./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fscanf_multiply_10_bad.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows 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_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/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_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fscanf_multiply_10_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/config/svcomp-Overflow-64bit-Kojak_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk --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 64bit --witnessprinter.graph.data.programhash 6158fe8773ea03fd03dc663732c4a477eedc96154ad42c6b208b3197f1a4a25b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 00:36:19,600 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 00:36:19,696 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/config/svcomp-Overflow-64bit-Kojak_Default.epf [2024-11-09 00:36:19,701 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 00:36:19,702 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck.Interpolating solver [2024-11-09 00:36:19,743 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 00:36:19,743 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 00:36:19,744 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-11-09 00:36:19,745 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 00:36:19,745 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 00:36:19,746 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 00:36:19,746 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 00:36:19,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 00:36:19,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 00:36:19,747 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 00:36:19,748 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 00:36:19,748 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 00:36:19,749 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 00:36:19,749 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-09 00:36:19,749 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 00:36:19,750 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 00:36:19,750 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 00:36:19,751 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-11-09 00:36:19,751 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-11-09 00:36:19,752 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-11-09 00:36:19,752 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 00:36:19,753 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-09 00:36:19,753 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 00:36:19,753 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 00:36:19,754 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 00:36:19,754 INFO L153 SettingsManager]: * Trace refinement strategy=PENGUIN [2024-11-09 00:36:19,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 00:36:19,766 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_641a8d16-35d8-417c-8c12-0937d8261e07/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6158fe8773ea03fd03dc663732c4a477eedc96154ad42c6b208b3197f1a4a25b [2024-11-09 00:36:20,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 00:36:20,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 00:36:20,102 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 00:36:20,103 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 00:36:20,104 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 00:36:20,105 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fscanf_multiply_10_bad.i Unable to find full path for "g++" [2024-11-09 00:36:22,051 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 00:36:22,459 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 00:36:22,460 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fscanf_multiply_10_bad.i [2024-11-09 00:36:22,507 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/data/362543fc5/1d446e6a3f0240dfb163de6b7b8f2863/FLAGe368bd899 [2024-11-09 00:36:22,640 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/data/362543fc5/1d446e6a3f0240dfb163de6b7b8f2863 [2024-11-09 00:36:22,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 00:36:22,643 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 00:36:22,645 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 00:36:22,645 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 00:36:22,650 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 00:36:22,650 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 12:36:22" (1/1) ... [2024-11-09 00:36:22,651 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58472d27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:22, skipping insertion in model container [2024-11-09 00:36:22,652 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 12:36:22" (1/1) ... [2024-11-09 00:36:22,739 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 00:36:23,713 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 00:36:23,728 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 00:36:23,857 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 00:36:23,994 INFO L204 MainTranslator]: Completed translation [2024-11-09 00:36:23,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:23 WrapperNode [2024-11-09 00:36:23,995 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 00:36:23,996 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 00:36:23,996 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 00:36:23,996 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 00:36:24,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:23" (1/1) ... [2024-11-09 00:36:24,024 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:23" (1/1) ... [2024-11-09 00:36:24,051 INFO L138 Inliner]: procedures = 497, calls = 23, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 45 [2024-11-09 00:36:24,052 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 00:36:24,052 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 00:36:24,052 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 00:36:24,053 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 00:36:24,063 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:23" (1/1) ... [2024-11-09 00:36:24,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:23" (1/1) ... [2024-11-09 00:36:24,065 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:23" (1/1) ... [2024-11-09 00:36:24,065 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:23" (1/1) ... [2024-11-09 00:36:24,075 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:23" (1/1) ... [2024-11-09 00:36:24,077 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:23" (1/1) ... [2024-11-09 00:36:24,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:23" (1/1) ... [2024-11-09 00:36:24,083 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:23" (1/1) ... [2024-11-09 00:36:24,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 