./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a0165632 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_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/config/KojakReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/config/svcomp-Reach-32bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:00:54,660 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:00:54,764 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/config/svcomp-Reach-32bit-Kojak_Default.epf [2024-11-09 01:00:54,771 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 01:00:54,771 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2024-11-09 01:00:54,808 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:00:54,809 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:00:54,810 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-11-09 01:00:54,814 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 01:00:54,814 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 01:00:54,814 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:00:54,815 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:00:54,815 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:00:54,815 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 01:00:54,816 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:00:54,816 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:00:54,817 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:00:54,817 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:00:54,821 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:00:54,821 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:00:54,821 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:00:54,826 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:00:54,826 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:00:54,826 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-11-09 01:00:54,827 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-11-09 01:00:54,827 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-11-09 01:00:54,827 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:00:54,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-09 01:00:54,828 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:00:54,828 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:00:54,828 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:00:54,829 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2024-11-09 01:00:54,829 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 01:00:54,833 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_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a [2024-11-09 01:00:55,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:00:55,155 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:00:55,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:00:55,160 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:00:55,160 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:00:55,162 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i Unable to find full path for "g++" [2024-11-09 01:00:57,440 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:00:57,692 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:00:57,693 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2024-11-09 01:00:57,703 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/data/5b99f1ed9/6c05159c905a4acfbb26120cd3a021eb/FLAG558f5a14f [2024-11-09 01:00:57,721 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/data/5b99f1ed9/6c05159c905a4acfbb26120cd3a021eb [2024-11-09 01:00:57,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:00:57,726 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:00:57,728 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:00:57,728 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:00:57,736 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:00:57,740 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:00:57" (1/1) ... [2024-11-09 01:00:57,741 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22d7f83b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:00:57, skipping insertion in model container [2024-11-09 01:00:57,741 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:00:57" (1/1) ... [2024-11-09 01:00:57,782 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:00:58,048 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2024-11-09 01:00:58,084 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2024-11-09 01:00:58,086 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:00:58,097 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:00:58,112 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2024-11-09 01:00:58,135 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2024-11-09 01:00:58,141 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:00:58,160 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:00:58,161 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:00:58 WrapperNode [2024-11-09 01:00:58,161 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:00:58,162 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:00:58,163 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:00:58,163 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:00:58,172 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:00:58" (1/1) ... [2024-11-09 01:00:58,184 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:00:58" (1/1) ... [2024-11-09 01:00:58,210 INFO L138 Inliner]: procedures = 27, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 85 [2024-11-09 01:00:58,210 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:00:58,211 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:00:58,211 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:00:58,211 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:00:58,224 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:00:58" (1/1) ... [2024-11-09 01:00:58,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:00:58" (1/1) ... [2024-11-09 01:00:58,227 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:00:58" (1/1) ... [2024-11-09 