./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/termination-crafted-lit/Ben-Amram-LMCS2010-Ex2.3.c --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/config/TaipanReach.xml -i ../../sv-benchmarks/c/termination-crafted-lit/Ben-Amram-LMCS2010-Ex2.3.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 9ec0bf4392c8fe4647c82e62efb5bebaadd0d7bdbc2edef80a3ce856001f6a7d ............................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-24 10:50:56,090 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-24 10:50:56,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-24 10:50:56,159 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-24 10:50:56,160 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-24 10:50:56,162 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-24 10:50:56,164 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-24 10:50:56,168 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-24 10:50:56,171 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-24 10:50:56,173 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-24 10:50:56,175 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-24 10:50:56,177 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-24 10:50:56,178 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-24 10:50:56,180 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-24 10:50:56,182 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-24 10:50:56,184 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-24 10:50:56,186 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-24 10:50:56,188 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-24 10:50:56,191 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-24 10:50:56,195 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-24 10:50:56,198 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-24 10:50:56,201 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-24 10:50:56,203 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-24 10:50:56,205 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-24 10:50:56,210 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-24 10:50:56,211 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-24 10:50:56,212 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-24 10:50:56,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-24 10:50:56,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-24 10:50:56,216 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-24 10:50:56,217 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-24 10:50:56,218 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-24 10:50:56,226 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-24 10:50:56,227 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-24 10:50:56,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-24 10:50:56,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-24 10:50:56,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-24 10:50:56,233 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-24 10:50:56,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-24 10:50:56,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-24 10:50:56,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-24 10:50:56,239 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-10-24 10:50:56,293 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-24 10:50:56,307 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-24 10:50:56,308 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-24 10:50:56,310 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-24 10:50:56,310 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-24 10:50:56,311 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-24 10:50:56,311 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-24 10:50:56,311 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-24 10:50:56,312 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-24 10:50:56,312 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-24 10:50:56,317 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-24 10:50:56,318 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-24 10:50:56,318 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-24 10:50:56,319 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-24 10:50:56,319 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-24 10:50:56,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-24 10:50:56,320 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-24 10:50:56,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-24 10:50:56,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-24 10:50:56,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-24 10:50:56,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-24 10:50:56,322 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-24 10:50:56,322 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-10-24 10:50:56,322 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-24 10:50:56,322 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-24 10:50:56,323 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-24 10:50:56,323 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-24 10:50:56,323 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-24 10:50:56,324 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:50:56,326 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-24 10:50:56,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-24 10:50:56,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-24 10:50:56,328 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-24 10:50:56,328 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-24 10:50:56,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-24 10:50:56,329 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-24 10:50:56,329 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-24 10:50:56,329 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ec0bf4392c8fe4647c82e62efb5bebaadd0d7bdbc2edef80a3ce856001f6a7d [2021-10-24 10:50:56,672 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-24 10:50:56,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-24 10:50:56,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-24 10:50:56,720 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-24 10:50:56,721 INFO L275 PluginConnector]: CDTParser initialized [2021-10-24 10:50:56,723 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/../../sv-benchmarks/c/termination-crafted-lit/Ben-Amram-LMCS2010-Ex2.3.c [2021-10-24 10:50:56,809 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/data/1f90bf980/90efe5b28bb343bda5bdddec2509b472/FLAG5c4803ea2 [2021-10-24 10:50:57,389 INFO L306 CDTParser]: Found 1 translation units. [2021-10-24 10:50:57,389 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/sv-benchmarks/c/termination-crafted-lit/Ben-Amram-LMCS2010-Ex2.3.c [2021-10-24 10:50:57,406 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/data/1f90bf980/90efe5b28bb343bda5bdddec2509b472/FLAG5c4803ea2 [2021-10-24 10:50:57,750 