00:36:24,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 00:36:24,090 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 00:36:24,090 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 00:36:24,091 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:23" (1/1) ... [2024-11-09 00:36:24,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-09 00:36:24,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/z3 [2024-11-09 00:36:24,139 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-11-09 00:36:24,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-11-09 00:36:24,174 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2024-11-09 00:36:24,174 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2024-11-09 00:36:24,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 00:36:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 00:36:24,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 00:36:24,375 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 00:36:24,378 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 00:36:24,526 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-11-09 00:36:24,526 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 00:36:24,582 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 00:36:24,582 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 00:36:24,583 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 12:36:24 BoogieIcfgContainer [2024-11-09 00:36:24,583 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 00:36:24,583 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-11-09 00:36:24,584 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-11-09 00:36:24,595 INFO L274 PluginConnector]: CodeCheck initialized [2024-11-09 00:36:24,595 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 12:36:24" (1/1) ... [2024-11-09 00:36:24,610 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 00:36:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-09 00:36:24,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 15 states and 17 transitions. [2024-11-09 00:36:24,664 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-09 00:36:24,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 00:36:24,669 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-09 00:36:24,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 00:36:24,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 00:36:24,934 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 00:36:24,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-09 00:36:24,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 14 states and 16 transitions. [2024-11-09 00:36:24,975 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-09 00:36:24,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 00:36:24,976 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-09 00:36:24,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 00:36:25,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 00:36:25,011 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 00:36:25,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 00:36:25,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 00:36:25,116 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 00:36:25,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 00:36:25,157 WARN L473 CodeCheckObserver]: This program is UNSAFE, Check terminated with 2 iterations. [2024-11-09 00:36:25,185 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 09.11 12:36:25 ImpRootNode [2024-11-09 00:36:25,186 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2024-11-09 00:36:25,186 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 00:36:25,187 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 00:36:25,187 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 00:36:25,188 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 12:36:24" (3/4) ... [2024-11-09 00:36:25,190 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-09 00:36:25,191 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 00:36:25,192 INFO L158 Benchmark]: Toolchain (without parser) took 2548.57ms. Allocated memory is still 159.4MB. Free memory was 127.6MB in the beginning and 80.3MB in the end (delta: 47.3MB). Peak memory consumption was 49.8MB. Max. memory is 16.1GB. [2024-11-09 00:36:25,193 INFO L158 Benchmark]: CDTParser took 0.34ms. Allocated memory is still 127.9MB. Free memory is still 101.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 00:36:25,194 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1350.30ms. Allocated memory is still 159.4MB. Free memory was 127.6MB in the beginning and 122.1MB in the end (delta: 5.5MB). Peak memory consumption was 72.9MB. Max. memory is 16.1GB. [2024-11-09 00:36:25,194 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.00ms. Allocated memory is still 159.4MB. Free memory was 122.1MB in the beginning and 119.0MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 00:36:25,195 INFO L158 Benchmark]: Boogie Preprocessor took 37.26ms. Allocated memory is still 159.4MB. Free memory was 119.0MB in the beginning and 118.0MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 00:36:25,196 INFO L158 Benchmark]: RCFGBuilder took 492.66ms. Allocated memory is still 159.4MB. Free memory was 118.0MB in the beginning and 103.3MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-11-09 00:36:25,196 INFO L158 Benchmark]: CodeCheck took 602.26ms. Allocated memory is still 159.4MB. Free memory was 103.3MB in the beginning and 80.3MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2024-11-09 00:36:25,197 INFO L158 Benchmark]: Witness Printer took 5.00ms. Allocated memory is still 159.4MB. Free memory is still 80.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 00:36:25,200 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 2 procedures, 15 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.5s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7 IncrementalHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 8 mSDtfsCounter, 7 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 49 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 9 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - UnprovableResult [Line: 1560]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of large string literal at line 1568. Possible FailurePath: [L1522] const int GLOBAL_CONST_TRUE = 1; [L1523] const int GLOBAL_CONST_FALSE = 0; [L1524] const int GLOBAL_CONST_FIVE = 5; [L1525] int globalTrue = 1; [L1526] int globalFalse = 0; [L1527] int globalFive = 5; [L1546] int globalArgc = 0; [L1547] char** globalArgv = ((void *)0); [L1568] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(line)={1:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1414] COND TRUE line != ((void *)0) [L1568] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1569] CALL CWE190_Integer_Overflow__int_fscanf_multiply_10_bad() [L1550] int data; [L1551] data = 0 [L1552] COND TRUE \read(globalTrue) [L1556] COND TRUE \read(globalTrue) VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=1073741824, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1558] COND TRUE data > 0 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=1073741824, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1560] data * 2 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.34ms. Allocated memory is still 127.9MB. Free memory is still 101.