./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 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/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_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/config/svcomp-Overflow-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs --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 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:17:18,111 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:17:18,113 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:17:18,177 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:17:18,179 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:17:18,185 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:17:18,188 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:17:18,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:17:18,197 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:17:18,208 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:17:18,209 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:17:18,212 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:17:18,213 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:17:18,217 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:17:18,221 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:17:18,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:17:18,234 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:17:18,236 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:17:18,239 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:17:18,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:17:18,251 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:17:18,252 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:17:18,256 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:17:18,257 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:17:18,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:17:18,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:17:18,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:17:18,267 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:17:18,268 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:17:18,270 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:17:18,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:17:18,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:17:18,275 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:17:18,276 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:17:18,278 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:17:18,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:17:18,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:17:18,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:17:18,281 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:17:18,282 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:17:18,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:17:18,283 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/config/svcomp-Overflow-64bit-Taipan_Default.epf [2021-11-19 14:17:18,350 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:17:18,351 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:17:18,353 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:17:18,353 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:17:18,353 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:17:18,354 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:17:18,354 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:17:18,354 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:17:18,362 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:17:18,363 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:17:18,364 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:17:18,364 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:17:18,365 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:17:18,365 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:17:18,365 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:17:18,366 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:17:18,367 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:17:18,367 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 14:17:18,367 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:17:18,368 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:17:18,368 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:17:18,368 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:17:18,368 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:17:18,369 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2021-11-19 14:17:18,369 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:17:18,369 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:17:18,370 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:17:18,370 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:17:18,370 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:17:18,373 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:17:18,373 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:17:18,374 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:17:18,374 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:17:18,374 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:17:18,375 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:17:18,375 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:17:18,375 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:17:18,375 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:17:18,376 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_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9ec0bf4392c8fe4647c82e62efb5bebaadd0d7bdbc2edef80a3ce856001f6a7d [2021-11-19 14:17:18,692 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:17:18,715 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:17:18,718 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:17:18,719 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:17:18,720 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:17:18,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/termination-crafted-lit/Ben-Amram-LMCS2010-Ex2.3.c [2021-11-19 14:17:18,818 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/data/97f98050b/dc770197dbc7454aa5ffb4cd984cea2e/FLAGc21df8476 [2021-11-19 14:17:19,331 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:17:19,332 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/sv-benchmarks/c/termination-crafted-lit/Ben-Amram-LMCS2010-Ex2.3.c [2021-11-19 14:17:19,339 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/data/97f98050b/dc770197dbc7454aa5ffb4cd984cea2e/FLAGc21df8476 [2021-11-19 14:17:19,723 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/data/97f98050b/dc770197dbc7454aa5ffb4cd984cea2e [2021-11-19 14:17:19,726 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:17:19,729 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:17:19,730 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:17:19,730 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:17:19,734 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:17:19,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:17:19" (1/1) ... [2021-11-19 14:17:19,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb87338 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:19, skipping insertion in model container [2021-11-19 14:17:19,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:17:19" (1/1) ... [2021-11-19 14:17:19,745 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:17:19,768 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:17:19,917 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:17:19,921 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:17:19,967 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:17:19,985 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:17:19,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:19 WrapperNode [2021-11-19 14:17:19,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:17:19,987 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:17:19,987 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:17:19,988 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:17:19,997 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:19" (1/1) ... [2021-11-19 14:17:20,003 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:19" (1/1) ... [2021-11-19 14:17:20,021 INFO L137 Inliner]: procedures = 4, calls = 2, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 37 [2021-11-19 14:17:20,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:17:20,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:17:20,023 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:17:20,023 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:17:20,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:19" (1/1) ... [2021-11-19 14:17:20,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:19" (1/1) ... [2021-11-19 14:17:20,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:19" (1/1) ... [2021-11-19 14:17:20,034 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:19" (1/1) ... [2021-11-19 14:17:20,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:19" (1/1) ... [2021-11-19 14:17:20,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:19" (1/1) ... [2021-11-19 14:17:20,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:19" (1/1) ... [2021-11-19 14:17:20,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:17:20,044 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:17:20,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:17:20,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:17:20,046 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:19" (1/1) ... [2021-11-19 14:17:20,053 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:17:20,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:17:20,091 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:17:20,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:17:20,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:17:20,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:17:20,230 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:17:20,232 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:17:20,364 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:17:20,385 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:17:20,386 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-19 14:17:20,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:17:20 BoogieIcfgContainer [2021-11-19 14:17:20,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:17:20,390 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:17:20,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:17:20,394 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:17:20,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:17:19" (1/3) ... [2021-11-19 14:17:20,395 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3979ba06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:17:20, skipping insertion in model container [2021-11-19 14:17:20,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:17:19" (2/3) ... [2021-11-19 14:17:20,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3979ba06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:17:20, skipping insertion in model container [2021-11-19 14:17:20,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:17:20" (3/3) ... [2021-11-19 14:17:20,397 INFO L111 eAbstractionObserver]: Analyzing ICFG Ben-Amram-LMCS2010-Ex2.3.c [2021-11-19 14:17:20,403 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:17:20,404 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-19 14:17:20,464 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:17:20,473 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 [2021-11-19 14:17:20,473 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-19 14:17:20,491 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) [2021-11-19 14:17:20,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-19 14:17:20,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:20,498 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-19 14:17:20,499 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)] === [2021-11-19 14:17:20,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:20,509 INFO L85 PathProgramCache]: Analyzing trace with hash 2066791, now seen corresponding path program 1 times [2021-11-19 14:17:20,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:20,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793749703] [2021-11-19 14:17:20,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:20,529 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:20,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:20,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:20,741 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:17:20,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793749703] [2021-11-19 14:17:20,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793749703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:20,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:20,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-11-19 14:17:20,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583570086] [2021-11-19 14:17:20,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:20,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:20,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:20,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:20,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:20,803 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) [2021-11-19 14:17:20,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:20,896 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-11-19 14:17:20,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:20,900 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 [2021-11-19 14:17:20,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:20,909 INFO L225 Difference]: With dead ends: 30 [2021-11-19 14:17:20,909 INFO L226 Difference]: Without dead ends: 27 [2021-11-19 14:17:20,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:20,918 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:20,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 18 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 14:17:20,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-19 14:17:20,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 21. [2021-11-19 14:17:20,957 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) [2021-11-19 14:17:20,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2021-11-19 14:17:20,960 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 4 [2021-11-19 14:17:20,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:20,961 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2021-11-19 14:17:20,961 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) [2021-11-19 14:17:20,962 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2021-11-19 14:17:20,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-11-19 14:17:20,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:20,963 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-11-19 14:17:20,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:17:20,964 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)] === [2021-11-19 14:17:20,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:20,965 INFO L85 PathProgramCache]: Analyzing trace with hash 2066599, now seen corresponding path program 1 times [2021-11-19 14:17:20,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:20,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389482794] [2021-11-19 14:17:20,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:20,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:20,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:20,997 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:17:20,997 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389482794] [2021-11-19 14:17:20,998 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389482794] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:20,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:20,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 14:17:20,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076876322] [2021-11-19 14:17:20,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:21,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:21,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:21,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:21,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:21,019 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) [2021-11-19 14:17:21,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:21,063 INFO L93 Difference]: Finished difference Result 21 states and 26 transitions. [2021-11-19 14:17:21,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:21,064 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 [2021-11-19 14:17:21,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:21,066 INFO L225 Difference]: With dead ends: 21 [2021-11-19 14:17:21,066 INFO L226 Difference]: Without dead ends: 19 [2021-11-19 14:17:21,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:21,069 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:21,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 4 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-19 14:17:21,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-19 14:17:21,075 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) [2021-11-19 14:17:21,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-11-19 14:17:21,081 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 4 [2021-11-19 14:17:21,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:21,082 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-11-19 14:17:21,082 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) [2021-11-19 14:17:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-11-19 14:17:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-19 14:17:21,095 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:21,095 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-19 14:17:21,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 14:17:21,096 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)] === [2021-11-19 14:17:21,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:21,097 INFO L85 PathProgramCache]: Analyzing trace with hash 64070575, now seen corresponding path program 1 times [2021-11-19 14:17:21,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:21,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790884209] [2021-11-19 