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/data/1f90bf980/90efe5b28bb343bda5bdddec2509b472 [2021-10-24 10:50:57,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-24 10:50:57,756 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-24 10:50:57,760 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-24 10:50:57,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-24 10:50:57,765 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-24 10:50:57,766 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:50:57" (1/1) ... [2021-10-24 10:50:57,768 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7437cbc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:50:57, skipping insertion in model container [2021-10-24 10:50:57,768 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 10:50:57" (1/1) ... [2021-10-24 10:50:57,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-24 10:50:57,793 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-24 10:50:57,983 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:50:58,012 INFO L203 MainTranslator]: Completed pre-run [2021-10-24 10:50:58,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-24 10:50:58,045 INFO L208 MainTranslator]: Completed translation [2021-10-24 10:50:58,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:50:58 WrapperNode [2021-10-24 10:50:58,046 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-24 10:50:58,047 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-24 10:50:58,048 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-24 10:50:58,048 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-24 10:50:58,058 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:50:58" (1/1) ... [2021-10-24 10:50:58,064 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:50:58" (1/1) ... [2021-10-24 10:50:58,087 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-24 10:50:58,088 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-24 10:50:58,089 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-24 10:50:58,089 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-24 10:50:58,099 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:50:58" (1/1) ... [2021-10-24 10:50:58,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:50:58" (1/1) ... [2021-10-24 10:50:58,101 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:50:58" (1/1) ... [2021-10-24 10:50:58,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:50:58" (1/1) ... [2021-10-24 10:50:58,104 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:50:58" (1/1) ... [2021-10-24 10:50:58,109 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:50:58" (1/1) ... [2021-10-24 10:50:58,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:50:58" (1/1) ... [2021-10-24 10:50:58,112 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-24 10:50:58,113 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-24 10:50:58,114 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-24 10:50:58,114 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-24 10:50:58,115 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:50:58" (1/1) ... [2021-10-24 10:50:58,125 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-24 10:50:58,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/z3 [2021-10-24 10:50:58,157 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-24 10:50:58,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-24 10:50:58,216 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-24 10:50:58,216 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-24 10:50:58,438 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-24 10:50:58,438 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-24 10:50:58,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:50:58 BoogieIcfgContainer [2021-10-24 10:50:58,441 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-24 10:50:58,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-24 10:50:58,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-24 10:50:58,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-24 10:50:58,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 10:50:57" (1/3) ... [2021-10-24 10:50:58,450 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708cc112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:50:58, skipping insertion in model container [2021-10-24 10:50:58,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 10:50:58" (2/3) ... [2021-10-24 10:50:58,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@708cc112 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 10:50:58, skipping insertion in model container [2021-10-24 10:50:58,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:50:58" (3/3) ... [2021-10-24 10:50:58,453 INFO L111 eAbstractionObserver]: Analyzing ICFG Ben-Amram-LMCS2010-Ex2.3.c [2021-10-24 10:50:58,459 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-24 10:50:58,459 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-24 10:50:58,511 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-24 10:50:58,520 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-24 10:50:58,520 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-24 10:50:58,538 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:50:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-24 10:50:58,545 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:50:58,545 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-24 10:50:58,546 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-24 10:50:58,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:50:58,556 INFO L82 PathProgramCache]: Analyzing trace with hash 963531, now seen corresponding path program 1 times [2021-10-24 10:50:58,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:50:58,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011266584] [2021-10-24 10:50:58,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:50:58,568 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:50:58,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:50:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:50:58,747 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:50:58,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011266584] [2021-10-24 10:50:58,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011266584] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:50:58,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:50:58,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-24 10:50:58,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390688542] [2021-10-24 10:50:58,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:50:58,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:50:58,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:50:58,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:50:58,778 INFO L87 Difference]: Start difference. First operand has 16 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:50:58,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:50:58,836 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-10-24 