./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/array-fpi/condn.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 30e01a73 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_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC/config/KojakReach.xml -i ../../sv-benchmarks/c/array-fpi/condn.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC/config/svcomp-Overflow-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC --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 d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:09:02,440 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:09:02,574 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC/config/svcomp-Overflow-32bit-Kojak_Default.epf [2023-11-23 20:09:02,582 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:09:02,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2023-11-23 20:09:02,624 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:09:02,625 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:09:02,625 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2023-11-23 20:09:02,627 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 20:09:02,632 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 20:09:02,633 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:09:02,634 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:09:02,634 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:09:02,636 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:09:02,637 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:09:02,637 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:09:02,638 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:09:02,638 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:09:02,639 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:09:02,639 INFO L153 SettingsManager]: * Check absence of signed integer overflows=true [2023-11-23 20:09:02,640 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 20:09:02,640 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:09:02,641 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:09:02,643 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:09:02,644 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2023-11-23 20:09:02,644 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2023-11-23 20:09:02,645 INFO L153 SettingsManager]: * Theory for external solver=ALL [2023-11-23 20:09:02,645 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:09:02,646 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-23 20:09:02,646 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:09:02,648 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:09:02,670 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:09:02,670 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2023-11-23 20:09:02,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:09:02,671 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:09:02,671 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_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d395fadb914a95d9511046d910130b84077290c26c4e0d02bd3863b898526b50 [2023-11-23 20:09:03,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:09:03,059 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:09:03,062 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:09:03,063 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:09:03,064 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:09:03,066 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC/../../sv-benchmarks/c/array-fpi/condn.c [2023-11-23 20:09:06,214 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:09:06,447 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:09:06,447 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/sv-benchmarks/c/array-fpi/condn.c [2023-11-23 20:09:06,456 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC/data/f15d88f94/11c610122bf6454eb2e68fe633ef0eb3/FLAGbceec882c [2023-11-23 20:09:06,474 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC/data/f15d88f94/11c610122bf6454eb2e68fe633ef0eb3 [2023-11-23 20:09:06,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:09:06,478 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:09:06,480 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:09:06,481 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:09:06,486 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:09:06,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:09:06" (1/1) ... [2023-11-23 20:09:06,488 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43fbc4a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:09:06, skipping insertion in model container [2023-11-23 20:09:06,489 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:09:06" (1/1) ... [2023-11-23 20:09:06,512 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:09:06,751 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:09:06,768 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:09:06,804 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:09:06,823 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:09:06,824 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:09:06 WrapperNode [2023-11-23 20:09:06,824 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:09:06,826 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:09:06,826 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:09:06,827 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:09:06,835 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:09:06" (1/1) ... [2023-11-23 20:09:06,856 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:09:06" (1/1) ... [2023-11-23 20:09:06,889 INFO L138 Inliner]: procedures = 16, calls = 25, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 86 [2023-11-23 20:09:06,890 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:09:06,891 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:09:06,891 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:09:06,892 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:09:06,902 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:09:06" (1/1) ... [2023-11-23 20:09:06,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:09:06" (1/1) ... [2023-11-23 20:09:06,908 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:09:06" (1/1) ... [2023-11-23 20:09:06,909 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:09:06" (1/1) ... [2023-11-23 20:09:06,927 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:09:06" (1/1) ... [2023-11-23 20:09:06,932 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:09:06" (1/1) ... [2023-11-23 20:09:06,939 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:09:06" (1/1) ... [2023-11-23 20:09:06,945 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:09:06" (1/1) ... [2023-11-23 20:09:06,947 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:09:06,950 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:09:06,951 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:09:06,951 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:09:06,953 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:09:06" (1/1) ... [2023-11-23 20:09:06,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2023-11-23 20:09:06,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC/z3 [2023-11-23 20:09:06,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2023-11-23 20:09:07,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db2a7a91-dfed-46a0-8c19-c36848ba7c97/bin/ukojak-verify-1t5iHCbJaC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2023-11-23 20:09:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:09:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:09:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 20:09:07,055 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-23 20:09:07,056 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:09:07,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:09:07,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 20:09:07,143 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:09:07,146 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:09:07,323 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:09:07,398 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:09:07,399 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-23 20:09:07,401 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:09:07 BoogieIcfgContainer [2023-11-23 20:09:07,401 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:09:07,402 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2023-11-23 20:09:07,403 INFO L270 PluginConnector]: Initializing CodeCheck... [2023-11-23 20:09:07,415 INFO L274 PluginConnector]: CodeCheck initialized [2023-11-23 20:09:07,416 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:09:07" (1/1) ... [2023-11-23 20:09:07,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:09:07,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:07,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 19 states and 22 transitions. [2023-11-23 20:09:07,492 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2023-11-23 20:09:07,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2023-11-23 20:09:07,495 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:07,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:07,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:07,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 21 states and 26 transitions. [2023-11-23 20:09:07,854 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-11-23 20:09:07,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 20:09:07,855 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:07,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:07,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:08,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:08,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 22 states and 27 transitions. [2023-11-23 20:09:08,067 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-23 20:09:08,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 20:09:08,068 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:08,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:08,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:08,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:08,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 23 states and 28 transitions. [2023-11-23 20:09:08,220 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-23 20:09:08,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-23 20:09:08,221 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:08,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 25 