14:17:21,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:21,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:21,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:21,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:17:21,128 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:17:21,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790884209] [2021-11-19 14:17:21,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790884209] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:21,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:21,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-19 14:17:21,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145781987] [2021-11-19 14:17:21,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:21,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:21,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:21,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:21,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:21,132 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) [2021-11-19 14:17:21,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:21,164 INFO L93 Difference]: Finished difference Result 19 states and 23 transitions. [2021-11-19 14:17:21,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:21,165 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 [2021-11-19 14:17:21,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:21,166 INFO L225 Difference]: With dead ends: 19 [2021-11-19 14:17:21,167 INFO L226 Difference]: Without dead ends: 18 [2021-11-19 14:17:21,167 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:17:21,170 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 4 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:21,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 11 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-19 14:17:21,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-19 14:17:21,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-19 14:17:21,186 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) [2021-11-19 14:17:21,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-19 14:17:21,187 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 5 [2021-11-19 14:17:21,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:21,188 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-19 14:17:21,188 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) [2021-11-19 14:17:21,193 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-19 14:17:21,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-19 14:17:21,193 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:21,194 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-19 14:17:21,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 14:17:21,195 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)] === [2021-11-19 14:17:21,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:21,196 INFO L85 PathProgramCache]: Analyzing trace with hash 64064617, now seen corresponding path program 1 times [2021-11-19 14:17:21,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:21,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398703885] [2021-11-19 14:17:21,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:21,199 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:17:21,226 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-19 14:17:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-19 14:17:21,267 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-19 14:17:21,267 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-19 14:17:21,269 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONINTEGER_OVERFLOW (5 of 6 remaining) [2021-11-19 14:17:21,271 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONINTEGER_OVERFLOW (4 of 6 remaining) [2021-11-19 14:17:21,272 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONINTEGER_OVERFLOW (3 of 6 remaining) [2021-11-19 14:17:21,272 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONINTEGER_OVERFLOW (2 of 6 remaining) [2021-11-19 14:17:21,273 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONINTEGER_OVERFLOW (1 of 6 remaining) [2021-11-19 14:17:21,274 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONINTEGER_OVERFLOW (0 of 6 remaining) [2021-11-19 14:17:21,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 14:17:21,280 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-19 14:17:21,285 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-19 14:17:21,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.11 02:17:21 BoogieIcfgContainer [2021-11-19 14:17:21,333 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-19 14:17:21,334 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-19 14:17:21,335 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-19 14:17:21,335 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-19 14:17:21,336 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:17:20" (3/4) ... [2021-11-19 14:17:21,339 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-19 14:17:21,397 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/witness.graphml [2021-11-19 14:17:21,398 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-19 14:17:21,400 INFO L158 Benchmark]: Toolchain (without parser) took 1669.71ms. Allocated memory was 113.2MB in the beginning and 155.2MB in the end (delta: 41.9MB). Free memory was 84.9MB in the beginning and 120.4MB in the end (delta: -35.5MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. [2021-11-19 14:17:21,400 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 113.2MB. Free memory is still 65.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:17:21,401 INFO L158 Benchmark]: CACSL2BoogieTranslator took 256.19ms. Allocated memory is still 113.2MB. Free memory was 84.8MB in the beginning and 88.2MB in the end (delta: -3.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-19 14:17:21,402 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.41ms. Allocated memory is still 113.2MB. Free memory was 88.2MB in the beginning and 86.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:17:21,402 INFO L158 Benchmark]: Boogie Preprocessor took 20.62ms. Allocated memory is still 113.2MB. Free memory was 86.7MB in the beginning and 85.8MB in the end (delta: 913.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:17:21,403 INFO L158 Benchmark]: RCFGBuilder took 344.43ms. Allocated memory is still 113.2MB. Free memory was 85.8MB in the beginning and 76.4MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-19 14:17:21,403 INFO L158 Benchmark]: TraceAbstraction took 943.52ms. Allocated memory was 113.2MB in the beginning and 155.2MB in the end (delta: 41.9MB). Free memory was 75.9MB in the beginning and 122.5MB in the end (delta: -46.6MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-19 14:17:21,404 INFO L158 Benchmark]: Witness Printer took 63.55ms. Allocated memory is still 155.2MB. Free memory was 122.5MB in the beginning and 120.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-19 14:17:21,408 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 113.2MB. Free memory is still 65.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 256.19ms. Allocated memory is still 113.2MB. Free memory was 84.8MB in the beginning and 88.2MB in the end (delta: -3.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 34.41ms. Allocated memory is still 113.2MB. Free memory was 88.2MB in the beginning and 86.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 20.62ms. Allocated memory is still 113.2MB. Free memory was 86.7MB in the beginning and 85.8MB in the end (delta: 913.6kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 344.43ms. Allocated memory is still 113.2MB. Free memory was 85.8MB in the beginning and 76.4MB in the end (delta: 9.4MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 943.52ms. Allocated memory was 113.2MB in the beginning and 155.2MB in the end (delta: 41.9MB). Free memory was 75.9MB in the beginning and 122.5MB in the end (delta: -46.6MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 63.55ms. Allocated memory is still 155.2MB. Free memory was 122.5MB in the beginning and 120.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s 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 VAL [x=1, y=2, z=1] [L21] COND TRUE y > x [L22] y = z [L23] x = __VERIFIER_nondet_int() [L24] x - 1 VAL [x=-2147483648, y=1, z=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: 0.8s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 26 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 26 mSDsluCounter, 33 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 11 mSDsCounter, 5 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 32 IncrementalHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 5 mSolverCounterUnsat, 22 mSDtfsCounter, 32 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s 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, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 6 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.1s 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! [2021-11-19 14:17:21,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7b630e2a-9fb3-4a69-82c6-b0cd35d51eb7/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(OVERFLOW)