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1350.30ms. Allocated memory is still 159.4MB. Free memory was 127.6MB in the beginning and 122.1MB in the end (delta: 5.5MB). Peak memory consumption was 72.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.00ms. Allocated memory is still 159.4MB. Free memory was 122.1MB in the beginning and 119.0MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 37.26ms. Allocated memory is still 159.4MB. Free memory was 119.0MB in the beginning and 118.0MB in the end (delta: 1.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 492.66ms. Allocated memory is still 159.4MB. Free memory was 118.0MB in the beginning and 103.3MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * CodeCheck took 602.26ms. Allocated memory is still 159.4MB. Free memory was 103.3MB in the beginning and 80.3MB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Witness Printer took 5.00ms. Allocated memory is still 159.4MB. Free memory is still 80.3MB. There was no memory consumed. Max. memory is 16.1GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-09 00:36:25,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Ended with exit code 0 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_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/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_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/config/KojakReach.xml -i ../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fscanf_multiply_10_bad.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/config/svcomp-Overflow-64bit-Kojak_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk --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 64bit --witnessprinter.graph.data.programhash 6158fe8773ea03fd03dc663732c4a477eedc96154ad42c6b208b3197f1a4a25b --- Real Ultimate output --- This is Ultimate 0.2.5-dev-a016563 [2024-11-09 00:36:27,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 00:36:27,800 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/config/svcomp-Overflow-64bit-Kojak_Bitvector.epf [2024-11-09 00:36:27,860 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 00:36:27,862 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 00:36:27,863 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ALWAYS [2024-11-09 00:36:27,864 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 00:36:27,864 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 00:36:27,865 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 00:36:27,867 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-09 00:36:27,867 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 00:36:27,867 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-09 00:36:27,868 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 00:36:27,868 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-09 00:36:27,869 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 00:36:27,869 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-11-09 00:36:27,869 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 00:36:27,870 INFO L153 SettingsManager]: * Check absence of signed integer overflows=ASSERTandASSUME [2024-11-09 00:36:27,870 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-11-09 00:36:27,873 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 00:36:27,876 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-09 00:36:27,877 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 00:36:27,877 INFO L151 SettingsManager]: Preferences of CodeCheck differ from their defaults: [2024-11-09 00:36:27,878 INFO L153 SettingsManager]: * Timeout in seconds=1000000 [2024-11-09 00:36:27,878 INFO L153 SettingsManager]: * Theory for external solver=ALL [2024-11-09 00:36:27,878 INFO L153 SettingsManager]: * Command for calling external solver=cvc4 --incremental --print-success --lang smt [2024-11-09 00:36:27,879 INFO L153 SettingsManager]: * Choose which separate solver to use for tracechecks=External_ModelsAndUnsatCoreMode [2024-11-09 00:36:27,879 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 00:36:27,879 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-09 00:36:27,881 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 00:36:27,882 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 00:36:27,882 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-09 00:36:27,883 INFO L153 SettingsManager]: * Trace refinement strategy=WALRUS [2024-11-09 00:36:27,883 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-11-09 00:36:27,884 INFO L153 SettingsManager]: * Use separate solver for trace checks=false [2024-11-09 00:36:27,884 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_641a8d16-35d8-417c-8c12-0937d8261e07/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Kojak Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6158fe8773ea03fd03dc663732c4a477eedc96154ad42c6b208b3197f1a4a25b [2024-11-09 00:36:28,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 00:36:28,333 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 00:36:28,336 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 00:36:28,337 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 00:36:28,339 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 00:36:28,341 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/../../sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fscanf_multiply_10_bad.i Unable to find full path for "g++" [2024-11-09 00:36:30,414 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 00:36:30,879 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 00:36:30,880 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/sv-benchmarks/c/Juliet_Test/CWE190_Integer_Overflow__int_fscanf_multiply_10_bad.i [2024-11-09 00:36:30,913 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/data/e423a6cb5/0e6b8cd1b8c944b7a5fa4ac9c8baa69c/FLAG08dba5eac [2024-11-09 00:36:30,938 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/data/e423a6cb5/0e6b8cd1b8c944b7a5fa4ac9c8baa69c [2024-11-09 00:36:30,941 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 00:36:30,944 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 00:36:30,946 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 00:36:30,946 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 00:36:30,953 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 00:36:30,954 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 12:36:30" (1/1) ... [2024-11-09 00:36:30,958 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@296e352e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:30, skipping insertion in model container [2024-11-09 00:36:30,958 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 12:36:30" (1/1) ... [2024-11-09 00:36:31,038 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 00:36:32,365 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 00:36:32,379 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 00:36:32,507 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 00:36:32,701 INFO L204 MainTranslator]: Completed translation [2024-11-09 00:36:32,702 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:32 WrapperNode [2024-11-09 00:36:32,702 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 00:36:32,703 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 00:36:32,704 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 00:36:32,704 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 00:36:32,712 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:32" (1/1) ... [2024-11-09 00:36:32,740 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:32" (1/1) ... [2024-11-09 00:36:32,762 INFO L138 Inliner]: procedures = 502, calls = 23, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 44 [2024-11-09 00:36:32,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 00:36:32,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 00:36:32,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 00:36:32,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 00:36:32,775 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:32" (1/1) ... [2024-11-09 00:36:32,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:32" (1/1) ... [2024-11-09 00:36:32,779 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:32" (1/1) ... [2024-11-09 00:36:32,779 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:32" (1/1) ... [2024-11-09 00:36:32,795 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:32" (1/1) ... [2024-11-09 00:36:32,801 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:32" (1/1) ... [2024-11-09 00:36:32,803 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:32" (1/1) ... [2024-11-09 00:36:32,805 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:32" (1/1) ... [2024-11-09 00:36:32,808 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 00:36:32,809 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 00:36:32,809 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 00:36:32,810 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 00:36:32,810 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 12:36:32" (1/1) ... [2024-11-09 00:36:32,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 [2024-11-09 00:36:32,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/z3 [2024-11-09 00:36:32,855 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (exit command is (exit), workingDir is null) [2024-11-09 00:36:32,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Waiting until timeout for monitored process [2024-11-09 00:36:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure printLine [2024-11-09 00:36:32,886 INFO L138 BoogieDeclarations]: Found implementation of procedure printLine [2024-11-09 00:36:32,886 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 00:36:32,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 00:36:32,887 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 00:36:33,048 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 00:36:33,050 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 00:36:33,201 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-11-09 00:36:33,201 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 00:36:33,297 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 00:36:33,297 INFO L316 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-09 00:36:33,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 12:36:33 BoogieIcfgContainer [2024-11-09 00:36:33,298 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 00:36:33,298 INFO L112 PluginConnector]: ------------------------CodeCheck---------------------------- [2024-11-09 00:36:33,299 INFO L270 PluginConnector]: Initializing CodeCheck... [2024-11-09 00:36:33,313 INFO L274 PluginConnector]: CodeCheck initialized [2024-11-09 00:36:33,314 INFO L184 PluginConnector]: Executing the observer CodeCheckObserver from plugin CodeCheck for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 12:36:33" (1/1) ... [2024-11-09 00:36:33,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 00:36:33,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-09 00:36:33,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 15 states and 17 transitions. [2024-11-09 00:36:33,387 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-11-09 00:36:33,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2024-11-09 00:36:33,392 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-09 00:36:33,393 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 00:36:33,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/cvc4 [2024-11-09 00:36:33,396 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 00:36:33,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (2)] Waiting until timeout for monitored process [2024-11-09 00:36:33,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 00:36:33,580 ERROR L567 CodeCheckObserver]: First Tracecheck threw exception Proofs are not supported [2024-11-09 00:36:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 00:36:33,611 INFO L255 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-11-09 00:36:33,619 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 00:36:33,672 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 00:36:33,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (2)] Forceful destruction successful, exit code 0 [2024-11-09 00:36:33,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand no size info available [2024-11-09 00:36:33,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 14 states and 16 transitions. [2024-11-09 00:36:33,736 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-11-09 00:36:33,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-09 00:36:33,740 INFO L420 CodeCheckObserver]: Error Path is FOUND. [2024-11-09 00:36:33,741 INFO L173 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2024-11-09 00:36:33,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/cvc4 [2024-11-09 00:36:33,744 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2024-11-09 00:36:33,747 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2024-11-09 00:36:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 00:36:33,903 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 00:36:33,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 00:36:34,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 00:36:34,040 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-11-09 00:36:34,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-11-09 00:36:34,078 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/cvc4 --incremental --print-success --lang smt (3)] Ended with exit code 0 [2024-11-09 00:36:34,079 WARN L473 CodeCheckObserver]: This program is UNSAFE, Check terminated with 2 iterations. [2024-11-09 00:36:34,123 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck CFG 09.11 12:36:34 ImpRootNode [2024-11-09 00:36:34,123 INFO L131 PluginConnector]: ------------------------ END CodeCheck---------------------------- [2024-11-09 00:36:34,124 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-11-09 00:36:34,125 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-11-09 00:36:34,125 INFO L274 PluginConnector]: Witness Printer initialized [2024-11-09 00:36:34,126 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 12:36:33" (3/4) ... [2024-11-09 00:36:34,129 INFO L145 WitnessPrinter]: No result that supports witness generation found [2024-11-09 00:36:34,130 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-11-09 00:36:34,132 INFO L158 Benchmark]: Toolchain (without parser) took 3187.04ms. Allocated memory was 73.4MB in the beginning and 117.4MB in the end (delta: 44.0MB). Free memory was 45.7MB in the beginning and 82.5MB in the end (delta: -36.7MB). Peak memory consumption was 12.7MB. Max. memory is 16.1GB. [2024-11-09 00:36:34,133 INFO L158 Benchmark]: CDTParser took 0.51ms. Allocated memory is still 73.4MB. Free memory was 48.9MB in the beginning and 48.9MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 00:36:34,134 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1757.03ms. Allocated memory was 73.4MB in the beginning and 92.3MB in the end (delta: 18.9MB). Free memory was 45.4MB in the beginning and 54.6MB in the end (delta: -9.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. [2024-11-09 00:36:34,135 INFO L158 Benchmark]: Boogie Procedure Inliner took 61.23ms. Allocated memory is still 92.3MB. Free memory was 54.6MB in the beginning and 51.6MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-11-09 00:36:34,137 INFO L158 Benchmark]: Boogie Preprocessor took 43.43ms. Allocated memory is still 92.3MB. Free memory was 51.6MB in the beginning and 49.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-11-09 00:36:34,138 INFO L158 Benchmark]: RCFGBuilder took 488.57ms. Allocated memory is still 92.3MB. Free memory was 49.4MB in the beginning and 55.4MB in the end (delta: -5.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-11-09 00:36:34,139 INFO L158 Benchmark]: CodeCheck took 825.19ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 55.4MB in the beginning and 82.5MB in the end (delta: -27.1MB). There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 00:36:34,140 INFO L158 Benchmark]: Witness Printer took 6.18ms. Allocated memory is still 117.4MB. Free memory is still 82.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-11-09 00:36:34,145 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.codecheck: - StatisticsResult: Ultimate CodeCheck benchmark data CFG has 2 procedures, 15 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 0, PathProgramHistogramMax: 0, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 17 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 8 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 2 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7 IncrementalHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 2 mSolverCounterUnsat, 8 mSDtfsCounter, 7 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=-1occurred in iteration=-1, InterpolantAutomatonStates: 0, traceCheckStatistics: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 17 NumberOfCodeBlocks, 17 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 7 ConstructedInterpolants, 0 QuantifiedInterpolants, 9 SizeOfPredicates, 0 NumberOfNonLiveVariables, 30 ConjunctsInSsa, 2 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: No data available, ReuseStatistics: No data available - UnprovableResult [Line: 1560]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: overapproximation of large string literal at line 1568. Possible FailurePath: [L1522] const int GLOBAL_CONST_TRUE = 1; [L1523] const int GLOBAL_CONST_FALSE = 0; [L1524] const int GLOBAL_CONST_FIVE = 5; [L1525] int globalTrue = 1; [L1526] int globalFalse = 0; [L1527] int globalFive = 5; [L1546] int globalArgc = 0; [L1547] char** globalArgv = ((void *)0); [L1568] CALL printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, \old(line)={1:0}, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1414] COND TRUE line != ((void *)0) [L1568] RET printLine("Calling bad()...") VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1569] CALL CWE190_Integer_Overflow__int_fscanf_multiply_10_bad() [L1550] int data; [L1551] data = 0 [L1552] COND TRUE \read(globalTrue) [L1556] COND TRUE \read(globalTrue) VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=1073741825, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1558] COND TRUE data > 0 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, data=1073741825, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] [L1560] data * 2 VAL [GLOBAL_CONST_FALSE=0, GLOBAL_CONST_FIVE=5, GLOBAL_CONST_TRUE=1, globalArgc=0, globalArgv={0:0}, globalFalse=0, globalFive=5, globalTrue=1] * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.51ms. Allocated memory is still 73.4MB. Free memory was 48.9MB in the beginning and 48.9MB in the end (delta: 84.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1757.03ms. Allocated memory was 73.4MB in the beginning and 92.3MB in the end (delta: 18.9MB). Free memory was 45.4MB in the beginning and 54.6MB in the end (delta: -9.2MB). Peak memory consumption was 27.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 61.23ms. Allocated memory is still 92.3MB. Free memory was 54.6MB in the beginning and 51.6MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.43ms. Allocated memory is still 92.3MB. Free memory was 51.6MB in the beginning and 49.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 488.57ms. Allocated memory is still 92.3MB. Free memory was 49.4MB in the beginning and 55.4MB in the end (delta: -5.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * CodeCheck took 825.19ms. Allocated memory was 92.3MB in the beginning and 117.4MB in the end (delta: 25.2MB). Free memory was 55.4MB in the beginning and 82.5MB in the end (delta: -27.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 6.18ms. Allocated memory is still 117.4MB. Free memory is still 82.5MB. There was no memory consumed. Max. memory is 16.1GB. RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2024-11-09 00:36:34,191 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_641a8d16-35d8-417c-8c12-0937d8261e07/bin/ukojak-verify-ImItNfHLgk/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:10000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample