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:03:49,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:03:49,455 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:03:49,455 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:03:49,457 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/bin/ukojak-verify-G8NBE6pJGL/../../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound1.c [2023-11-19 04:03:52,814 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:03:53,049 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:03:53,050 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound1.c [2023-11-19 04:03:53,058 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/bin/ukojak-verify-G8NBE6pJGL/data/4b503f774/bf8fe293b852454191b7aa85ec64365f/FLAG868b8df52 [2023-11-19 04:03:53,074 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/bin/ukojak-verify-G8NBE6pJGL/data/4b503f774/bf8fe293b852454191b7aa85ec64365f [2023-11-19 04:03:53,077 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:03:53,078 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:03:53,080 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:03:53,080 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:03:53,085 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:03:53,086 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,088 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7072839c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:53, skipping insertion in model container [2023-11-19 04:03:53,088 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,110 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:03:53,323 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:03:53,342 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:03:53,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:03:53,386 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:03:53,386 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:53 WrapperNode [2023-11-19 04:03:53,387 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:03:53,388 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:03:53,388 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:03:53,388 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:03:53,396 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,403 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,425 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 76 [2023-11-19 04:03:53,425 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:03:53,426 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:03:53,426 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:03:53,427 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:03:53,436 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,437 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,439 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,439 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,443 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,446 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,448 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,449 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,451 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:03:53,452 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:03:53,452 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:03:53,452 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:03:53,453 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-19 04:03:53,476 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/bin/ukojak-verify-G8NBE6pJGL/z3 [2023-11-19 04:03:53,491 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/bin/ukojak-verify-G8NBE6pJGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2023-11-19 04:03:53,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a7ad6013-a53c-441a-87a4-9cba6d31b165/bin/ukojak-verify-G8NBE6pJGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2023-11-19 04:03:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:03:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:03:53,532 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:03:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:03:53,532 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:03:53,533 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:03:53,533 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2023-11-19 04:03:53,533 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2023-11-19 04:03:53,599 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:03:53,606 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:03:53,848 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:03:53,891 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:03:53,892 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:03:53,899 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:03:53 BoogieIcfgContainer [2023-11-19 04:03:53,900 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:03:53,901 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2023-11-19 04:03:53,901 INFO L270 PluginConnector]: Initializing CodeCheck... [2023-11-19 04:03:53,910 INFO L274 PluginConnector]: CodeCheck initialized [2023-11-19 04:03:53,911 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:03:53" (1/1) ... [2023-11-19 04:03:53,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:03:53,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:53,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 60 states and 65 transitions. [2023-11-19 04:03:53,972 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2023-11-19 04:03:53,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:03:53,977 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:53,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:54,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:54,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 04:03:54,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:03:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:03:54,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:54,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 60 states and 64 transitions. [2023-11-19 04:03:54,195 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2023-11-19 04:03:54,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-19 04:03:54,196 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:54,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:54,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:03:54,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 62 states and 68 transitions. [2023-11-19 04:03:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 68 transitions. [2023-11-19 04:03:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-19 04:03:54,455 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:54,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:54,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:54,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:03:54,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:54,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 63 states and 69 transitions. [2023-11-19 04:03:54,556 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 69 transitions. [2023-11-19 04:03:54,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:03:54,557 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:54,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:54,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:03:54,598 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:03:54,674 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:03:54,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 64 states and 70 transitions. [2023-11-19 04:03:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 70 transitions. [2023-11-19 04:03:54,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-19 04:03:54,764 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:54,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:54,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:03:54,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:03:54,828 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:03:55,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:55,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 69 states and 78 transitions. [2023-11-19 04:03:55,085 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2023-11-19 04:03:55,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-19 04:03:55,086 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:55,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:55,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:03:55,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:03:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:03:55,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:55,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 70 states and 79 transitions. [2023-11-19 04:03:55,157 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2023-11-19 04:03:55,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-19 04:03:55,158 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:55,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:55,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:03:55,195 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:03:55,275 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:03:55,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:55,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 77 states and 90 transitions. [2023-11-19 04:03:55,813 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2023-11-19 04:03:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-19 04:03:55,814 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:55,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:55,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:03:55,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:03:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:03:56,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:56,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 85 states and 103 transitions. [2023-11-19 04:03:56,757 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 103 transitions. [2023-11-19 04:03:56,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-19 04:03:56,758 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:56,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:56,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:56,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:03:56,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:03:56,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:03:58,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 94 states and 116 transitions. [2023-11-19 04:03:58,215 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 116 transitions. [2023-11-19 04:03:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-19 04:03:58,215 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:58,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:58,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:58,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:03:58,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:03:58,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:03:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:59,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 101 states and 125 transitions. [2023-11-19 04:03:59,720 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 125 transitions. [2023-11-19 04:03:59,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 04:03:59,721 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:59,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:03:59,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:03:59,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:03:59,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:03:59,874 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:03:59,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:03:59,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 104 states and 131 transitions. [2023-11-19 04:03:59,981 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 131 transitions. [2023-11-19 04:03:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-19 04:03:59,983 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:03:59,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:00,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:00,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:04:00,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:00,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:00,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 108 states and 139 transitions. [2023-11-19 04:04:00,407 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 139 transitions. [2023-11-19 04:04:00,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 04:04:00,408 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:00,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:00,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:04:00,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:00,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:00,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 112 states and 147 transitions. [2023-11-19 04:04:00,931 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 147 transitions. [2023-11-19 04:04:00,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-19 04:04:00,932 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:00,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:00,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:04:00,963 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:00,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:01,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 116 states and 156 transitions. [2023-11-19 04:04:01,253 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 156 transitions. [2023-11-19 04:04:01,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-19 04:04:01,254 