01:00:58,227 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:00:58" (1/1) ... [2024-11-09 01:00:58,234 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:00:58" (1/1) ... [2024-11-09 01:00:58,239 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:00:58" (1/1) ... [2024-11-09 01:00:58,240 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:00:58" (1/1) ... [2024-11-09 01:00:58,242 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:00:58" (1/1) ... [2024-11-09 01:00:58,245 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:00:58,246 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:00:58,246 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:00:58,246 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:00:58,247 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:00:58" (1/1) ... [2024-11-09 01:00:58,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-09 01:00:58,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/z3 [2024-11-09 01:00:58,291 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-11-09 01:00:58,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-11-09 01:00:58,341 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:00:58,342 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2024-11-09 01:00:58,343 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2024-11-09 01:00:58,343 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-11-09 01:00:58,343 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-11-09 01:00:58,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-09 01:00:58,344 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:00:58,344 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:00:58,443 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:00:58,445 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:00:58,700 INFO L? ?]: Removed 28 outVars from TransFormulas that were not future-live. [2024-11-09 01:00:58,700 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:00:58,816 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:00:58,816 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 01:00:58,817 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:00:58 BoogieIcfgContainer [2024-11-09 01:00:58,817 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:00:58,818 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-11-09 01:00:58,818 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-11-09 01:00:58,831 INFO L274 PluginConnector]: CodeCheck initialized [2024-11-09 01:00:58,831 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:00:58" (1/1) ... [2024-11-09 01:00:58,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:00:58,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-09 01:00:58,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 27 states and 34 transitions. [2024-11-09 01:00:58,911 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-09 01:00:58,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 01:00:58,914 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-09 01:00:58,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:00:59,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:00:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:00:59,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-09 01:00:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 31 states and 41 transitions. [2024-11-09 01:00:59,619 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2024-11-09 01:00:59,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 01:00:59,620 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-09 01:00:59,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:00:59,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:00:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:00:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-09 01:00:59,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 31 states and 39 transitions. [2024-11-09 01:00:59,759 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2024-11-09 01:00:59,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 01:00:59,760 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-09 01:00:59,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:00:59,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:00:59,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:00:59,871 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 01:00:59,878 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:01:18,251 WARN L873 $PredicateComparison]: unable to prove that (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|) 256) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (and (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0) (let ((.cse0 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (or (and (<= 128 .cse0) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (= (mod (+ .cse0 (- 256)) |v_ULTIMATE.start_gcd_test_~a#1_21|) 0) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|) (= (mod (mod .cse0 |v_ULTIMATE.start_gcd_test_~a#1_21|) 256) 0))) (<= .cse0 127)))))) is different from true [2024-11-09 01:01:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:01:39,735 WARN L873 $PredicateComparison]: unable to prove that (and (not (or (= |c_ULTIMATE.start_main1_~g~0#1| |c_ULTIMATE.start_main1_~x~0#1|) (< |c_ULTIMATE.start_main1_~x~0#1| 0))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|) 256) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (and (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0) (let ((.cse0 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (or (and (<= 128 .cse0) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (= (mod (+ .cse0 (- 256)) |v_ULTIMATE.start_gcd_test_~a#1_21|) 0) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|) (= (mod (mod .cse0 |v_ULTIMATE.start_gcd_test_~a#1_21|) 256) 0))) (<= .cse0 127))))))) is different from true [2024-11-09 01:01:50,064 WARN L851 $PredicateComparison]: unable to prove that (not (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|) 256) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (and (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0) (let ((.cse0 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (or (and (<= 128 .cse0) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (= (mod (+ .cse0 (- 256)) |v_ULTIMATE.start_gcd_test_~a#1_21|) 0) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|) (= (mod (mod .cse0 |v_ULTIMATE.start_gcd_test_~a#1_21|) 256) 0))) (<= .cse0 127))))))) is different from false [2024-11-09 01:02:02,340 WARN L851 $PredicateComparison]: unable to prove that (and (not (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|) 256) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (and (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0) (let ((.cse0 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (or (and (<= 128 .cse0) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (= (mod (+ .cse0 (- 256)) |v_ULTIMATE.start_gcd_test_~a#1_21|) 0) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|) (= (mod (mod .cse0 |v_ULTIMATE.start_gcd_test_~a#1_21|) 256) 0))) (<= .cse0 127))))))) (not (or (= |c_ULTIMATE.start_main1_~g~0#1| |c_ULTIMATE.start_main1_~x~0#1|) (< |c_ULTIMATE.start_main1_~x~0#1| 0)))) is different from false [2024-11-09 01:02:13,490 WARN L851 $PredicateComparison]: unable to prove that (not (and (not (or (= |c_ULTIMATE.start_main1_~g~0#1| |c_ULTIMATE.start_main1_~x~0#1|) (< |c_ULTIMATE.start_main1_~x~0#1| 0))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|) 256) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (and (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0) (let ((.cse0 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (or (and (<= 128 .cse0) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (= (mod (+ .cse0 (- 256)) |v_ULTIMATE.start_gcd_test_~a#1_21|) 0) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|) (= (mod (mod .cse0 |v_ULTIMATE.start_gcd_test_~a#1_21|) 256) 0))) (<= .cse0 127)))))))) is different from false [2024-11-09 01:02:24,519 WARN L873 $PredicateComparison]: unable to prove that (not (and (not (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|) 256) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)) (and (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0) (let ((.cse0 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (or (and (<= 128 .cse0) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (= (mod (+ .cse0 (- 256)) |v_ULTIMATE.start_gcd_test_~a#1_21|) 0) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|)))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_21| Int)) (and (not (= |v_ULTIMATE.start_gcd_test_~a#1_21| 0)) (<= |v_ULTIMATE.start_gcd_test_~a#1_21| 127) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_21|) (= (mod (mod .cse0 |v_ULTIMATE.start_gcd_test_~a#1_21|) 256) 0))) (<= .cse0 127))))))) (not (or (= |c_ULTIMATE.start_main1_~g~0#1| |c_ULTIMATE.start_main1_~x~0#1|) (< |c_ULTIMATE.start_main1_~x~0#1| 0))))) is different from true [2024-11-09 01:02:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-09 01:02:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 36 states and 54 transitions. [2024-11-09 01:02:25,482 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 54 transitions. [2024-11-09 01:02:25,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 01:02:25,483 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-09 01:02:25,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:02:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:02:25,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:02:25,575 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 01:02:25,576 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:02:43,695 WARN L873 $PredicateComparison]: unable to prove that (or (and (let ((.cse0 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_23| Int)) (and (= (mod (+ .cse0 (- 256)) |v_ULTIMATE.start_gcd_test_~a#1_23|) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_23| 127) (not (= |v_ULTIMATE.start_gcd_test_~a#1_23| 0)) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_23|))) (<= 128 .cse0)) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_23| Int)) (and (= (mod (mod .cse0 |v_ULTIMATE.start_gcd_test_~a#1_23|) 256) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_23| 127) (not (= |v_ULTIMATE.start_gcd_test_~a#1_23| 0)) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_23|))) (<= .cse0 127)))) (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0)) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_23| Int)) (and (<= |v_ULTIMATE.start_gcd_test_~a#1_23| 127) (not (= |v_ULTIMATE.start_gcd_test_~a#1_23| 0)) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_23|) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_23|) 256) 0))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|))) is different from true [2024-11-09 01:02:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:05:29,984 WARN L286 SmtUtils]: Spent 52.08s on a formula simplification. DAG size of input: 72 DAG size of output: 20 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:05:40,016 WARN L851 $PredicateComparison]: unable to prove that (not (or (and (let ((.cse0 (mod (* 255 |c_ULTIMATE.start_main1_~x~0#1|) 256))) (or (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_23| Int)) (and (= (mod (+ .cse0 (- 256)) |v_ULTIMATE.start_gcd_test_~a#1_23|) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_23| 127) (not (= |v_ULTIMATE.start_gcd_test_~a#1_23| 0)) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_23|))) (<= 128 .cse0)) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_23| Int)) (and (= (mod (mod .cse0 |v_ULTIMATE.start_gcd_test_~a#1_23|) 256) 0) (<= |v_ULTIMATE.start_gcd_test_~a#1_23| 127) (not (= |v_ULTIMATE.start_gcd_test_~a#1_23| 0)) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_23|))) (<= .cse0 127)))) (<= (+ |c_ULTIMATE.start_main1_~x~0#1| 1) 0)) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_23| Int)) (and (<= |v_ULTIMATE.start_gcd_test_~a#1_23| 127) (not (= |v_ULTIMATE.start_gcd_test_~a#1_23| 0)) (<= |c_ULTIMATE.start_main1_~g~0#1| |v_ULTIMATE.start_gcd_test_~a#1_23|) (= (mod (mod |c_ULTIMATE.start_main1_~x~0#1| |v_ULTIMATE.start_gcd_test_~a#1_23|) 256) 0))) (<= 0 |c_ULTIMATE.start_main1_~x~0#1|)))) is different from false [2024-11-09 01:06:21,135 WARN L286 SmtUtils]: Spent 14.15s on a formula simplification that was a NOOP. DAG size: 21 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:06:21,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-09 01:06:21,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 36 states and 53 transitions. [2024-11-09 01:06:21,267 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 53 transitions. [2024-11-09 01:06:21,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 01:06:21,268 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-09 01:06:21,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 01:06:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-11-09 01:06:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:06:21,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-09 01:06:21,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:07:59,477 WARN L249 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1) with exit command (exit)) stderr output: (error "out of memory") [2024-11-09 01:07:59,478 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck has thrown an exception: java.lang.AssertionError: No Interpolants at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.getInterpolants(InterpolatingTraceCheck.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.CodeCheckObserver.process(CodeCheckObserver.java:467) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.CFGWalker.runObserver(CFGWalker.java:57) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:166) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:150) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:127) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:233) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:227) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:144) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:106) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:319) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2024-11-09 01:07:59,481 INFO L158 Benchmark]: Toolchain (without parser) took 421755.38ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 109.2MB in the beginning and 55.7MB in the end (delta: 53.6MB). Peak memory consumption was 85.7MB. Max. memory is 16.1GB. [2024-11-09 01:07:59,482 INFO L158 Benchmark]: CDTParser took 0.33ms. Allocated memory is still 109.1MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 01:07:59,482 INFO L158 Benchmark]: CACSL2BoogieTranslator took 433.77ms. Allocated memory is still 138.4MB. Free memory was 109.2MB in the beginning and 95.3MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-09 01:07:59,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Ended with exit code 101 [2024-11-09 01:07:59,484 INFO L158 Benchmark]: Boogie Procedure Inliner took 48.11ms. Allocated memory is still 138.4MB. Free memory was 95.3MB in the beginning and 93.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 01:07:59,485 INFO L158 Benchmark]: Boogie Preprocessor took 34.14ms. Allocated memory is still 138.4MB. Free memory was 93.4MB in the beginning and 92.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 01:07:59,486 INFO L158 Benchmark]: RCFGBuilder took 570.89ms. Allocated memory is still 138.4MB. Free memory was 92.1MB in the beginning and 74.4MB in the end (delta: 17.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-11-09 01:07:59,487 INFO L158 Benchmark]: CodeCheck took 420662.98ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 74.4MB in the beginning and 55.7MB in the end (delta: 18.7MB). Peak memory consumption was 50.0MB. Max. memory is 16.1GB. [2024-11-09 01:07:59,490 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - ExceptionOrErrorResult: AssertionError: No Interpolants de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: AssertionError: No Interpolants: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.getInterpolants(InterpolatingTraceCheck.java:138) * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33ms. Allocated memory is still 109.1MB. Free memory is still 69.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 433.77ms. Allocated memory is still 138.4MB. Free memory was 109.2MB in the beginning and 95.3MB in the end (delta: 13.9MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 48.11ms. Allocated memory is still 138.4MB. Free memory was 95.3MB in the beginning and 93.8MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 34.14ms. Allocated memory is still 138.4MB. Free memory was 93.4MB in the beginning and 92.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 570.89ms. Allocated memory is still 138.4MB. Free memory was 92.1MB in the beginning and 74.4MB in the end (delta: 17.7MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * CodeCheck took 420662.98ms. Allocated memory was 138.4MB in the beginning and 167.8MB in the end (delta: 29.4MB). Free memory was 74.4MB in the beginning and 55.7MB in the end (delta: 18.7MB). Peak memory consumption was 50.0MB. Max. memory is 16.1GB. RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/config/KojakReach.xml -i ../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/config/svcomp-Reach-32bit-Kojak_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Kojak --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 01:08:01,649 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 01:08:01,756 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/config/svcomp-Reach-32bit-Kojak_Bitvector.epf [2024-11-09 01:08:01,797 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 01:08:01,798 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 01:08:01,799 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-11-09 01:08:01,799 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 01:08:01,800 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 01:08:01,800 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 01:08:01,801 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 01:08:01,801 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 01:08:01,801 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 01:08:01,802 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 01:08:01,805 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 01:08:01,805 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 01:08:01,805 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 01:08:01,806 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 01:08:01,806 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-09 01:08:01,806 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 01:08:01,807 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-09 01:08:01,807 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 01:08:01,811 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 01:08:01,812 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 01:08:01,812 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-11-09 01:08:01,813 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-11-09 01:08:01,813 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-11-09 01:08:01,813 INFO L153 SettingsManager]: * Command for calling external solver=cvc4 --incremental --print-success --lang smt [2024-11-09 01:08:01,813 INFO L153 SettingsManager]: * Choose which separate solver to use for tracechecks=External_ModelsAndUnsatCoreMode [2024-11-09 01:08:01,814 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 01:08:01,814 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-09 01:08:01,815 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 01:08:01,815 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 01:08:01,815 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 01:08:01,816 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-09 01:08:01,817 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-09 01:08:01,817 INFO L153 SettingsManager]: * Use separate solver for trace checks=false [2024-11-09 01:08:01,817 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_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3d09a4cc0bc23b63ede1d1b9d8e202055edfb550f267c616041c6cb452339e6a [2024-11-09 01:08:02,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 01:08:02,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 01:08:02,219 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 01:08:02,221 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 01:08:02,222 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 01:08:02,223 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/../../sv-benchmarks/c/combinations/gcd_3+newton_2_6.i Unable to find full path for "g++" [2024-11-09 01:08:04,314 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 01:08:04,602 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 01:08:04,602 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i [2024-11-09 01:08:04,609 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/data/ac71818d3/1ebe4d058b1e4a8aae8dd6490cc06a01/FLAGad80c49d2 [2024-11-09 01:08:04,623 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/data/ac71818d3/1ebe4d058b1e4a8aae8dd6490cc06a01 [2024-11-09 01:08:04,625 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 01:08:04,627 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 01:08:04,628 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 01:08:04,628 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 01:08:04,633 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 01:08:04,634 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:08:04" (1/1) ... [2024-11-09 01:08:04,635 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30d4805d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:04, skipping insertion in model container [2024-11-09 01:08:04,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 01:08:04" (1/1) ... [2024-11-09 01:08:04,660 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 01:08:04,892 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2024-11-09 01:08:04,941 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2024-11-09 01:08:04,943 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:08:04,963 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 01:08:05,001 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[1226,1239] [2024-11-09 01:08:05,019 WARN L250 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/sv-benchmarks/c/combinations/gcd_3+newton_2_6.i[2841,2854] [2024-11-09 01:08:05,025 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 01:08:05,087 INFO L204 MainTranslator]: Completed translation [2024-11-09 01:08:05,087 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:05 WrapperNode [2024-11-09 01:08:05,088 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 01:08:05,089 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 01:08:05,089 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 01:08:05,089 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 01:08:05,101 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:05" (1/1) ... [2024-11-09 01:08:05,115 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:05" (1/1) ... [2024-11-09 01:08:05,148 INFO L138 Inliner]: procedures = 28, calls = 24, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 80 [2024-11-09 01:08:05,150 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 01:08:05,151 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 01:08:05,152 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 01:08:05,152 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 01:08:05,162 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:05" (1/1) ... [2024-11-09 01:08:05,163 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:05" (1/1) ... [2024-11-09 01:08:05,169 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:05" (1/1) ... [2024-11-09 01:08:05,172 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:05" (1/1) ... [2024-11-09 01:08:05,185 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:05" (1/1) ... [2024-11-09 01:08:05,192 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:05" (1/1) ... [2024-11-09 01:08:05,194 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:05" (1/1) ... [2024-11-09 01:08:05,199 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:05" (1/1) ... [2024-11-09 01:08:05,202 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 01:08:05,203 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 01:08:05,207 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 01:08:05,207 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 01:08:05,208 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 01:08:05" (1/1) ... [2024-11-09 01:08:05,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-09 01:08:05,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/z3 [2024-11-09 01:08:05,244 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-11-09 01:08:05,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-11-09 01:08:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 01:08:05,282 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2024-11-09 01:08:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure fp [2024-11-09 01:08:05,283 INFO L138 BoogieDeclarations]: Found implementation of procedure fp [2024-11-09 01:08:05,283 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-11-09 01:08:05,283 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-11-09 01:08:05,284 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 01:08:05,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 01:08:05,383 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 01:08:05,386 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 01:08:27,339 INFO L? ?]: Removed 27 outVars from TransFormulas that were not future-live. [2024-11-09 01:08:27,339 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 01:08:27,431 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 01:08:27,431 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 01:08:27,431 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:08:27 BoogieIcfgContainer [2024-11-09 01:08:27,432 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 01:08:27,432 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-11-09 01:08:27,434 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-11-09 01:08:27,444 INFO L274 PluginConnector]: CodeCheck initialized [2024-11-09 01:08:27,445 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 01:08:27" (1/1) ... [2024-11-09 01:08:27,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 01:08:27,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-09 01:08:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 27 states and 34 transitions. [2024-11-09 01:08:27,514 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-11-09 01:08:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2024-11-09 01:08:27,519 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-09 01:08:27,520 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 01:08:27,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 [2024-11-09 01:08:27,523 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 01:08:27,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-09 01:08:27,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:27,659 ERROR L567 CodeCheckObserver]: First Tracecheck threw exception Proofs are not supported [2024-11-09 01:08:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:27,700 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-09 01:08:27,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:08:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:08:28,713 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (2)] Ended with exit code 0 [2024-11-09 01:08:29,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-09 01:08:29,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 31 states and 42 transitions. [2024-11-09 01:08:29,533 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2024-11-09 01:08:29,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 01:08:29,535 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-09 01:08:29,535 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 01:08:29,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 [2024-11-09 01:08:29,538 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 01:08:29,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-09 01:08:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:29,594 ERROR L567 CodeCheckObserver]: First Tracecheck threw exception Proofs are not supported [2024-11-09 01:08:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:29,616 INFO L255 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 01:08:29,617 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:08:29,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:08:29,772 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-09 01:08:30,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-09 01:08:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 31 states and 40 transitions. [2024-11-09 01:08:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2024-11-09 01:08:30,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 01:08:30,060 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-09 01:08:30,060 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 01:08:30,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 [2024-11-09 01:08:30,063 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 01:08:30,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (4)] Waiting until timeout for monitored process [2024-11-09 01:08:30,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:30,292 ERROR L567 CodeCheckObserver]: First Tracecheck threw exception Proofs are not supported [2024-11-09 01:08:30,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:08:30,374 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 01:08:30,377 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:08:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:08:38,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (4)] Ended with exit code 0 [2024-11-09 01:09:01,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 9.82s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 01:09:13,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 01:09:25,889 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.75s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 01:09:29,308 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.42s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-11-09 01:09:29,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-09 01:09:29,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 35 states and 48 transitions. [2024-11-09 01:09:29,629 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 48 transitions. [2024-11-09 01:09:29,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-11-09 01:09:29,630 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-09 01:09:29,630 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 01:09:29,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 [2024-11-09 01:09:29,633 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 01:09:29,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2024-11-09 01:09:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:29,997 ERROR L567 CodeCheckObserver]: First Tracecheck threw exception Proofs are not supported [2024-11-09 01:09:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 01:09:30,427 INFO L255 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-09 01:09:30,429 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 01:10:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 01:10:52,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_389f4dd7-f5c6-479b-9aba-ddfbb3f7c806/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2024-11-09 01:12:13,839 WARN L286 SmtUtils]: Spent 14.49s on a formula simplification. DAG size of input: 51 DAG size of output: 48 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:12:37,429 WARN L286 SmtUtils]: Spent 7.74s on a formula simplification that was a NOOP. DAG size: 53 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:13:25,351 WARN L286 SmtUtils]: Spent 5.35s on a formula simplification that was a NOOP. DAG size: 49 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:13:48,719 WARN L286 SmtUtils]: Spent 12.67s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:13:58,772 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 10.05s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:14:10,242 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 10.16s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2024-11-09 01:14:22,086 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ sign_extend 24) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse0 ((_ sign_extend 24) |c_ULTIMATE.start_main1_~x~0#1|))) (and (not (= (_ bv0 32) ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse1))))) (let ((.cse2 (bvslt .cse0 (_ bv0 32)))) (or (and .cse2 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_24| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~a#1_24|))) (and (not (= (_ bv0 32) .cse3)) (= |c_ULTIMATE.start_gcd_test_~a#1| ((_ extract 7 0) (bvsrem ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse0))) .cse3))) (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse1))) (_ bv0 32)))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_24| (_ BitVec 8))) (let ((.cse4 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~a#1_24|))) (and (= ((_ extract 7 0) (bvsrem .cse0 .cse4)) |c_ULTIMATE.start_gcd_test_~a#1|) (not (= (_ bv0 32) .cse4)) (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse1))) (_ bv0 32))))) (not .cse2)))))) is different from false [2024-11-09 01:15:49,143 WARN L286 SmtUtils]: Spent 25.64s on a formula simplification. DAG size of input: 38 DAG size of output: 10 (called from [L 388] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-11-09 01:15:59,214 WARN L873 $PredicateComparison]: unable to prove that (not (let ((.cse1 ((_ sign_extend 24) |c_ULTIMATE.start_gcd_test_~a#1|)) (.cse0 ((_ sign_extend 24) |c_ULTIMATE.start_main1_~x~0#1|))) (and (not (= (_ bv0 32) ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse1))))) (let ((.cse2 (bvslt .cse0 (_ bv0 32)))) (or (and .cse2 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_24| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~a#1_24|))) (and (not (= (_ bv0 32) .cse3)) (= |c_ULTIMATE.start_gcd_test_~a#1| ((_ extract 7 0) (bvsrem ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse0))) .cse3))) (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse1))) (_ bv0 32)))))) (and (exists ((|v_ULTIMATE.start_gcd_test_~a#1_24| (_ BitVec 8))) (let ((.cse4 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~a#1_24|))) (and (= ((_ extract 7 0) (bvsrem .cse0 .cse4)) |c_ULTIMATE.start_gcd_test_~a#1|) (not (= (_ bv0 32) .cse4)) (= ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse1))) (_ bv0 32))))) (not .cse2))))))) is different from true [2024-11-09 01:16:09,390 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ sign_extend 24) |c_ULTIMATE.start_main1_~g~0#1|)) (.cse0 ((_ sign_extend 24) |c_ULTIMATE.start_main1_~x~0#1|))) (and (not (= (_ bv0 32) ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse0 .cse1))))) (let ((.cse2 (bvslt .cse0 (_ bv0 32)))) (or (and (not .cse2) (exists ((|v_ULTIMATE.start_gcd_test_~a#1_24| (_ BitVec 8))) (let ((.cse3 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~a#1_24|))) (and (not (= (_ bv0 32) .cse3)) (= (_ bv0 32) ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse3 .cse1)))) (= ((_ extract 7 0) (bvsrem .cse0 .cse3)) |c_ULTIMATE.start_main1_~g~0#1|))))) (and .cse2 (exists ((|v_ULTIMATE.start_gcd_test_~a#1_24| (_ BitVec 8))) (let ((.cse4 ((_ sign_extend 24) |v_ULTIMATE.start_gcd_test_~a#1_24|))) (and (= |c_ULTIMATE.start_main1_~g~0#1| ((_ extract 7 0) (bvsrem ((_ sign_extend 24) ((_ extract 7 0) (bvneg .cse0))) .cse4))) (not (= (_ bv0 32) .cse4)) (= (_ bv0 32) ((_ sign_extend 24) ((_ extract 7 0) (bvsrem .cse4 .cse1)))))))))))) is different from false