states and 32 transitions. [2023-11-23 20:09:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2023-11-23 20:09:08,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 20:09:08,565 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:08,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:08,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:08,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:08,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 28 states and 36 transitions. [2023-11-23 20:09:08,877 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2023-11-23 20:09:08,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-23 20:09:08,878 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:08,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:08,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:08,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:09:09,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:09,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 30 states and 40 transitions. [2023-11-23 20:09:09,014 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2023-11-23 20:09:09,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 20:09:09,014 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:09,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:09,084 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:09:09,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:09,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 31 states and 42 transitions. [2023-11-23 20:09:09,354 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2023-11-23 20:09:09,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 20:09:09,355 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:09,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:09,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:09,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:09:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:09,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 32 states and 43 transitions. [2023-11-23 20:09:09,449 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2023-11-23 20:09:09,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-23 20:09:09,450 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:09,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:09,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:09,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:09,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 28 states and 35 transitions. [2023-11-23 20:09:09,608 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2023-11-23 20:09:09,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 20:09:09,609 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:09,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:09,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:09,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 31 states and 40 transitions. [2023-11-23 20:09:09,947 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2023-11-23 20:09:09,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-23 20:09:09,948 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:09,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:10,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:09:10,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:10,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 33 states and 44 transitions. [2023-11-23 20:09:10,147 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 44 transitions. [2023-11-23 20:09:10,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 20:09:10,148 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:10,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:10,223 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:09:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:10,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 33 states and 43 transitions. [2023-11-23 20:09:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2023-11-23 20:09:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 20:09:10,475 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:10,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:10,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:09:10,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:10,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 35 states and 47 transitions. [2023-11-23 20:09:10,599 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 47 transitions. [2023-11-23 20:09:10,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-23 20:09:10,600 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:10,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:10,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:09:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:10,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 38 states and 51 transitions. [2023-11-23 20:09:10,900 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 51 transitions. [2023-11-23 20:09:10,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 20:09:10,901 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:10,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:09:10,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:10,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 39 states and 52 transitions. [2023-11-23 20:09:10,953 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 52 transitions. [2023-11-23 20:09:10,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 20:09:10,954 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:10,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:11,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 42 states and 57 transitions. [2023-11-23 20:09:11,325 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 57 transitions. [2023-11-23 20:09:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-23 20:09:11,326 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:11,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:11,593 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-23 20:09:12,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:12,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 46 states and 64 transitions. [2023-11-23 20:09:12,197 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 64 transitions. [2023-11-23 20:09:12,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-23 20:09:12,201 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:12,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:12,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:12,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:09:12,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:12,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 48 states and 68 transitions. [2023-11-23 20:09:12,472 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 68 transitions. [2023-11-23 20:09:12,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-23 20:09:12,475 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:12,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:12,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:12,596 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:09:12,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:12,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 51 states and 72 transitions. [2023-11-23 20:09:12,837 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 72 transitions. [2023-11-23 20:09:12,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 20:09:12,838 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:12,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:13,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 54 states and 78 transitions. [2023-11-23 20:09:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 78 transitions. [2023-11-23 20:09:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-23 20:09:13,374 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:13,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:13,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:09:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 51 states and 70 transitions. [2023-11-23 20:09:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 70 transitions. [2023-11-23 20:09:13,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 20:09:13,597 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:13,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:13,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:13,967 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:15,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:15,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 58 states and 80 transitions. [2023-11-23 20:09:15,274 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 80 transitions. [2023-11-23 20:09:15,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-23 20:09:15,275 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:15,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:15,530 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:09:15,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 62 states and 85 transitions. [2023-11-23 20:09:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 85 transitions. [2023-11-23 20:09:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-23 20:09:15,825 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:15,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:16,042 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:16,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:16,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 65 states and 92 transitions. [2023-11-23 20:09:16,415 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 92 transitions. [2023-11-23 20:09:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-23 20:09:16,415 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:16,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:16,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:16,557 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:09:17,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 68 states and 96 transitions. [2023-11-23 20:09:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 96 transitions. [2023-11-23 20:09:17,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-23 20:09:17,003 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:17,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:17,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:17,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 71 states and 103 transitions. [2023-11-23 20:09:17,680 