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:01,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:01,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:04:01,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:01,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:01,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:01,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 119 states and 160 transitions. [2023-11-19 04:04:01,910 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 160 transitions. [2023-11-19 04:04:01,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 04:04:01,911 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:01,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:01,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:01,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:04:01,941 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:02,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:02,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:02,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 123 states and 165 transitions. [2023-11-19 04:04:02,795 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 165 transitions. [2023-11-19 04:04:02,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 04:04:02,796 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:02,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:02,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:02,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:04:02,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:02,904 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:03,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 122 states and 164 transitions. [2023-11-19 04:04:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 164 transitions. [2023-11-19 04:04:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-19 04:04:03,110 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:03,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:03,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:04:03,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:03,331 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:05,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:05,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 128 states and 178 transitions. [2023-11-19 04:04:05,094 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 178 transitions. [2023-11-19 04:04:05,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 04:04:05,095 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:05,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:05,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:05,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:04:05,131 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:05,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:05,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 130 states and 180 transitions. [2023-11-19 04:04:05,840 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 180 transitions. [2023-11-19 04:04:05,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-19 04:04:05,841 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:05,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:05,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:04:05,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:05,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:06,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 137 states and 192 transitions. [2023-11-19 04:04:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 192 transitions. [2023-11-19 04:04:06,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 04:04:06,808 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:06,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:06,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:06,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:04:06,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:04:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:10,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 155 states and 219 transitions. [2023-11-19 04:04:10,228 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 219 transitions. [2023-11-19 04:04:10,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-19 04:04:10,231 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:10,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:10,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-19 04:04:10,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 04:04:10,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 158 states and 224 transitions. [2023-11-19 04:04:10,822 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 224 transitions. [2023-11-19 04:04:10,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 04:04:10,822 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:10,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:10,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:10,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:04:10,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:12,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:12,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 164 states and 239 transitions. [2023-11-19 04:04:12,394 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 239 transitions. [2023-11-19 04:04:12,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-19 04:04:12,394 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:12,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:12,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:12,418 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 04:04:12,420 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:12,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:12,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:12,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 168 states and 249 transitions. [2023-11-19 04:04:12,996 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 249 transitions. [2023-11-19 04:04:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 04:04:12,996 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:12,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:13,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:13,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:04:13,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:15,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:15,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 188 states and 295 transitions. [2023-11-19 04:04:15,930 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 295 transitions. [2023-11-19 04:04:15,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 04:04:15,931 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:15,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:15,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:04:15,957 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:16,226 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:17,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 194 states and 308 transitions. [2023-11-19 04:04:17,882 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 308 transitions. [2023-11-19 04:04:17,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 04:04:17,883 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:17,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:17,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:04:17,905 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:18,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:20,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 205 states and 343 transitions. [2023-11-19 04:04:20,839 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 343 transitions. [2023-11-19 04:04:20,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-19 04:04:20,840 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:20,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:20,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:04:20,864 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:22,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:22,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 209 states and 349 transitions. [2023-11-19 04:04:22,600 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 349 transitions. [2023-11-19 04:04:22,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 04:04:22,601 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:22,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:22,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:22,638 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:04:22,639 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:25,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:25,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 218 states and 367 transitions. [2023-11-19 04:04:25,450 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 367 transitions. [2023-11-19 04:04:25,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 04:04:25,451 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:25,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:25,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:25,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:04:25,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:25,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 219 states and 368 transitions. [2023-11-19 04:04:25,942 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 368 transitions. [2023-11-19 04:04:25,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 04:04:25,943 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:25,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:25,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:25,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:04:25,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:27,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 224 states and 374 transitions. [2023-11-19 04:04:27,428 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 374 transitions. [2023-11-19 04:04:27,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-19 04:04:27,429 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:27,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:27,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:04:27,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:32,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 243 states and 403 transitions. [2023-11-19 04:04:32,930 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 403 transitions. [2023-11-19 04:04:32,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 04:04:32,931 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:32,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:32,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:04:32,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:32,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:38,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:38,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 253 states and 423 transitions. [2023-11-19 04:04:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 423 transitions. [2023-11-19 04:04:38,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 04:04:38,196 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:38,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:38,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:38,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-19 04:04:38,224 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:38,315 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:38,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:38,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 254 states and 424 transitions. [2023-11-19 04:04:38,909 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 424 transitions. [2023-11-19 04:04:38,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 04:04:38,910 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:38,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:38,939 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:04:38,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:39,012 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:39,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:39,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 255 states and 424 transitions. [2023-11-19 04:04:39,658 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 424 transitions. [2023-11-19 04:04:39,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-19 04:04:39,658 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:39,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:39,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:39,682 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 04:04:39,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:40,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:41,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:41,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 257 states and 427 transitions. [2023-11-19 04:04:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 427 transitions. [2023-11-19 04:04:41,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 04:04:41,503 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:41,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:41,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-19 04:04:41,528 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:41,585 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:04:42,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-19 04:04:42,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 55 states and 60 transitions. [2023-11-19 04:04:42,004 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2023-11-19 04:04:42,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-19 04:04:42,004 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-19 04:04:42,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:04:42,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:04:42,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 04:04:42,032 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:04:42,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.