10:50:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:50:58,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-24 10:50:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:50:58,849 INFO L225 Difference]: With dead ends: 30 [2021-10-24 10:50:58,849 INFO L226 Difference]: Without dead ends: 27 [2021-10-24 10:50:58,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:50:58,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-24 10:50:58,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-10-24 10:50:58,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:50:58,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-10-24 10:50:58,909 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 4 [2021-10-24 10:50:58,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:50:58,909 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-10-24 10:50:58,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:50:58,910 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-10-24 10:50:58,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-24 10:50:58,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:50:58,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-24 10:50:58,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-24 10:50:58,912 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-24 10:50:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:50:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash 963339, now seen corresponding path program 1 times [2021-10-24 10:50:58,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:50:58,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038083774] [2021-10-24 10:50:58,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:50:58,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:50:58,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:50:58,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:50:58,972 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:50:58,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038083774] [2021-10-24 10:50:58,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038083774] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:50:58,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:50:58,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:50:58,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081153811] [2021-10-24 10:50:58,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:50:58,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:50:58,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:50:58,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:50:58,978 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:50:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:50:59,026 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-10-24 10:50:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:50:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-24 10:50:59,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:50:59,028 INFO L225 Difference]: With dead ends: 21 [2021-10-24 10:50:59,028 INFO L226 Difference]: Without dead ends: 19 [2021-10-24 10:50:59,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:50:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-24 10:50:59,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-24 10:50:59,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:50:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-24 10:50:59,035 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 4 [2021-10-24 10:50:59,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:50:59,036 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-24 10:50:59,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:50:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-24 10:50:59,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 10:50:59,037 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:50:59,037 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 10:50:59,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-24 10:50:59,038 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-24 10:50:59,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:50:59,039 INFO L82 PathProgramCache]: Analyzing trace with hash 29869514, now seen corresponding path program 1 times [2021-10-24 10:50:59,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:50:59,040 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616027592] [2021-10-24 10:50:59,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:50:59,040 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:50:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-24 10:50:59,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-24 10:50:59,092 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-24 10:50:59,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616027592] [2021-10-24 10:50:59,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616027592] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-24 10:50:59,093 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-24 10:50:59,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-24 10:50:59,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41518573] [2021-10-24 10:50:59,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-24 10:50:59,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-24 10:50:59,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-24 10:50:59,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:50:59,097 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:50:59,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-24 10:50:59,114 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-10-24 10:50:59,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-24 10:50:59,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-24 10:50:59,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-24 10:50:59,132 INFO L225 Difference]: With dead ends: 19 [2021-10-24 10:50:59,132 INFO L226 Difference]: Without dead ends: 18 [2021-10-24 10:50:59,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-24 10:50:59,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-24 10:50:59,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-24 10:50:59,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.4) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:50:59,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-10-24 10:50:59,139 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 5 [2021-10-24 10:50:59,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-24 10:50:59,139 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-10-24 10:50:59,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-24 10:50:59,140 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-10-24 10:50:59,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-24 10:50:59,141 INFO L504 BasicCegarLoop]: Found error trace [2021-10-24 10:50:59,141 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-24 10:50:59,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-24 10:50:59,142 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW === [ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW, ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 3 more)] === [2021-10-24 10:50:59,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-24 10:50:59,143 INFO L82 PathProgramCache]: Analyzing trace with hash 29863556, now seen corresponding path program 1 times [2021-10-24 10:50:59,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-24 10:50:59,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640856644] [2021-10-24 10:50:59,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-24 10:50:59,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-24 10:50:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:50:59,164 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-24 10:50:59,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-24 10:50:59,199 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-24 10:50:59,199 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-24 10:50:59,201 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:50:59,203 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:50:59,203 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:50:59,204 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:50:59,204 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:50:59,205 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW [2021-10-24 10:50:59,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-24 10:50:59,213 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-24 10:50:59,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 10:50:59 BoogieIcfgContainer [2021-10-24 10:50:59,245 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-24 10:50:59,246 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-24 10:50:59,246 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-24 10:50:59,247 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-24 10:50:59,247 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 10:50:58" (3/4) ... [2021-10-24 10:50:59,250 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-24 10:50:59,290 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/witness.graphml [2021-10-24 10:50:59,290 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-24 10:50:59,293 INFO L168 Benchmark]: Toolchain (without parser) took 1536.00 ms. Allocated memory was 102.8 MB in the beginning and 132.1 MB in the end (delta: 29.4 MB). Free memory was 70.2 MB in the beginning and 65.3 MB in the end (delta: 4.8 MB). Peak memory consumption was 32.5 MB. Max. memory is 16.1 GB. [2021-10-24 10:50:59,293 INFO L168 Benchmark]: CDTParser took 0.39 ms. Allocated memory is still 102.8 MB. Free memory is still 57.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:50:59,294 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.98 ms. Allocated memory was 102.8 MB in the beginning and 132.1 MB in the end (delta: 29.4 MB). Free memory was 70.1 MB in the beginning and 108.4 MB in the end (delta: -38.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:50:59,295 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.11 ms. Allocated memory is still 132.1 MB. Free memory was 107.8 MB in the beginning and 106.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-24 10:50:59,296 INFO L168 Benchmark]: Boogie Preprocessor took 24.14 ms. Allocated memory is still 132.1 MB. Free memory was 106.8 MB in the beginning and 105.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:50:59,297 INFO L168 Benchmark]: RCFGBuilder took 327.37 ms. Allocated memory is still 132.1 MB. Free memory was 105.7 MB in the beginning and 96.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-24 10:50:59,297 INFO L168 Benchmark]: TraceAbstraction took 802.09 ms. Allocated memory is still 132.1 MB. Free memory was 95.8 MB in the beginning and 67.0 MB in the end (delta: 28.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. [2021-10-24 10:50:59,298 INFO L168 Benchmark]: Witness Printer took 44.40 ms. Allocated memory is still 132.1 MB. Free memory was 67.0 MB in the beginning and 65.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-24 10:50:59,302 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.39 ms. Allocated memory is still 102.8 MB. Free memory is still 57.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 285.98 ms. Allocated memory was 102.8 MB in the beginning and 132.1 MB in the end (delta: 29.4 MB). Free memory was 70.1 MB in the beginning and 108.4 MB in the end (delta: -38.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.11 ms. Allocated memory is still 132.1 MB. Free memory was 107.8 MB in the beginning and 106.8 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.14 ms. Allocated memory is still 132.1 MB. Free memory was 106.8 MB in the beginning and 105.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 327.37 ms. Allocated memory is still 132.1 MB. Free memory was 105.7 MB in the beginning and 96.3 MB in the end (delta: 9.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 802.09 ms. Allocated memory is still 132.1 MB. Free memory was 95.8 MB in the beginning and 67.0 MB in the end (delta: 28.8 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.1 GB. * Witness Printer took 44.40 ms. Allocated memory is still 132.1 MB. Free memory was 67.0 MB in the beginning and 65.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 24]: integer overflow possible integer overflow possible We found a FailurePath: [L15] int x, y, z; [L16] x = __VERIFIER_nondet_int() [L17] y = __VERIFIER_nondet_int() [L18] z = __VERIFIER_nondet_int() [L20] COND TRUE x > 0 && y > 0 && z > 0 [L21] COND TRUE y > x [L22] y = z [L23] x = __VERIFIER_nondet_int() [L24] x - 1 - UnprovableResult [Line: 24]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 26]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 28]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - UnprovableResult [Line: 28]: Unable to prove that integer overflow can never occur Unable to prove that integer overflow can never occur Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 16 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 702.2ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 13.1ms, AutomataDifference: 186.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 13.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 25 SDtfs, 26 SDslu, 11 SDs, 0 SdLazy, 29 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 72.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=1, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 33.0ms AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 10.0ms SsaConstructionTime, 69.7ms SatisfiabilityAnalysisTime, 138.1ms InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 10 ConstructedInterpolants, 0 QuantifiedInterpolants, 24 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-24 10:50:59,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d6c74793-00e7-4e76-b3fc-98ffaef424d6/bin/utaipan-9zjyvhn0QE/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...