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 103 transitions. [2023-11-23 20:09:17,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 20:09:17,681 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:17,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-23 20:09:18,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:18,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 74 states and 107 transitions. [2023-11-23 20:09:18,370 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 107 transitions. [2023-11-23 20:09:18,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-23 20:09:18,371 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:18,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:18,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:18,527 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2023-11-23 20:09:18,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:18,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 71 states and 100 transitions. [2023-11-23 20:09:18,614 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 100 transitions. [2023-11-23 20:09:18,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-23 20:09:18,615 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:18,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:18,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:18,977 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-23 20:09:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 79 states and 111 transitions. [2023-11-23 20:09:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 111 transitions. [2023-11-23 20:09:20,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-23 20:09:20,148 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:20,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:20,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:20,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 82 states and 118 transitions. [2023-11-23 20:09:20,948 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 118 transitions. [2023-11-23 20:09:20,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-23 20:09:20,949 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:20,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:21,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:09:23,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 91 states and 131 transitions. [2023-11-23 20:09:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 131 transitions. [2023-11-23 20:09:23,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-23 20:09:23,611 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:23,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:23,968 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:24,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:24,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 94 states and 139 transitions. [2023-11-23 20:09:24,497 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 139 transitions. [2023-11-23 20:09:24,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-23 20:09:24,498 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:24,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:24,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:24,726 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2023-11-23 20:09:25,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:25,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 97 states and 144 transitions. [2023-11-23 20:09:25,260 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 144 transitions. [2023-11-23 20:09:25,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-23 20:09:25,260 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:25,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:25,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:25,454 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 20:09:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:25,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 100 states and 148 transitions. [2023-11-23 20:09:25,778 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 148 transitions. [2023-11-23 20:09:25,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-23 20:09:25,779 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:25,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:26,182 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:26,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 103 states and 156 transitions. [2023-11-23 20:09:26,726 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 156 transitions. [2023-11-23 20:09:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-23 20:09:26,727 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:26,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:27,424 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 33 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:09:30,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:30,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 115 states and 173 transitions. [2023-11-23 20:09:30,818 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 173 transitions. [2023-11-23 20:09:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-23 20:09:30,819 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:30,819 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:30,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:31,068 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-11-23 20:09:31,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:31,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 118 states and 177 transitions. [2023-11-23 20:09:31,437 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 177 transitions. [2023-11-23 20:09:31,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-23 20:09:31,437 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:31,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:31,872 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 121 states and 186 transitions. [2023-11-23 20:09:32,568 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 186 transitions. [2023-11-23 20:09:32,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-23 20:09:32,573 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:32,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:32,829 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2023-11-23 20:09:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:33,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 124 states and 191 transitions. [2023-11-23 20:09:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 191 transitions. [2023-11-23 20:09:33,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-23 20:09:33,554 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:33,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-11-23 20:09:36,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:36,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 134 states and 204 transitions. [2023-11-23 20:09:36,314 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 204 transitions. [2023-11-23 20:09:36,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2023-11-23 20:09:36,315 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:36,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:36,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:36,852 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:37,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 137 states and 213 transitions. [2023-11-23 20:09:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 213 transitions. [2023-11-23 20:09:37,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-23 20:09:37,595 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:37,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:37,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:38,516 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 48 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 20:09:43,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:43,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 152 states and 234 transitions. [2023-11-23 20:09:43,593 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 234 transitions. [2023-11-23 20:09:43,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-23 20:09:43,594 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:43,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:43,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:44,152 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:45,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:45,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 155 states and 244 transitions. [2023-11-23 20:09:45,147 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 244 transitions. [2023-11-23 20:09:45,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-23 20:09:45,148 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:45,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:45,527 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2023-11-23 20:09:46,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:46,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 158 states and 250 transitions. [2023-11-23 20:09:46,416 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 250 transitions. [2023-11-23 20:09:46,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-23 20:09:46,417 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:46,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:46,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2023-11-23 20:09:47,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:47,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 161 states and 254 transitions. [2023-11-23 20:09:47,153 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 254 transitions. [2023-11-23 20:09:47,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2023-11-23 20:09:47,154 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:47,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:09:48,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2023-11-23 20:09:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 164 states and 264 transitions. [2023-11-23 20:09:48,655 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 264 transitions. [2023-11-23 20:09:48,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-23 20:09:48,656 INFO L423 CodeCheckObserver]: Error Path is FOUND. [2023-11-23 20:09:48,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:09:48,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:09:49,773 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 66 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked.